Wiring Nacs And Idcs For Class A - Honeywell MS-5UD Series Manual

2.7.1.2 Wiring NACs and IDCs for Class A

Wire the Style Z (Class A) Notification Appliance Circuits using TB5 of the MS-5UD/MS-
10UD and TB2 of the CAC-5X module. Wire the Style D (Class A) Initiating Device Circuits
using TB4 of the MS-5UD/MS-10UD and TB1 of the CAC-5X. Note that the wiring will be
identical when using TB7 NAC and TB6 IDC of the MS-10UD. 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-
Figure 2.15 Wiring NACs and IDCs for Class A Operation
MS-5UD/MS-10UD Series PN 52626:B 8/01/2008
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
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)
MS-5UD
Circuit Board
35