Manual

www.NienTech.de , eMail: info@nientech.de , Tel: +49 (0) 34721 - 41420

Introduction Designed especially for the 2-wire-technology of RS-485, the “USB-485-Mini” does not use any confusing configuration setups. The RS-485 interface allows a maximal cord length of 1000 m and the use of several devices. The interface converter can be obtained in the following variants.

Connection and LEDs

pin signal

X not used

A RS-485 Bus A

B RS-485 Bus B

Connection to the USB interface The device is connected to the pc through a USB-connection cord (contained in the shipment) to a free USB port. After the connection is made, the yellow power LED lights up. At first use, the operating system asks you to insert the driver-CD. Follow the instructions on the screen. If necessary you can find detailed installation instructions on our homepage www.NienTech.de. There you will also find information about uninstalling.

Connection to the RS-485 bus Connect A and B wires of the RS-485 bus to the locking ring and insert it into the interface converter.

Jumper settings Blue jumper (Echo on/off): An echo is created upon plugging the jumper in. Any bit sent will automatically be received as an echo. Several protocols check in this way the correctness of data transmission. Default: „Echo off“.

Red Jumper (optional resistors for bus termination): In general, both ends of a RS485 bus have to be terminated. If the device itself terminates a RS485 bus all three red jumpers have to be plugged in. Plugging in the jumpers connects the bus with the resistors for bus termination. All three jumpers should be jointly plugged either in or out.

Resistors: 2 x 390 Ω, 1 x 220 Ω Default: Resistors connected.

Accessories (not contained in the shipment) Optional for the 485-plug, a case with pulling relief is available.

Besides that a connection cord with RJ-45 plugs is available.

. The DIN-Schienen-Kit makes the assembly of the USB-485-Mini/R

on the DIN-Rail possible.

Device case material

isolation

USB-485-Mini synthetic No

USB-485-Mini/OP synthetic Yes

USB-485-Mini/R aluminium Yes

colour signal

yellow power

green RxData

red TxData

USB-485-Mini | USB-485-Mini/OP | USB-485-Mini/R

red jumper

blue jumper: echo

Manual

www.NienTech.de , eMail: info@nientech.de , Tel: +49 (0) 34721 - 41420

Technical Data

⇒ 2-wires, up to 32 bus participants

⇒ max. data rate 3 MBit/s

⇒ max. cable length 1000m (at 9600 Bit/s)

⇒ USB 2.0 compatibel, power supply over USB-port

⇒ Device variants: USB-485-Mini (synthetic case, without isolation), USB-485-Mini/OP (synthetic case, isolation to 2500V isolation voltage) USB-485-Mini/R (aluminium case, isolation to 2500V isolation voltage)

⇒ Optional jumper for echo on/off

⇒ Optional jumper for bus termination Resistors: 2 x 390 Ω, 1 x 220 Ω

⇒ Supply current: USB-485-Mini: 70 mA USB-485-Mini/OP: 95 mA USB-485-Mini/R: 95 mA

⇒ LEDs for power (yellow), Rx (green), Tx (red)

⇒ Plugged connector for RS-485

⇒ Sizes: synthetic case: 24x31x56 mm (without plug), aluminium case: 24x41x56 mm (without plug)

⇒ Driver for Windows 98, ME, 2000, XP, Vista, 7 und Linux since Kernel 2.4.18

Opening the synthetic casing Carefully lever up the device at both grooves using a small screw driver. Remove the top cover carefully.

Closing the synthetic casing Start fastening the top cover on the edge closer to the LEDs. Then fit the top cover onto the bottom cover with slight power.

Opening and closing the USB-485-Mini/R

Use the screws for opening the case.

Shipping Before installing the USB-485-Mini, check if the included in shipment is complete:

⇒ USB-485-Mini, USB-485-Mini/OP or USB-485-Mini/R

⇒ USB cord

⇒ unpluggable locking ring for RS-485

⇒ driver CD

⇒ manual Rev.: Rev.: 100204

The device complies with the safety provisions CE for electrical equipment devices.

USB

connector

RS-485 connector

and LEDs