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SJ300 Inverter
Operations
and Monitoring
4–49
The alarm output terminals operate as shown below (left) by default. The contact logic can be
inverted as shown (below right) by using the parameter setting C036. 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.
Contact position after initialization Contact position inverted by C036 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
AL1
AL0 AL2
AL1
AL0 AL2
AL1
AL0 AL2
AL1
AL0 AL2
Contact Power
Run
State
AL0-
AL1
AL0-
AL2
N.C.
(after
initialize,
C036=01)
ON Normal Closed Open
ON Trip Open Closed
OFF – Open Closed
Contact Power
Run
State
AL0-
AL1
AL0-
AL2
N.O.
(set
C036=00)
ON Normal Open Closed
ON Trip Closed Open
OFF – Open Closed