Baldor E100 manual Motor circuit contactors

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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 MicroFlex e100 (see section 3.5). Opening the M-Contactor ensures that the MicroFlex e100 cannot drive the 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 MicroFlex e100 must be disabled at least 20ms before the M-Contactor is opened. If the M-Contactor is opened while the MicroFlex e100 is supplying voltage and current to the motor, the MicroFlex e100 may be damaged. Incorrect installation or failure of the M-Contactor or its wiring may result in damage to the MicroFlex e100.

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 / cable pin	Motor cable wire color
Motor U	1	Black, labeled ‘1’
Motor V	4	Black, labeled ‘2’
Motor W	3	Black, labeled ‘3’
Earth/ground	2	Green/Yellow
Thermal switch	A	Green
Thermal switch	B	White
Brake	C	Blue
Brake	D	Red

Note:

Not all motors are fitted with a brake so pins C and D might not be connected.

B	C
A	D
	4
1	3
	2

Motor power connector

(male)

CB

DA

4

31

2

Cable connector end view

(female)

Figure 8 - Baldor motor power cable pin configuration

MN1942 Basic Installation 3-19