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4. Hardware Installation
4.1. Connecting Power to the APS Unit
The APS is available in both AC and DC powered versions. When connecting AC or DC power
to the APS, proceed as follows:
CAUTION: This device should only be operated with the type of power source
indicated on the instrument nameplate. If you are not sure of the type of power
service available, please contact your local power company.
4.1.1. AC Powered Units
The Voltage Selector Switch on the instrument back panel is used to set the unit for 115V or
230V AC power. Plug the supplied power cable into the receptacle on the APS back panel and
then connect the power cable to a grounded AC outlet.
4.1.2. DC Powered Units
When connecting the APS to your DC power source, first remove the protective cover from the
DC terminal block, attach the wires from the -48 VDC power source to the screw terminals,
connect your ground line to the labeled ground screw, and then replace the protective cover.
4-1
Figure 4.1: Terminal Block Assembly (DC Units Only)