OPERATOR MANUAL
KEPCO
An ISO 9001 Company.
KDN
SINGLE OUTPUT
24V DIN RAIL POWER SUPPLIES
I — INTRODUCTION
SCOPE OF MANUAL. This instruction manual covers the
installation and operation of the Kepco KDN Series of
(Reduction of Hazardous Substances) compliant
Switching Power Supplies.
RoHS
24V
DESCRIPTION. The Kepco KDN 24V Din Rail Series con-
sists of three models of switching power supplies rated at 5A,
10A and 20A, each with a single 24V output as shown in Table
1. Units may be operated with a nominal 100V a-c to 240V a-c
(input voltage range 90 to 264 Va-c), 50-60 Hz (input fre-
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, KDN SERIES
OUTPUT
(Nominal
MODEL
KDN 24-5
KDN 24-10
KDN 24-20
(1) One minute minimum duration @ 25°C ambient. The total RMS output current and power shall be kept within rated values.
(2) Bandwidth 15 MHz. Full load, nominal line, output terminated with 0.47
(3) To restart (reset) the unit, removed a-c input power, wait approximately 40 seconds, then restore a-c input power.
(4) Hiccup mode with auto recovery.
Volts)
ADJUSTMENT
RANGE
(Volts)
24 23.5 - 28 29-34 0 5 6 87% 90%
24 23.5 - 28 32 - 38 0 10 12 85% 90%
24 23.5 - 28 31.5 - 35.5 0 20 25 85% 90%
OVP
RANGE
(Volts)
(3)
OUTPUT CURRENT
(Amperes)
Min. Rated Peak
quency range 47-63Hz. These units employ active PFC
(Power Factor Correction) using ZVS (Zero Voltage Switching). Overvoltage protection and current limiting with automatic
recovery from short circuit are featured. Units are convection
cooled.
II — SPECIFICATIONS
The following specifications are at nominal input voltages and
25°C and apply to all models unless otherwise specified.
EFFICIENCY
(typical)
(1)
115V a-c 230V a-c Limit (Typical) Short Circuit
µF capacitor.
CURRENT LIMIT PROTECTION
(Amperes)
(4) (4)
7.8
(4) (4)
14
(4) (4)
28
Series
RIPPLE/NOISE
(2)
(mV p-p)
<40
<50
<240
INPUT CHARACTERISTICS:
INPUT VOLTAGE:
Nominal 100-240V a-c,
Range: 90-264V a-c, 125-370V d-c: polarity insensitive.
NOTE: Safety agency approval applies only to a-c input
operation.
INPUT SOURCE FREQUENCY:
Range 47-63 Hz (Units operate up to 440 Hz, however the
leakage current exceeds the UL leakage safety specification limit, and power factor and efficiency specifications
may not be met.))
INPUT CURRENT:
KDN 24-5: <2A @115V a-c, <1A @ 230V a-c
KDN 24-10: <6A @115V a-c, <2.6A @ 230V a-c
KDN 24-20: <10A @115V a-c, <5A @ 230V a-c
INPUT SURGE: An inrush current liming resistor reduces
start-up surge. Cold start 25 °C:
30A max. @ 115V a-c, 60A max. @ 230V a-c
LEAKAGE CURRENT:
Line to ground, input: 115V a-c, 60Hz
KDN 24-5: <0.2mA
KDN 24-10: <0.25mA
KDN 24-20: <0.35mA
POWER FACTOR: Meets EN 61000-3-2, Class D
115V a-c: 0.99
130V a-c: 0.95
SWITCHING FREQUENCY:
KDN 24-5: 120KHz
KDN 24-10: 120KHz
KDN 24-20: 62KHz
INPUT PROTECTION: Units are protected against shorts
by an input fuse. Fuse value 10A, 250V.
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
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©2013, KEPCO, INC 1
Data subject to change without notice 228-1674 REV 2
OUTPUT CHARACTERISTICS:
GENERAL CHARACTERISTICS
SOURCE EFFECT:
±10%, rated load
±1% @ 115V a-c and 230V a-c,
LOAD EFFECT:
KDN 24-5: ±1% max. from 0 to 5A
KDN 24-10: ±2% max. from 0 to 10A
KDN 24-20: ±1% max. from 12A down to 4A and from
12A up to 20A
SETTING TOLERANCE: ±2%
TRANSIENT RECOVERY: Excursion produced by step
load change from 20% to 100% and 100% to 20@:
KDN 24-5: 100mV max., 1mS max. recovery
KDN 24-10: 200mV max., 1mS max. recovery
KDN 24-20: 1V max., 1mS max. recovery
START UP TIME:
KDN 24-5: 1.7S typ @ 115V a-c, <1S @ 230V a-c
KDN 24-10: 1.9S typ @ 115V a-c, <1S @ 230V a-c
KDN 24-20: 1.8S typ @ 115V a-c, <1S @ 230V a-c
HOLD UP TIME: 115V a-c input voltage, rated load: >20
milliseconds typical (measured from end of last charging
pulse to when output drops to 95%)
EFFICIENCY:
KDN 24-5: 87% (typ.)
KDN 24-10: 85% (typ.)
KDN 24-20: 85% (typ.)
POWER OK INDICATOR: OFF when unit in overcurrent
protection, a-c input is off, and as follows:
KDN 24-5: Output voltage <15V d-c
KDN 24-10: Output voltage <20.5V to 23.5V d-c
KDN 24-20: Output voltage <11 to 13V d-c
ENVIRONMENTAL CHARACTERISTICS
MTBF:
Per MIL HDBK 217F (GB), 230V a-c line, 40°C:
KDN 24-5: 260,000h @ 24V d-c, 5A
KDN 24-10: 425,000h @ 24V d-c, 10A
KDN 24-20: 310,000h @ 24V d-c, 20A
OVERVOLTAGE PROTECTION: When output voltage
exceeds OVP value (see Table 1) output is cut off to protect
the load. To reset, briefly remove, then restore, a-c input
power.
OVERCURRENT PROTECTION: Power supply enters
hiccup mode if short circuit or overcurrent condition exists;
recovery is automatic when cause is removed.
EMC - EMISSIONS: Designed to meet:
Radiated Noise 30MHZ to 1GHz:
FCC docket 20780 Class B, EN55022-B
Conducted Noise 0.15MHz to 30MHz:
FCC Class B, EN55022-B
Input Harmonics (on AC Mains) 0 to 2KHz:
EN 61000-3-2 Class D
EMC - IMMUNITY:
ESD (6KV contact discharge, 8KV air discharge):
EN 61000-4-2
Radiated Field:
EN 61000-4-3 (10mV, Criteria B)
Electrical Fast Transient/Burst (EFT):
EN 61000-4-4 (2KV)
Surge:
EN 61000-4-5 (4KV)
Conducted Noise:
EN 61000-4-6 (Criteria A)
Power Frequency Magnetic Field:
EN 61000-4-8 (Criteria A)
Voltage Dips, Short Interruptions, Voltage Variation:
EN 61000-4-11
SAFETY: All units are UL 508 listed and are designed to
meet UL 1950, CSA 22.2 No. 950-M90 and EN 60950. KDN
units are CE marked per the Low Voltage Directive (LVD), EN
60950.
OPERATING TEMPERATURE:
perature derating. Do not allow the power supply vents to
become dust covered because that will decrease the cooling
efficiency of the unit and cause insulation to deteriorate.
KDN 24-5: -10°C to +70°C
KDN 24-10: 0°C to +70°C
KDN 24-20: -10°C to +70°C; start up: -10°C,
@ nominal input voltage only.
See Figure 2 for tem-
ORIENTATION: Vertical only (see Figure 1)
WEIGHT:
KDN 24-5: 1.61 lbs (730g)
KDN 24-10: 2.43 lbs (1100g)
KDN 24-20: 4.36 lbs (1980g)
WARRANTY: One year.
STORAGE TEMPERATURE: -40°C to + 85°C.
COOLING: Natural convection.
ALTITUDE: 0 to 10,000 feet.
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
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2 228-1674 REV 2 050813
INSERT
WIRES
KDN 24-5
DC
OUTPUT
KDN 24-10
AC
INPUT
INSERT
WIRES
3043403
NL
KDN 24-5 (115V A-C AND 230V A-C),
KDN 24-10 (115V A-C AND 230V A-C),
KDN 24-20 (230V A-C)
KDN 24-20 (115V A-C)
100
90
)
%
(
g
75
n
i
t
a
R
60
r
e
w
50
o
P
t
u
40
p
t
u
30
O
SEE NOTE.
20
10
--++
INPUT
INSERT
WIRES
AC
PWR OK
OUTPUT
VOLTAGE
ADJUST
PWR
OK
LN
AC
INPUT
INSERT
WIRES
KDN 24-20
OUTPUT
VOLTAGE
ADJUST
PWR
POWER
SHARE
OK
LN
OUTPUT
VOLTAGE
ADJUST
--++
FIGURE 1. COMPONENT LOCATIONS
III — INSTALLATION/REMOVAL
MOUNTING ON DIN RAIL. The KDN Series is
designed to mount on a 35mm DIN rail only as shown in Figure 3 with ventilation holes at top and bottom. Install by inserting one edge of mounting bracket on DIN rail as shown, then
press down to snap onto DIN rail.
REMOVAL. Remove by pulling hook down to release
mounting bracket from DIN rail, then swing power supply away
from DIN rail.
.
++
DC
OUTPUT
--
DC
OUTPUT
-10 0 10 20 30 40 50 60 70
Ambient Temperature (°C)
NOTE: Operation from -10°C to 0°C is as follows:
KDN 24-5: Yes, normal operation
KDN 24-10: No
KDN 24-20: Start up at -10°C, nominal line voltage only.
FIGURE 3. POWER SUPPLY MOUNTING
FIGURE 2. OUTPUT POWER VS. TEMPERATURE
CONNECTIONS. Connect the load to the power supply d-c
output + + and – – terminals shown in Figure 1. The AC input
power is applied via the terminal block. Make sure to connect
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the AC input Neutral, Line and Ground wires to the respective terminals of the terminal block (see Figure 1). Wire strip
length for both a-c and d-c connector is approximately 1/4
inch (6 - 7mm). See Figure 4 for connecting multiple loads.
A
CORRECT METHOD
IV — OPERATION
The Output Voltage Adjust trimmer (see Figure 1) allows
adjustment of the output voltage within the range specified in
Table 1. When output voltage is within specified adjustment
range, the green LED is on. The LED is off as described in
“Power OK Indicator:” on page 2.
PARALLEL OPERATION: Model KDN 24-20 (only) may
be operated in parallel for increased current capability (see
Figure 5). Connecting the PS (Power Share) terminals forces
the current load to be shared equally among paralleled units.
NOTE: ISOLATION DIODES ARE INCLUDED IN KDN 24-20.
LOAD
KDN KDN
POWER
SUPPLY
POWER
SUPPLY
LOAD1LOAD2LOAD
B
LOAD1LOAD2LOAD
FIGURE 4. LOAD CONNECTIONS
KDN
3
3
+
PS
-
FIGURE 5. PARALLEL CONNECTIONS (KDN 24-20 ONLY)
+
PS
-
+
PS
-
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
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4 228-1674 REV 2 050813
FIGURE 6. KDN 24-5 MECHANICAL OUTLINE DIAGRAM
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
050813 228-1674 REV 2 5
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FIGURE 7. KDN 24-10 MECHANICAL OUTLINE DIAGRAM
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: hq@kepcopower.com
6 228-1674 REV 2 050813
FIGURE 8. KDN 24-20 MECHANICAL OUTLINE DIAGRAM
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
050813 228-1674 REV 2 7
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