Corel Office Document - esd-electronics-usa.comDocument file:...

CPCI-405 Hardware Manual Rev. 3.4

esd electronic system design gmbhVahrenwalder Str. 207 • 30165 Hannover • Germany

www.esd-electronics.com • Fax: 0511/37 29 8-68 Phone: 0511/37 29 80 • International: +49-5 11-37 29 80

CPCI-405CompactPCI-Controller Board

with CAN and ETHERNET

Hardware Manual

to product: I.2306.xx


N O T E

The information in this document has been carefully checked and is believed to be entirely reliable. esdmakes no warranty of any kind with regard to the material in this document, and assumes noresponsibility for any errors that may appear in this document. esd reserves the right to make changeswithout notice to this, or any of its products, to improve reliability, performance or design.

esd assumes no responsibility for the use of any circuitry other than circuitry which is part of a productof esd gmbh.

esd does not convey to the purchaser of the product described herein any license under the patent rightsof esd gmbh nor the rights of others.

esd electronic system design gmbhVahrenwalder Str. 20730165 HannoverGermany

Phone: +49-511-372 98-0Fax: +49-511-372 98-68E-mail: [email protected]: www.esd-electronics.com

USA / Canada:esd electronics Inc.525 Bernardston RoadSuite 1Greenfield, MA 01301 USA

Phone: +1-800-732-8006Fax: +1-800-732-8093E-mail: [email protected]: www.esd-electronics.us


Document file: I:\texte\Doku\MANUALS\CPCI\CPCI405\Englisch\CP405_34H.en9

Date of print: 2007-05-16

Serial Number: from BC882

Changes in the chapters

The changes in the document listed below affect changes in the hardware as well as changes in thedescription of the facts, only.

Chapter Changes as compared with previous version

1.3.3 NVRAM specified

2.1 Table completed

3.1.2 Addresses inserted

3.2.1 Default settings corrected (Handshake: none)

3.3.1 Table completed

Technical details are subject to change without further notice.


This page is intentionally left blank.

CPCI-405 Hardware Manual Rev. 3.4 1

Contents Page1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Description of the CPCI-405 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2 PCB View with Connector Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51.3 Summary of Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3.1 General Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.3.2 CompactPCI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.3.3 Microprocessor and Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.3.4 Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.3.5 CAN-Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.3.6 ETHERNET Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.3.7 Software Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.3.8 Order Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2. Front Panel View with LED-Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.1 LEDs in the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.1 PowerPC Microcontroller PPC405GPr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123.1.2 Address Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1.3 Interrupt Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.2.1 Default Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.2.2 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.2.3 Connecting the RS-232-Interface SER 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2.4 Connecting the Serial Interface SER 1 with TTL-Level . . . . . . . . . . . . . . . . . . . . . 16

3.3 Function of Coding Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3.2 Switching the Boot-Flash-EPROM via Coding Switch Bit 4 . . . . . . . . . . . . . . . . . 17

3.4 CAN/DeviceNet Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183.4.2 Interface Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4. Connector Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.1 Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.1.1 SER 0: Assignment of the RJ12 Socket X700 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.1.2 SER 0: Connection Cable RJ12-DSUB9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.1.3 SER 0: DSUB-Socket when Using the Adapter Cable RJ12-DSUB9 . . . . . . . . . . . 224.1.4 SER 1: Assignment of the 6-pin Post Connector X710 . . . . . . . . . . . . . . . . . . . . . 23

4.2 CAN-Bus Interface (X1000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244.3 CAN-TTL Signals (X1010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.4 Option: DeviceNet-Adapter Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.5 ETHERNET 10/100BaseT Connection (X1200) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294.6 Debug Port X720 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.6.1 Signal Alignment of the 16-pole SMD-Strip and JTAG-Adapter (PCB-Rev. 1.x) . . 304.6.2 Signal Alignment of 8-pole SMD-Strip and JTAG-Adapter (from PCB-Rev. 2.x) . . 31

5. Special Designs: CPCI-405 with CPCI-CAN-ISO11898 Add-On . . . . . . . . . . . . . . . . . . . . 335.1 CPCI-405-2 PowerPC Host with 8 HP Front Panel (I.2306.49) . . . . . . . . . . . . . . . . . . . . 33


5.1.1 Front Panel view of CPCI-405-2 with Adapter Board and 8 HP Front Panel . . . . . 345.2 CPCI-405-A PCI-Adapter with 6 U Front Panel (I.2306.47) . . . . . . . . . . . . . . . . . . . . . . . 35

5.2.1 Front Panel view of the CPCI-405-A PCI-Adapter with 6 U Front Panel . . . . . . . . 365.3 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.3.1 RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.3.2 RS-422 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375.3.3 RS-485 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385.3.4 Solder Bridges for the Configuration of the Serial Interface SER1 . . . . . . . . . . . . . 39

5.4 Connector Assignments of the Special Designs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405.4.1 CAN-Interface CAN 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405.4.2 SER1: Assignment of the RJ12 Socket P100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6. Correctly Wiring Electrically Isolated CAN Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

7. CAN-Bus Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477.1 Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477.2 CAN_H/CAN_L Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487.3 Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487.4 CAN Transceiver Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Overview


+5 V=

+5 V=

FPGAControl LogicCAN1

CAN0

IRQ

FlashEPROM

NVRAM

IDE-CompactFlash

Interface

RJ4510/100BaseT

10/100BaseTTransceiver

RJ12SER 0

RS-232

RS-232Interface

Post ConnectorSER 1TTL

SDRAM

PPC405

CANBUS

Electrical Isolation

DC/DCConverter

DSUB9CiA pinning

CAN ControllerSJA1000

CompactPCI Connector

CAN ControllerSJA1000

PhysicalCANLayer

Post ConnectorCAN-TTL

1. Overview

1.1 Description of the CPCI-405 Board

Fig. 1.1.1: Block circuit diagram

The CPCI-405 is a CompactPCI board in Euro format. It is available as PCI-master CPU or asintelligent slave board. Both options only differ in the configuration of the PowerPC 405GPr processor.

Apart from a powerful CPU the PowerPC 405GPr processor has got an SDRAM controller, a PCI-businterface, a controller for serial interfaces and an MII-interface which is here used to realize anETHERNET interface.

In addition to Flash EPROM and NVRAM as system memory, the memory of the CPCI-405 has gotup to 128 Mbyte SDRAM as working memory. Furthermore, the board has got a CompactFlash cardinterface. The boards plugged in can be accessed by standard system drivers like an IDE-drive.

One of the two serial interfaces has been designed as an RS-232-interface. It can be accessed via anRJ12-connector in the front panel. The second serial interface is accessible via a post connector onboard. The signals of this interface are of TTL-level.

The CAN-interface which can be accessed via the front panel, is controlled by an SJA1000-CAN-controller. The interface corresponds to ISO11898, is electrically insulated and can be used fortransmission rates of up to 1 Mbit/s. The second CAN-interface has got an SJA1000-CAN-controlleras well.

Overview


The TTL-signals of both controllers are led to a post connector. Here, two adapter boards can beconnected via flat ribbon cables, realising the physical layer. The adapter boards are available with CAN(ISO11898) or DeviceNet interfaces. Optionally the CPCI-405 together with the adapter board isavailable in two special designs (page 33).

The ETHERNET interface is suitable for 10 Mbit/s and 100 Mbit/s networks. They are connected viaan RJ45 socket in the front panel.

The status of the board is shown by LEDs in the front panel.

Overview


1.2 PCB View with Connector Designations

Fig. 1.2.1: PCB view (diagram without front panel)

Overview


1.3 Summary of Technical Data

1.3.1 General Technical Data

Ambient temperature 0...50 C

Humidity max. 90 %, non-condensing

Power supply

via CompactPCI-bus,5 V ± 5% / 200 mA (from PCB-rev. 2.0 on)and3.3 V ± 5% / 800 mA (from PCB-rev. 2.0 on)

Connectors

X100 (132-pin post connector) - CompactPCI-board connector J1X101 (132-pin post connector) - CompactPCI-board connector J2X700 (6-pin RJ12-socket) - RS-232-interface (SER 0) X710 (6-pin post connector) - serial interface with TTL-level (SER 1)X720 (8-pin SMD socket) - debug interfaceX1000 (9-pin DSUB-connector) - CAN 0 (ISO11898)X1010 (10-pin post connector) - CAN 0 (TTL) + CAN 1 (TTL)X1100 (50-pin CompactFlash board connector) - CompactFlash boardsX1200 (8-pin RJ45-socket) - ETHERNET Twisted Pair (IEEE 802.3)

Dimensions 100 mm x 160 mm

Weight 200 g

Table 1.3.1: General technical data

Overview


1.3.2 CompactPCI Bus

Host bus PCI-bus in accordance with PCI Local Bus Specification 2.2

PCI-data/address bus 32 bits

Controller PowerPC 405GPr

Interrupt interrupt signal A, B, C, D

Board dimensionin accordance with PCI-Specification, Rev. 1.0

Connectors

Connector coding Universal Board, not keyed(3,3 V or 5 V signalling voltage)

Table 1.3.2: CompactPCI Bus interface

1.3.3 Microprocessor and Memory

CPUPowerPC 405GPr / 266 MHz (default at board type I.2306.04) /32 bit(up to 400 MHz as an option)

NVRAM

32 K x 8 bits NVRAM: Simtek STK14C88 (no battery required)

option: RTC with NVRAM STM M48T35Y (internal battery)

Flash-EPROM up to 4 M x 16 bits

Serial EEPROM 1 Kbyte

SDRAM 16 M x 32 bits (64 Mbyte) (default at board type I.2306.04)32 M x 32 bits (128 Mbyte) (optional)

CompactFlash slot

- for CompactFlash memory boards in accordance withCompactFlashTM specification

- suitable for board design type I- 3.3 V-power supply- controlled in ‘True IDE’ mode

Table 1.3.3: Microprocessor and memory

Overview


1.3.4 Serial Interfaces

Number 2

Controller PowerPC 405GPr

Bit rate Microcontroller: 300 bit/s ... 115.200 bit/sRS-232-Transceiver: max. 115.200 Kbit/s

Physical interface Serial 0: RS-232CSerial 1: TTL-level signals

Connectors Serial 0: 6-pin RJ12-socket in front panelSerial 1: 6-pin post connector on board

Table 1.3.4: Serial interfaces

1.3.5 CAN-Interfaces

Number 2

CAN-controller SJA1000

CAN-protocol CAN 2.0A/2.0B

Physical interfaceCAN 0: differential, connection in accordance with ISO 11898CAN 1: TTL-level, connection together with CAN 0-TTL to 10-pin

post connector

Transmission rate 10 Kbit/s ... 1 Mbit/s

Bus termination has to be terminated externally

ConnectorsCAN 0: DSUB9-connector in front panel and 10-pin post connector

for adapter board X1010CAN 1: 10-pin post connector for adapter board X1010

Adapter board- to be connected to 10-pin post connector X1010- available with differential CAN-interface (ISO11898) or

DeviceNet interface (with Combicon socket)

Table 1.3.5: CAN-interfaces

Overview


1.3.6 ETHERNET Interface

Number 1

Bit rate 10 Mbit/s, 100 Mbit/s

Controller PowerPC405GPr

Physical interface Twisted Pair (IEEE 802.3) 10/100BaseT

Electrical insulation via repeating coil

Connector 8-pin RJ45-socket in front panel

Table 1.3.6: ETHERNET interface

1.3.7 Software Support

The boot monitor U-Boot* is stored in the Flash memory. This makes it possible for the CPCI-405 toboot with various operating systems from the network, the local Flash memory or the Compact Flashmemory. The operating systems Linux and VxWorks are available with according drivers for the local interfaces.Further operating systems are available on request.Furthermore the CAN-transmission protocols CANopen and DeviceNet and a local WEB-server areavailable.

* http://sourceforge.net/project/u-boot

Overview


1.3.8 Order Information

Type Properties Order No.

CPCI-405 AMCC PowerPC405GPr, 266 MHz, 64 MB SDRAM,4 MB Flash, CPCI-host I.2306.04

CPCI-405-64 as I.2306.04, but AMCC PowerPC405GPr with 400 MHz I.2306.05

CPCI-405-Aas I.2306.04, but CPCI-target adapter I.2306.07

as I.2306.07, but with 4 HP / 6 U front panel I.2306.47

CPCI-405-A-64 as I.2306.05, but CPCI-target adapter I.2306.08

CPCI-405-2 as I.2306.04, but 2x CAN ISO11898 and 2x serial RS-232,8 HP / 3 U front panel I.2306.49

CPCI-405-VxW VxWorks BSP I.2306.30

CPCI-405-Linux Linux BSP/Adaption I.2306.32

CPCI-405-QNX QNX6 BSP I.2306.34

CPCI-405-ME English manual 1*)

(this manual) I.2306.21

CPCI-405-ENGEngineering Manual in English 2*)Content: Circuit diagrams, PCB top overlay drawing, data sheets of significant components

I.2306.25

1*) The manual is free, if it was ordered together with the product.2*) This manual is liable for costs, please contact our support.

Table 1.3.8: Order information

LED-Display


SE

R0

1

8

1

6

16

59

CA

N0

L E

TH R

CA

NR

UN

US

R10/100

CAN:RUN: USR: 10/100:

EjectLever

Link Status Ethernet LED

Receive Status Ethernet LED

CAN Active LEDBoard CPU RUN LEDUser-Defined LED10/100 Mbit/s Ethernet LED

CAN Interface CAN0 (X1000)

RS-232 Interface SER0 (X700)

Ethernet 10/100BaseT (X1200)

LED Display

2. Front Panel View with LED-DisplayThe module has got four LEDs in the front panel and another LED which can only be seen on the boarditself when the case is open.

2.1 LEDs in the Front Panel

Fig. 2.1.1: Position and colours of LEDs

LED-Display


Name Colour Meaning of LED when on

CAN greenCAN-frames are being received or transmittedThe LED is hardwired. The LED cannnot be controlled throughsoftware.

RUN green

local CPU is in RUN status (LED lights at every access to the SDRAM, therefore the LED can beblinking or permanently on in normal operation) The LED is hardwired. The LED cannnot be controlled throughsoftware.

USR greenapplication-specific programmable functionThe USR LED is controlled by the 405 GPr CPU’s GPIO24 signal. Clear GPIO24 to turn on the USR LED or set GPIO24 to turn it off.

RCV greenETHERNET bit rate: 100 Mbit/s The LED is hardwired. The LED cannnot be controlled throughsoftware.

Link Status green link status ETHERNET (link to server or hub detected)

ReceiveStatus yellow receive status ETHERNET (reception of ETHERNET-data packages)

Table 2.1.1: Display functions of LEDs

Description of Units


3. Description of Units

3.1 PowerPC Microcontroller PPC405GPr

3.1.1 General

The general functions of the PowerPC 405GPr will not be explained in this manual. The manual of themicrocontroller can be downloaded from the homepage of the manufacturer AMCC at:

http://www.amcc.com/Embedded/



3.1.2 Address Assignment

Start address[HEX]

End address[HEX] Unit

0x0000_0000 0x03FF_FFFF SDRAM (max. 64 Mbyte)

0X0000_0000 0xEF5F_FFFF PCI Core memory

Internal periphery:

0xEF60_0300 0xEF60_0307 UART0-register (see 405GP-Manual Table 3-6 , S. 3-9) *

0xEF60_0400 0xEF60_0407 UART1-register (see 405GP-Manual Table 3-7 , S. 3-10) *

0xEF60_0500 0xEF60_0510 IIC0-register (see 405GP-Manual Table 3-8 , S. 3-11)

0xEF60_0600 0xEF60_0601 OPB-arbiter register (see 405GP-Manual Table 3-9 , S. 3-12)

0xEF60_0700 0xEF60_077F GPIO-controller register (see 405GP-Manual Table 3-10 , S. 3-13)

0xEF60_0800 0xEF60_0867 Ethernet register (see 405GP-Manual Table 3-11 , S. 3-14)

0xF000_0000 0xF000_007F CAN-controller CAN 0

0xF000_0100 0xF000_017F CAN-controller CAN 1

0xF010_0000 0xF010_001F IDE/CompactFlash

0xF020_0000 0xF020_5FFF NVRAM (or NVRAM with RTC)Free: User Space (24 Kbyte)

0xF020_6000 0xF020_6FFFNVRAM (or NVRAM with RTC)Reserved: VxWorks and esd internal use (4 Kbyte)

0xF020_7000 0xF020_7FFF

NVRAM (or NVRAM with RTC)Reserved: PPCBoot/U-Boot environment variables (4 Kbyte)

Option NVRAM with RTC: RTC: Register start address end address

0xF020_7FF8 0xF020_7FFF

0xF040_0000 0xF04F_FFFF FPGA internal registers

0xFFC0_0000 0xFFDF_FFFF Flash-EPROM bank 0 (SST39VF160)

0xFFE0_0000 0xFFFF_FFFF Flash-EPROM bank 1 (SST39VF160)

Table 3.1.1: Addresses* The UARTS are 16550-compatible.



3.1.3 Interrupt Settings

Interrupt External IRQ Circuit Level Detection

IRQ 25 EXT IRQ 0 CAN0 low active, level sensitive

IRQ 26 EXT IRQ 1 CAN1 low active, level sensitive

IRQ 27 EXT IRQ 2 PCI-INT_A high active, level sensitive

IRQ 28 EXT IRQ 3 PCI-INT_B high active, level sensitive

IRQ 29 EXT IRQ 4 PCI-INT_C low active, level sensitive

IRQ 30 EXT IRQ 5 PCI-INT_D low active, level sensitive

IRQ 31 EXT IRQ 6 CompactFlash high active, level sensitive

Table 3.1.2: Interrupt Setting

All other interrupt sources are PowerPC405-internal. They are described in the PowerPC405-manual.



3.2 Serial Interface

3.2.1 Default Setting

The default setting for both serial interfaces is the following:

Bit rate: 9600 BaudData bits: 8Parity: noStop bits: 1Handshake: none

3.2.2 Configuration

The serial interfaces are controlled by the microcontroller PowerPC405GPr. The bit rate of theinterfaces can be configured. The serial controller integrated in the PowerPC405GPr and the RS-232driver used for interface SER 0 support bit rates of up to 115.200 kbit/s.

The bit rate can be changed by means of software. The procedure to change the bit rate depends on theoperating system, it is therefore advisable to refer to the manual of the operating system.



TxD

CTS

RTS

GND

RxDTxD

RxD

RTS

CTS

2

3

8

7

5GND

2

3

4

5

6

localsignal terms

pin numbers of the 9 pole DSUB connector, if the adapter cable RJ12-DSUB9 is connected

pin numbers of the 6 pole RJ12 connector

e.g. PC(Terminal, DTE)

CPCI-Board(Modem, DCE)

Adapter CableRJ12DSUB9-Female

3.2.3 Connecting the RS-232-Interface SER 0

The diagram is used to explain the short terms for signals as used in the chapter (ConnectorAssignments). The signal terms are exemplary for the connection of the CPCI-405 as a modem (DCE)via the adapter cable RJ12-DSUB9.

Fig. 3.2.1: Connection diagram for RS-232 operation

3.2.4 Connecting the Serial Interface SER 1 with TTL-Level

If another serial interface is required, an adapter, for instance, which converts TTL-signals into RS-232-signals can be connected to interface SER 1 via the 6-pin post connector X710 and flat ribbon cable.

Attention: The signals at the pins 3 and 6 will not only be used as TxD- and RxD-Signals. In theboot sequence of the PowerPC 405 these signals are used to define the setting of theoperation mode (Strapping Pins). The level is defined by high-impedance local resistorson the board.Therefore the user has to ensure, that no pull-up or pull-down resistors with valuessmaller than 10 kohm will be connected at the lines TxD-S1/STR17 or RxD-S1/STR18.This could be happen with some modem types !



3.3 Function of Coding Switch

3.3.1 Overview

Coding switchbit Function Default setting at delivery

1 no special function / general purpose OFF



4 switching the boot Flash-EPROM boot from Flash-EPROM U600

Table 3.3.1: Assignment of coding switch bits

The state of the DIP switches can be read at address 0xF040 0002. Each switch’s state is representedin the least significant bits.

3.3.2 Switching the Boot-Flash-EPROM via Coding Switch Bit 4

The local operating system is booted from the Flash-EPROM U600 per default (chip select CS0 ofPowerPC 405GP). By means of the coding switch the chip select signal can be switched so that theFlash-EPROM U610 will be accessed.

This switching can be used, for instance, to boot an ‘Emergency Operating System’ in the second FlashEPROM, if the board does not boot up again after a change in the default Flash-EPROM.

Position of codingswitch bit 4 Function

0 Memory area of Flash-EPROM U610 is at CS0

1 Memory area of Flash-EPROM U600 is at CS0(default setting)

Table 3.3.2: Meaning of coding switch bits 4



3.4 CAN/DeviceNet Unit

3.4.1 General

The CPCI-405 has got two independent CAN-channels. Each of these CAN-channels has got its ownSJA1000 controller.

CAN-channel CAN0 can be accessed via 9-pin DSUB connector X1000 in the front panel. An82C250/82C251 is used as driver unit. The differential CAN-bus signals are electrically insulated fromother potentials.

The signals of CAN-channel CAN1 are at post connector X1010 in the form of TTL-signals. The TTL-signals of CAN0 are also led to this connector. By means of a flat ribbon cable two adapter boards canbe connected to X1010. These adapter boards are available with the physical layer for CAN (ISO11898with DSUB-connector), or with the physical layer for DeviceNet (Combicon socket). The flat ribboncable for the connection of adapter boards can be fed through from one board to the next. Thisminimizes the wiring within the case.

Note: If the option of the external CAN or DeviceNet interface is used for CAN-channel CAN0via the adapter board, the local CAN-interface cannot be used anymore, because it wouldrequire a change in the equipping!



VCCin

IN

GNDin

VCCout

OUT

ENABLE

GNDout

VCCin

IN

GNDin

VCCout

OUT

ENABLE

GNDout

+5V

10K

RX0-C0#

+5V

VDD

TX

R/GND

BUSL

RX BUSH

+5V

CAN_L

CAN_H

5V

++

- -

+5V

CAN_GND

DC/DCR05ET05

2

7

TX0-C0# GND

VCC

GND

5V

VCC

CAN_GND3, 6

1, 4, 8, 9n.c.

GNDOptocouplerHCPL7710

OptocouplerHCPL7710

GND

VC05D150

10µF

2,2M

2,2nF/250V~

toCAN Controller

CAN Transceiver82C25o/82C251

5Shield

DSUB9male

VCCin

IN

GNDin

VCCout

OUT

ENABLE

GNDout

VCCin

IN

GNDin

VCCout

OUT

ENABLE

GNDout

+5V

RX00*

+5V

VDD

TX

R/GND

BUSL

RX BUSH

+5V

CAN-

CAN+

3

2

4

TX00*

GND

VCC GNDOptocouplerHCPL7710

OptocouplerHCPL7710

GND

22µF/35V

CAN Transceiver82C251

5

1

+VSense

Comp

SC CAP

-V

PRLL5819

220pFDC

SE

CAN_GND

V-

V+

1R

3K6/1%

1K2/1%

100µ

H

PRLL5819

MC34063A

CombiconMSTB2,5/5-5,08

Shield

CombiconMSTB2,5/5-5,08

VC05D150

+5V

2

4

1

10

10-pole post connector

3.4.2 Interface Circuits

The following diagram represents the principal circuit of the CAN-interface. The local CAN-interfaceof CAN0 is identically constructed to the CAN-interface on the adapter board.

Fig. 3.4.1: Circuit of CAN-interface

Fig. 3.4.2: Circuit of the DeviceNet interface on the adapter board

Connector Assignment


1 2 3 4 5 6

4. Connector Assignment

4.1 Serial Interfaces

For details on the connection of serial interfaces please refer also to chapter ‘Serial Interfaces’ onpage 15. From the principle circuit diagrams represented in that chapter, you will be able to clearlydetermine the signal direction (Rx Tx).

4.1.1 SER 0: Assignment of the RJ12 Socket X700

Pin Position:

Cut-out forfastening lever

Pin Assignment:

Pin Local Signal Names1 +5 V

2 TxD-S0Data Output

3 RxD-S0Data Input

4 RTS-S0Handshake Output

5 CTS-S0Handshake Input6 GND

The data direction of the signals is given as viewed from the CPCI-405 board.



1,5 m

RxD

GND

5 4 3 2 1

9 8 7 6

1

2

3

4

5

6

TxDTxD

RxD

GND

P1:

PCP2:

CPCI-405

RTS

CTS

1

2

3

4

5

6

7

8

9

1

6

+5V

CTS

RTS

P1DSUB female

9-pole

P2RJ12 (6P6C),

6-Pol.

local signalnames usedat CPCI-405

4.1.2 SER 0: Connection Cable RJ12-DSUB9



4.1.3 SER 0: DSUB-Socket when Using the Adapter Cable RJ12-DSUB9

Pin Position:

Pin Assignment:

Signal Pin Signal

n.c. 16 n.c.

RxD-S0 (output) 27 RTS-S0 (input)

TxD-S0 (input) 38 CTS-S0 (output)

n.c. 49 n.c.

GND 5 9-pin DSUB female

n.c. ... not connected

The names of the signals are specified as seen from the terminal (PC). The signal direction specifiedin brackets is shown as seen from the CPCI-405 board.



4.1.4 SER 1: Assignment of the 6-pin Post Connector X710

The signals of the serial interface SER 1 at X710 have TTL-Level!

Signal Connector pin Signal

+5 V 1 2 RxD

TxD-S1/STR17 3 4 GND

CTS 5 6 RTS-S1/STR18

Attention: The signals at the pins 3 and 6 will not only be used as TxD- and RxD-Signals. In theboot sequence of the PowerPC 405 these signals are used to define the setting of theoperation mode (Strapping Pins). The level is defined by high-impedance local resistorson the board.Therefore the user has to ensure, that no pull-up or pull-down resistors with valuessmaller than 10 kohm will be connected at the lines TxD-S1/STR17 or RxD-S1/STR18.This could be happen with some modem types !



4.2 CAN-Bus Interface (X1000)

The position of the signals in the DSUB-connector of CAN-channel CAN0 (X1000) in the front panel,and the DSUB-connector on the optional adapter board are identical.

Pin Position:

Pin Assignment:

Signal Pin Signal

1 reservedCAN0_GND 6

2 CAN0_LCAN0_H 7

3 CAN0_GNDreserved 8

4 reservedreserved 9

5 shield 9-pin DSUB male

Signal Description:

CAN0_L, CAN0_H... CAN-signal lines (generated from the CAN-controller TTL-signals Tx0-CAN0* and Rx0-CAN0*)

CAN0_GND ... reference potential of the local CAN-physical layer

shield ... potential of connector case

reserved ... reserved for future applications



4.3 CAN-TTL Signals (X1010)

Connector X1010 has been assigned with the Rx/Tx-signals of both CAN-controllers. The signals areon TTL-level and are not electrically insulated from the microcontroller units!

X1010 has been designed for the connection of the optional adapter boards to the physical layer forCAN or DeviceNet.

Signal name Pin Signal name

+5V 1 2 Tx0-CAN1*

Tx1-CAN1* 3 4 Rx0-CAN1*

Rx1-CAN1* 5 6 Tx0-CAN0*

Tx1-CAN0* 7 8 Rx0-CAN0*

Rx1-CAN0* 9 10 GND

Note: If the option of the external CAN or DeviceNet interface is used for CAN-channel CAN0via the adapter board, the local CAN-interface cannot be used anymore, because it wouldrequire a change in the equipping!This concerns the signals Tx0-CAN0* and Rx0-CAN0*.



12345

4.4 Option: DeviceNet-Adapter Boards

Both CAN-channels can be connected to two adapter boards by means of connector X1010. When usingthe DeviceNet option the adapter boards are equipped with Phoenix-Combicon connectors MSTB 2.5/-GF-5.08 (or equal).

The DeviceNet interface has been constructed in accordance with the ‘DeviceNet CommunicationModel and Protocol, Rel. 2.0’. The power for the CAN-bus driver is here supplied externally.

Pin Position: Pin Assignment:

Pin Signal

1 V-

2 CAN-

3 shield

4 CAN+

5 V+

Signal Description:

V+... power supply (UVCC = 24 V ± 4%)

V-... reference potential to V+ and CAN+/CAN-

CAN+, CAN-... CAN-signal lines

shield... shield(connected to ground via high-impedance RC-member)



INOUT

INOUT

X1010

CAN-CPCI/405

Case Panel

CAN/DeviceNetAdapter 1CAN Net 0

CAN/DeviceNetAdapter 2CAN Net 1

Ribbon Cable

FixingBrackets

DSUB9 orDeviceNetConnector

8,2o 3.2

10,725,3

27,836,0

9,0

10,3

42,55

7,3

o 3.8

20,5

11,4

25,0

The DeviceNet option includes the CPCI-405, the DeviceNet-adapter board, the flat ribbon cable, thefastening angles and all screws, nuts and securing plates required.

Fig. 4.3.1: Wiring of adapter boards

The dimensions specified in the following diagrams are in millimetres.

Fig. 4.3.2: Cut-out in the case wall for adapterboards with DeviceNet connector

Fig. 4.3.3: Cut-out in the case wall for adapterboards with DSUB9-connector



5,0 5,0

15,0

15,0

20,0

40,0

56,0

15,0

4,0

27,0

27,0

max. 4,0

Fig. 4.3.4: Recommended space at the externalcase wall for adapter boards withDeviceNet connector (considers forinstance the following Phoenix Combiconconnector groups:MSTB, MSTBP, MVSTBR, MVSTBW,TMSTBP)

Fig. 4.3.5: Recommended space at the externalcase wall for adapter boards withDSUB9 connector

Fig. 4.3.6: Minimum required space within the casefor adapter boards with DeviceNet orDSUB9 connectors



1 2 3 4 5 6 7 8

4.5 ETHERNET 10/100BaseT Connection (X1200)

Pin Position:


Pin Assignment:

Pin Signal

12345678

TP01 (TxD+)TP02 (TxD-)TP03 (RxD+)TP04TP05TP06 (RxD-)TP07TP08

8-pin RJ45-socket



123456789

10111213141516

123456789

10111213141516

TDOn.c.TDITRST*n.c.

TCKn.c.TMSn.c.HALTn.c.n.c.Key (n.c.)n.c.GND

to X72016-pole SMD-Strip

JTAG Connector16-pole Post Connector

10k Pull-Up to 3.3V

4.6 Debug Port X720

With the debug port e.g. firmware updates can be executed. It can be connected via a SMD-pin contactstrip connector. It is recommended to build a simple adapter from the SMD-pin contact strip connectorto a 16-pin post connector to connect the port.

At the CPCI-405 board of the first series (PCB-rev. 1.x) a SMD-pin contact strip connector with 16 pinsis used. Later series of the CPCI-405 (from PCB-rev. 2.x) carry an 8-pin SMD-pin contact stripconnector.

Attention: The SMD-pin contact strip connector case has no polarity! Take care to insert it intothe correct position. The orientation of the pins of X720 is shown at page 5.

4.6.1 Signal Alignment of the 16-pole SMD-Strip and JTAG-Adapter (PCB-Rev. 1.x)

Example of anAdapter (Uncasted)

Connectors to build adapter: SMD-pin contact strip: Fa. Samtec, ‘modified pin contact strip’, order-no. MTMS-116-52-T-S-205

2.54 mm post connector: i.e. Fa. Harting, 16-pole, straight, order-no. 09185167324



12345678

123456789

10111213141516

TDOTDITRST*

n.c.TCKTMS0

n.c.

HALT

n.c.n.c.Keyn.c.

GND

n.c.

n.c.

10k Pull-Up to 3.3V

to X7208-pole SMD-Strip

JTAG Connector16-pole Post Connector

4.6.2 Signal Alignment of 8-pole SMD-Strip and JTAG-Adapter (from PCB-Rev. 2.x)

Example of anAdapter (Uncasted)

Connectors to build adapter: SMD-pin contact strip: Fa. Samtec, ‘modified pin contact strip’, order-no. MTMS-108-58-T-S-485

2.54 mm post connector: i.e. Fa. Harting, 16-pole, straight, order-no. 09185167324

Special Designs with CPCI-CAN-ISO11898 Add-On


5. Special Designs: CPCI-405 with CPCI-CAN-ISO11898 Add-On

In the special designs the add-on CPCI-CAN-ISO11898 (I.2301.03) is already integrated in theCPCI-405 module which comes with a 8 HP front panel (I.2306.49) or a 6 U front panel (I.2306.47).The interfaces are easy to access as RS-232 interface (SER1) and as CAN interface (CAN1) directlyvia the front panel. In this chapter only the additional connectors of the CPCI-405 special designs aredescribed. Refer to the previous chapters for the description of the connectors X700, X1000, X1200 andthe LED-display.

5.1 CPCI-405-2 PowerPC Host with 8 HP Front Panel (I.2306.49)

In this design the adapter board CPCI-CAN-ISO11898 is connected directly to the CPCI-405.

(Fig. shows CPCI-405-2-Design up to S/N BC882)

Fig. 5.1.1: CPCI-405-2 with adapter board and 8 HP front panel



CAN

0SER

0

CPCI-405

SER1

CAN

1

1 1

6 6

1 1

5 5

6 6

9 9

1

6

L ETH

R

CA

NR

UN

US

R10/100

RS-232 Interface Ser0X700

CAN Interface CAN0X1000

Ethernet InterfaceX1200

EjectLever

CAN Interface CAN1P200

Serial Interface Ser1P100

5.1.1 Front Panel view of CPCI-405-2 with Adapter Board and 8 HP Front Panel

The assignment and display function of the LEDs and the position and assignment of connector X700,X1000 and X1200 are the same as described for the CPCI-405.

Fig. 5.1.2: Front panel view



5.2 CPCI-405-A PCI-Adapter with 6 U Front Panel (I.2306.47)

In this design the adapter board CPCI-CAN-ISO11898 is connected to the CPCI-405 via ribbon cable.

(Fig. shows CPCI-405-A-design up to S/N BC882)

Fig. 5.2.1: CPCI-405-A PCI-adapter with adapter board and 6 U front panel



CAN

0SER

0C

AN1

SER1

1

1

1

1

1

5

5

6

6

6

6

6

9

9

L ETH

R

CA

NR

UN

US

R10/100

EjectLever

EjectLever

Serial Interface Ser1P100

CAN Interface CAN1P200

RS-232 Interface Ser0X700

CAN Interface CAN0X1000

Ethernet InterfaceX1200

5.2.1 Front Panel view of the CPCI-405-A PCI-Adapter with 6 U Front Panel

The assignment and display function of the LEDs and the position and assignment of connector X700,X1000 and X1200 are the same as described for the CPCI-405.

Fig. 5.2.2: Front panel view of the CPCI-405 with 6 U Front panel



TxD

CTS

RTS

RxDTxD

RxD

RTS

CTS

2

3

8

7

5GND

2

3

4

5

6

CPCI-405

X710 X100 P100RJ12

DSUB9

GND

RxD

TxD

RTS

CTS

TxD-S1/STR17

RxD-S1

RTS-S1/STR18

CTS-S1

GND

EPPC-CAN-ISO

localsignal terms

pin numbers of the 9 pole DSUB connector, if the adapter cable RJ12-DSUB9 is connected

pin numbers of the 6 pole RJ12 connector

e.g. PC(Terminal, DTE)

Adapter CableRJ12DSUB9-Female

ConnectionX710X100

TxD

CTS

RTS

RxDTx+

Tx -

GND

2

4

6

CPCI-CPU405

X710 X100

P100RJ12

GND

RxD

TxD

RTS

RxD

TxDRx-5

Rx+3

TxD-S1/STR17

RxD-S1

RTS-S1/STR18

CTS-S1

GND

EPPC-CAN-ISO

localsignal terms

pin numbers of the 6 pole RJ12 connector P100

communicationpartner

ConnectionX710X100

5.3 Serial Interface

The serial Interface SER1 is per default configured for RS-232 operation. The interface can beconfigured as RS-422 or RS-485 interface via the solder bridges LB100 - LB103 (page 39). The following figures explain the code designation of the signals used in the connector assignments.

5.3.1 RS-232 InterfaceThe Figure exemplifies the connection of the CPCI-405 via the adapter cable RJ12 DSUB-socketto a terminal. The names of the signals of the adapter cable are chosen correspondingly.

Fig. 5.3.1: Connection scheme of RS-232 operation

5.3.2 RS-422 interface

Fig. 5.3.2: Connection scheme for RS-422 operation



TxD

CTS

RTS

RxDRx/Tx-

Rx/Tx +

GND

4

2

6

CPCI-405X710 X100

P100RJ12

ConnectionX710X100

GND

RxD

TxD

DE

RxD

TxD

TxD-S1/STR17

RTS-S1/STR18

RxD-S1

CTS-S1

GND

localsignal terms

pin numbers of the 6-pin RJ12 connector

EPPC-CAN-ISOcommunication

partner

TxD

Stop-Bit

t

DE(RTS-S1)

Data

5.3.3 RS-485 interface

Fig. 5.3.3: Connection scheme for RS-485 operation

For the RS-485 interface the data direction (receive/transmit) of the driver component has to beswitched by software. The data direction can be switched with the RTS-signal, which is connected withthe data enable (DE) of the driver component.

receive: DE(RTS) has to be set to ‘0’transmit: DE(RTS) has to be set to ‘1’ and reset with stop-bit

Fig. 5.3.4: Set RTS to transmit and receive



P200

LB102

LB103

LB101

LB100

5.3.4 Solder Bridges for the Configuration of the Serial Interface SER1

The serial interface SER1 can be configured with the solder bridges LB100 - LB103.

Fig. 5.3.5: Position of the solder bridges on the board (detail drawing)

Configuration of the serial interface SER1 with the solder bridges LB100-LB102:

solderbridge

RS-232interface

RS-422interface

RS-485interface

LB100 closed open open

LB101 closed closed open

LB102 open closed open

Table 5.3.1: Configuration of the serial interface SER1

With the solder bridge LB103 the FAST control pin can be set. The FAST control pin is used to selectthe slew-rate limiting of the RS-232 transmitters and the RS-485/422 driver. With the solder bridgeLB103 (FAST unasserted), the RS-232 transmitters and the RS-485/-422 driver are slew-rate limitedto reduce disturbances by electromagnetic impulses (EMI).For further information, please refer to the datasheet of the serial driver MAX3160: www.maxim.de



5.4 Connector Assignments of the Special Designs

5.4.1 CAN-Interface CAN 1

Pin Position:

Pin Assignment:

Signal Pin Signal

1 reservedCAN1_GND 6

2 CAN1_LCAN1_H 7

3 CAN1_GNDreserved 8

4 reservedreserved 9

5 Shield 9-pin DSUB connector

Signal Description:

CAN1_L, CAN1_H... CAN-signal lines (generated from the CAN-Controller TTL-signals Tx0-CAN1* and Rx0-CAN1*)

CAN1_GND ... reference potential of the local CAN-physical layer

Shield ... potential of the connector case

reserved ... reserved for future applications



1 2 3 4 5 6

5.4.2 SER1: Assignment of the RJ12 Socket P100

The serial interface SER1 of the adapter board can be configured as RS-232, RS-422 or RS-485interface. The configuration via the solder bridges is described in the previous chapter (see page 39).

For notes on the connection of serial interfaces please refer to chapter ‘Serial Interfaces’ on page 37.From the principle circuit diagrams represented in that chapter, you will be able to clearly determinethe signal direction (RxTx).

Pin Position:


Pin Assignment:

PinSignal

RS3232 RS422 RS4851 n.c. n.c. n.c.

2 TxD-S1Data Output Tx- Tx/Rx-

3 RxD-S1Data Input Rx+ n.c.

4 RTS-S1Handshake Output Tx+ Tx/Rx+

5 CTS-S1Handshake Input Rx- n.c.

6 GND GND GND

The data direction of the signals is given as viewed from EPPC-CAN-ISO adapter board.The signal direction does not switch automatically for the RS-485 interface! The signal direction mustbe set by software via RTS-control. An example for the assignment of a connection cable RJ12 DSUB9 for RS-232 operation isdescribed on page 21.



This page is intentionally left blank.

Wiring


9

1

4567

9

23

8

1

4567

23

8

CAN_L

CAN_H

CAN_GND

Shielded wire withtransposed wires

CAN_L

CAN_H

CAN_GND(at wire shield)

120

Ohm

120

Ohm

earth (PE)

Wire structure Signal assignment of wire and connection of earthing and terminator

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c. = not connected

DSUB9 connector(female or male)pin designation

connector case connector case

DSUB9 connector(female or male)pin designation

CAN wire with connectors

6. Correctly Wiring Electrically Isolated CAN NetworksGenerally all instructions applying for wiring regarding an electromagnetic compatible installation,wiring, cross sections of wires, material to be used, minimum distances, lightning protection, etc. haveto be followed.

The following general rules for the CAN wiring must be followed:

1.A CAN net must not branch (exception: short dead-end feeders) and has to be terminatedby the wave impedance of the wire (generally 120 W ±10%) at both ends (between thesignals CAN_L and CAN_H and not at GND)!

2.A CAN data wire requires two twisted wires and a wire to conduct the reference potential(CAN_GND)! For this the shield of the wire should be used!

3. The reference potential CAN_GND has to be connected to the earth potential (PE) at onepoint. Exactly one connection to earth has to be established!

4. The bit rate has to be adapted to the wire length.

5. Dead-end feeders have to kept as short as possible (l < 0.3 m)!

6. When using double shielded wires the external shield has to be connected to the earthpotential (PE) at one point. There must be not more than one connection to earth.

7. A suitable type of wire (wave impedance ca. 120 ±10%) has to be used and the voltageloss in the wire has to be considered!

8. CAN wires should not be laid directly next to disturbing sources. If this cannot be avoided,double shielded wires are preferable.

Figure: Structure and connection of wire

Wiring


l < 0,3 m

CAN_L

CAN_GND

CAN_H

PE

l < 0,3 m

CAN-CBM-AI4

CAN-CBM-COM1

CAN-CBM-DIO8

l < 0,3 ml < 0,3 ml < 0,3 m

Female Connector

Male Connector

e.g.CAN-SPS InterfaceCSC595/2orCAN-PC Board

Terminator

Male Terminator(Order-no.: C.1302.01)

Connecting CAN_GND toProtective Conductor PE

Terminatorwith PE Connector

Female Terminator(Order-no.: C.1301.01)

T-ConnectorC.1311.03

CAN-CableOrder-no.: C.1323.03

Net 2

Net 1 e.g. PCI/405,CAN-USB,

VME-CAN2, etc.






CAN-Board

T-ConnectorOrder-no.: C.1311.03

Cabling

for devices which have only one CAN connector per net use T-connector and dead-end feeder(shorter than 0.3 m) (available as accessory)

Figure: Example for correct wiring (when using single shielded wires)

Terminal Resistance

use external terminator, because this can later be found again more easily!

9-pin DSUB-terminator with male and female contacts and earth terminal are available asaccessories

Earthing

CAN_GND has to be conducted in the CAN wire, because the individual esd modules areelectrically isolated from each other!

CAN_GND has to be connected to the earth potential (PE) at exactly one point in the net!

each CAN user without electrically isolated interface works as an earthing, therefore: do notconnect more than one user without potential separation!

Earthing CAN e.g. be made at a connector

Wiring


Wire Length

Optical couplers are delaying the CAN signals. By using fast optical couplers and testing eachboard at 1 Mbit/s, however, esd CAN guarantee a reachable length of 37 m at 1 Mbit/s for mostesd CAN modules within a closed net without impedance disturbances like e.g. longer dead-endfeeders. (Exception: CAN-CBM-DIO8, -AI4 and AO4 (these modules work only up to 10 m with1 Mbit/s))

Bit rate[Kbit/s]

Typical values of reachablewire length with esd

interface lmax [m]

CiA recommendations(07/95) for reachable wire

lengths lmin [m]

1000 800

666.6 500

333.3 250 166 125 100

66.6 50

33.3 20

12.5 10

375980

130180270420570710

100014002000360054007300

2550

-100

-250

-500650

-1000

-2500

-5000

Table: Reachable wire lengths depending on the bit rate when using esd-CAN interfaces

Wiring


Examples for CAN Wires

Manufacturer Type of wire

U.I. LAPP GmbHSchulze-Delitzsch-Straße 2570565 StuttgartGermanywww.lappkabel.de

e.g.UNITRONIC ®-BUS CAN UL/CSA (UL/CSA approved)UNITRONIC ®-BUS-FD P CAN UL/CSA (UL/CSA approved)

ConCab GmbHÄußerer Eichwald74535 MainhardtGermanywww.concab.de

e.g.BUS-PVC-C (1 x 2 x 0.22 mm²) Order No.: 93 022 016 (UL appr.)BUS-Schleppflex-PUR-C (1 x 2 x 0.25 mm²) Order No.: 94 025 016 (UL appr.)

SAB Bröckskes GmbH&Co. KGGrefrather Straße 204-212b41749 ViersenGermanywww.sab-brockskes.de

e.g.SABIX® CB 620 (1 x 2 x 0.25 mm²) Order No.: 56202251CB 627 (1 x 2 x 0.25 mm²) Order No.: 06272251 (UL appr.)

Note: Completely configured CAN wires can be ordered from esd.

CAN-Bus Troubleshooting Guide


120

CAN_H

CAN_GND

CAN_LCAN_L

CAN_H

CAN_GND

V

120

2 3

1

V

1

7. CAN-Bus Troubleshooting GuideThe CAN-Bus Troubleshooting Guide is a guide to find and eliminate the most frequent hardware-errorcauses in the wiring of CAN-networks.

Figure: Simplified diagram of a CAN network

7.1 Termination

The termination is used to match impedance of a node to the impedance of the transmission line beingused. When impedance is mismatched, the transmitted signal is not completely absorbed by the loadand a portion is reflected back into the transmission line. If the source, transmission line and loadimpedance are equal these reflections are eliminated. This test measures the series resistance of theCAN data pair conductors and the attached terminating resistors.

To test it, please

1. Turn off all power supplies of the attached CAN nodes.2. Measure the DC resistance between CAN_H and CAN_L at the middle and ends of

the network (see figure above).

The measured value should be between 50 and 70 . The measured value should be nearly the sameat each point of the network.

If the value is below 50 , please make sure that:- there is no short circuit between CAN_H and CAN_L wiring- there are not more than two terminating resistors - the nodes do not have faulty transceivers.

If the value is higher than 70 , please make sure that:- there are no open circuits in CAN_H or CAN_L wiring - your bus system has two terminating resistors (one at each end) and that they are 120 each.



2

3

7.2 CAN_H/CAN_L Voltage

Each node contains a CAN transceiver that outputs differential signals. When the networkcommunication is idle the CAN_H and CAN_L voltages are approximately 2.5 volts. Faultytransceivers can cause the idle voltages to vary and disrupt network communication. To test for faulty transceivers, please

1. Turn on all supplies. 2. Stop all network communication.3. Measure the DC voltage between CAN_H and GND (see figure above).

4. Measure the DC voltage between CAN_L and GND (see figure above).

Normally the voltage should be between 2.0 V and 4.0 V. If it is lower than 2.0 V or higher than 4.0 V, it is possible that one or more nodes have faultytransceivers. For a voltage lower than 2.0 V please check CAN_H and CAN_L conductors forcontinuity. For a voltage higher than 4.0 V, please check for excessive voltage.

To find the node with a faulty transceiver please test the CAN transceiver resistance (see next page).

7.3 Ground

The shield of the CAN network has to be grounded at only one location. This test will indicate if theshielding is grounded in several places.

To test it, please

1. Disconnect the shield wire from the ground. 2. Measure the DC resistance between Shield and ground. 3. Connect Shield wire to ground.

The resistance should be higher than 1 M . If it is lower, please search for additional grounding of theshield wires.



4

5

6

CAN_H

CAN_GND

CAN_L

5 6

4

4

Power

CAN-Transceiver

Disconnect Power !

Disconnect CAN !

CAN-node

7.4 CAN Transceiver Resistance Test

CAN transceivers have one circuit that controls CAN_H and another circuit that controls CAN_L.Experience has shown that electrical damage to one or both of the circuits may increase the leakagecurrent in these circuits.

To measure the current leakage through the CAN circuits, please use an resistance measuring deviceand:

1. Disconnect the node from the network. Leave the node unpowered (see figure below).

2. Measure the DC resistance between CAN_H and CAN_GND (see figure below).

3. Measure the DC resistance between CAN_L and CAN_GND (see figure below).

Normally the resistance should be between 1 M and 4 M or higher. If it is lower than this range,the CAN transceiver is probably faulty.

Figure: Simplified diagram of a CAN node

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