12
area of wire like below.
⊙
In case of 1.25 mm SQUARE: about 1.2 Km
⊙
In case of 2.0 mm SQUARE: about 2.0 Km
⊙
In case of 3.5 mm SQUARE: about 4.0 Km
Notice) Cross section areas of four sensor extension wire must be same
6.5.2 Local detector (Suction type combustible gas detector)
1) The connection of sensor is the same as diffusion type combustible gas detector.
2) Connection of power for suction pump operation.
⊙
Pump operation power + : connect to terminal #1
⊙
Pump operation power - : connect to terminal #2
Notice) The power for suction pump operation is supplied through the inner fuse.
Then you take care that supply voltage is 18-30VDC and permitted limit of supply
current is 1A
6.5.3 Local detector (2-wire transmitter type toxic gas detector)
1) When you connect with 2-wire 4-20mA output type gas leakage transmitter, the power for
operation of transmitter is supplied through the current limit circuit in a detector. (Max. 30 mA)
2) You may select the jumper of input select to transmitter connection. (Refer to Fig. 4.4)
3) Connection of signal line
⊙
Transmitter : connect to terminal #3
⊙
Transmitter signal – : connect to terminal #4
6.5.4 Local detector (3-wire transmitter type combustible and toxic gas detector)
1) The connection of input jumper is the same as 2-wire type transmitter.
2) When you connect with 3-wire type transmitter, operation power is supplied by suction pump
operation power.
3) Connection of signal line
⊙
Transmitter power + signal : connect to terminal #1
⊙
Transmitter power – signal : connect to terminal #2
⊙
Transmitter signal : connect to terminal #4
Notice) The power for operation is supplied through the inner fuse. Then you take care that
supply voltage is 18-30VDC and permitted limit of supply current is 1A
www.DataSheet4U.com
