KEPCO RA 19-8B Quick Start Guide - Manual (Page 3)

KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
http://www.kepcopower.com email: [email protected]
080309 228-1681
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II — PRE-INSTALLATION.
NOTE: Either local or remote sensing MUST
be used. For independent operation
configure the DIP switches. For paral-
lel operation use external wires
DIP SWITCHES. Each slot has one DIP switch (see
Figure 3): DIP 1 is for PS1 sense lines; DIP 2 is for PS2
sense lines and for paralleling PS1 and PS2. The rest of
the DIP switches are similar to DIP 2, each configuring the
sense lines for that slot and for paralleling the adjacent
(lower number) slot. Table 1 describes the function of each
DIP switch position. See below to access the DIP switches.
ACCESSING DIP SWITCHES. The DIP switches
(Figure 3) are accessible either a) from the front without
disassembly by using a long flat-tip screwdriver after
removing all power supplies from the rack, or b) by sepa-
rating the rear panel from the chassis as described below:
1. Remove all power supplies from the rack adapter.
2. Remove eight hex spacers securing the four I/O connec-
tors to the rear panel.
3. Remove four screws (two at the top and two at the bot-
tom) securing the rear panel to the chassis and separate
the rear panel from the chassis. It is not necessary to
remove the ground connection (if present) between the
rear panel and the chassis.
4. Remove seven screws (three at the top and four at the
bottom) securing the back plate to the chassis and
remove the rear panel to gain access to the interior com-
ponents.
OPTIONAL KEYING: HSF power supplies are keyed
by voltage at the factory. A keyway can be established at
the rack adapter by installing a key pin (supplied) into the
corresponding hole as indicated in Figure 3 so that the pins
match the open holes of the power supply. Secure with
mounting nut at the rear panel using two 1/4-inch nutdriv-
ers or deep sockets. DO NOT ALTER THE KEYING ON
THE POWER SUPPLY.
INDEPENDENT OPERATION. The RA 19-(X)B rack
adapter is shipped with the DIP switches of all slots config-
ured for independent operation (see Figure 3) and local
sensing. Refer to RA 19-(X)B manual for remote sensing.
TABLE 1. REAR PANEL (INTERIOR) DIP SWITCH FUNCTIONS
DIP
SWITCH
POSITION
FUNCTION DIP SWITCH SETTINGS
1, 2
Local /
Remote
Sensing
Selection
Position 1 connects +V+ to +S, Position 2 connects –V to –S.
Both required ON (factory default) for independent operation with Local Sensing.
Both required OFF for:
a) Independent configurations using Remote Sensing.
b) Independent configurations using Local Sensing with user supplied connections from +V+ to +S and –V to –S.
c) All parallel configurations (sensing must be established using external wires).
d) All series connections.
3, 4
(SEE
NOTE)
Connect
Sense
+ and –
in parallel
Position 3 connects +S to adjacent slot +S, Position 4 connects –S to adjacent slot –S.
Both required OFF (factory default) for all configurations except parallel configurations using DIP switch settings to con-
nect the sense leads in parallel.
Both required ON for parallel configurations using DIP switch settings to connect the sense leads in parallel.
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Current
Balance
(forced
current
share)
Required ON for parallel operation with forced current share (connects current share lines in parallel) unless connec-
tions are made via external wires
Required OFF (factory default) for
a) independent and series configurations.
b) Parallel configurations using external wires at I/O connector to connect CSB (current share bus) lines in parallel.
c) Parallel configurations without forced current sharing (current balancing),
6, 7
Close on
Failure
Alarm
When set to OFF (factory default), individual power supplies produce closure between I/O connector N.O. and COM
pins upon failure.
When set to ON, parallels N.O pins of adjacent slots to allow a single alarm to provide failure indication (contact closure
between N.O. pin and COM pin) if any one of many power supplies fails.
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Open on
Failure
Alarm
When set to OFF (factory default), individual power supplies produce open between I/O connector N.C. and COM pins
upon failure.
When set to ON, connects N.C to COM between adjacent slots so that individual alarms are connected in series. This
allows a single alarm to provide failure indication (contact open between N.C. pin and COM pin) if any one of many
power supplies fails.