Baldor Series 10, Installation And Operating Manual

Page: 22 / 74

Installation 2-9
M-Contactor
If required by local codes or for safety reasons, an M-Contactor
(motor circuit contactor) may be installed. However, incorrect
installation or failure of the M-Contactor or wiring may damage
the control.
Caution: If an M-Contactor is installed, the control
must be disabled at least 20msec before the
M-Contactor is opened. If the M-Contactor is
opened while the control is supplying
voltage and current to the motor, the control
may me damaged.
A motor circuit contactor provides a positive disconnect of the
motor windings from the control. Opening the M-Contactor
ensures that the control cannot drive the motor. This may be
required during certain manual operations with the load (like
cleaning cutting knives etc.). Figure 2-3 shows how an
M-Contactor is connected to the H series control.
Figure 2-3 Typical Connections for M-Contactor
M
Stop/E-Stop
M3
M2
M1
Motor
M
See recommended tightening torques for terminal connectors.