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Installation of Optional Modules
2.6.1.2 Wiring NACs and IDCs for Class A
Wire the Style Z (Class A) Notification Appliance Circuits using TB5 of the FACP main circuit
board and TB2 of the CAC-5X module. Wire the Style D (Class A) Initiating Device Circuits
using TB4 of the FACP main circuit board and TB1 of the CAC-5X. Note that the wiring will
be identical when using TB7 NAC and TB6 IDC of the FACP. Make certain to observe polarity
when connecting the devices to the circuits. The B+ and A+ terminals must comprise the feed
and return for the positive side of a device and the B- and A- terminals must comprise the feed
and return for the negative side of a device. To configure any of the zones for Class B when the
CAC-5X is installed, simply wire to the B+ and B- input on the FACP terminal(s) and install the
End-of-Line Resistor after the last device on the circuit. Do not wire to the corresponding A+
and A- terminals on the CAC-5X module.
Class B (Style B) IDC - 4.7 K
½ watt ELR resistor
P/N:71252 (supervised and power-limited)
Class A (Style Z) NAC
(supervised and power-limited)
Polarized
Bell
Polarized
Strobe
Polarized
Horn
Circuit polarities
shown in alarm
condition
B+
B-
MRP-2002 & MRP-2002E PN 53049:A1 5/01/2008
Ω
Smoke
Pull Station
Heat
B+ B- B+ B- B+ B- B+ B- B+ B-
B+
B-
A+
A-
A+
A-
A+ A- A+ A- A+ A- A+ A- A+ A-
CAC-5X Class A Converter Module
Figure 2.12 Wiring NACs and IDCs for Class A Operation
Class A (Style D) IDC
(supervised and power-limited)
Smoke
Pull Station
Heat
Installation
Dummy load all unused
Ω
circuits - 4.7 K
½ watt resistor
(P/N: 71245)
FACP Main
Circuit Board
27
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