User Manual

Connection diagrams for the SDLC ring

The connection diagrams below illustrate principal wiring of a VISONIK BPS on the

SDLC ring without field phone connection. More detailed instructions are provided in the

Mounting and Installation Handbook M8017E.

Connection of a

VISONIK BPS on the

SDLC ring

W1 Cable type 4-core twisted 4 x 1, star-4 III Terminal block III on the BPS

W2 Cable type twisted pair 2x 2 (communication card PVC1....)

1A IN A (SDLC ring) 11A IN A (SDLC ring)

2B IN B 12B IN B

3A OUT A 13A OUT A (amplified signals)

4B OUT B 14B OUT B (amplified signals)

7 Screened SDLC ring cable and earth

conductor *)

17 Screened SDLC ring cable and earth

conductor *)

*) The terminals 7 and 17 must be used only to earth the SDLC ring cable’s screening. Both connections are

internally connected via terminal block III. As a result, only one of them must be earthed. Connection G0 of

the BPS power supply is not connected to these terminals.

Wiring without ring signal amplification on

return: Only for short ring lines!

Wiring with ring signal amplification on

return.

Basic SDLC ring

wiring

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Siemens Building Technologies Building Process Station CM2N8302en

Building Automation 28-Jan-04

 2004 Siemens Buildin

Technolo

ies Ltd. Sub

ect to chan