TM204
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Issue 1.1
5.5.2
Igniting Actuator Wiring
A maximum of four igniting actuators can be wired in series. If only one or two actuators are fitted, a 2R2,
2.5 Watt resistor must be wired in series with them to provide the correct monitoring resistance. The end
of line diode can be discarded when igniting actuators are used.
To guarantee firing under all conditions, the total resistance of actuators, monitoring resistor and cable
should not exceed 7 ohms.
5.5.3
Setting up Extinguishing Monitoring Circuit
The extinguishing output circuit is factory set to monitor the end of line diode that is fitted to the terminals
and will normally show a value of around 270.
If the parameters of the extinguishing output change e.g. by connecting a solenoid in parallel with the
monitoring diode or removing the diode and fitting igniting actuators, then the extinguishing output
monitoring level will need to be “learnt”. See section 7.2.16 for details.
To do this, operate the ENABLE
CONTROL keyswitch to put the system into Access Level 2.
The LCD will show:
Operate the WRITE ENABLE switch on the extinguishing module by gently sliding it to the left. The LCD
will show:
+
-
M
M
M
3 OR 4 ACTUATORS
WIRED IN SERIES
(MAXIMUM OF 4)
E
X
T
IN
G
1 OR 2 ACTUATORS
WIRED IN SERIES
+
-
E
X
T
IN
G
M
M
M
FIT 2R2 2.5W RESISTOR
IN SERIES WITH
ACTUATORS IF ONLY 1 OR
2 ACTUATORS ARE USED
