Input Circuits - Honeywell MS-5UD Series Manual

2.3 Input Circuits

The MS-5UD has five IDCs (Initiating Device Circuits) and the MS-10UD has ten IDCs. Each
circuit is compatible with System Sensor's i
when the detector becomes dirty and a separate supervisory 'freeze' signal when ambient
temperature falls below the detector rating of approximately 45
limit for each IDC is 100 ohms. The field wiring for each zone is supervised for opens, shorts and
ground faults. All conditions are visually and audibly annunciated.
Each circuit is configured for Style B (Class B) operation and will accept i
normally-open contact devices as well as conventional 2-wire or 4-wire, 24 VDC smoke detectors.
Refer to the Fire•Lite Device Compatibility Document for a list of compatible devices.
Initiating Device Circuits can be converted to Style D (Class A) by installing the optional Class A
Converter module. Refer to "CAC-5X Class A Converter Module" on page 34.
Class B Initiating Device Circuits (supervised and power-limited) 4.7 K
(refer to Device Compatibility Document for list of compatible relays)
UL listed compatible 4-wire smoke detector
Resettable 24 VDC
4-wire smoke
detector power
(500 mA maximum)
MS-5UD/MS-10UD Series PN 52626:B 8/01/2008
UL listed Power Supervision Relay
manual pull stations
heat detectors
Figure 2.5 IDC Connections
3 smoke detectors which generate a maintenance signal
o
F. The maximum loop resistance
Ω
, ½ watt resistor P/N:71252
UL listed compatible
2-wire smoke detectors
Dummy load all unused
circuits - 4.7 K
resistor (P/N: 71245)
Installation
smoke detectors, any
3
Ω
, ½ watt
27