Wiring a Signaling Line Circuit (SLC)
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AFP-300/AFP-400 Installation PN 50253:C1 05/22/97 2-55
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Install a CMX module as a Form-C relay by following the instructions in Table 2-22:
Table 2-22 Installing a CMX Module as a Form-C Relay
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This section contains instructions and wiring diagrams for wiring a CMX as an NAC.
Table 2-23 lists the applications for wiring a CMX in an SLC:
Table 2-23 Applications for SLC Wiring with CMX Modules
Step Action
1 Configure a CMX as a Form-C relay by using a needle-nose pliers to break off
the two tabs (J1 and J2):
2 Connect the SLC from the CPU to CMX terminals 1 (–) and 2 (+) as shown in
Figure 2-74.
3 Set the rotary switches on the CMX to the required SLC address. (The CMX
takes one module address on the SLC.)
4 Wire the common and the normally-open or normally-closed contacts to the
CMX (Figure 2-74).
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CMX Function Description Refer to...
NFPA Style Y NAC
(two-wire)
Polarized alarm notification
appliances connected to a
two-wire circuit.
Figure 2-75
NFPA Style Z NAC
(four-wire)
Polarized alarm notification
appliances connected to a four-
wire circuit.
Figure 2-76
Notification Appliance
Power
Method 1 – Notification
appliance power to CMX
terminal 3 (common) and
terminal 4 (+24 VDC).
Method 2 – An alternate power
arrangement where you power
the CMX (terminals 3 and 4)
from one of the NACs on the
MPS-400.
Figure 2-77
Figure 2-78
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