Wiring Nacs And Idcs For Class A - Fire-Lite Alarms MRP-2001E Installation, Operation, And Programming Manual

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
Ferrite Bead
P/N 29150
Circuit polarities
shown in alarm
condition
B+ B-
Large gauge wire should be looped through
bead at least once as illustrated. Smaller
gauge wire can be looped more often.
MRP-2001 & MRP-2001E PN 53040:A 4/16/2007
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
Ferrite Bead in open position
Figure 2.12 Wiring NACs and IDCs for Class A Operation
Class A (Style D) IDC
(supervised and power-limited)
Smoke
Pull Station
Heat
Ferrite Bead in closed position
Installation
Dummy load all unused
Ω
circuits - 4.7 K
½ watt ELR resistor
(P/N: 71245)
FACP Main
Circuit Board
27