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Contactor Motor Select
General Information
Contactor motor select (CMS) is an option
available for one drive alternating operation
between two motors. Contactors M4, M5,
and switch SW2 are added in the option
panel for this function. The motors must be of
equal hp and current rating and match the
drive rating (as in single motor operation).
Motor selection is made through a panel-
mounted selector switch (SW2), remotely
through control wiring input, serial communi-
cations, or the drive’s smart-logic controller.
Status reporting is available to indicate which
motor is in operation.
Prior to Enabling Contactor Motor Select
•
Complete the start-up procedure to
verify the motor rotation direction is
correct for both motors and that the
system is ready in all respects for
continuous operation.
Operation
•
The panel mounted contactor motor
select switch (SW2) has three posi-
tions: Motor 1/Auto/Motor 2. It is
operated by hand for manual opera-
tion. The motor 1 position selects
motor 1, and the motor 2 position
selects motor 2.
•
When SW2 is in the auto position,
either motor can be selected remotely.
(Do not close both contacts at once.)
•
The drive’s smart-logic controller can
alternate motors when SW2 is in auto
position. See the drive support materi-
als for details.
•
Serial communications commands
can alternate motors when SW2 is in
auto position. See the drive support
materials for details.
Motor Select Status
•
The EMB option panel reports the
motor selected in either local or
remote operation.
Contactor Motor Select Function Setup
For EMB(0) or ECB, see the connection
drawing supplied with the unit. For EMB1 or
EMB2, make connections as follows.
•
For remote control, connect control
wiring to connector X56 terminals 11
and 12 for motor 1 operation and to
terminals 11 and 10 for motor 2.
•
For status reporting, wire to connector
X55 terminals 11 and 12 for motor 1
select, and connector X56 terminals 1
and 2 for motor 2 select.
Contactor Motor Select Switch
This optional switch is provided for contact
motor select available with the EMB option
when two equally rated motors are operated
by one drive. The panel mounted Motor 1/
Auto/Motor 2 selector switch provides local
control of motor 1 or 2 along with an auto
setting that allows for remote motor selection.
