LDN481 Series is a single phase DIN Rail Switching Power Supply
suitable for broad range of industrial, telecom and renewable energy
applications.
The unit has received excellent market approval for its high efficiency,
excellent reliability and compactness. Simple but elegant look and
easy installation makes it ideal for various industrial applications.
LDN481 Series is Class I isolation device suitable for SELV and PELV
circuitry (up to 48 VDC models) and is designed to be mounted on DIN
rail and installed inside a protective enclosure.
High efficiency
Compact size
Overload 150%
Constant current or Hiccup mode limitation, user settable
Easy parallelable for power increase
Natural convection cooling
RoHS Compliant
Industrial automation
Heavy duty applications
Process control
Building automation and general purpose
2
LDN481 Series
LDN481-24
LDN481-48
LDN481-72
90-132 / 187-264 VAC (270 - 345 VDC)
90-132 / 187-264 VAC (270 - 345 VDC)
90-132 / 187-264 VAC (270 - 345 VDC)
1
1
1
24 VDC
48 VDC
72 VDC
20 A
10 A
6.7 A
Technical parameters are typical, measured in laboratory environment at 25°C and 240 VAC / 50 Hz, at nominal values, after minimum 5
minutes of operation.
Input AC Voltage Range
Input DC Voltage Range
Input Frequency
Input AC Current
Input DC Current
Inrush Peak Current
Touch (Leakage) Current
Internal Protection Fuse
Recommended External Protection
Rated ( UL certified) Settable with Voltage Selector Bridge
Operating
Rated (without Voltage Selector Bridge)
120 / 240 VAC
90 – 132 / 187 – 264 VAC
270 – 345 VDC
47 – 63 Hz
Vin = 120 VAC
Vin = 240 VAC
Vin = 270 VDC
Vin = 345 VDC
7.2 A
4.3 A
2.2 A
1.9 A
≤
35 A
≤
1 mA
None, external fuse must be provided
It is strongly recommended to provide external surge
arresters (SPD) according to local regulations
Fuse AT 16A or MCB 16A C
Output Power
Rated Voltage
(Adjustable Voltage Range)
Continuous Current
LDN481-24
LDN481-48
LDN481-72
LDN481-24
LDN481-48
LDN481-72
LDN481-24
LDN481-48
LDN481-72
LDN481-24
LDN481-48
LDN481-72
LDN481-24
LDN481-48 / LDN481-72
LDN481-24 / LDN481-48
LDN481-72
Overload, short circuit: Constant current or Hiccup mode
(user settable)
Thermal protection
Output overvoltage
LDN481-24
LDN481-48
LDN481-72
Overload Limit (Constant Current Mode)
Overload Limit (Hiccup Mode) Max. 5 s
Load Regulation
Ripple & Noise
1
Hold up Time
Protections
480 W
24 VDC (23 – 28 VDC)
48 VDC (45 – 55 VDC)
72 VDC (72 – 85 VDC)
20 A
10 A
6.7 A
22 A
11 A
7.5 A
30 A
15 A
10 A
≤
1.0%
≤
0.5%
≤
100 mVpp
≤
200 mVpp
≥
35 ms
Output Over Voltage Protection
≥
33 VDC
≥
68 VDC
≥
100 VDC
tech.support@psbel.com
LDN481 Series
Status Signals
Parallel Connection
2
Efficiency
DC OK - green LED
DC OK - dry contact (NO, 24 VDC / 1 A)
Possible for power or redundancy (with external ORing
module)
LDN481-24
LDN481-48
LDN481-72
LDN481-24
LDN481-48
LDN481-72
3
Dissipated Power
1
2
> 91%
> 91.5%
> 92%
< 48 W
< 45 W
< 42 W
Ripple and Noise are measured with 20MHz bandwidth, probe terminated with a 0.1μF MKP parallel capacitor.
Pay attention, set the current limitation mode jumper on C.C. mode when connecting more units in parallel.
NOTE:
Power rating, losses, efficiency, ripple, thermal behaviour and start-up may change outside of the nominal rated input range.
Contact factory for details.
Operating Temperature
Storage Temperature
Derating
Humidity
Life time Expectancy
Overvoltage Category
Pollution Degree
Protection Class
Isolation Voltage
UL certified up to 45°C
(Start-up type tested: - 40°C)
3
- 40 to + 70°C
- 40 to + 80°C
- 7.2 W/°C over 45°C
Non-condensing
At 25°C ambient 75% load
5 - 95% RH
64000 h (7.3 years)
III (EN50178)
2 (IEC60664-1)
Class I
4.2 kVDC
2.2 kVDC
0.75 kVDC
Safety Standards & Approvals
EMC Emission
EMC Immunity
Protection Degree
Vibration Sinusoidal
Shock
3
Input to Output
Input to Ground
Output to Ground
UL508 (certified E356563 )
EN60950 (reference)
EN50178 (reference)
EN55011 (CISPR11)
EN55022 (CISPR22)
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-11
EN60529
IEC 60068-2-6
IEC 60068-2-27
Class A
Class A
Level 3
Level 3
Level 3
Level 3
Level 2
IP20
5 - 17.8 Hz: ±1.6 mm; 17.8 - 500 Hz:
2 g 2 Hours / axis (X, Y, Z)
30 g 6 ms, 20 g 11 ms; 3 bumps / direction,
18 bumps total
Possible at nominal voltage with load derating.
Weight
Dimensions (W x D x H)
Mounting Rail
Connection Terminals
Case Material
Screw type header (24 - 12 AWG)
Aluminum
1300 g
80 x 127 x 137.5 mm
IEC 60715/H15/TH35-7.5(-15)
1.5 - 6 mm²
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00851_AB
© 2016 Bel Power Solutions & Protection
4
LDN481 Series
Figure 1. Mechanical Drawing
1
2
3
4
5
6
7
8
AC/DC input
Wire bridge for 120 VAC
DC output (load)
Diagnostic Output
(dry contact, NC output OK)
Green LED: Output OK
Red LED: Overload
Output voltage adjustment
Selectable limitation mode
(Hiccup mode, C.C. mode)
INPUT CONNECTION
Single phase:
L = Line
N = Neutral
= Earth ground
120 VAC Bridge used only
when used at 120 VAC
DC:
L = + Positive DC
N = - Negative DC
= Earth ground
OUTPUT CONNECTION
+ = Positive DC
- = Negative DC
Signaling:
DC OK: dry contact
NO
COM
NUCLEAR AND MEDICAL APPLICATIONS
- Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS
- The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
tech.support@psbel.com
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