PT1E-0930
20
５－４－２．External output action
１．4-20mA output version
(1)Signal transmission method : Electric current transmission (Non isolation)
(2)Transmission path
: CVVS
(3)Transmission distance
: Below 1 km
(4)Resistive load for connection : Below 300Ω
(5)Status signal level
①Detection mode
: 4-20mA (Depends on gas concentration)
②Gas alarm
: 4-20mA (By indication valve)
③Initial clear
: 2.5mA (Fixed)
④Maintenance mode
: 2.5mA (Fixed)
⑤Alarm test
: 4-20mA (By indication valve)
⑥Trouble alarm
: 0.5mA (Fixed)
⑦Point skip
: 2.5mA (Fixed)
(6)Power shut-off
: 0mA
Relations between 【Gas concentration】 and 【Output】 are shown below.
CAUTION
4-20mA outputs are already adjusted. If re-adjustment is required after installation,
specialized service man will make re-adjustment.
Do not make this adjustment without permission.
2.5mA
4mA
20mA
22mA
Full scale
Gas concentration
Output
0
Detection mode
Maintenance mode
