American Magnetics 420 Power Supply Programmer - Manual (Page 32)

14 Rev. 7
Installation
Power Requirements
Warning
Do not remove the cabinet feet and then reinsert the original screws.
Doing so could present a severe life-threatening electrical hazard. If
removal of the cabinet feet is desired, omit replacing the screws or
replace the original screws with screws not to exceed 1/4" in length.
If the instrument is to be rack mounted, follow the following steps:
1. Attach the rack mount adapter pieces to the instrument by first
removing the four screws on the side of the instrument that attach
the cover to the chassis. Attach the rack mount adapter pieces to
the sides of the instrument by reinstalling the screws.
2. Install the Model 420 in a 19" wide instrument rack by securing the
front panel to the rail in each of the four corners with mounting
hardware supplied by the cabinet manufacturer.
2.3 Power Requirements
Warning
The Model 420 operates on 50-60 Hz power and may be configured
for 100-120 or 200-240 VAC. The power requirement for each
instrument is marked on the rear panel of the instrument adjacent
to the power entry module. Be sure your instrument is configured for
your power source prior to plugging in the line cord. Do not fail to
connect the input ground terminal securely to an external earth
ground.
Ensure the front panel power switch is in the OFF ( 2 ) position. Verify that
the instrument is configured for the proper operating voltage by referring
to the label adjacent to the power entry module on the rear panel of the
instrument. If the operating voltage is correct, plug the line cord into the
appropriate power receptacle.
If the instrument operating voltage needs to be changed, ensure the
instrument is de-energized by disconnecting the power cord from the
power source. Remove the instrument cover by removing the four button
head capscrews on both sides of the cover (3/32" allen driver required) and
the four button head capscrews from the corners of the cover on the back
panel (5/64" allen driver required) and slide the voltage selector switch on
the main printed circuit board to the proper voltage. Replace the
instrument cover.
Note
The voltage selector switch is labeled “115” for nominal line voltages
from 100 to 120 VAC. The switch is labeled “230” for nominal line
voltages of 200 to 240 VAC.