NOHMI BOSAI FRRU004-DCM4 Dual Single Contact Module

NOHMI BOSAI

Manufacturer: NOHMI BOSAI
Model: FRRU004-DCM4

Features of FRRU004-DCM4

One simple LED for status indication
NFPA Class A (Styles 6 & 7) and Class B (Style 4) for SLC
NFPA Class A (Style D) and Class B (Style B) for IDC
Electronic address setting
Downsized unit
Easy installation

Description

“The Dual Contact Module (FRRU004-DCM4) monitors multiple contact points, each assigned a unique address from a single device. You can configure the FRRU004-DCM4 to supervise either a normally open or closed contact. Additionally, it supports Class A wiring for single contact monitoring, and Class B wiring for supervising two contacts.When properly wired, the FRRU004-DCM4 stays fully supervised. A red LED clearly shows the module’s status—flashing under normal conditions and glowing steadily when a contact is activated. If a malfunction occurs, the LED turns off. When monitoring two contacts, the module prioritizes conditions, with activation taking precedence, followed by an open circuit, and lastly, normal operation.”

Specifications of FRRU004-DCM4

No.	Item	Specification (In case of one contact supervising)	Specification (In case of two contacts supervising)
1	Rated voltage range of SLC input power (S+,S-)	22.0 to 24.0V	22.0 to 24.0V
2	Maximum SLC 24 VDC standby current (S+,S-)	250µA	250µA
3	Maximum SLC 24 VDC alarm current (S+,S-)	1mA	1mA
4	IDC input circuit wiring style	NFPA Class A (Style D)	NFPA Class B (Style B)
5	End-of-line resistor for IDC	N/A	5.1kΩ, 1/2W
6	Maximum wiring resistance of IDC	100Ω	100Ω
7	Maximum wiring capacitance of IDC	1µF	1µF
8	Operating temperature range	0°C to 49°C (32°F to 120°F)	0°C to 49°C (32°F to 120°F)
9	Operating humidity range	0 to 93% (non-condensing)	0 to 93% (non-condensing)
10	Address per module	1 Address	2 Addresses
11	Dimensions	106mm (4.17 inches) (H) x 106mm (4.17 inches) (W) x 29mm (1.14 inch) (D)	106mm (4.17 inches) (H) x 106mm (4.17 inches) (W) x 29mm (1.14 inch) (D)
12	Applicable electrical box for installation	North American 64mm (2-1/2 inches) deep 2-gang box	Standard 4 inches square box 38mm (1-1/2 inch) deep box

Installation

Figure 1: Installation into the compatible electrical box

Wiring Diagram

Figure 2: Wiring diagram in case of one contact supervising
Figure 3: Wiring diagram in case of two contacts supervising (Normally-open contact)
Figure 4: Wiring diagram in case of two contacts supervising (Normally-closed contact) (Not recognized as NFPA Initiating Device Circuit)