Input Circuits

Installation

2.3 Input Circuits

The MRP-2001 has six programmable IDCs (Initiating Device Circuits). Each circuit is compatible with System Sensor’s i3 smoke detectors which generate a maintenance signal when the detector becomes dirty and a separate supervisory ‘freeze’ signal when ambient temperature falls below the

detector rating of approximately 45oF. The maximum loop resistance limit for each IDC is 100 ohms. The maximum number of detectors per zone is 25. 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 i3 smoke detectors, any normally-open contact devices as well as conventional 2-wire or 4-wire, 24 VDC smoke detectors. Refer to the 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 26.

Class B Initiating Device Circuits (supervised and power-limited) 4.7 KΩ, ½ watt resistor P/N:71252

 

UL listed Power Supervision Relay

 

(refer to Device Compatibility Document for list of compatible relays)

 

UL listed compatible 4-wire smoke detector

Input IDC

 

 

 

manual pull stations

Waterflow Circuit

Resettable 24 VDC

Normally Open

manual

Waterflow

4-wire smoke

release

Devices or

detector power

heat detectors

Pressure Switches

(500 mA maximum)

 

 

Dummy load all unused circuits - 4.7 KΩ, ½ watt resistor (P/N: 71245)

mrp-2001idc.cdr

Figure 2.5 IDC Connections

MRP-2001 & MRP-2001E PN 53040:A 4/16/2007

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