HSF-A 1500W 010421
1
1.
INTRODUCTION
1.1
SCOPE OF MANUAL
This Operator's Manual covers the installation and operation of the Kepco HSF-A 1500W Series
of 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 Designation and Serial Number of
your HSF Power Supply (see nameplate of the unit).
1.2
DESCRIPTION
The Kepco HSF-A 1500 Watt Series are hot swappable, plug-in power supplies. Metered models
(M suffix) are completely interchangeable with the non-metered HSF-A 1500W Series. Four mod-
els may be selected for outputs of 24V, 36V, 48V or 60V. They employ forward conversion and
power factor correction and are designed to operate in a fault tolerant power system with a nomi-
nal a-c input of 100V a-c to 240V a-c (input voltage range 85 to 265V a-c), 50-60Hz (input fre-
quency range 47-63Hz). A built-in current balancing circuit and OR-ing diodes allow configuration
for hot-swap and parallel-redundant N+1 operation.
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 modules. All input/output connections are through a 24-
pin connector that plugs in to the rack adapter. All external connections are made through the rack
adapter’s I/O connector (see Figure 1).
An optional meter (M suffix) provides digital indication of voltage or current (switch selectable)
from the front panel. RoHS-compliant models indicated by HSF* (e.g., HSF 24*50AM).
FIGURE 1. RA 19-4C RACK ADAPTER I/O CONNECTOR
TABLE 1. REAR CONNECTOR PIN ASSIGNMENTS
Signal
Name
Pin
Function
1, 2, 4
DC output (+) applied to load.
Output –
3, 5, 6
DC Output (–) applied to load.
IMON+
8
Current (used on C and M suffix only).
NO
10
Normally Open contact of alarm relay, referenced to AL COM, pin 14 (see PAR. 3.8.2).
IMON–
11
Current Monitor– (used on C and M suffix only).
COM
12
Signal Common - return for AUX 5V pin 15, RV pin 18 and CSB pin 17.
NC
13
Normally Closed contact of alarm relay, referenced to AL COM, pin 14 (see PAR. 3.8.2).
AL COM
14
Common contact of alarm relay (see PAR. 3.8.2).
AUX 5V
15
+5V supply for optional I
2
C communication when enabled by DIP switch SW1 position 1 Return is COM
(pin 12, 19, or 21)
Caution:
Not short circuit protected!
+PF
16
+Power Fail of open-collector alarm circuit. Used with COM, pin 19 (see PAR. 3.8.2).
CSB
17
Current Share Bus - Used whenever several power supplies are connected in parallel (see PAR. 5.).
RV
18
Remote Voltage - Return is COM (pin 12, 19, or 21) Used for remotely controlling the output voltage (see
PAR. 3.4.2)
COM
19
Signal Common - return for AUX 5V pin 15, RV pin 18 and CSB pin 17.
3044526
7
8
2
4
5
6
3
1
+IMON
CSB
-RC (COM)
ALARM (NO)
ALARM (NC)
REF
+PF
(NOT USED)
15
9
12
13
14
11
10
+RC
-IMON
(NOT USED)
ALARM (COM)
-PF
-COM (COM)
RV
NOTE: PINS 8 AND 10 ARE
DESIGNATED "COM" FOR
HSF-A 1500W ONLY.
SEE NOTE
SEE NOTE
