Specifications

b) Table of data connector RS422 connections

Tab. 3.2: Table of data connector RS422 connections

DSUB9F

Screw

terminals

RS422

signal

71TxD-

32TxD+

83RxD-

24RxD+

55GND

c) Connection diagram of data cable RS485

When you are connecting RS485, your “A” has to be connected to TxD+ and RxD+ simultaneously

and “B” to TxD- and RxD- simultaneosly.

line A (+)

lineB(–)

7 6

ScrewterminalsforRS485

DSUB9F

lineB

line A

SCC

2 3 4 5

RS485

Fig. 3.2: Data cable RS485 connections

Note - For data connector RS485 connection see Table of data connector RS422 connections.

Important - For making data cables for connecting the user´s terminal equipment to the serial port we

recommend using a shielded cable, particularly in an industrial environment, and connecting the

shielding to GND (pin No. 5). When using a multi-core cable all free conductors should be connected

to pin No. 5. In the case of a galvanically separate port for RS485 (RS422) only ground one side of the

data cable. We recommend using only the necessary minimum length for data cables.

3.2.2. Distinguishing Data Modules by Colour

For RS232 RxD is the output from the router (approx. -6V when inactive) and TxD is the input to the

router (according to the RS 232 standard). Hardware versions of the interface can be distinguished

according to the colours of LED diodes next to the connector.

Tab. 3.3: Table for distinguishing LEDs for RxD and TxD by colour

Colour (RxD / TxD)Type of interface

red / greenRS232

orange / greenRS232 opt. separated

orange / yellowRS422/485 opt. separated

Connectors