FireLite SLC Wiring Manual — P/N 51309:R3 7/29/2019
45
Wiring a CMF-300 Module Control Modules
• A power supervision relay is required only on the last module of the power run.
• Do not T-tap or branch a Class B circuit.
• Terminate the circuit across the last device using an End-of-Line Resistor 47K, 1/2-watt,
P/N SSD A2143-00 (ELR-47K in Canada).
• Do not loop wiring under the screw terminals of any notification appliance. To maintain supervision, break the wire run at each
device.
6.3.2 Wiring a Class A NAC (Four-Wire) with Addressable Control Modules
A supervised and power-limited NFPA Class A NAC using a CMF-300 module. Polarized alarm notification appliances are shown con-
nected to the module in a four-wire configuration.
• 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.
• A power supervision relay is required only on the last module of the power run.
• Do not T-tap or branch a Class A circuit.
• Do not loop wiring under the screw terminals of any notification appliance. To maintain supervision, break the wire run at each
device.
CMF-300
NAC
24 VDC Nonresettable power
SLC
SLC-nacY.wmf
Note: Module polarities are shown in alarm condition
NOTE: A power
supervision relay is
required only on the
last module of the
power run.
ELR
47K, 1/2-watt
24 VDC Notification
Appliances
Figure 6.2 NFPA Class B Notification Appliance Circuit
NOTE: Refer to the Device Compatibility Document for compatible notification appliances and relays.
24 VDC
notification
appliances
CMF-300
NAC Out
24 VDC Nonresettable power
SLC
SLC-nacZtpH.wmf
NAC Return
Note: Module polarities are shown in alarm condition.
NOTE: A power supervision relay is required only
on the last module of the power.
Figure 6.3 NFPA Class A Notification Appliance Circuit
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