80-4284-04

Rev. 02

MODELS 42-109

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REPLACEMENT INSTRUCTIONS

DIGITAL CONTROL MODULE (DCM-3)

REPLACEMENT KIT P/Ns 12-8062-31, -33 & -34

PURPOSE

The purpose of these instructions is to provide a step-by-step method for replacing the Digital Control

Module (DCM-3) of the Group 42 control drive.

Maintenance should be performed in a clean working environment. If possible, the drive should be removed from its mounting point and taken to a maintenance room or workstation.

5. Using a Philips head screwdriver, loosen the (4)

#10-32 captive fastening screws. Carefully slide the DCM board out of its socket.

6. Place the old DCM board into an anti-static bag and set aside.

Install the new DCM-3 board

CAUTION

Observe precautions for handling electrostatic sensitive devices.

REQUIRED TOOLS

1/2” socket or wrench

#1 Philips head screwdriver

Scotch™ 847 gasket adhesive or equivalent

Torque wrench appropriate for 10 lb-ft

Torque screwdriver (#1 Philips) appropriate for

19 lb-in

WARNING

Electrical shock hazard—disconnect power before proceeding. Remove the drive from line voltage and shut off any external power sources feeding the auxiliary switches.

PROCEDURE

Remove the old DCM board:

Refer to Figure 1 for component identification.

1. Remove power from the drive.

2. Remove the terminal enclosure cover by loosening the (6) 5/16-18 hex head captive screws.

3. Locate the DCM board within the terminal enclosure.

4. Remove the wire harness connector from the top of the DCM board and any other wire connections.

7. Remove the DCM-3 board from its anti-static bag.

8. Carefully plug the new DCM-3 board into its socket on the chassis bracket, located within the terminal enclosure of the drive.

9. Use a Philips head screwdriver to tighten the (4)

#10-32 captive fastening screws on the board.

Torque to 19 lb-in (2 N•m).

10. Reattach the wire harness connector to the plug located at the top of the DCM-3 board and the wire connector behind the local control board.

11. Inspect the terminal enclosure cover gasket and replace, if necessary. If the gasket is in good condition, skip to Step 15.

12. Clean the mating face on the drive body to remove all gasket material and adhesive.

Ensure that the mating surface is free of defects such as dents or gouges.

13. Apply a thin film of gasket adhesive (Scotch™

847 or equivalent) to the mating face of the drive body.

14. Firmly press the new gasket into place and allow time for the adhesive to set before continuing.

15. If the drive has been removed from its mounting location for maintenance, reinstall it. It will be necessary to temporarily install the enclosure cover to protect the electronics during the remounting process.

CAUTION

Observe precautions for handling electrostatic sensitive devices.

Continued

E L E C T R I C A C T U A T O R S F O R I N D U S T R I A L P R O C E S S C O N T R O L

16. Restore power to the drive. The new DCM-3 will need to be calibrated. Please refer to the calibration section of Beck instruction manual

80-0042-01 for proper calibration instructions.

17. Reinstall the terminal enclosure cover and tighten the (6) 5/16-18 hex head captive scriews to 10 lb-ft (14 N•m) torque.

18. Return the drive to service.

Table 1: DCM-3 Replacement Kit

Part Number

22-5014-59

Description

DCM-3 Board

22-5014-29

22-5014-49

20-0660-76

DCM-3 Board (FF)

DCM-3 Board (Profibus)

Terminal Enclosure Gasket

Terminal Enclosure

Enclosure Cover

(6) 5/16-18 x 1.75 Hex Head

Captive Screws

Digital Control

Module (DCM-3)

Figure 1

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HAROLD BECK & SONS, INC.

11 TERRY DRIVE NEWTOWN, PENNSYLVANIA 18940 USA

PHONE: 215-968-4600 FAX: 215-860-6383 E-MAIL: [email protected] www.haroldbeck.com

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