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L100 Inverter
Operations
and Monitoring
4–23
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) N.O. contact (inverted by C33 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 AL1 AL2 AL0 AL1 AL2 AL0 AL1 AL2
AL0 AL1 AL2
Contact Power
Run
State
AL0-
AL1
AL0-
AL2
N.C.
(after
initialize,
C33=01)
ON Normal Closed Open
ON Trip Open Closed
OFF – Open Closed
Contact Power
Run
State
AL0-
AL1
AL0-
AL2
N.O.
(set
C33=00)
ON Normal Open Closed
ON Trip Closed Open
OFF – Open Closed
Technologies Inc.
Toll Free: voice: 1-877-539-2542 fax: 1-800-539-2542 www.mgitech.com
Technologies Inc.
Toll Free: voice: 1-877-539-2542 fax: 1-800-539-2542 www.mgitech.com