Specifications

A3.1 Communication cable programming UNIT/KOS

The connection is made with one 3-wire cable (TXD, RXD, GND)

When using shielded standard cable (3 * 0.14, not twisted in pairs) a maximum

length of 15 meters is recommended. A connection interruption is registered in

both the PCS 200 and 850 and noted in the fault word (ABx.6/ABx.7) for further

evaluation.

A3.1.1 Screening of the communication cable

The screen should be connected on both sides to a metal coated connector case.

The screen can also be connected to pin 1 when using non-metal coated connector

cases. However, this is not recommended for error-technical reasons. There, the

data lines should be covered as completely as possible by the screen! With

grounding at both sides is to be noted however that possibly (because of ground

potential shifts) a potential compensation wire is required having at least 10 times

the screen cross section (reason: compensation currents should not flow through

the cable screen if possible!). This applies particularly if PCS and programmable

controller are not connected to the same earthing point. This is for example valid

where the PCS and programmable controller are not housed in one switching

cabinet! For double sided earthing, use a cable earthing bar, type CER 001, AEGS

E-NR. 424 244 739 on the PCS side. Install according to AEG instructions!

Communication

A3. Communication