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