Hitachi L100 Instruction Manual page 114

During normal running
Contact
N.C.
(after
initialize,
C33=01)
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Technologies Inc.
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)
When an alarm occurs
or power is turned off
AL0 AL1 AL2 AL0 AL1 AL2
Run AL0-
Power
State AL1
ON Normal Closed
ON Trip Open
OFF – Open
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N.O. contact (inverted by C33 setting)
During normal running
or power is turned off
AL0 AL1 AL2
AL0-
Contact Power
AL2
Open N.O. ON
(set
Closed ON
C33=00)
Closed OFF
4–23
L100 Inverter
When an alarm occurs
AL0 AL1 AL2
Run AL0- AL0-
State AL1 AL2
Normal Open Closed
Trip Closed Open
– Open Closed