Clear-com BS850 (Last time buy) User Manual download pdf (Page 13)

Pin 1

19. Channel 1 Line Nulling Control — Use this adjustment to null the Channel 1, 2-wire connection when

attached to other cabled intercom devices. This control is active even if the 4-wire only mode is selected.

20. Channel 1 2-Wire Intercom Connector — Provides 3-pin female XLR connector for interfacing other

cabled intercom devices to Channel 1 on the PRO850.

NOTE: PRO850 does not provide or require 2-wire line power.

RTS

Mode: Pin 1 = Common Clear-Com

Mode: Pin 1 = Common

Pin 2 = Channel 1 Pin 2 = N/C

Pin 3 = Channel 2 Pin 3 = Channel 1

21. Clear-Com

/RTS

Select Button — In position = RTS

Mode Out position = Clear-Com

Mode

22. Channel 2 2-Wire Intercom Connector — Provides 3-pin female XLR connector for interfacing other

cabled intercom devices to Channel 2 on the PRO850.

NOTE: PRO850 does not provide or require 2-wire line power.

RTS

Mode: Pin 1 = Common Clear-Com

Mode: Pin 1 = Common

Pin 2 = Channel 1 Pin 2 = N/C

Pin 3 = Channel 2 Pin 3 = Channel 2

23. Channel 2 Line Nulling Adjustment — Use this adjustment to null the Channel 2, 2-wire connection when

attached to other cabled intercom devices. This control is active even if the 4-wire only mode is selected.

24. Channel 1 RJ45 4-wire Intercom Interface Connector — Use this RJ45

connector for 600Ω balanced interface of PRO850 Channel 1 with other

cabled intercoms. Pin designations are as follows.

Pins 1, 2, 7 & 8 have no connection

Pin 3 = Intercom Out +

Pin 4 = Intercom In +

Pin 5 = Intercom In –

Pin 6 = Intercom Out –

25. Channel 2 RJ45 4-wire Intercom Interface Connector — Same as #10, but for Channel 2.

26. Auxiliary Input Connector — Use this 3-pin female XLR/standard-phone-jack connector for balanced

+20dBV maximum auxiliary audio input. Pin 1 = Ground = Sleeve

Pin 2 = Audio + = Tip

Pin 3 = Audio – = Ring

27. Auxiliary Output Connector — Use this 3-pin male XLR connector for balanced +20dBV maximum

auxiliary audio output. Pin 1 = Ground

Pin 2 = Audio +

Pin 3 = Audio –

28. Paging Output Connector — Use this 3-pin male XLR connector for balanced +20dBV maximum paging

audio output. Pin 1 = Ground

Pin 2 = Audio +

Pin 3 = Audio –

29. 12-14VDC Power Jack — Use this connector for DC power input.

30. Page Relay Connector — Use this 4-pin Phoenix connector for relay closure based on Beltpac page

control. Switching capacity of the relay is 60W (2A @ 30VDC). Pin designations are as follows.

Pin 1 = Common

Pin 2 = Normally Closed

Pin 3 = Normally Open

Pin 4 = Ground

31. Alert Relay Connector — Use this 4-pin Phoenix connector for relay closure based on alert conditions.

Switching capacity of the relay is 60W (2A @ 30VDC). Pin designations are the same as for #16 above.

32. TRANSMIT Antenna Connector — Connect the transmitter antenna to this BNC connector. The color

band (if present) around the antenna should match the color dot (if present) near the connector on the base.

33. Grounding Screw — Tie this connector to earth ground if the chassis is not otherwise grounded.

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Clear-com BS850 (Last time buy) User Manual Page 13

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