Multicrest
fire alarm systemTM

FRRU004-DCM4

DUAL CONTACT MODULEFeatures• 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) is used to supervise multiple contact points with unique addresses from a single device. The
FRRU004-DCM4 may be configured to monitor a normally open or normally closed contact. In addition, the FRRU004-DCM4 may be configured
as a single contact utilizing Class A wiring methods. In case of one contact supervising, wiring shall comply with the Class A (Style D) wiring. Incase of two contacts supervising, wiring shall comply with the Class B (Style B) wiring.
The FRRU004-DCM4 is fully supervised if wired in accordance with the wiring diagrams on next page.
FRRU004-DCM4 employs one red LED to indicate the status. In normal condition, the LED flashes. When the contact is activated, the LED willturn on constantly. In case of trouble, the LED will turn off. In case of two contacts supervising, if the conditions of two contacts are different eachother, the LED shall activate with higher priority condition. The highest priority of contact condition is activated condition of contact, the middle
priority is open circuit, and the lowest priority is normal condition.

Ordering Information
Model no. FRRU004-DCM4Specifications
No.

Item

1234567891011

Rated voltage range of SLC input power (S+,S-)
Maximum SLC 24 VDC standby current (S+,S-)
Maximum SLC 24 VDC alarm current (S+,S-)
IDC input circuit wiring styleEnd-of-line resistor for IDC
Maximum wiring resistance of IDC
Maximum wiring capacitance of IDC
Operating temperature range
Operating humidity range
Address per module
Dimensions

12

Applicable electrical box for installation

Specification
In case of one contact supervising
In case of two contacts supervising22.0 to 24.0V
250µA
1mA
NFPA Class A (Style D)
NFPA Class B (Style B)
N/A
5.1kΩ, 1/2W
100Ω
1µF
0°C to 49°C (32°F to 120°F)
0 to 93% (non-condensing)
1 Address
2 Addresses
106mm (4.17 inches) (H) × 106mm (4.17 inches) (W) × 29mm (1.14 inch) (D)North American 64mm (2-1/2 inches) deep 2-gang box
Standard 4 inches square box 38mm (1-1/2 inch) deep box

Setting the Address
Each addressable module, smoke detector, heat detector and combination detector must have the address set prior connecting the device to theSignaling Line Circuit (SLC) loop. The address is set using the hand held device programmer.
A dedicated address number is configured per FRRU004-DCM4 module prior to connecting the module to SLC loop. When FRRU004-DCM4 isused as two contacts supervising, two addresses are assigned. When the first address number is assigned by address setting unit, the second
address number shall be assigned automatically with adding one (1) to first address number. For example, if the first address number is assigned
as “n”, the second address number shall be assigned as “n+1” automatically.

Installation
Figure 1: Installation into the compatible electrical box

Wiring Diagram
Figure 2: Wiring diagram in case of one contact supervising

From FACP orprevious module
SLC Loop
To the nextmodule

S+SJP1
LED

C1
NO1
Z1
C2
NO2Z2

Select Style D
Note: End-of-line resister is not required.

Figure 3: Wiring diagram in case of two contacts supervising (Normally-open contact)

From FACP or
previous module
SLC Loop
To the nextmodule

S+SJP1
LEDC1
NO1
Z1
C2
NO2
Z2

End of line resistor
5.1k ohm 1/2W

Select Style B
End of line resistor
5.1k ohm 1/2W

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

Only one normally-closed contact

From FACP or
previous module
SLC Loop
S+S-To the nextmodule

JP1LED

C1
NO1
Z1
C2
NO2
Z2

Note: End-of-line resister is not
required.

Only one normally-closed contact
Note: End-of-line resister is notrequired.

Select Style BNOTE
・The information contained herein does not purport to cover all the details or variations of the equipment described, nor to provide for every
possible contingency that may be met in connection with its installation, operation or maintenance.
・Specifications are subject to change without notice. Contact Nohmi before relying on the information.
・Actual performance is based on proper application of the product by a qualified professional.
・Should further information be required or should particular concerns arise that are not covered sufficiently for the purchaser’s purposes, thematter should be referred to Nohmi or your nearest distributor.

Contact• Head Office: 4-7-3 Kudan-Minami, Chiyoda-ku, Tokyo
102-8277, Japan• Phone: (81) 3 - 3265 - 0231
• F A X: (81) 3 - 3265 - 5348
URL http://www.nohmi.co.jp/english/

Catalog Number 131020Ⓓ-F-16001