Hitachi SJ100 Series Instruction Manual page 130

4–26
Using Intelligent Output Terminals
The alarm output terminals are connected as shown below (left) by default, or after
initialization. The contact logic can be inverted as shown (below right) by using the
parameter setting C33. 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)
During normal running
AL0 AL1 AL2
Contact Power
N.C. ON
(after
ON
initialize,
C33=01)
OFF
When an alarm occurs
or power is turned off
AL0 AL1 AL2
Run AL0- AL0-
State AL1 AL2
Normal Closed Open
Trip Open Closed
– Open Closed
N.O. contact (inverted by C33 setting)
During normal running When an alarm occurs
or power is turned off
AL0 AL1 AL2
Run
Contact Power
State
N.O. ON Normal
(set
ON Trip
C33=00)
OFF –
AL0 AL1 AL2
AL0- AL0-
AL1 AL2
Open Closed
Closed Open
Open Closed