Initiating Device Circuits
2. Installation
MS-4412B/MS-4424B Instruction Manual PN 15125:G1 10/22/02
17
Initiating Device Circuits
The control panel provides four Style B (ClassB) Initiating Device Circuits.
Circuit #4 may be converted to a Supervisory Circuit by setting DIP switch #3 to the ‘on’ position (see
"Setting Mode of Operation" on page 27).
Initiating devices include: Heat, Photoelectric and Ionization type detectors, Manual Pull Stations and
Waterflow alarm devices.
Note:
Refer to the Device Compatibility Document for compatible devices.
• Wire all alarm initiating devices sequentially for proper supervision.
• Observe polarity when connecting polarized devices.
• All circuits are supervised and power-limited.
• Leave dummy load resistor (provided) on all unused circuits.
Figure 6 Initiating Device Circuits
TB4
IN #2
B+ B–
IN #3
B+ B–
IN #4
B+ B–
24 Volt -
4.7K, 1/2-Watt resistor PN 71252
(UL listed)
12 Volt -
2.2K, 1/2-Watt resistor PN R-2.2K
(UL listed)
Style B (Class B)
Initiating Device
Circuits
Two-wire
Smoke
Detector
Manual
Pull Station
Style B (Class B)
Supervisory Circuit
(If DIP switch SW1-3
is “ON”)
Normally Open
Tamper Switch
MS44
B-idc.cd
r
Note:
Silk screen printing on circuit board moved to bottom for clarity
