Patol Limited
5. OPERATION
5.1 Normal
Relay Mode:- Fault relay energized. Fire relay de-energized.
LP Mode:- End of line resistor connected across trigger circuit.
5.2 Alarm Condition
An Alarm condition will occur on abnormal Infra-red detection by the Sensor Head.
Normally this status will Latch On, however in special configurations the condition can be
set to momentary operation - auto resetting after a selected delay.
During the ALARM :-
Either or both internal red LED indicators illuminated.
Relay Mode:- Fire relay energized.
LP Mode:- Alarm resistor switched across trigger circuit.
5.3 Reset
Latched Alarm conditions may be normalized by :-
Momentary interruption of the supply - less than 7V.
When directly connected to a Fire Panel via a trigger circuit or addressable loop
interface this condition will occur on fire panel reset operation.
A local or remote normally closed push-button may also be implemented.
Operation of the internal Reset push-button.
5.4 Fault
Warning
Relay Mode:- Fault relay de-energized
LP Mode:- End of line resistor disconnected from trigger circuit.
A fault warning may occur for any of the following:-
Low / failed supply.
Supply less than 20V in Relay Mode.
Supply less than 13V in LP Mode. (Note:- An Alarm will remain latched below the fault
threshold so long as the Reset voltage is not reached.)
Unit internal power regulation circuit fault.
The output will automatically normalize on rectification of the fault.
5.5 Test
Operation of the sensor’s internal Test push-button simulates an alarm as per 5.2.
A remote test push-button has identical result if implemented.
Page 15 of 16
D1198 - Issue 1 - 25 September 2013
Series 5000 - Manual 5610