Wiring a Signaling Line Circuit (SLC) Installation
IQ-301 PN 50036:F 10/29/2001 57
Installing a Relay Module
Install a relay module by following the instructions below:
1. Connect the SLC from the CPU to relay module terminals 1 (-) and 2 (+) as shown
in Figure 39.
2. Set the rotary switches on the relay module to the required SLC address. (The
FRM-1 takes one module address on the SLC. Refer to 2.9.6 “Setting an SLC
Address for a Module” for instructions on addressing the modules.)
3. Wire the common and the normally-open or normally-closed contacts to the relay
module (Figure 39).
2.9.12 SLC Wiring with Control Modules
This section contains instructions and wiring diagrams for wiring a control module to
polarized alarm notification appliances. Figure 40 provides a diagram for two-wire
appliances wired according to NFPA Style Y NAC. Figure 41 provides a diagram for
four-wire appliances wired according to NFPA Style Z.
Style Y NAC Circuits (Two-wire)
Figure 40 shows a supervised and power-limited NFPA Style Y NAC using a control
module. This shows polarized alarm notification appliances connected to control
modules in a two-wire configuration. A control module can control 2 A of resistive load
(on electronic devices) or 1 A of inductive load (on mechanical bells and horns). If
installing more than one control module NAC, install the power supervision relay on
the 24 VDC power bus after the last control module.
Refer to Device Compatibility
Document for compatible
notification appliances and
relays.
• Do not T-Tap or branch a Style Y circuit.
• Terminate the circuit across the last device using a 47K, 1/2-watt ELR
(PN ELR-47K).
• Do not run wiring under any terminals. To maintain supervision, break the wire
run.
Wiring Diagram and Instructions
Connect the NAC as follows:
1. Connect the SLC to FCM-1 terminals 1 (–) and 2 (+).
2. Connect 24 VDC power (Figure 40).
3. Set the control module rotary switches to the required SLC address. (The control
module takes one module address on the SLC.) Refer to 2.9.6 “Setting an SLC
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