HSF (M) 600W 042315
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1.
INTRODUCTION
1.1
SCOPE OF MANUAL
This Operator's Manual covers the installation and operation of the Kepco HSF 600W Series,
Models M and MZ, of Metered Switching Power Supplies. For service information, write directly to:
Kepco Inc., 131-38 Sanford Avenue, Flushing, New York, 11355, U.S.A. Please state Model Des-
ignation and Serial Number of your HSF Power Supply. This information can be found on the
nameplate of the unit.
1.2
DESCRIPTION
The Kepco HSF 600 Watt Series M and MZ models are hot swappable, high frequency switching,
plug-in power supplies that are completely interchangeable with the non-metered HSF Series
(except where noted, this manual applies to both M and MZ Models). Five models may be
selected for outputs of 12V, 15V, 24V, 28V or 48V. They employ forward conversion and power
factor correction and are designed to operate in a fault tolerant power system with a nominal a-c
input of 100V a-c to 240V a-c (input voltage range 85 to 264 Va-c), 50-60 Hz (input frequency
range 47-440Hz). A built-in current balancing circuit and OR-ing diodes allow configuration for
hot-swap and parallel-redundant N+1 operation. RoHS-compliant models are indicated by HSF*
(e.g., HSF*28-23M)
The HSF M Models use the HSF output to power the VDC ON indicator, internal alarm relay, and
the meter. A minimum HSF output voltage is needed to maintain functionality for these compo-
nents.
The HSF MZ Models use an auxiliary internal power supply to power the internal relay and the
meter, allowing the output voltage to be adjusted down to zero without affecting meter or alarm
performance. The default configuration of MZ models uses an internal reference voltage to power
the VDC ON indicator. An option is provided which allows the VDC ON indicator to be powered by
the HSF output, requiring a minimum voltage to maintain functionality of the indicator.
These power supplies are designed to be used with Kepco's Series RA 19-4C rack adapters. The
RA 19-4C rack adapter accepts up to four 600W modules. All input/output connections are
through a 24-pin connector that plugs in to the rack adapter. All external connections described in
the following paragraphs are made through the rack adapter’s I/O connector (see Figure 1).
FIGURE 1. HSF REAR PANEL CONNECTOR AND RA 19-4C RACK ADAPTER I/O CONNECTOR
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21 20 19
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