External Alarm System Connections - ADC DIGIVANCE User Manual

ADCP-75-114 • Issue C • June 2001

2.6 External Alarm System Connections

The alarm interface between the RIU and an external alarm system is supported by a six-
terminal plug (with screw-type terminals) that connects to a receptacle on the RIU front panel.
The terminal plug provides connections to normally open (NO) and normally closed (NC) dry
type alarm contacts for both minor and major alarms. A category 3 or 5 cable is typically used
to connect the RIU to the external alarm system. Use the following procedure to install the
alarm wiring and connect it to the RIU:
1. Obtain the required length of category 5 cable.
2. Route the cable between the RIU and the external alarm system (if not already routed)
and then cut to required length. Allow sufficient slack for dressing and organizing the
cable at the RIU.
3. Strip back the outer cable sheath and insulation to expose the wires at both ends of the
cable and strip back 0.2 inches (5 mm) of insulation each wire.
4. Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NO
terminals (whichever is required by the external alarm system) on the RIU alarm terminal
connector (supplied with RIU) as shown in Figure 11.
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© 2001, ADC Telecommunications, Inc.
ANTENNA
CONNECTOR
TYPE-N MALE CONNECTOR
Figure 10. RIU Antenna Cable Connection
16653-A