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2.5.5
Auxiliary Power Supply Output
Figure 2-8. Auxiliary Power Supply Output Connection
2.5.6
Trouble Relay
The 15073 board has a Form C trouble relay built into terminals 7-9 of TB2. The trouble relay will de-
energize under a trouble condition.
A typical application of the trouble relay is to connect the 15073 normally closed (N.C.) contacts in series
with an EOL of a spare IDC or NAC or monitor input from a fire alarm control unit. This will cause a
trouble on the fire alarm control unit when the 15073 opens its trouble contacts.
Note:
The N.C. contact is the relay contact that is closed when the 15073 has power and there are no
trouble conditions.
Input 1
1
2
3
TROUBLE
RELAY CONTACT
(SHOWN IN NORMAL
STANDBY CONDITION)
5A @ 30VDC/VAC,
RESISTIVE FOR POWER
LIMITED SOURCE
UNSUPERVISED
Figure 2-9. Trouble Relay Connection Example
447179 Issue 1 Rev. A
AUXILLIARY POWER OUTPUT
3A MAX. @ 24VDC NOMINAL
UNSUPERVISED, POWER LIMITED
Trouble
Input 2
NAC
Relay
4
5
6
7
8
9
10 11
N.C.
COM
N.O.
INITIATING CIRCUIT
IDC EOL
(SEE CONTROL UNIT
INSTALLATION INSTRUCTIONS)
firealarmresources.com
12
CONTROL UNIT
IDC
CONNECTION
+
-
15073 OWNER'S MANUAL
13
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