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ZONESENSE EN54
INSTALLATION COMMISSIONING & OPERATION
If the Alert input is ON, Class Change input is OFF, there are no zones in
alarm and the front panel evacuate control is not active then the alarm outputs will pulse at the
rate of 1sec ON and sec OFF.
The Alarm outputs can be disabled by using the front panel control. Once disabled, the outputs
will remain off until they are re-enabled. A front panel indicator associated with the output is
illuminated when these outputs are disabled.
6.6
Outputs
– Open Collector (TB4)
There are four unmonitored open collector type outputs. Each output is capable of switching
40mA of output current and withstand a short circuit condition to the common +24VDC output
without damage.
Note:
The 24VDC feed is current limited to 170ma by a PTC and monitored at the
terminal block. If there is an over current situation, then the PTC will activate and a fault will be
reported at the FACP
REM
TB4
FLT
15 Sec
Reset
Pulse
+24v / 100mA
0v
CN3
CN2
F
IR
E
F
A
U
LT
/D
IS
A
B
L
E
D
/T
E
S
T
BACK EMF
PROTECTION DIODE
ANC
AUX +
RST
Figure 13: TB4 Remote, Fault, Ancillary Reset, Auxiliary Output Terminations, Reset Pulse & Location on
the Main Control Card
6.7
Remote Output
– (TB4/1)
The operation of this output is identical to the operation of the remote output relay.
6.8
Fault Output
– (TB4/2)
The operation of this output is identical to the operation of the fault output relay.
Note:
This output will be normally energised, and de-energised to signify a fault
condition.
6.9
Ancillary Output
– (TB4/3)
Ancillary Output is a un-monitored open collector output activated when any of the zones report
an alarm condition. The activation of this output is subject to any delays that may be configured.
This output can be disabled by using the front panel controls. Once disabled the output will
remain off until it is re-enabled. The ANCILLARY OUPUT front panel indicator is illuminated when
this output is disabled.
6.10 Reset
– (TB4/4)
Reset is a non-monitored open collector output activated for 15sec with the FACP reset.
6.11 Auxiliary Power Output
– (TB4/5)
This +24VDC output with an associated return is monitored at the terminal block and current
limited to 150mA @ 24VDC by a PTC. If an over current situation occurs fault will be indicated.
6.12 Outputs
– Volt Free Relay (TB5)
There are two voltage free relay outputs, the Remote output, and the Fault output.
6.12.1 Remote Output Relay
The Remote Output Relay has 1A 30VDC unmonitored voltage free single change over contacts
that are activated when any zone circuit reports an alarm condition. The front panel indicator
“Remote Output On” is illuminated when the output is activated and is reset via the front panel
reset control.
