FT2GAS
Gaseous Extinguishing System
Rev No. 1.3
32
Table 15 Gas Control board Connections
Designato
r
Type
Pin
Label
Description
TB1
Removable
screw
terminal block
EARTH E
Earth connection to the gas module
+24
LCS INTERFACE
LCS +24V output, 22V-30V, <=0.5A
GND
LCS GND
MCP
LCS remote gas release input
ISO
LCS remote gas isolate input
TB2
Removable
screw
terminal block
+
LOCK-OFF I/P
gas lock-off valve input from lock off
valve
-
+
RELEASE I/P
Manual gas release input from
Mechanical switch
-
+
DISCHGED I/P
Gas discharged sensor input from
discharge pressure switch
-
TB3
Removable
screw
terminal block
SYS
INOP +
WARNING SIGNS
Gas system inoperative warning output,
22V-30V, <=0.5A
SYS
INOP -
L1+/L2-
Level 1 & Level 2 alarm to warning
signs, “FIRE ALARM / EVACUATE” and
“FIRE ALARM / DO NOT ENTER”,
strobes and sounders as required.
At monitoring:
Polarity order at this pin pair is at ’+’ and
’-‘ 6V.
When activated:
’+’ and ’-‘ polarity for level 1 alarm,
’-’ and ’+‘ polarity for level 2 alarm.
22-30V DC, <=3A
L1-/L2+
TB4
Removable
screw
terminal block
+
GAS DISCH O/P
Gas discharge output, 22V-30V, <=3A to
solenoid actuator or detonating device
on gas cylinders
-
TB5
Removable
screw
terminal block
+24
POWER
Connect to the FT2 control board TB3
power output, 22V-30V, <=5A
GND
CON1
DB9 male
connector
N/A
N/A
Connect to the FT2 control board CON1
CON2
IDC 16
connector
N/A
N/A
Connect to the gas display board
