Instruction manual

Alarm Relay 4-1
Chapter 4
Diagnostics and
Troubleshooting
4.1 Alarm Relay
RIC-E3/ETH and RIC-T3/ETH include a dry contact alarm relay port supported via
9-pin connector for major and minor alarms. Major alarms are defined as E3/T3
electrical low levels. Minor alarms occur when an Alarm Indication Signal is
received at the E3/T3 electrical interface. The dry contact port operates as
Normally Open or Normally Closed, using different pins of the alarm relay port
connector (see Figure 4-1).
Alarm Connector
Minor-NO
1
2
6
4
5
9
Major-NO
Major Alarm Relay
Minor Alarm Relay
Minor-NC
Major-NC
Minor-COM
Major-COM
Figure 4-1. Alarm Relay Connector Pinout
The relay positions are shown in the non-energized state (alarm active).
Note