Model 458-3SL (3-Slot Chassis) Rev A
Page 32
7.0 AC-Input Voltage Selection
Instructions
The factory default AC input voltage is 120 V. When changing the AC input voltage, the fuse
configuration must also be changed. This is accomplished by inserting the correct fuse(s) into the
appropriate side of a fuse block and by setting a voltage card with a pin.
Unplug the power cord and open the power connector cover by carefully inserting the tip of a small
screwdriver (or similar tool) into the gap between the cover and the power connector. Gently pry the
fuse block out with the tip of the screwdriver.
AC Input Voltage Selection
There are four selectable positions, each representing a voltage range. The chart below shows the
AC input voltage range for each position.
Selected Position
Input Range
100 V
87.0 – 110.0
120 V
104.4 – 132.0
230 V
191.4 – 242.0
240 V
207.0 – 264.0
Fuse Changing
230 V, 240 V Configuration*
*
230-V and 240-V systems use two 250-V, 0.1250-A Time-logs fuses 5 x 20 mm
Circular slot will align with
post inside fuse housing
during installation.
Two fuses are
inserted into the side
with two fuse holders.
