Specifications

APPENDIX: Interface Specifications
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Appendix.
Interface Specifications
This appendix covers the specifications for the channel, ALARMS, CONTROL, and power connectors.
A.1 Channel Connectors
Each channel interface has one RJ-45 eight-pin connector. Connector wiring is listed in Table A-1.
Table A-1. RJ-45 channel connector, pin functions.
Pin Designation Direction Function
1 RD(R) Input Receive Data (ring)
2 RD(T) Input Receive Data (tip)
3 FG ↔ Frame Ground
4 TD(R) Output Transmit Data (ring)
5 TD(T) Output Transmit Data (tip)
6 FG ↔ Frame Ground
7, 8 — N/A Not connected
A.2 ALARMS Connector
The mux’s rear-panel ALARMS connector is a DB9 female, which includes the contacts of the major and minor
alarm relays. Figure A-1 shows the pin functions. The relay positions are shown in the non-energized (no alarm)
state. For more information, see Section 2.3.
Figure A-1. ALARMS connector wiring.