Edwards Signaling CTM User Manual

CTM City Tie Module Installation Sheet

Wiring

Wire the CTM to a dedicated notification appliance circuit
(NAC) as in Figure 1 on page 2. Do not install other notification

21

1234

Description

The CTM City Tie Module provides a single municipal box
connection for activating a local energy type master box
connected to a public fire alarm reporting system.

Installation

Install the CTM in accordance with NFPA 70 National Electrical
Code.

appliances on the same circuit.

Specifications

Voltage 24 VDC nom.

Current
Standby
Alarm

Ground fault impedance 0 

Wire size 12 to 18 AWG (0.75 to 2.5 sq mm)

Mounting North American 2-1/2 in (64 mm) deep

Municipal box connection
Wire resistance:
Trip current:

Operating environment
Temperature
Relative humidity

20 mA
300 mA, max.

1-gang box

26 
200 mA into a 14.5  coil

32 to 120°F (0 to 49°C)
0 to 93% noncondensing

WARNING: This device will not operate without electrical

power. As fires frequently cause power interruptions, we
suggest you discuss further safeguards with your fire
protection specialist.

The CTM is shipped from the factory as an assembled unit; it
contains no user-serviceable parts and should not be
disassembled.

For more information, refer to the technical reference manual
listed inside the control panel door.

To install the module:

1. Verify that all field wiring is free of opens, shorts, and
ground faults.

2. Make all wiring connections as shown in the wiring
diagram. See Figure 1.

4. Using the 4-24 × 1/2 in (13 mm) self-tapping screw
provided, mount the wall plate to the module.

5. Using the two 6-32 × 1/2 in (13 mm) machine screws
provided, mount the module to the electrical box.

© 2013 UTC Fire & Security. All rights reserved. 1 / 2 P/N 3101025 • REV 02 • REB 25JAN13

Figure 1: CTM installation wiring diagram

From dedicat ed notif ication
appliance circuit [ 4]

Compatible electrical box

CTM

Ac t i veNor ma l

–

+

+

–

[1]

21

Local energy t ype

1234

master box

Ac t i veNor ma l

EOLR [ 3 ]

–

+

+

–

14.5 
trip coil

[2]

Publi c fi re alarm

report ing system

Wall plat e

Sc r e w s

[1] Power-limited and supervised for opens, shorts, and ground faults

[2] Nonpower-limited and supervised for opens and ground faults

only. 26 , max. 4.4 A, max.

[3] Use end-of-line resistor value required by the notification

appliance circuit

[4] NAC output signal must be compatible with the input rating of the

local energy type master box.

2 / 2 P/N 3101025 • REV 02 • REB 25JAN13