Specifications

Page 16
EN54 FIREFINDER PLUS INSTALLATION,COMMISSIONING & OPERATION
4.8.4 Monitored Outputs
Four independently monitored and controlled outputs (TB7) are provided and can be configured for a
variety of uses.
 Sounder - activated when any of its four sounder groups is active. (EN54-2 Clause 7.7 and
7.8). The output is turned off during an Alarm (sounder) disable or Alarm (sounder) silence
condition.
 ASE – (Australia Firefinder Plus Only)
 Fire / FARE – activated by alarm condition (EN54-2 Clause 7.7 and 7.9.1). The output is
turned off during a FARE disable condition.
 AUX / ANC - activated on device alarm conditions. The AUX/ANC Output is turned off during
an Auxiliary disable condition.
 EWIS - activated on evacuation and device alarm conditions. The output is turned off during
an Alarm (sounder) disable or Alarm (sounder) silence condition.
 Fault - activated on all fault conditions (EN54-2 Clause 8.9). The output is turned off during
a FWRE disable condition.
 General Purpose – activated via the Configmanager “Function” programmed logic.
These monitored switched outputs, supply a nominal 24VDC, at up to 1 Amperes. Monitoring is for
short, open and earth faults when the output is OFF.
The outputs have been designed to operate with a programmable EOL of 3K3Ω, 10KΩ 22KΩ or
Unmonitored (no EOL) the 10K EOL is the default.
Line Impedance (10K EOL)
Reported Condition
0Ω– 50Ω
Short circuit Fault
50Ω – 150Ω
Indeterminate: Maybe reported as shorted or normal
150Ω – 15KΩ
Normal
15KΩ – 40KΩ
Indeterminate: Maybe reported as normal or open circuit
40KΩ to ∞
Open circuit Fault
Warning systems such as the EV20 and EV40 and sounders are connected to the Brigade / PSU
Monitor Board as shown below. If more sounders are required, the Sounder / Bell Control Board
(302-7420) must be used.
Sounder
TB7
EOL
10K
Ohms
1+ 1-
TB7 Location
+ / - are monitored 1A outputs
Un-used O/P's must be terminated in
10K Ohms EOL
Note: If a diode is NOT fitted internally to a bell / sounder
a diode MUST be fitted as shown - fit 1N4004 or similar
EOL
10K
Ohms
N1236
2+ 2-
3+ 3- 4+ 4-
Bell
Warning System
Figure 14 Connecting a Bell / Sounders