Multicrest
fire alarm system

TMFRRU004-GSCU

Gas Suppression Control UnitFeatures• Field control unit for gas suppression systems• SLC Class B, Class A, and Class X• NACs and DI (discharge indicator) Class B• Programmable NAC, DI, abort, and manual release circuits• Equipped with changeover switch (Auto & Manual or Manualonly) and countdown timer• Status LEDs for power input, changeover switch, abort, manual release,trouble, suppression disabled, pre-discharge, discharge• Electrical address settingDescription
The FRRU004-GSCU module is used to control gas suppression systems. The FRRU004-GSCU is capable of discharging the gas either byautomatic or manual. The FRRU004-GSCU monitors manual release switch and abort switch status, counts down to gas discharge, operates
output devices, and indicates the gas discharge. The FRRU004-GSCU has the changeover switch which selects Auto & Manual or Manual Only.
The FRRU004-GSCU continuously supervises the wiring connected to the terminals NAC1, NAC2 and DI for open or short circuits and presenceof 24VDC.

Ordering Information
Control Unit: FRRU004-GSCU-R
Enclosure for GSCU: ECL-GSCU-R

Specifications
No.
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Item
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-)
Operating voltage of external power supply line (24+,24-)
Rating for NAC1 and NAC2
Rating for DI
Rating for total of NAC1, NAC2, and DI
Rating for contact output
Contact output style
Consumption current of the board at standby
Consumption current of the board at alarm
Wiring style for NAC1, NAC2 and DIEnd-of-line resistor for NAC1, NAC2 and DI
Maximum wiring resistance of output circuit wiring
Maximum wiring capacitance of NAC1, NAC2 and DI circuit wiring
Operating temperature range
Operating humidity range
Address per module
Maximum number of modules per FACP
Dimensions

Specification
22.0 to 24.0 V
250 μA
250 μA
24 VDC
1.5 A per circuit
1.0 A
3.0 A for three circuits
2.0 A
Typical Form C
80 mA
150 mANFPA Class B
5.1kΩ, 1/2W
Refer to Wiring diagram
1 μF
0 to 49°C (32 to 120 °F)
0 to 93% (non-condensing)
2 addresses14 units
145 mm (5.71”) (H) ×200 mm (7.87”) (W) ×57 mm (2.24”) (D)Setting the Address
Each addressable module, smoke detector, heat detector and combination detector must have the address set before connecting the device
to the Signaling Line Circuit (SLC) loop. The address is set using the hand held device programmer.

Installation
Figure 1:Installation into the ECL-GSCU-R

Wiring Diagram
Figure 2: Wiring diagram of FRRU004-GSCU

From UL864
power limited
power supply

SLC Loop

24VDC(+)
24VDC(-)
1234

S+S24+24-SW1

From FACP orprevious module
To the nextmodule

Normally closed
CommonNormally open
NAC1+
NAC1NAC2+
NAC2DI+DINC
COMNOMR+MRAb+Ab+-++-++-+-Discharge

Manual Release SW

Abort SW

End of line resistor
5.1k or 10k ohm 1/2W

Notice・These instructions do not purport to cover all the details or variations in the equipment described, not provide for every possible
contingency to be met in connection with installation, operation and maintenance.
・Specifications are subject to change without notice. Contact Nohmi before relying on above specifications.
・Actual performance is based on proper application of the product by a qualified professional.
・Should further information be desired or should particular problems arise, which are not covered sufficiently for the purchaser’s purpose,the matter should be referred to Nohmi or a distributor in your region.

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 191205Ⓓ-F-27000