Removal Of Integrated Electronic Unit; Covers - ABB PME120-AI Service Instruction

PME120-AI / PME120-AN (Contrac) ELECTRICAL ROTARY ACTUATOR | SEI/PME120-EN REV. A

Removal of integrated electronic unit

A Electronic unit
Figure 20: PME120-AI
Note
If you want to use a faultless running electronic unit for another
actuator, it is absolutely necessary to delete the basic settings
of the operating range before you remove it. Press the drive
buttons and on the LCP for at least 5 sec. until both LED
flash simultaneously.
For the removal proceed as follows:
1. Switch-off the power supply and disconnect the plug.
2. Loosen the 4 fastening screws
3. Pull the electronic unit slightly apart.
1 .

Covers

A Screws
Figure 21: Exemplary cover
Terminal covers and other components at the Contrac actuators
and electronic units are fastened with 4 or more screws (only 2
screws for local control panel cover).
In some cases, they are additionally sealed with a soft rubber
gasket. In order to avoid a gap between the housing and the
cover (or the other component) tighten these screws evenly
crosswise according to the order in the basic sketch in Figure 34
to get an even load.
Start with one screw and tighten it slightly. Then tighten the 2nd,
opposite screw in the same manner. Continue with the
remaining screws. Finally tighten the screws in the same order.
This will ensure a tight seal.
B Cover or similar component
15