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ABB MD21 - Nr-DolRcu Starter; Control through M10 X; Control through RCU

ABB MD21
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15 Control circuit for NR-DOL starter (for M10x)
NR-DOL/RCU STARTER
Remote control unit (RCU) is a starter type where
contactors are directly controlled by a special
RCU switch located near the motor. This allows
control of the motor even without the M10x.
Name Pin Description Remarks
CCLI X4:6 Contactor control voltage input
CCA X4:7 Contactor control A
GR1_C X4:3 Programmable relay output Only for M101
CCC X4:9 Contactor control C Only for M102
DI6(F_Ca) X1:7 Contactor control A feedback
DI5(Loc/R) X1:6 Local/remote control switch
input

* The assigned DI and PIN code may change in actual design
Operating sequence
Control through M10x-
• Starting Sequence: Motor is stopped and ready
to startSTART command is receivedInternal
contact CCA closed and remain closed for 1s
Feedback is received
• Stopping Sequence: Motor is runningSTOP
command received internal CCC (M102) or
GR1_C(M101) contact closed and remain closed
for 1s Feedback received
Control through RCU
When the motor is operated by RCU, M10x is by-
passed still verify the motor state through
feedbacks.
24 MOTOR CONTROL AND PROTECTION UNIT M10X USER GUIDE

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