Specifications

Communication

C3.Cables

C3.1 PCS 780 adapter cable

The connection is made via a programmable controller MODBUS 1 interface (RS-

232).

C3.2Screening

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!