Vacuum Control System for the Photon Beamlines - European XFEL

European X-Ray Free-Electron Laser Facility GmbH

Albert-Einstein-Ring 19

22761 Hamburg

Germany

XFEL.EU TN-2013-005-02

TECHNICAL NOTE

Control System for the Photon Beamlines

July 2015

T. Korsch

for the X-Ray Optics and Beam Transport group (WP73)

at European XFEL

July 2015 XFEL.EU TN-2013-005-02 2 of 35 Technical Note: Control System for the Photon Beamlines

Contents

Revisions ..................................................................................................................... 4

Preface ......................................................................................................................... 5

1 Communication ................................................................................................. 6

1.1 PLC ........................................................................................................ 6 1.1.1 Bus terminals............................................................................. 6 1.1.2 Bus terminals for additional controller ....................................... 7

1.2 Operating parameters ............................................................................ 8 1.2.1 Vacuum pressure ...................................................................... 8 1.2.2 Cooling water flow ..................................................................... 8 1.2.3 Cooling water conductance ....................................................... 8 1.2.4 Compressed air ......................................................................... 8 1.2.5 Temperatures ............................................................................ 8 1.2.6 Beam shutter ............................................................................. 9 1.2.7 Valve ......................................................................................... 9 1.2.8 Motors ....................................................................................... 9

1.3 Software ................................................................................................. 9 1.3.1 PLC software ............................................................................. 9 1.3.2 GUI software ............................................................................. 9 1.3.3 GUI for a control system ......................................................... 10 1.3.4 Emergency system .................................................................. 10

1.4 Graphical user interface ....................................................................... 10 1.4.1 Symbols ................................................................................... 10 1.4.2 Buttons .................................................................................... 13 1.4.3 Service pages.......................................................................... 13 1.4.4 Log book .................................................................................. 14 1.4.5 Archive .................................................................................... 14 1.4.6 Automatic email ....................................................................... 14

2 Protection ......................................................................................................... 15

2.1 Safety during power failure .................................................................. 15 2.1.1 Power blackout ........................................................................ 15 2.1.2 Switch over .............................................................................. 15

2.2 Vacuum control and machine protection systems ............................... 15 2.2.1 Beam dump ............................................................................. 16 2.2.2 Machine stop ........................................................................... 17

2.3 Service work ......................................................................................... 17

3 Hardware .......................................................................................................... 18

3.1 PLC ...................................................................................................... 18 3.1.1 Bus coupler to controller ......................................................... 18 3.1.2 Bus terminals........................................................................... 18

XFEL.EU TN-2013-005-02 July 2015 Technical Note: Control System for the Photon Beamlines 3 of 35

3.2 PLC topology ........................................................................................ 19 3.3 Power concept ...................................................................................... 21

3.3.1 Power for bus coupler ............................................................. 21 3.3.2 Power for components ............................................................ 22

3.4 Connectors ........................................................................................... 22 3.4.1 Stepper motor.......................................................................... 22 3.4.2 Encoder ................................................................................... 22

3.5 Cable .................................................................................................... 23 3.5.1 Labels for cables ..................................................................... 24 3.5.2 Cable for valves ...................................................................... 25 3.5.3 Cable for ion pumps ................................................................ 25 3.5.4 Cable for sensor fast valve ...................................................... 25 3.5.5 Cable for temperature measurement ...................................... 25 3.5.6 Cable for creates / bus coupler ............................................... 26

4 PLC program logic .......................................................................................... 27

4.1 Global variables.................................................................................... 27 4.1.1 Global variables ...................................................................... 27 4.1.2 Main global .............................................................................. 27 4.1.3 Low global ............................................................................... 27

4.2 Main functions ...................................................................................... 27 4.2.1 PLC lock .................................................................................. 28

4.3 Logic functions for components ........................................................... 28 4.3.1 Logic for valves ....................................................................... 28 4.3.2 Ion pump controller ................................................................. 29 4.3.3 Experiments ............................................................................ 29 4.3.4 Fast valve ................................................................................ 30

A Abbreviations .................................................................................................. 31

B Cabling connection guidelines ...................................................................... 32

B.1 Cable for ion pumps ............................................................................. 32 B.1.1 Seven-part connector .............................................................. 32 B.1.2 Six-part connector ................................................................... 34

B.2 Pin array ............................................................................................... 35


Revisions

Version Date Description

1.1 23 Jul. 2015 Second release: Added all components with motion to the control systems Separated equipment protection from vacuum control

1.0 10 Dec. 2013 First release


Preface

In the European XFEL tunnel, X-ray light will be transported in beamlines

from the source point to the experiment. The main objective of the control

system for beam transport and optics is to enable the machine to run free of

imperfections in time for end-user operation.

The control system is divided into three subsystems: vacuum, motion, and

equipment protection.

The main goal of the vacuum control system is to take care of the vacuum in

the beamline and to protect the accelerator for vacuum.

The motion control system is for any movable device that is not vacuum-

related. For the optical characteristics of the light, monochromators, mirrors,

shutters, slit systems, apertures, and other parts will be installed. These

optical devces are typically movable in the beam. Motion control system

hardware and software is suitable for all electric or pneumatic moving parts

that are not relevant to vacuum.

The equipment protection control system is designed to ensure the secure

operation of the beam for the experiments. It takes care of correct water

cooling, air compression, and other supply media.


1 Communication

Communication in the context of the control system means the information

exchange between the PLC, bus coupler, and controller for components, as

well as the information that will be shown to the control person.

1.1 PLC The PLC will be a Beckhoff system with EtherCAT Bus. The system will be

built in a ring structure (see Figure 1) for each control part. The PLC is

outside the tunnel and connected to a bus coupler inside the tunnel. With an

optical fiber to decouple any grounding or shielding problems, the EtherCAT

signal is transferred to a patch panel in the electronic rack. The optical fiber is

a single-mode fiber. The signal will transfer from one coupler to the next

coupler on wire with a cable in RJ45 geometry if the distance is less than

100 m.

Figure 1: EtherCAT Terminals and PLC

1.1.1 Bus terminals

The bus coupler provides an EtherCAT line for different terminals. The

terminals read physical signals, switch voltage, open or close contacts, or

send and read data protocols.

Tunnel

EtherCAT – Rj45

Cable < 100 m

Master

PLC

LWL single-mode

Bus coupler


Figure 2: Bus coupler and terminals for different signals

Table 1: Function of the terminals

Function Type Low High Range Signal

Digital input ES1008 0 V 24 V — —

Digital output ES2008 0 V 24 V — —

Digital output (fast < 3 ms) ES2202 0 V 24 V — —

Analog input ES3164 — — 0–10 V —

ES3054 — — 4–20 mA —

Communication EL6002 — — — 2 x RS232

EL6022 — — — 2 x RS485

Temperature ES3314 — — — Type K

ES3202 — — — PT100

Relay output ES2624 4 x NO contacts

Bus coupler EK1101 EtherCAT coupler

EK1122 Two-port EtherCAT junction

EK1501-0010 EtherCAT coupler for single mode fibre junction

EK1521-0010 One-port EtherCAT fibre optic junction

1.1.2 Bus terminals for additional controller

The control system and its terminals provide a lot of communication protocols,

such as RS232, RS485, and RS422.

RS485 communication is used for the following:

Ion pump controller (Agilent Technologies, Type 4UHV Ion Pump

Controller)

Turbo pump controller (Pfeiffer TCP 350)

Limit switch

Vacuum pressure

Pump controller

Digital

Analog

RS485

Bus

coupler

with

terminals


1.2 Operating parameters

1.2.1 Vacuum pressure

The ion pump controller is from Agilent, Type 4 UHV, with a negative high

voltage of up to 7 kV. There are two types of controllers: one can provide four

pumps with 80 W (Model 9299400); the other can control two pumps with

200 W (Model 9299020). The current for an ion pump is in relation to the

vacuum pressure, so the information about the vacuum can be read out by

the controller for the ion pumps. The controller provides the standard RS485

protocol and a threshold for an adjustable vacuum pressure. With a wire

connection between the controller and the terminals, the PLC can read the

vacuum pressure information and alarms. The vacuum pressure is read out

via RS485, and alarm signals are read out by the contact threshold in the

controller to digital input terminals.

1.2.2 Cooling water flow

With additional boxes, the flow rate can be measured. The box gives a

4–20 mA signal according to the flow.

The cooling water is also measured with a temperature switch. If the

temperature is too high, a contact will open.

1.2.3 Cooling water conductance

The conductance is measured in the cooling water.

1.2.4 Compressed air

The compressed air is measured with a pressure device. The box gives a

4–20 mA signal according to the pressure. For some devices, a sensor with a

simple switchpoint opens an electrical contact if the pressure is below the set

value. Minimimum compressed air will be measured in every tunnel.

1.2.5 Temperatures

For temperatures, a PT 100 (platinum with a resistor of 100 Ω by 0°C) should

be used. Only in some special cases is a thermocouple Type K allowed.


1.2.6 Beam shutter

The signal for the open and closed position of the beam shutter must be read

out by an end switch with a positive opening operation.

1.2.7 Valve

The limit switch in the open and closed position provides the signal for the

valve position. The switch closes if the valve is in the end position.

1.2.8 Motors

1.2.8.1 Encoder

The encoder is for motors work with a separate cable in SSI or incremental

technique.

1.2.8.2 Switches

A limit switch immediately stops the moving and allows just a turn in direction

to the other side.

A homing or calibration switch cannot be used for an emergency stop.

1.3 Software

1.3.1 PLC software

The PLC runs with TwinCAT 3. Logic functions and tasks are programmed

there.

1.3.2 GUI software

For the graphical user interface (GUI), a Karabo server is connected to the

PLC. It allows the display of all main data. Actions can be performed at this

level to the PLC, but the logic in the PLC program can override the actions.

For example, if you create a macro to open a value, but the pressure is not

OK, the PLD blocks the command.


Figure 3: GUI for the interlock

1.3.3 GUI for a control system

The GUI is based on Karabo software. User operations are split into five

levels of access rights: Admin, Expert, Operator, User, and Observer.

1.3.4 Emergency system

For the main tasks, a display is directly connected to the PLC. It allows a

simple diagnostic for the complete system and control components without

any network.

1.4 Graphical user interface The main goal of a good GUI is provide an intuitional use and understanding

of the system. Without a lot of explantion, the GUI must provide a simple way

to open and close valves without any risk. The GUI is defined in the “XFEL

User Interface Style Guide”:

https://xfel-wiki.desy.de/XFEL_User_Interface_Style_Guide

1.4.1 Symbols

Symbols for components are based on the International Electrotechnical

Commission “Graphical Symbols for Use on Equipment” (IEC 60417) and the

European Committee for Electrotechnical Standardization “Safety of

Master

PLC

Karabo

server

PC

PC

PC

Display

Network USB,DVI

https://xfel-wiki.desy.de/XFEL_User_Interface_Style_Guide


Machinery – Electrical Equipment of Machines – Part 1: General

Requirements” (EN 60204-1:2006).

In addition, the following symbols are used:

Beamline

Single solid line in black (Figure 4).

Aperture

Isosceles triangle with the small side to the experiment side (Figure 8). If

there is a temperature alarm, it switches from white to red. The small side

is half the length of the side. The inner angle is 70° and 120°.

Figure 4: Beamline

Figure 5: Open (vertical back line) and closed (vertical red line) valve


Figure 6: In-range (white circle) and failed (red circle) vacuum pressure

Figure 7: Ion Getter pump with vacuum pressure and an on/off button

Figure 8: Low (white) and high (red) aperture temperature

2.5e-8 off

on

XDT2, 75m, Controller 4


Figure 9: GUI for the vacuum interlock at the PETRA III beamline

1.4.2 Buttons

Buttons are visible in different rules to the user. For experts, all buttons are

visible. For guests, no buttons are visible.

Buttons are visible only if the user role enables the user to switch them. The

caption of a button is black or grey if it cannot be used or is out of order. A

single button can have only one function. That is, there are two buttons for

any given valve: one for open and one for closed. A single button cannot

switch between open and closed.

1.4.3 Service pages

A service page is useful for a quick and efficient search for problems. This

page includes all backup information, all hidden properties, and a log book.

The service page shows information such as cooling water, compressed air,

hardware status, power supplies status, counter for valves, and so on.


1.4.4 Log book

All activities on the PLC must be logged with a time stamp and shown in a

text field. Every action is logged in text format (without any special characters

or symbols): “component, action, time”. The component defines kind and

place. The action is the change of the component. The time is defined as

year, month, day, hour, minute, and second in the format

YYYY.MM.DD.hh.mm.ss (e.g. Valve V3102, closed, 2015.03.12.13.43.21).

1.4.5 Archive

Some data will be saved for several years with a low frequency.

The following data must be stored 10 times a minute:

Vacuum pressure, readout of the controller

Cooling water temperature

Compressed air

Configuration of each ion pump controller

1.4.6 Automatic email

For some tasks, an automatically generated email will be sent. For minor

tasks, an SMS will be sent.


2 Protection

For all control systems, faultless operation of the system is essential. Any

minor fault, which can stop the machine, causes a delay in the experiments.

Any major fault must be protected by hardware and software components.

2.1 Safety during power failure

2.1.1 Power blackout

Power failure means a complete disruption of the supply voltage in the whole

system, or a failure in one unit without a bridge to the redundancy module. If a

power failure occurs, the system must switch to Save status.

In Save status, the following occurs:

All valves close without power connection.

Machines dump to protect the valves.

2.1.2 Switch over

If the mains voltages switch off for less than 100 ms the System must run

without a failure. For this kind of power failure, each power supply bridges a

gap of 30 ms. This provides the section of the beamline with power, using a

redundancy system in which each power supply runs with a normal load of

50% total operating performance.

2.2 Vacuum control and machine protection systems The machine protection system (MPS) is the process used to maintain the

safety of the accelerator and to shut down and stop the system, if needed.


The vacuum control system is responsible stopping the accelerator if

something happens that threatens the safety of the controlled beamlines. The

shutdown will activate with a change of one bit via the RS422 protocol.

Figure 10: Communication between vacuum PLC and MPS

2.2.1 Beam dump

In some cases, the accelerator must be pumped to protect the beamline and

its components.

These cases are:

Tripping of a fast shutting valve.

Unexpected non-opening of a valve. In this case, the activator is active,

and the open end switch is lost.

In each of these cases, an alarm is sent to the user. The alarm indicates

which case produced the shutdown.


2.2.1.1 Hardware for beam dump

The machine shutdown is possible on a separate RS422 line. The beam

dump will activate with a change of one bit via the RS422 protocol.

Two elements are directly connected to this line:

Fast valve

The control unit for a fast shutting valve is directly connected to this line.

Software identification of a failure

The PLC shutdown will switch on separate Beckhoff ES2202 terminals

with a fast output of < 1 μs.

2.2.2 Machine stop

The accelerator must stop to protect the beamline and its components in the

following cases:

Temperature alarm

Cooling water flow

Failure of a global variable (see Section 2.1, “Safety during power failure”,

on page 15)

Valve closed by PLC

Hardware failure

— A power supply is not working.

— No compressed air.

2.3 Service work For service or repair of components in the tunnel that are controlled by the

PLC, a safety key can be removed from the panel at the control station.

Without this key, the PLC does not allow movement of any device. The PLC

indicates that the key is missing. Workers are responsible for their own work

and safety.


3 Hardware

The hardware of the PLC, bus coupler, terminals, and power supply is defined

in this chapter. The systems with PLC, bus coupler, and bus terminals use a

modular technique. In this modular structure, the interpolation of new

components can be done quickly and easily.

3.1 PLC For the control system, the Advanced Electronics group will program the PLC.

In most of the systems, a Beckhoff PLC with EtherCAT protocol is to be used.

3.1.1 Bus coupler to controller The bus coupler and additional terminals provide a lot of communication

protocols, such as BiSS-C, RS232, RS485, and RS422.

3.1.2 Bus terminals The bus coupler provides an EtherCAT line for different terminals. The

terminals read physical signals, switch voltage, or send and read data

protocols.

Table 2: Function of the terminals

Function Type Low High Range Signal

Digital input ES1008 0 V 24 V — —

Digital output ES2008 0 V 24 V — —

Analog input ES3164 — — 0–10 V —

ES3054 — — 4–20 mA —

Communication EL6002 — — — RS232

EL6022 — — — RS485

Stepper motor ES 7041 — — — —

SinCos encoder ES 5021 — — — —

Temperature ES3314 — — — Type K

ES3202 — — — PT100

Bus coupler EK1122 Two-port EtherCAT junction EK1521 One-port EtherCAT fibre optic junction

RS 485 EL6022 2-channel serial interfaces RS485, D-sub connection


3.2 PLC topology For each SASE tunnel, one PLC each is responsible for the vacuum, motion,

and equipment protection control systems. For example, SASE 1 has three

PLCs, and these PLCs controls Experiments 10–12.

Figure 11: SASE tunnel definition

All PLCs work in the same hierarchy without a master PLC. They

communicate via EtherCAT with each other and each PLC in the Karabo

system.


Figure 12: Topology

Karabo Server

Bus coupler n

Bus coupler 2

Bus coupler 1

Bus coupler n

Bus coupler 2

Bus coupler 1

PLC

1

PLC

2

PLC

n

Bus coupler n

Bus coupler 2

Bus coupler 1

EtherCAT

XFEL network


Figure 13: Signal communication

3.3 Power concept The system works with 24 V DC. Other voltages must be provided with

different power supplies and need extra terminals. 24 V are also provided for

the components. The 24 V circuit is protected with a glass fuse. The power

supply is protected against short circuits and overloads. All wires must

connect to the terminals without screws; only spring terminals are allowed.

If another voltage is required (e.g. 12 V), a separate power supply can be

requested from the X-Ray Optics and Beam Transport group.

3.3.1 Power for bus coupler

For each bus coupler in the tunnel, there are two power supplies with a power

balance module that provides the 24 V. The two power supplies are on

different phases (L1, L2) and get their own fuse. The power supplies and the

balance module have alarm contacts for temperature and overcurrent, which

are read out.

PLC 1

MPS RS 422

Switch contacts EtherCAT

Bus coupler Fast valve

controller


3.3.2 Power for components

The components for the vacuum interlock, such as actuators for valves, end

switches, gauges, and so on are served by the power supply of the bus

coupler.

3.4 Connectors The list of connectors is defined by the Advanced Electronics group.

Components in the tunnel are hard installations. On the PLC side, no

connector is provided. A patchboard is at the device and not at the electronic

rack. Cables are fixed at one end on the PLC terminals and attached at the

other end to the patchboard at the component.

3.4.1 Stepper motor

For the stepper motor, LEMO Type 3B is defined with 8 pins and the key

system G. Limit switches are “normally closed” contacts. For more information

about the pin array, see Section B.2, “Pin array”.

3.4.2 Encoder

For the encoder, Lemo Type 1B is defined with 8 pins and the key system C.

For more information about the pin array, see Section B.2, “Pin array”


3.5 Cable For cable inside the tunnel, the DESY specifications are obligatory.

Name: “Technische Spezifikation Energieversorgung Nr. 13/2005 über

brandschutztechnische Anforderungen an halogenfreie und flammwidrige

Kabel und Leitungen in den Anlagen von DESY”

The respective DIN VDE 0100 references apply.

Connections to cable cores to crimp are always preferred before screwing

and before soldering.


3.5.1 Labels for cables

One side of the cable includes a label with the distance in the tunnel in

metres. The other side includes the rack number.

Table 3: Label system for cables

Letter / Number L N N NN N L

Sample V 1 0 15 0 G

Component type • Gauge

– C = Cold cathode – F = Full range – P = Pirani – S = Spinning rotor

• Pump – I = Ion P. – M = Membran P. – N = NEG P. – R = Rootsp. – S = Scroll P. – T = Turbo P.

• Valve – A = Angel V. – D = Dosing V. – F = Fast V. – G = Gate V. – M = All Metal V. – V = Vatterfly V.

Future upgrades Strart 0..9

Component counter Two numbers 00..99

Beamline zone • 0 = From hand-over point with WP19 up to separation

chamber • 1 = Center • 2 = Left • 3 = Right

Beamline number • 1 = SASE 1 • 2 = SASE 2 • 3 = SASE 3

Component category • G = Gauge • P = Pump • V = Valve


3.5.2 Cable for valves

For a valve, a cable with 5 cores with a M12 connector (female straight) is

available for use. On the PLC side, this cable is directly connected to the

terminals. On the other side, it has a connector.

3.5.3 Cable for ion pumps

For the cable from the ion pumps to the high voltage controller, a cable of the

following type should be used:

DESY HV-CABLE 0.9/3.2 + 1x0.35mm² - DRAKA – yyyy – ZERO HALOGEN 09 3211173 207171642 nnn m

Where “yyyy” is the year of manufacturing and “nnn” is the lineal meter. This

cable type includes a core for high voltage that is shielded and a second core

for the interlock connection. For detailed information about this cable, see

Appendix B.1, “Cable for ion pumps”.

3.5.4 Cable for sensor fast valve

The cable for the senor fast valve is similar to the cable for ion pumps. The

only difference is that a different connector is used.

3.5.5 Cable for temperature measurement

For a temperature measurement with PT 100, a three-core cable should be

used.

Figure 14: Temperature measurement with PT100 in a three-port cable

For thermocouple Type K, a cable of IEC standard must be used, with green

coat, red (+), and white (-) isolation.


3.5.6 Cable for creates / bus coupler

The cable colours inside the create are define in Table 4. These colours

should be used tor additional boxes or wiring.

Table 4: Cable colours for creates

Signal Colour

L1, L2, L3 Brown, grey, black

N Light blue

PE Green / yellow

+24 V Red

0 V Dark blue

Digital in / out Red

Analog in / out Red

Relay signal extern Black

RS232, RS422, RS485

Tx White

Rx Brown


4 PLC program logic

The various parts of essential PCL program logic are described in this

chapter.

4.1 Global variables In general, some variables must be provided.

4.1.1 Global variables

Machine status: shut down / run

Beamshutter: open / close

4.1.2 Main global

Compressed air: n.n bar

Cooling water flow: nnn l/h

Temperatures in range: nn°C

4.1.3 Low global

Power supply for each bus coupler: operate and temperature in range

Vacuum pressure for each pump: n.n e–n mbar

Valve position: open / closed

4.2 Main functions This section describes the main functions.


4.2.1 PLC lock

In accordance with EN60204-1: For safe work at a component or part of a

system, it is necessary to switch off the system and get a status that no

moving parts can be dangerous to people.

This lock closes all valves and beam shutters, and prevents them from re-

opening even if someone attempts to switch from the GUI. If the lock is re-

locked, all valves and beam shutters must opened by hand in the GUI

Figure 15: Key–lock layout for the PLCs

4.3 Logic functions for components

4.3.1 Logic for valves

Valves are normally open.

They close when one of the following conditions (failures) occurs:

Vacuum pump fails in a section

Global variable fails in the section

User can close a valve by clicking a button in the GUI

PLC

SASE 1

PLC

SASE 2

PLC

SASE 3

PLC

SASE 4

PLC

SASE 5

TO LOCK UNPLUG THE KEY


Activator is active but the open end switch is not active after three

seconds

A valve can close only when the beam shutter is closed before the valve. If

one pump controller fails for ≤ 3 seconds, the valves does not close the

section.

The open and closed cycles are counted for each valve.

Valves can be opened when:

Vacuum pressure on both sides of the valve is in range.

The open and closed positions are registered with end switches. If both end

switches are not active for more than three seconds, the PLC must create an

alarm.

4.3.2 Ion pump controller

The ion pump controller can be switched on and off by clicking in the GUI.

Switching off is possible only when the valve has closed the section.

Switching on is possible in expert mode

The ion pump controller provides the vacuum pressure information of the

pump. A operation time counter have to run for each pump and for the

controller.

The configuration for connected pumps, set points, alarms, and steps of fixed

voltage must be adjusted, saved to the archive, loaded to the controller, and

backed up to the Karabo server. The information can then be loaded onto

new controllers, overriding their standard configurations.

4.3.3 Experiments

For all experiments, an ion pump on the side of the experiment is necessary

to make sure the vacuum pressure is adequate to open a valve.


Figure 16: Signal interchanges for the experiment and vacuum interlock

4.3.4 Fast valve

These valves close directly with their own controller. The PLC gets the status

of the valve. The valve can be opened and closed in normal operation

through the GUI and can be reset if it closes for safety reasons. Signals of the

sensors are read out and shown in the GUI.


A Abbreviations

GUI graphical user interface

MPS machine protection system

ms milliseconds

PLC programmable logic control

RGA residual gas analyser

SASE self-amplified spontaneous emission

UPS uninterrupted power supply


B Cabling connection guidelines

B.1 Cable for ion pumps

B.1.1 Seven-part connector

Figure 17: Seven connector parts: (a) collet nut, (b) collet, (c) reducing cone, (d) split

insert carriers, (e) contact, (f) insulator + contact, and (g) housing subassy

To prepare the cable for ion pumps with a seven-part connector, follow these

steps:

1 Strip off 45 mm of red cable coating.

2 Cut the white string.

3 Strip off 25 mm of white cable coating.

4 Strip off 20 mm of clear cable coating.

5 Prepare the 5 mm core.


6 Put the collet nut (a), collet (b), and reducing cone (c) on the cable.

7 Solder the contact (e) on the core.

8 Solder the red “interlock” core on both contacts at the insulator +

contact (f).

9 Insert the split insert carriers (d) and fix the housing subassy (g).


B.1.2 Six-part connector

Figure 18: Six connector parts: (a) collet nut, (b) collet, (c) elbow outlet, (d) contact,

(e) insulator + contacts, and (f) housing subassy

To prepare a cable for ion pumps with a six-part connector, follow these

steps:

1 Strip off 40 mm of red cable coating.

2 Cut the white string.

3 Strip off 20 mm of white cable.

4 Strip off 15 mm of clear cable coating on 15mm.

5 Prepare the 5 mm core.

6 Put the collet nut (a), collet (b), and reducing cone (c) on the cable.

7 Solder the contact (f) onto the core.

8 Solder the red “interlock” core onto one contact at the insulator +

contact (f).

9 Solder the plate between the two contacts.


10 Fix the housing subassy(g).

B.2 Pin array Table 5: Connectors use for stepper motors and encoders

Pin array Pin Motor Encoder Encoder SSI

1 2 3 4 5 6 7 8

A1 A2 GND Ub+ B1 B2 CW Limit CCW Limit

A+ A- B+ B- I+ I- Ub+ GND

D+ D- C+ C- DIR STAT V+ GND

Vacuum Control System for the Photon Beamlines - European XFEL

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Transcript of Vacuum Control System for the Photon Beamlines - European XFEL