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24 vdc circuit – Fire-Lite ACM-32AF Annunciator Modules User Manual

Page 26

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4. Installation

Wiring and Connecting

26

ACM-16ATF/ACM-32AF Manual PN 51480:A0 02/02/01

24 VDC Circuit

CAUTION: Power must be turned off when connecting the 24 VDC
power to the annunciator to avoid damaging the equipment.

Connect the 24 VDC annunciator wiring to the removable terminal blocks
as illustrated below:

• Power must be filtered, non-resettable, and power-limited.

• A Power Supervision Relay is not needed because the annunciator is

inherently supervised by the control panel (loss of EIA-485
communication is registered at the control panel during loss of power
to the annunciator).

• The power can be supplied by the FACP or a remote power supply listed

for fire protective signaling use.

• Connect Earth Ground to a mounting screw on the backbox or cabinet.

Figure 6 Connecting 24 VDC Wiring to Terminal Blocks

!

– +

-

-

+

+

-

-

+

+

-

-

+

+

N/C Trouble Input
N/C Trouble Input
Common In
Common Out
Power In
Power Out
Earth Ground

TB1 on Last Annunciator

ACS_

p

w

r.

c

d

r

24 VDC

Power

TB1

TB1

N/C Trouble Input
N/C Trouble Input
Common In
Common Out
Power In
Power Out
Earth Ground

N/C Trouble Input
N/C Trouble Input
Common In
Common Out
Power In
Power Out
Earth Ground

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