RAD Data comm FOM-E3 Manuel d'instructions télécharger pdf (Page 27)

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

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

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RAD Data comm FOM-E3 Manuel d'instructions Page 27