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3.5.1 Motor circuit contactors
If required by local codes or for safety reasons, an M-Contactor (motor circuit contactor) may
be installed to provide a physical disconnection of the motor windings from the FlexDrive
(see section 3.5). Opening the M-Contactor ensures that the FlexDrive
motor, which may be necessary during equipment maintenance or similar operations. Under
certain circumstances, it may also be necessary to fit a brake to a rotary motor. This is
important with hanging loads where disconnecting the motor windings could result in the load
falling. Contact your local supplier for details of appropriate brakes.
CAUTION: If an M-Contactor is installed, the FlexDrive
Ensure that shielding of the motor cable is continued on both sides of the contactor.
3.5.2 Motor power cable pin configuration - Baldor BSM rotary motors
Figure 8 shows the pin configuration for a typical Baldor motor cable, part number
CBL025SP-12:
Signal name
Motor U
Motor V
Motor W
Earth/ground
Thermal switch
Thermal switch
Note:
Not all motors
are fitted with
a brake so
pins C and D
might not be
connected.
3-16 Basic Installation
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20ms before the M-Contactor is opened. If the M-Contactor is opened
while the FlexDrive
II
FlexDrive
may be damaged. Incorrect installation or failure of the
M-Contactor or its wiring may result in damage to the FlexDrive
Motor / cable pin
Brake
Brake
B
C
A
4
1
2
Motor power connector
(male)
Figure 8 - Baldor motor power cable pin configuration
II
is supplying voltage and current to the motor, the
1
4
3
2
A
B
C
D
D
D
3
3
Cable connector end view
www.baldormotion.com
II
cannot drive the
II
must be disabled at least
Motor cable wire color
Black, labeled '1'
Black, labeled '2'
Black, labeled '3'
Green/Yellow
Green
White
Blue
Red
C
B
A
4
1
2
(female)
II
II
.
MN1902
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