RTK Series UC625 Annunciator
57
Symptom
Probable Cause
After a short period of
time the alarms revert to
the acknowledged state
even though the
acknowledge pushbutton
has not been pressed.
All UC625 annunciators are equipped with an automatic acknowledge
timer facility typically used during commissioning or in un-manned
applications.
The common SPR card is equipped with switches that allow the user to
set a defined time period of 15 Sec, 50 Sec or 170 Sec.
This timer circuit can be disabled if required
Please refer to Section 10 Para 10.7 for full details
When an alarm occurs
the common alarm relay
does not operate
All UC625 units are equipped with a common alarm relay, which changes
state when any alarm occurs on the unit.
Each pair of channels can be set to operate the common alarm relay if
required using switches mounted on the Alarm Card
Channel 1 & 2
SW4 Position 1 ON = Enable common alarm signal
SW4 Position 1 OFF = Disable Common alarm signal
Channel 3 & 4
SW6 Position 1 ON = Enable common alarm signal
SW6 Position 1 OFF = Disable Common alarm signal
The Common alarm relay can also be set to follow the signal input or
follow the alarm logic.
Please refer to Section 10 Para 10.4 for full details
The common alarm relay
activates when I get one
alarm but if another alarm
occurs the relay remains
in the alarm state
All UC625 units are equipped with switches that allow the user to select if
the common alarm relay should reflash every time a new alarm occurs
causing the contacts to drop out and re-activate typically within 500mS.
Switches are provided on the Alarm Card to control this feature
Channel 1 & 2
SW4 Position 5 ON = Enable Reflash
SW4 Position 5 OFF = Disable Reflash
Channel 3 & 4
SW6 Position 5 ON = Enable Reflash
SW6 Position 5 OFF = Disable Reflash
