Baldor MN850 User Manual

Operation 3-1

MN850

The start–up procedure will help get your system up and running quickly and will allow
motor and control operation to be verified.  This procedure assumes that the Control and
Motor are correctly installed (see Section 2 for procedures) and that you have a basic
understanding of the keypad programming & operation procedures.

1.

Read the Safety Notice and Precautions in section 1 of this manual.

2.

Mount the control.

3.

Be sure the cover is on and the keypad is plugged in but all power is OFF.

4.

Connect Three Phase AC power (L1, L2, L3).

5.

Connect 115VAC 1 phase power (X1, X2).

Note: Factory assembled combination and non–combination controllers and

controllers in ventilated NEMA 12 enclosures have an internal transformer
that provides 115VAC power to X1 and X2 terminals (pre–wired).

6.

Connect the motor.

Check of electrical items.

1.

Verify the Three Phase AC line voltage at source matches control rating.

2.

Verify the X1, X2 Control Voltage at source is correct.  An external fuse is
required and must be sized as described in Table 2-3.

3.

Verify the Control Voltage Selector Switch is correctly set.

4.

Inspect all connections for accuracy, workmanship and tightness as well as
compliance to codes.

5.

Verify control and motor are grounded to each other and the control is
connected to earth ground.

6.

Check all signal wiring for accuracy.

7.

Be certain all brake coils, contactors and relay coils have noise suppression.
This should be an R-C filter for AC coils and reverse polarity diodes for DC
coils. MOV type transient suppression is not adequate.

1.

Verify freedom of motion of motor shaft.

2.

Verify that the motor coupling is tight without backlash.

3.

Verify the holding brakes if any, are properly adjusted to fully release and set to
the desired torque value.