EAW DSA250i, DSA230i owner manual Fault Detect Supervisory Monitoring

FAULT DETECT RELAY CONNECTOR

POWER END

NC (NORMALLY CLOSED)

COM (COMMON) NO (NORMALY OPEN)

NOTE: Normally only 2 terminals are used (COM & NO or NC)

Figure 5.3.2 Fault Detect Connection

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5.3 Fault Detect - Supervisory Monitoring

This section details how to remotely monitor the operating status of a DSAi module. This is done by connecting a monitoring circuit, better known in the trade as a supervisory circuit, to the FAULT DETECT Form C relay integral to each DSAi module. The power to the FAULT DETECT relay coil is controlled by monitoring circuits that report the operating status of several critical DSAi functions. When any one of the monitoring circuits reports an out of tolerance operating status, the FAULT DETECT relay is powered off. The SPDT (single-pole, double throw) dry contacts are normally used to make or break power to an annunciator.

When a fault occurs, use DSAPilot's "Diagnostics" function to help determine the specific problem. See the DSAPilot Help file for information about Diagnostics.

IMPORTANT: Fault conditions are determined independently within each DSAi module. Therefore, a supervisory circuit must connect to each individual module, including each module within a DSAi Cluster.

5.3.1 FAULT DETECT RELAY OPERATION

The status of critical operating functions is continually monitored within each DSAi module. When a fault condition is detected for any of these functions within a DSAi module, its FAULT DETECT relay is powered off. After a fault is detected, it takes the monitoring circuitry approximately 2 seconds to power down the relay.

•Excessive Amplifier Temperature: Above 167° F / 75° C.

•Bad Amplifier Channel: Any amplifier channel reports its status as bad.

•Low Battery: The backup battery reports its status as low. This could lead to a potential loss of the modules DSP settings.

•Bad DSP: The DSP reports failure for any reason that interrupts the audio signal.

•No ac mains: The ac mains power is disconnected or lost.

5.3.2 FAULT DETECT CONNECTIONS

The FAULT DETECT is a Form C relay, the terminals defined by their state when the DSAi is powered off:

NO (Normally Open) COM (Common)

NC (Normally Closed).

Maximum ac and dc relay contact rating: 1 A @ 30 V

Conductor Gauge:

24 AWG to 18 AWG / 0.2 mm to 1 mm

The type of wiring or cable required will depend on the supervisory circuit requirements.