9
3−5.Block diagram
Amplifier part
Control
part
Display part
(PW/TR)(SKIP)(AL1) (AL2)
Operation part
(MODE) (UP) (DOWN) (SET)
POWER INPUT
(DC24V)
Power supply part
Gas alarm contact(AL1、AL2)
Trouble alarm
(TROUBLE)
※Standard setting
・De-energized
(De-energized at normal)
・N.O. contact
(Contact closes at alarm)
Alarm contact control part
4−20mA
transmission
Transmission part
Detector head
(
sensor
)
NC−591W