8
228-1550 REV 17
081721
KEPCO, INC.
131-38 SANFORD AVENUE
FLUSHING, NY. 11355 U.S.A.
TEL (718) 461-7000
FAX (718) 767-1102
www.kepcopower.com
email: [email protected]
V — INSTALLATION
MOUNTING THE POWER SUPPLY.
Refer to Fig-
ure 2 and insert power supply into selected slot of RA 19-
(X)B Rack adapter until power supply front panel is flush
with rack adapter chassis and secure with front panel Phil-
lips head mounting screw.
CONNECTIONS.
All connections are made at the rear
panel of the RA 19-(X)B Rack Adapter (see applicable RA
19-(X)B Operator Manual). Connect the load to the appli-
cable ± DC OUTPUT terminals. AC input power to each
slot is applied via two INPUT POWER terminal blocks as
indicated on the rack adapter rear panel. Make sure to
connect the AC input Neutral, Line and Ground wires to
the respective terminals of the terminal blocks.
REMOVAL.
To remove a power supply, first use the
POWER switch to turn off the unit. Then loosen the
mounting screw and extract the unit from the RA 19-(X)B
Rack Adapter.
VI — OPERATION
Turn the unit on using the front panel POWER switch (see
Figure 5).
CAUTION: DO NOT repeatedly toggle the
POWER on/off switch as this may cause unit to fault.
When output voltage is available, the green VDC ON LED
is on. While monitoring output voltage at the front panel
test points, the Output Voltage Adjust trimmer allows
adjustment of the output voltage.
FIGURE 5. COMPONENT LOCATIONS
Master/slave parallel configurations of one or more power
supplies are covered in the applicable RA 19-(X)B Rack
Adapter manual.
The MASTER ON LED (amber) goes on under any of the
following three conditions:
• Independent operation.
• Operation in a parallel master/slave configuration
to indicate which unit is the master
• Operation in a parallel master/slave configuration
to indicate that a slave unit is no longer within the
proper specifications for paralleled units. Slave 1
should be optimally adjusted to 40mV less than
master, slave 2 adjusted to 40mV less than slave
1, etc. The maximum allowable difference
between paralleled units is 250mv. The minimum
allowable difference between paralleled units is
25mV. If a slave exceeds these limits, the MAS-
TER ON light goes on.
NOTES:
1.
MASTER ON LED not used on 3.3V model: always
OFF.
2.
HSF models also share current when all units are
adjusted to the same output voltage, however MAS-
TER ON indicator may be lit on all units in parallel.
Additional information for various parallel and alarm con-
figurations can be found in the applicable RA 19 Rack
Adapter manual referenced on page 1.
