DEVA Broadcast DB2003, Инструкция по техническому обслуживанию и эксплуатации

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GENERAL-PURPOSE OUTPUTS
DB2003 has three general purpose outputs: GPO1, GPO2 and GPO3. They have identical
functionality and are hereinafter to be referred to as GPO’s. Each GPO is the TLV817 optocoupler
photo transistor collector (NPN transistor, Vce = 30V max, Ic = 20mA max). Each of the three
emitters is connected to common ground. It may be seen as a normally open contact. A Pinout is
shown in “COM2 Connector” on page 11 .
You can set an appropriate alias for each GPO as a reminder of what it controls.
In accordance with its function, each GPO can be controlled by an alarm event, by ping watchdog
or manually. You can select whether an alarm event will cause opening or closing of the contact.
PLEASE NOTE that without a power supply, the GPO is normally open, which can be interpreted
as a false alarm.
With manual control or ping watchdog, you can select a stable status change or a change for a
certain amount of time (Pulse Duration).
In order for a GPO to be used as an alarm event output, the following three conditions must be
fulfilled:
1. The Alarm Output function must be selected;
2. In the Telemetry Port/Alarms setting, the Enabled option must be selected for GPO;
3. The GPO must be indicated in Notifications/GPO. Further details on alarms are available in
“Alarms” on page 28 .
In order for the GPO to be used as a ping watchdog output, you must select the relevant output
function and specify in the ping watchdog setting which GPO must be used.
For manual control of the GPO, select the relevant function. Set the required output status. You
can select a pulse type and start a pulse with the set duration. PLEASE NOTE that without a power
supply, the GPO is normally open, which can be interpreted as a false activation.