Johnson Controls MPS-24A - Typical NFPA Style B Initiating Device Circuit

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Installation—Installing the FC-2000 35

Figure 26: NFPA Style B Field Wiring of the IZM-8 Initiating Zone Module

Notes:

1. Initiating device circuits are supervised, power limited, and may be

connected to limited-energy cable. Initiating devices include

non-coded manual pull stations, heat detectors, photo and ion

detectors, and waterflow alarm and waterflow supervisory devices.

Connect waterflow alarm devices to a dedicated circuit programmed

for the waterflow option. Connect N.O. waterflow supervisory

devices to a dedicated zone programmed for supervisory operation.

Terminal Block will accept 12 to 22 AWG wire. Initiating circuit

current will ensure alarming of one 2-wire detector only.

Typical NFPA

Style B Initiating

Device Circuit

IZB

b+b- b+b- b+b- b+b-

A B C D E F G H

b+b- b+b- b+b- b+b-

nfpa-b

4.7K, 1/2 watt ELR, Part No. 71252 (Note 5).

Dummy load all

unused circuits with

4.7K, ELR,

Part No. 71245.

1 2 3 4 5 6 7 8

B+ B-

1 2 3 4 5 6 7 8

B+ B-

UL Listed 2-wire Smoke Detector (Note 2)

Manual Pull Station

Heat Detector

Typical NFPA Style B

Initiating Device Circuit

PUS H IN

THEN

PULL DOW N

FIRE

INITIATING

ZONE

RED-ALARM

YELLO W- TRO UBLE

DISPL AY PRO GRAM

MODULE

TYPE

LAMPS

SWITCH