Getting Started
Page 7
3. OPERATION
3.1 Powering On the DLS 50
Before switching on the DLS 50, verify that the line voltage selection shown at the back
of the unit corresponds to the local line voltage. If it is different, then do the following:
• Remove the power cord
• Open the fuse box cover in the power module at the back using a small flat
screwdriver
• Pull the voltage selector card
• Turn the plastic knob until you have selected your local power voltage
• Put everything back together
• Check that the white dot is now beside your local line voltage.
The DLS 50 uses a two fuse configuration.
To operate the DLS 50, connect the unit to the power source, and turn on the unit.
One convenient feature of the DLS 50 is that the last configuration used is kept latched
into the relays, allowing the unit to be used even when the power is turned off. As an
option, the wireline length may be restored or reset to zero. There will be a short
disconnection at power up while performing the self-test.
On power up, the DLS 50 performs a self-test, and will show for about two seconds the
following screen:
DLS 50 PwrOn: EPROM: WireLn:
SelfTest DipSw: NVRAM:
µ - Ctrl:
Fig. 3.1: Self-Test Screen
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