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ABB MD21 - NR-Softstarter (M102 Only); Operating Sequence in NR-Softstarter; Control Circuit for NR-Softstarter

ABB MD21
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Name Pin Description
CCLI X4:6 Contactor control voltage input
CCA X4:7 Contactor control A
CCC X4:9 Contactor control C
DI6 (F_Ca) X1:7 Contactor control A feedback
DI5 (Loc/R) X1:6 Local/remote control switch input

26 Control circuit for NR-softstarter
NR-softstarter (M102 only)
Softstarter applications are for controlling the
motor accessory softstarter device. M102 gives
start and stop commands to the softstarter unit.
The softstarter is set for adjusting motor voltage
with its own parameters. More information about
softstarter can be found in the softstarter
manual.
This starter type supports all protection
functions during normal running situations.
For motor start and stop period, some of the
protection functions are disabled by these
parameters. Current feedback function is
suppressed under soft-starter control.
Operating sequence in NR-softstarter
Motor is stopped Start1 CCA closes CCC
closes
Motor is running Stop CCC opens ramp
down time CCA opens
* The assigned DI and PIN code may change in actual design
34 M O TO R C O NT R O L A N D P R O T E C T I O N U N IT M10 X US ER G U I D E

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