The Edwards CTM is a City Tie Module for fire alarm panels. Specifically, it provides a single municipal box connection for activating a local-energy master box. As a result, the fire alarm system can transmit off-premises signals to a public fire alarm reporting system.
This module satisfies NFPA requirements for Auxiliary Protective Systems. Therefore it bridges the fire alarm control panel and the municipal master box. Furthermore, it operates on a dedicated notification appliance circuit (NAC).
Edwards CTM Function
The CTM activates a local-energy fire alarm box via a 24 Vdc trip signal. In addition, the trip current is 200 mA into a 14.5 Ω trip coil. Specifically, the wire resistance to the master box must not exceed 26 Ω. Also, the CTM must be wired to a dedicated NAC – no other notification appliances on the same circuit.
Specifications
- Voltage: 24 Vdc nominal
- Standby current: 20 mA
- Alarm current: 300 mA maximum
- Ground fault impedance: 0 Ω
- Wire size: 12 to 18 AWG (0.75 to 2.5 sq mm)
- Municipal box wire resistance: 26 Ω maximum
- Trip current: 200 mA into a 14.5 Ω coil
- Operating temperature: 32 to 120 °F (0 to 49 °C)
- Relative humidity: 0 to 93% non-condensing
Mounting
The CTM mounts in a North American 2-1/2 in (64 mm) deep 1-gang electrical box. Therefore the install footprint is small. Furthermore, a 4-24 × 1/2 in self-tapping screw and two 6-32 × 1/2 in machine screws are supplied for assembly.
Application Notes
Install the CTM in accordance with NFPA 70 National Electrical Code. Specifically, the NAC output signal must be compatible with the input rating of the local-energy master box. Also, the EOLR value must match the NAC requirement. As a result, the CTM provides a code-compliant municipal-box connection.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.2 lbs |
|---|---|
| Dimensions | 5 × 3 × 2 in |
| Condition | New |
| Manufacturers | Edwards |
| Part Type | Annunciator |
