Fire-Lite ACM-32AF Annunciator Modules - Manual (Page 23)

ACM-16ATF/ACM-32AF Manual PN 51480:A0 02/02/01
23
4. Installation
This section provides detailed instructions for installing and wiring
annunciator modules and expander modules.
Note: For wiring & programming details that are unique to a specific fire alarm
control panel, refer to that panel's appendix in this manual, and to the panel's
Instruction Manual.
Mounting the Backbox or Cabinet
Select appropriate knockout(s) on the enclosure for your wiring to run
through and snap it out.
Fasten the cabinet or backbox to the wall.
Ground the enclosure to a solid metallic ground, such as a grounded cold
water pipe.
Wiring and Connecting
Follow these guidelines when wiring and connecting the annunciator
circuit(s):
• The EIA-485 circuit must be wired using a twisted-shielded pair cable
having a Characteristic Impedance of 120 ohms, +/- 20%.
• Terminate the EIA-485 shield at the Fire Alarm Control Panel only.
• Do not run cable adjacent to, or in the same conduit as, 120-volt AC
service, noisy electrical circuits that are powering mechanical bells or
horns, audio circuits above 25 Vrms, motor control circuits, or SCR
power circuits.
• All enclosures, including the FACP backbox, must be connected to
earth ground.
• Never use the shield for grounding purposes.