7
Operation
Turn the switch on the top of the unit on to energize the outputs. The green indicator light will glow to
indicate the proper operation of the unit.
The unit is equipped with a dry contact output fail relay. The contacts on the relay are
accessed through a connector on the back of the unit.
Output Fail Relay
LOAD SHARE OPTION
The units may be configured for load sharing if they are equipped with the optional output
isolation diodes. To confirm that your unit has these diodes, use an ohmmeter to measure the
resistance between one of the positive output terminals and one of the negative terminals.
If the diodes are present the terminals will measure as not connected. If the diodes are NOT
present, the terminals will measure the static load resistance. Value depends on the output
voltage of the unit. Assuming the output isolation diodes are present, connect one 4 foot
piece of #14 AWG red wire to each positive output terminal. Connect all the positive wires
to a distribution bus, or connect them together, and then connect from the common point
to the load using the correct gauge of wire for the total output capability of all the supplies
running in parallel. Repeat this process for the negative terminals using the same gauges of
wire, but black in colour. These units should now load share. You can confirm this by watching
the output ammeters. A slight difference is negligible, however, if this is not the case,
you can increase the output voltage of the unit that is reading low using the output adjust
potentiometer.
OUTPUT 1
OUTPUT 1
OUTPUT 2
OUTPUT 2
