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66 PI-MTE System Manual Version 4.C
To Change Voltage and Fuse Configuration:
Before opening the power module, turn the Controller OFF and unplug the power cord.
1. Verify that the power supply is turned
OFF and the power cord is unplugged.
2. As shown in Figure 25, place the flat
side of a flat bladed screwdriver
parallel to the back of the Controller
and behind the small tab at the top of
the power module, and twist the
screwdriver slowly but firmly to pop
the module open.
120Vac
~
Figure 25. Power Module
Figure 26. Voltage Selector Drum
Figure 27. Fuse Holder
3. To change the voltage setting, roll the
selector drum until the setting that is
closest to the actual line voltage is
facing outwards.
4. Turn the drum to the desired voltage
and put the drum back into the module
with that setting facing straight out of
the module.
5. Confirm the fuse ratings by removing the
two white fuse holders. To do so, simply
insert the flat blade of the screwdriver
behind the front tab of each fuse holder
and gently pry the assembly out.
6. Refer to Table 6 or the Fuse/Voltage label (above or below the Power Module) to
determine which fuses are required by the selected voltage. If the Controller power switch
is on the back of the ST-133, the Fuse/Voltage label is located below the Power Module.
7. After inspecting and, if necessary, changing the fuses to those required by
the selected voltage, reinstall the holders with the arrow facing to the
right.
8. Close the power module and verify that the correct voltage setting is
displayed. For example, if you wanted 220 VAC, you should see 220 Vac
in the window.
9. Verify that the Controller power switch is in the OFF position and then plug the
power cord back into the power module.
WARNING!