Johnson Controls, Inc. SLC Wiring Manual — P/N 51870:G 04/23/2009 43
Wiring a Style Y NAC (Two-Wire) with Addressable Control Modules Control Modules
7.3 Wiring a Style Y NAC (Two-Wire) with Addressable
Control Modules
A supervised and power-limited NFPA Style Y (Class B) Notification Appliance Circuit (NAC)
using the M300CJ module. Polarized alarm notification appliances are shown connected to the
module in a two-wire configuration.
1. See “Power Considerations” on page 53 for information on monitoring 24 VDC power.
2. Each module can control 2 amps of resistive load (on electronic devices) or 1 amp of inductive
load (on mechanical bells and horns).
3. A power supervision relay is required only on the last module of the power run.
(IFC-3030 only: If using one of the IFC-3030’s FlashScan type IDs that provide built-in power
supervision, no relay is required.)
4. Do not Tap or branch a Style Y circuit.
5. Terminate the circuit across the last device using a UL-listed End-of-Line Resistor 47K,
1/2-watt, SSD P/N A2143-00 (ELR-47K in Canada).
6. Do not loop wiring under the screw terminals of any notification appliance. To maintain
supervision, break the wire run at each device.
7. Refer to Device Compatibility Document for compatible notification appliances and relays.
Figure 7.4 NFPA Style Y Notification Appliance Circuit
NAC
24 VDC Nonresettable power
SLC
SLC-nacY.wmf
Module polarities are shown in alarm condition
A power supervision
relay is required only on
the last module of the
power run. (only: If
using one of the’s
FlashScan type IDs that
provide built-in power
supervision, no relay is
required.)
ELR
47K, 1/2-watt
24 VDC Notification
Appliances
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