User`s guide

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
The DC terminal block features two bus inputs as shown in
Figure 4.1. This allows the user to connect only one DC power
source, or connect two DC power sources where the second
source functions as a backup. When connecting the APS-8M to
your DC power source, first remove the protective cover from
the terminal block, attach the wires from the -48V DC 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)