User guide

Voltage Selector
The 2108 can operate at 120 V or 240 V. To change the mode, unplug the AC power
cord from the DC-30 Power Supply. Remove the top cover. Looking down on the unit,
locate the round Power Transformer at the front of the unit. Unplug the transformer connector
with the larger wires and reconnect it to the appropriate headed as shown in Figure 4. This
figure shows the unit configured for 240 volt operation. When changing the operating
voltage the fuse must be changed as well (see fuse/mains below). It is very
important to only move the connector that is plugged in to the header that is marked 120V or
240V. Do not move the connector shown to the left on the photo below. Make sure the DC-
30 Power Supply is properly set for the voltage in your area before applying AC power to
unit!
AC Power
The DC-30 uses a standard, detachable IEC power cable.
Fuse/Mains
The AC power fuse is located in the AC power connector block. Remove the power cord
before checking or changing the fuse. A 400 mA time delay (slow blow) fuse is required for
operation at 120 V. A 200 mA time delay (slow blow) fuse is required for operation at 240 V.
Figure 4: Operating Voltage Selector
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