6
228-1568 REV 8
083013
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]
IV — INSTALLATION
MOUNTING THE POWER SUPPLY.
Refer to Figure
6 and insert HSF-1UR power supply in selected slot until
power supply front panel is flush with rack adapter chassis
and secure with two front panel mounting screws.
CAUTION: Do not overtighten these screws: max.
torque is 2 in.-lbs (0.23 N x m).
CONNECTIONS.
All connections are made at the rear
panel of the RA 19-1U Rack Adapter (see RA 19-1U
Operator Manual). Connect the load to the applicable ±
DC OUTPUT terminals. AC input power is applied via two
INPUT POWER terminal blocks: one supplying slots 2
and 4, the other supplying slots 1 and 3. 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 two
mounting screws and extract the unit from the RA 19-1U
Rack Adapter.
CAUTION: The ON/OFF switch must be
set to OFF before removing the unit from the rack
adapter
.
V — OPERATION
Turn the unit on using the front panel POWER switch (see
Figure 6).
CAUTION: DO NOT repeatedly toggle the
POWER on/off switch as this may cause unit to fault.
When output voltage is available, the VDC ON LED is on
(green). For 100W and 150W 5V through 48V models the
VDC ON LED lights red to indicate a fan malfunction. The
100W 3.3V model and all 50W models use convection
cooling and do not include a fan.
While monitoring output voltage at the front panel test
points, the Output Voltage Adjust trimmer allows adjust-
ment of the output voltage.
The 3.3V models do not use forced current sharing so the
MASTER ON LED is always off. The MASTER ON LED
for 5V through 48V models goes on under any of the three
following 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.
FIGURE 6. COMPONENT LOCATIONS
3043412
POWER
SWITCH
TEST
POINTS
VOLTAGE
ADJUST
TRIMMER
MASTER
ON
LED
VDC
ON
LED
MOUNTING
SCREW
MOUNTING
SCREW
NOTE: MOUNTING SCREW MAX TORQUE: 2 IN.-LBS. (0.23 N x m)
