TR-Electronic 65 Serie Montageanleitung Seite 130

Installation / Preparation for Commissioning
SSI – interface, optional
12
4.2
With the RS422 transmission one line-pair is used for the signals Data+ and Data–
and one line-pair for the signals Clock+ and Clock–.
The serial data are transmitted without mass reference as a voltage difference
between two corresponding lines.
The receiver evaluates only the difference between the two lines. Therefore common-
mode interferences on the transmission line do not lead to a corruption of the useful
signal.
By the use of shielded and twisted pair cable, data transmissions over distances from
up to 500 meters with a frequency of 100 kHz can be realized.
Under load RS422 transmitters provide output levels of ±2V between the two outputs.
RS422 receivers still recognize levels of ±200mV as valid signal.
12
Optional, must be supported by the device, see name plate or order
 TR-Electronic GmbH 2007, All Rights Reserved
Page 86 of 131 TR-ECE-BA-DGB-0063 v15
Printed in the Federal Republic of Germany
04/25/2022