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or down to ensure full engagement and disengagement of
the latching mechanism. When the HSF-A is not installed
in its plug-in rack adapter, it is recommended that the latch
be secured in the open (up) position to prevent damage.
CONNECTIONS. All connections are made at the rear
panel of the RA 19-4C Rack Adapter (see RA 19-4C
Operator Manual).
TEST POINT (±) Connect to external
voltmeter to monitor d-c output voltage.
Voltage/Current Meter (M Suffix only)
Monitors output voltage or current per
Meter Mode switch. R emote sensing required
for voltmeter to display voltage at the load.
V (Voltage) indicator (M Suffix only)
Lights green when meter shows Volts.
Meter Mode slide switch (M Suffix only)
Set to V to show output voltage on meter,
set to A to show output current.
A (Amperes) indicator (M Suffix only)
Lights amber when meter shows Amperes .
3044522
III — OPERATION
Turn the unit on using the front panel POWER switch (see
Figure 2). CAUTION: DO NOT repeatedly toggle the
POWER on/off switch as this may cause unit to fault.
When output voltage is within range specified in applica-
ble Operator Manual, the VDC ON LED is on (green). The
VDC ON indicator can be configured to light red to indi-
cate a loss of output voltage (see applicable Operator
manual.
While monitoring output voltage at the front panel test
points, the V ADJ Output Voltage Adjust trimmer allows
adjustment of the output voltage. The unit can also be
configured to control output voltage using a remote resis-
tance or voltage (see applicable Operator's manual refer-
enced on page 1).
The OUTPUT RESET switch can be used to recycle
power in the event of an alarm condition. This switch does
not function if the remote on/off feature has been enabled
(see applicable Operator manual).
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
2
FIGURE 2. COMPONENT LOCATIONS
www.kepcopower.com email: hq@kepcopower.com
228-1931 REV 1
REMOVAL. To remove a power supply, first use the
POWER switch to turn off the unit. Release the two cap
head screw retaining latches (see Figure 2) by loosening
the cap-head screw approximately 1/2 turn CCW (use 5/
32" hex key) and slide to the open (up) position. Then
extract the unit from the RA 19-4C Rack Adapter. CAU-
TION: The ON/OFF switch must be set to OFF before
removing the unit from the rack adapter. Leave the
latches in the open position when not installed.
VDC ON/ALARM Indicator Lights green when
unit is operating. When enabled by DIP switch
configuration, lights red to indicate loss of
output voltage in parallel configuration only.
V. ADJ Output Voltage Adjustment Trimmer:
Adjusts output voltage. Not functional if
remote voltage control is enabled .
OUTPUT RESET switch Used to recycle
power in the event of an alarm condition.
Not functional when remote on/off control
is enabled.
POWER ON/OFF switch Applies power
to the unit. CAUTION: Power must be
OFF before unit is removed from the
rack adapter.
Retaining Latches (2) Prevents inadvertent
removal of unit from rack adapter.
M models include a meter which can display either output
voltage or current depending on the position of the Meter
Mode slide switch. A corresponding indicator V (green) for
Volts or A (amber) for Amperes lights to show which meter
mode is selected.
The following features of the HSF 1500W power supplies
are covered in the applicable Operator manual:
• Parallel Operation (Note that parallel operation
requiring current balancing (forced current sharing)
must use either all -A or all non-A 1500W models).
• Remote On/Off and Voltage adjustment
• Protection Circuits
• Alarms
• Keying
• Options
072821
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