Chapter 1: Installation and wiring
P/N 3102352-EN • REV 005 • ISS 28DEC18 29
CTM module wiring
The City Tie Module (CTM) is an interface between the control panel notification appliance
circuit and a master box. It provides off-premises signal transmission for systems that must
comply with NFPA requirements for Auxiliary Protective Systems. The CTM activates a local
energy fire alarm box. For detailed information and wiring, refer to CTM City Tie Module
Installation Sheet (P/N 3101025-EN).
Requirements
When connecting a CTM to the panel, the following hardware and programming requirements
must be met:
• The CTM must be connected to either a panel NAC, or a NAC module
• The NAC used must be dedicated to CTM use only
• All alarm points or zones (if programmed as a zoned system) must be programmed to
activate the dedicated NAC
• The NAC used must be programmed as City Tie
Wiring
The following wiring diagrams show how the polarity switches during an alarm condition.
Figure 39: CTM module wiring (panel in normal condition)
2) 200 mA into a 14.5 Ω trip coil max. loop
resistance = 25 Ω
This circuit is nonpower-limited and is supervised
for grounds and opens, but not shorts
Master box
(5) Public fire alarm reporting system
(6) 15 kΩ end-of-line resistor
(7) CTM must be mounted in the same room
as the panel
(8) Supervised and power-limited
(9) Notification appliance circuit (NAC)
(10) NAC must be programmed for city tie
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