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PD 641 Wiring diagram
PD 641 with BM 013 base module:
If twin twisted pair cable is used, then use terminal connections B and C for one pair, and terminals A and D for the other.
When using a shielded cable, only terminal D should be connected to the screen, and only at this end of the cable. It is usually sufficient for the screen to be connected to terminal D, as shown in the wiring diagram, to ground 50-60 Hz interference. If high frequency interference is likely, it is highly recommended that the screen is permanently connected to chassis instead.
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