KEPCO RA 59 - Manual (Page 15)

RA 59 051313
2-5
2.7.3.2 D-C SOURCE POWER
For d-c source power, wire the rack adapter in accordance with the instructions for single-phase
a-c power per Para. 2.7.3.1. Contact Kepco Applications Engineering for additional restrictions
imposed by d-c source power.
2.7.4 CONTROL SIGNAL CONNECTIONS
Access to the control signal (l/O) connector for each HSP power supply is provided via the four
37.pin D-subminiature connectors on the rear panel of the rack adapter (see Figure 2-2). Four
mating connectors (Kepco PN 142-0422) are provided in a plastic bag. These connectors are
simply extensions of the identical connectors located on the HSP power supplies. Consult the
HSP operator’s manual for instructions on wiring and use of these control lines.
2.7.5 OUTPUT LOAD CONNECTIONS
Load connections to the rack adapter is achieved via the stud pairs located on the rear panel
directly behind each mounting position (see Figure 2-2). Required hardware for attaching out-
put cables are assembled to the output studs. The RA 59 rack adapter employs a modular bus
bar system to permit a variety of load configurations; it is shipped with all four positions config-
ured for independent operation. The following sections describe additional output bus bar con-
figurations available with the RA 59 rack adapter. Additional information regarding these and
other load interface requirements are contained in the HSP operators manual.
NOTE!
REGARDLESS OF OUTPUT CONFIGURATION, OUTPUT SENSE
LINES MUST BE PROPERLY CONNECTED FOR OPERATION
(REFER TO HSP OPERATOR’S MANUAL).
2.7.5.1 PARALLEL/REDUNDANT OPERATION
Adjacent positions of the RA 59 rack adapter can be reconfigured for parallel/redundant opera-
tion by installing optional bus bar links as shown in Figure 2.4. Load wiring is attached to the
rack adapter at the output studs. Although load wiring can be attached to any single position,
Kepco strongly recommends distributing the load interface evenly among the populated power
supply positions to minimize load sharing error; in no case should load current drawn from any
one terminal exceed 300 Amperes. All four load connections must be used when the 3.3 volt
and 5 volt modules are used. Consult HSP operators manual for additional information regard-
ing parallel/ redundant load operation.
2.7.5.2 SERIES/INDEPENDENT OPERATION
The RA 59 rack adapter can be configured for series operation of HSP power supplies by install-
ing a jumper cable from the negative bus bar of one independent position to the positive bus bar
of the adjacent independent position for as many positions as required. Consult the HSP opera-
tors manual for additional information regarding series operation; contact Kepco Applications
Engineering for additional information.
2.7.5.3 MIXED OPERATION
The design of the RA 59 permits the user to configure HSP power supplies for almost any com-
bination of independent, series and parallel operation, both within a single rack adapter and
between different RA 59 rack adapters, within the limits of the HSP operation envelope. The