NR-2N starter (M102 Only)
NR-2N uses two contactors to control motor
rotation speed; the motor contains separate
windings. Rotation speed can be changed “on the
fly” without stop command in between. Low
speed (start 1) can be changed to high speed
(start 2) immediately, and high speed can be
changed to low speed after a changeover time.
Current measurement for NR-2N uses two
external current transformers measuring current
from motor main supply. External current
transformers can be selected separately for both
speeds.
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23 Control circuit for NR_2N starter, separate windings
Operating sequence in NR-2N
• Sending command Start1 (low speed N1) to
close contactor CCA
• Sending command Start2 (high speed N2) to
close contactor CCB
• Contactors are latched
• Stop command opens CCA or CCB
The following control sequence are supported:
• Stop → Start1 → Stop
• Stop → Start2 → Stop
• Stop → Start1 → Start2 → Stop
• Stop → Start2 → Changeover delay → Start1 →
Stop
Name Pin Description
CCLI X4:6 Contactor control voltage input
CCA X4:7 Contactor control A
CCB X4:8 Contactor control B
DI6 (F_Ca) X1:7 Contactor control A feedback
DI7 (F_Cb) X1:8 Contactor control B feedback
DI5 (Loc/R) X1:6 Local/remote control switch input
0 4 . MOTOR STARTERS CONTROL
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