Honeywell MS-2 Manual Do Utilizador
Installation
Installation of Optional Modules
26
MS-2/MS-4 PN 51512:E 01/18/05
2.6.1.2 Wiring NACs and IDCs for Class A
Wire the Style Z (Class A) Notification Appliance Circuits using TB2 of the MS-4
and TB1 of the CAC-4 module. Wire the Style D (Class A) Initiating Device
Circuits using TB3 of the MS-4 and TB1 of the CAC-4. 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-4 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-4 module. Note that Zone 1 IDC on the MS-2 and Zone 2
IDC on the MS-4 can be configured as a combination waterflow/supervisory circuit
as illustrated in the following figure.
Wire the Style Z (Class A) Notification Appliance Circuits using TB2 of the MS-4
and TB1 of the CAC-4 module. Wire the Style D (Class A) Initiating Device
Circuits using TB3 of the MS-4 and TB1 of the CAC-4. 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-4 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-4 module. Note that Zone 1 IDC on the MS-2 and Zone 2
IDC on the MS-4 can be configured as a combination waterflow/supervisory circuit
as illustrated in the following figure.
TB
3
3
TB
2
2
B+ B- B+ B-
NAC 1 NAC 2
B+ B- B+ B-
ZONE 1 ZONE 2
ZONE 1 ZONE 2
B+ B- B+ B-
ZONE 3 ZONE 4
TB
1
A+ A- A+ A-
NAC 1 NAC 2
CLASS A CLASS A
A+ A- A+ A-
ZONE 1 ZONE 2
CLASS A CLASS A
A+ A- A+ A-
ZONE 3 ZONE 4
CLASS A CLASS A
Figure 2.11 Wiring NACs and IDCs for Class A Operation
CAC-4 Class A Converter Module
MS-4
Circuit Board
Class B (Style B)
IDC - 4.7 K
Ω
½ watt ELR
resistor
P/N:71252
(supervised and
power-limited)
Dummy load all unused
circuits - 4.7 K
circuits - 4.7 K
Ω
½ watt ELR resistor
(P/N: 71245)
(P/N: 71245)
Polarized
Bell
Circuit polarities
shown in alarm
condition
shown in alarm
condition
Class A (Style Z) NAC
(supervised and power-limited)
Class A
(Style D) IDC
(supervised and
power-limited)
Class A
(Style D) IDC
Combo Waterflow
& Supervisory
20K
Ω, ½ watt ELR
resistor P/N:75477
(supervised and
power-limited)
1.2 K
Ω
½ watt
In-Line
resistor
P/N:75579
Polarized
Strobe
Polarized
Horn
Tamper
Tamper
Waterflow
Smoke
Smoke
Pull Station
Pull Station
Heat
Heat
IMPORTANT!
All devices must be
within 20 feet of the
within 20 feet of the
Class A portion of
the circuit and
wiring must be in
conduit.
ms
4c
omba.cdr