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The Control Module
2.12 The Control Module
The C304 Control Module is an addressable module that supervises and switches power to a Notification Appliance
Circuit. The C304 can be wired as NFPA Styles W, X, Y or Z Notification Appliance or Speaker Circuits. Alterna-
tively, the C304 module can be employed as a Form-C control relay.
C304 Control Module - Alarm Polarity
FIGURE 2-23:
Communications Loop Connections
Connect the MS-9200 Communications SLC loop to C304 Terminals 1(-) and 2(+). The C304 occupies one module
address on the loop. Set the rotary switches on the C304 to the particular loop address required.
NFPA Style W or Y Notification Appliance or Speaker Circuit
Connect polarized alarm notification appliances or speakers to a single 2-wire circuit. Note that this circuit cannot be
T-tapped or branched in any fashion and must be terminated across the last device by a 47K ohm, ½ watt ELR (P/N
A 2143-00). Connect the circuit to C304 Terminals 6(+) and 7(-). Refer to Figure 2-25 on page 43.
NFPA Style X or Z Notification Appliance or Speaker Circuit
Connect polarized alarm notification appliances or speakers to a single 4-wire circuit. Connect the circuit to C304
Terminals 6(+), 9(+), 7(-) and 8(-).
Note that when wiring Style Z, do not install an ELR since one is built into the C304 Control Module.
Notification Appliance Power
Connect notification appliance power from MS-9200 TB4 Terminal 1 to C304 Terminal 4 (+24 VDC) and MS-9200
TB4 Terminal 2 to C304 Terminal 3 (-24 VDC). This power must be supervised by a UL listed Power Supervision
Relay, wired as shown in Figure 2-25.
Coded Operation
Connect notification appliance power from either TB1 (NAC 1 Output) Terminals 1 and 4 or TB2 (NAC 2 Output)
Terminals 1 and 4 to C304 Control Module Terminals 3 and 4. Be certain to place one ELR across the last device on
the module for Style B wiring. Set NAC 1 or NAC 2, which is now being used to drive the C304, for appropriate
coded function. Refer to "System Edit" on page 61, for additional information.
Test Switch
The C304 Control Module includes a magnetic test switch sensor located near the center front of the module. Activa-
tion of this switch by test magnet P/N M02-04-00 will cause a short circuit indication for the Style W/X/Y/Z circuit
connected to the module.
-
Loop (-)
+
Loop (+)
-
24 VDC Power (-)
+
24 VDC Power (+)
Document #50428
+
Style X/Z (+)
-
Style X/Z (-)
C304
-
Style W/Y (-)
+
Style W/Y (+)
Rev. C1
2/15/99
P/N 50428:C1
41
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