Hitachi SJ100 User Manual
Page 148
SJ100 Inverter
Oper
ations
and Monitor
ing
4–31
The alarm output terminals are connected as shown below (left) by default. The contact
logic can be inverted as shown (below right) by using the parameter setting C_33. The
relay contacts normally open (N.O.) and normally closed (N.O.) convention uses
“normal” to mean the inverter has power and is in Run or Stop Mode. The relay contacts
switch to the opposite position when it is in Trip Mode or when input power is OFF.
N.C. contacts (after initialization)
N.O. contact (inverted by C_33 setting)
During normal running
When an alarm occurs
or power is turned OFF
During normal running
or power is turned OFF
When an alarm occurs
AL0
AL2
AL1
AL0
AL2
AL1
AL0
AL2
AL1
AL0
AL2
AL1
Contact
Power
Run
State
AL0-
AL1
AL0-
AL2
N.C.
(after
initialize,
C_33=01)
ON
Normal
Closed
Open
ON
Trip
Open
Closed
OFF
—
Open
Closed
Contact
Power
Run
State
AL0-
AL1
AL0-
AL2
N.O.
(set
C_33=00)
ON
Normal
Open
Closed
ON
Trip
Closed
Open
OFF
—
Open
Closed