Specifications

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A-8
A LAUER driver
A2 Communication
Adaptercable PCS 736 The connection is made via 2 TTY channels. The PCS supplies the line
current for both channels. Thus, a strict potential separation exists with
regard to the programmable controller.
When using shielded standard cable (4 * 0.14, untwisted) the following
recommended maximum length apply:
19200 baud 10 meters
9600 baud 20 meters
4800 baud 40 meters
1200 baud 160 meters
When using low-capacity data cables twisted in pairs the 10-fold lengths
can be projected. Interrupting the connection is registered by the PCS
009/090/095/900/9000/PCS plus and in the PCS 830. The fault is indi-
cated in the error word (DW3) for the further evaluation.
Screening
The shield should be connected on both sides to a metallized connector
hood. If non-metallized connector hoods are used, the shield may also
be connected to pin 1, but this is not recommended due to interferences,
because the data lines should be completely covered by the shield (if
possible). However, it should be noticed that grounding on both sides
may require an equipotential bonding conductor with a cross section of
10 times that of the shield in order to compensate for earth potential
variations and to prevent equalizing currents on the cable shield! This is
especially important, if the PCS and the programmable controller are not
connected to the same common point (if they are for example installed in
different control cabinets).