Input Circuits - Honeywell Fire-Lite Alarms MS-5UD Series Manual

Installation

2.3 Input Circuits

The MS-5UD has five IDCs (Initiating Device Circuits) and the MS-10UD has ten IDCs. Each cir-
cuit is compatible with System Sensor's i
when the detector becomes dirty and a separate supervisory 'freeze' signal when ambient tempera-
ture falls below the detector rating of approximately 45
each IDC is 100 ohms (700 ohms per zone for linear heat detection). Do not use 2-wire smoke
detectors on input zones used for linear heat detection. 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 37.
Class B Initiating Device Circuits (supervised and power-limited) 4.7 K, ½ watt resistor P/N:71252
(refer to Device Compatibility Document for list of compatible relays)
Resettable 24 VDC
4-wire smoke
detector power
(500 mA maximum)
30
UL listed Power Supervision Relay
UL listed compatible 4-wire smoke detector
manual pull stations
heat detectors
Figure 2.5 IDC Connections
smoke detectors which generate a maintenance signal
3
o
F. The maximum loop resistance limit for
MS-5UD & MS-10UD Series Manual — P/N 52626:C2 1/24/2012
Input Circuits
smoke detectors, any
3
UL listed compatible
2-wire smoke detectors
Dummy load all unused
circuits - 4.7 K, ½ watt
resistor (P/N: 71245)