Rockwell Automation 1391 INSTR/DIGITAL AC SERVO DRIVE - Manual

ALLEN-BRADLEY
Instructions
1391-DES Digital AC Servo Drive
Board Replacement Kit
(Cat. No. 1391-DESxx-DI-AQB)
Introduction This publication provides the steps needed to replace any of the following
1391-DES Digital AC Servo Drive circuit boards:
•
Display Board
•
Memory Board
•
Logic Control Board
•
A Quad B (Encoder Output) Board
Information on replacement board part numbers can be obtained in the
1391 Renewal Parts publication (1391-6.0).
Replacement Procedures Substituting or interchanging major board assemblies is a common
technique used in troubleshooting/repairing closed loop position systems.
The procedures provided must be followed when substituting or
interchanging board assemblies. Refer to Figure 1 for board and connector
locations.
ATTENTION: This product contains stored energy devices. To
avoid hazard of electrical shock, verify that all voltage on the
capacitors has been discharged before attempting to service,
repair or remove this unit.
Voltage at terminals 9 (+) and 7 (–) of TB5 must be “0.00” as
measured with a standard digital voltmeter or multimeter.
Only qualified personnel familiar with solid-state control
equipment and safety procedures in publication NFPA 70E
should attempt this procedure.
!
ATTENTION: This drive contains ESD (Electrostatic
Discharge) sensitive parts and assemblies. Static control
precautions are required when installing, testing, servicing or
repairing this drive. Component damage may result if ESD
control procedures are not followed. If you are not familiar with
static control procedures, reference A-B publication 8000-4.5.2,
Guarding Against Electrostatic Damage or any other applicable
ESD protection handbook.
!