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
SL
C-n
a
c
Y.
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
S
L
C
-na
cZtpH.wm
f
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