MODIFYING
 THE ACS355 UL TYPE 
4X FOR MXXX OPTIONS 
 
Description: 
The following instructions are designed to provide a step by step procedure; how to modify the 
ACS355 UL Type 4X drive for Mxxx-01 (MPOW-01, MREL-01 or MTAC-01) option. If these 
procedures are followed and executed properly all standard product warranties apply. 
 
1.1  Table of Contents 
1.1  Table of Contents ...................................................................................................................... 1 
2  General Information ....................................................................................................................... 2 
2.1  Description ................................................................................................................................. 2 
2.2  Safety in Installation and Maintenance ...................................................................................... 2 
2.3  Reference Documentation ......................................................................................................... 2 
3  Remove & Modify the UL Type 4X Drive Cover ............................................................................ 3 
3.2  Using a dremel tool cut the power and fault indicator extension tab approximately a 3/16” 
from the cover surface. ....................................................................................................................... 4
 
4  Modify Mxxx-01 (MPOW-01, MREL-01, MTAC-01) for UL Type 4X drive mounting. .................... 4 
4.1  Using a screw driver release the four securing tabs and then remove the top cover. .............. 4 
5  Install Mxxx-01 to ACS355 U.L Type 4X Drive .............................................................................. 6 
5.1  Remove the standoff and screw from the Mxxx-01 Kit. ............................................................. 6 
5.2  Remove the circuit board fastening screw from the drive and insert and tighten the Mxxx-01 
standoff.   ............................................................................................................................................ 6
 
5.3  Install the Mxxx-01 option onto the drive and secure using the screw provided with the Mxxx-
01 kit. ................................................................................................................................................... 6
 
6  Control Panel Access Option & Reassemble ................................................................................ 7 
6.1  Option 1 – Built-In Control Panel – Disconnected Note: Option 1 will require removing the 
ACS355’s UL Type 4x front cover to connect the drives control panel. ............................................. 7
 
6.2  Option 2 – Blank Control Panel - Note: Option 2 will require removing the control panel 
access cover to connect the drives control panel. The control panel will have to be stored external 
to the drive. ......................................................................................................................................... 7
 
 
 
 
Author: Jeff Fell – Application Eng., Greg Semrow – Product 
Marketing  Date: 8, 2014 
External 
http://www.abb.us/drives.     
Industry – Industrial 
 Document #: LVD-EOTN72U-EN 
Revision: A 
Product Categories: ACS355, MPOW, MREL, MTAC