Installation, Operation and Maintenance Manual Small DC Motors • 56 Frames
Small DC Motors Receiving and Handling ! ATTENTION: Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should install, adjust, operate, and/or service this motor. Read and understand this manual in its entirety before proceeding. Failure to observe this precaution could result in personal injury or loss of life. Acceptance Unpack motor carefully and inspect for possible damage during shipment.
Small DC Motors 3 When mounting through a flexible coupling, verify that there is adequate clearance between the driven equipment shaft, the coupling interface and the motor shaft. Lack of clearance may result in binding of the shafting and premature bearing failure. Always slide the motor tenon into the mating flange to its full depth before tightening the mounting bolts. Do not allow the motor to hang by the shaft extension while assembling it to the driven equipment (i.e. quill input gear case).
Small DC Motors Rotation Facing Commutator End Type CCW Low +A1 Voltage Connection 1, 2 Shunt –A2 CW +F1 –A1 F11 –F2 High +A1 Voltage Connection 1, 2 +F1 +A2 –A1 +A2 F2 F22 +A1 S1 A1 S1 A2 S2 +A2 S2 Low +A1 Voltage Connection 1, 2 A2 S1 +F1 A1 +F1 F11 +A2 F11 F2 S1 F2 S2 F22 S2 F22 High +A1 Voltage Connection 1, 2 A2 S1 +F1 A1 +F1 F11 +A2 F11 F2 S1 F2 –S2 F22 –S2 F22 Series Permanent Magnet Thermostat (if furnished) Ground Connection 2 +F1 F11 F22 1 –
Small DC Motors 5 Important: When motors are provided with thermal protection (typically thermostats), it is important to properly connect and apply the devices. This will ensure that the motor is properly protected from being operated if thermal limits are reached and/or exceeded. The control system must be configured to reduce the motor load and/or shut down the motor control system to allow the motor to cool to a level within acceptable operating ranges.
Small DC Motors Bearings Ball bearings are deep grooved, double shielded with sufficient lubricant packed into the bearings by the manufacturer for “life lubrication.” The initial lubricant is supplemented by a supply packed into larger reservoirs in the end shield at time of assembly. No grease fittings are provided. The initial lubrication is adequate for up to 5 years of operation under normal conditions.
Small DC Motors 7 General ! ATTENTION: Internal parts of this motor may be at line voltage even when motor is not rotating. Disconnect all AC line connections before contacting any internal part. The following should be checked at regular intervals: • Windings should be dry and free of dust, grease, oil, and dirt. Windings may be cleaned by suction cleaners or by wiping. Nozzles on suction type cleaners should be non-metallic.
Online Documentation The latest motor information can be obtained from the Allen-Bradley Drives & Motors home page on the World Wide Web at: http://www.controlmatched.com Publication 1325R-UM001B-EN-P Ð August, 2001 Supersedes 1325R-UM001A-EN-P dated May, 2001 Copyright © 2001 Rockwell Automation. All rights reserved. Printed in USA.
