KEPCO RA 19-4C Quick Start Guide - Manual

©2009, KEPCO, INC 1
Data subject to change without notice 228-1671 REV 1
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Q U I C K S T A R T G U I D E
KEPCO
An ISO 9001 Company.
RA 19-4C
Rack Adapter
RA 19-4C
RACK ADAPTER
I — INTRODUCTION
SCOPE OF MANUAL. This Quick Start Guide covers
installation and operation of the Kepco RA 19-4C Rack
Adapter for two common configurations. For the full capa-
bilities and specifications of the RA 19-4C and to take
advantage of the many choices and features not covered in
this Quick Start Guide, the user is urged to download the
complete Operator’s Manual from the Kepco web site at
www.kepcopower.com/support/opmanls.htm#ra19-4c.
DESCRIPTION. Kepco RA 19-4C rack adapters are
specifically designed for up to four 300W, 600W, 1200W/
1500W HSF power supplies.
The rack adapter is user-configurable for parallel, series, or
independent power supply operation. Forced current shar-
ing and OR’ing diodes for N+1 redundancy are built into the
HSF power supplies. Redundant a-c inputs are provided to
deliver independent source power to each power supply in
a redundant pair. User-configurable keying can ensure that
only the correct power supply can be installed in a keyed
slot. Input/output connections between RA 19-4C and HSF
power supply are via HSF connectors that plug into corre-
sponding connectors of the RA 19-4C. All connections are
made at the rear panel (see Figure 1).
FIGURE 1. REAR PANEL CONNECTIONS, TYPICAL FOR EACH SLOT
II — PRE-INSTALLATION
NOTE: For HSF 300W and 600W either local
or remote sensing MUST be used;
sense connections are not used for
HSF 1200W/1500W.
DIP SWITCHES. The DIP switches (Figure 1) are
arranged as follows: DIP 1 is for PS1 sense lines; DIP 2 is
for PS2 sense lines and for paralleling PS1 and PS2. DIP 3
is for PS3 sense lines and for paralleling PS2 and PS3. DIP
4 is for PS4 sense lines and for paralleling PS3 and PS4.
Table 1 describes the function of each DIP switch position.
INDEPENDENT OPERATION. The RA 19-4C rack
adapter is shipped with the DIP switches of all slots config-
ured for independent operation (see Figure 1) and local
sensing. If HSF 1200W/1500W units are to be installed,
DIP switch positions 1 through 4 to OFF are not functional
since sense connections are not used.
PARALLEL OPERATION. The most common use for
the RA 19-4C rack adapter is with two or more HSF’s con-
nected in parallel to a single load with forced current shar-
ing to increase current output, increase reliability and/or
provide redundancy. Only adjacent slots can be connected
in parallel using DIP switches.