Because the maximum transmitter output level is -7 dB, and the maximum receiver input level is -10 dB, the receiver may be overdriven on a short link and may require a 3 dB attenuator. Connector allowances for the transmitter and receiver are included in the above power declaration.
When using a Control Module as a Notification Appliance Circuit (NAC), the isolation described in the section titled Section 4, “SLC
Circuits with Isolators” which begins on page 22, is required or Riser Conductors must be installed in accordance with the survivability
from attack by fire requirements in National Fire Alarm Code, NFPA 72.
6.1 Description
The CMF-300 and CMF-300-6 modules are addressable modules that can be used for monitoring and switching 24 VDC Notification
Appliance Circuit (NAC) power for NFPA Class B and NFPA Class A circuits.
Ratings for the relay contacts on the module are:
6.2 CMF-300 Installation
6.2.1 Setting an SLC address for a CMF-300 Module
Each module is factory preset with an address of “00”. To set an SLC address refer to “Setting an SLC address for a Single Point Module” on page 33.
6.2.2 Wiring a Notification Appliance Circuit (NAC) with a CMF-300
The figure below shows the connections to wire a module for powering a 24 VDC NAC:
6.3 Wiring a CMF-300 Module
This section contains instructions and diagrams for wiring a Signaling Line Circuit with a CMF-300 as a Notification Appliance Circuit
(NAC).
6.3.1 Wiring a Class B NAC (Two-Wire) with Addressable Control Modules
A supervised and power-limited NFPA Class B NAC using a CMF-300 module. Polarized alarm notification appliances are shown connected to the module in a two-wire configuration. Refer to the Device Compatibility Document for compatible notification appliances
and relays.
• See “Power Considerations” on page 63 for information on monitoring 24 VDC power.
• Each module can control 2 amps of resistive load (on electronic devices) or 1 amp of inductive load (on mechanical bells and
horns).
• 24 VDC power must be provided from a UL listed power supply for fire protection use.
Load Description Application Maximum Voltage Current Rating
Resistive Non-Coded 30 VDC 3.0 A
Resistive Coded 30 VDC 2.0 A
Resistive Non-Coded 110 VDC 0.9 A
Resistive Non-Coded 125 VAC (CMF-300)
70.7 VAC (CMF-300-6)
0.9 A
Inductive (L/R = 5ms) Coded 30 VDC 0.5 A
Inductive (L/R = 2ms) Coded 30 VDC 1.0 A
Inductive (PF = 0.35) Non-Coded 125 VAC (CMF-300)
70.7 VAC (CMF-300-6)
