Section 3 Installation Initiating Device Circuits with IZM-8RK/IZE-A
28 NFS-3030 Installation PN 51330:C 10/28/2003
3.8.2 Style D Field Wiring
Figure 14 Style D Field Wiring of IZM-8RK Initiating Zone Module with IZE-A Expander
1. Initiating Device Circuits are supervised, power-limited and may be connected to limited-energy
cable. Initiating devices include non-coded manual pull station, heat detectors, photo and ion
detectors, waterflow alarm and waterflow supervisory devices. Connect waterflow alarm devices to
a dedicated circuit, programmed for waterflow option. Connect N.O. waterflow supervisory
devices to a dedicated zone programmed for supervisory operation. The terminal blocks will accept
12AWG to 22AWG wire. Initiating circuit current will ensure alarming of one two-wire detector
only.
2. Use only the compatible, UL/ULC-listed two-wire smoke detectors that are listed in the Device
Compatibility Document.
3. For connection of 4-wire smoke detectors and initiating devices requiring separate 24 VDC power,
refer to your power supply manual and to the wiring diagrams shipped with your devices.
4. Wire initiating devices according to the manufacturer's instructions packaged with each device.
5. Maximum line resistance due to wiring is 100 ohms.
UL/ULC-listed two-wire smoke detector.
2
Manual Pull Station
Heat Detector
Jumper all
unused circuits
as shown
Typical NFPA Style D Initiating Device Circuit
!
WARNING: Do not mix fire alarm points
with non-fire alarm points on the same
IZM-8RK/IZE-A Initiation Zone Module.
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