Page 2 of 11
123-652 Rev -
1
GENERAL SPECIFICATIONS
Operating Voltage: 12 - 32 VDC
Backup Power Supply: 12 - 32 VDC
Power Supply Protection: 3A Fuses
Internal Voltage Protection - 3 diodes
Pressure Switch - 2 normally closed inputs
Visual Indications - POWER - Green
PS1 - Red
PS2 - Red
Buzzer: 85 dB @ 10 cm
Standby Power Consumption (All three Models)
13 VDC, 100 mA
28 VDC, 100 mA
Discharged Power Consumption
PN: 131-740: 13 VDC, 370 mA
28 VDC, 180 mA
PN: 131-745: 13 VDC, 570 mA
28 VDC, 260 mA
PN: 131-750: 13 VDC, 750 mA
28 VDC, 350 mA
Enclosure Material: Grey flame retardant ABS
Flame Rating: UL94-5VA (with textured cover)
Enclosure Protection level: Ingress protection 66 (IP66)
Operating Temperature: -7
o
C/20
o
F to 54
o
C/130
o
F
Storage Temperature: -7
o
C/20
o
F to 54
o
C/130
o
F
Display Connection: CAT-5 VIA RJ45 Socket
Relays: 5 VDC Form C – Normally Open (N/O) 20A
Normally Closed (N/C) 10A
Connectors - Wago 739, Max wire size 12AWG/2.5 mm
Dimensions: 7.29 (W) x 4.72(H) x 2.37(D) inch
185.17(W) x 119.89(H) x 60.20(D) mm
Weight: .6 kg / 1.3 lb.
Mounting: Surface
Compliant: RoHS, CE
1.1
Features
Fully automatic machinery shutdown system
Shutdown override mode
Power-On visual indication
Pressure Switch (PS1) Visual and audible indication (Agent Discharge)
Pressure Switch (PS2) Visual and audible indication (Sensor Switch Warning)
Compact construction
Optional Time Delay reset function
2
OPERATION
The Machinery Shutdown Restart unit is a low voltage microcontroller unit designed to integrate with the Sea-Fire Fire
Suppression System to shut down the engine(s), blower(s), generator(s), damper(s) and other machinery in the protected
space should fire or extreme overheating cause the Sea-Fire automatic Fire suppression system to discharge. The
machinery shutdown will ensure that the fire suppression agent, in its proper concentration, will remain in the enclosed
compartment and not be ingested or reduced by the running machinery.
Immediately upon agent discharge, the MSRS PS1 closed loop circuit opens, activating the alarm and energizing all the
relays. Energizing the relays will change the state of the internal contacts and shut down all the machinery connected to
the MSRS unit. The PS1 LED on the Unit and the DISCHARGE LED on the Display Panel illuminate. The activated alarm can
be silenced by pressing the SILENCE button on the MSRS unit or on the connected Display Panel.
After a discharge or loss in cylinder pressure resulting in an opened PS1 loop, simultaneously pressing the SILENCE and the
“
” buttons will put the MSRS into override enabling all the machinery connected to the MSRS to restart. The MSRS can
only be properly reset after the discharged agent cylinder has been refilled/replaced and then the SHUTDOWN RESET
buttons pressed to put the unit back into the standby mode. In the standby mode, only the green POWER LED on the MSRS
and the Display Panel will remain on.
Summary of Contents for 131-740
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