evertz EQT Series, System Manual

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EQT Router User Manual
Revision 1.9.1
Page 15
2.7. ALARM CONNECTOR
A 2-pin alarm terminal provides external alarm indication. This is a simple interface over which
television equipment can report the occurrence of internal failures and faults in incoming signals. It is
intended for use in all television equipment.
The interface consists of an isolated closure, which can assume one of two states: open, or closed. The
respective signal indicates that the reporting device is okay, or has detected an internal fault.
The EQT may be in one of two states:
1. Normal operation – The EQT is currently not detecting any internal failures and is receiving
power.
2.
Internal failure – The EQT is currently detecting an internal failure or has lost power.
This requires that the user connect an external fault indicator and power supply to the alarm terminals.
The power supply should be 12 VDC max. and the current is limited to 20mA. An example is shown in
Figure 2-7.
Figure 2-7: Example Alarm Circuit

Note: Alarm option is not available in EQT-1602-CS, EQT-3204-CS and EQT-3224
newer rear plates.