The LDD family of DC/DC converters is an optimal response to the
applications where compactness and high reliability are requested. All
are isolated and offer a wide range of input voltages.
Simple but elegant look and ease of installation make them ideal for
various industrial applications.
High efficiency and compact size
Wide Input voltage range
Isolated topology
Overload 150%
Excellent reliability
Industrial machine control
Process control
Energy management
Remote control systems
2
LDD240 Series
tech.support@psbel.com
LDD240-11024
110 VDC (90 - 148 VDC)
2.6 A – 3.6 A
24 VDC
10 A
Technical parameters are typical, measured in laboratory environment at 25°C at 110 VDC and nominal values, after minimum
5 minutes of operation.
Input DC Voltage Range
Rated
Operating
110 VDC
90 - 148 VDC
Input DC Current
Vin = Min
Vin = Max
3.6 A
2.6 A
Input Overvoltage Protection
Active shutdown
> 150 VDC
Inrush Peak Current
< 150 A
Internal Protection Fuse
Not user replaceable
Fuse AT 5 A
Recommended External Protection
Use DC rated devices
MCB 6 A C curve
Output Power
240 W
Rated Voltage (Adjustable Voltage Range)
24 VDC (23 – 27.5 VDC)
Continuous Current
10 A
Overload Limit
15 A
Short Circuit Peak Current
21 A
Load Regulation
≤ 1.5%
Ripple & Noise1
≤ 50 mVpp
Hold up Time
≥10 ms
Protections
Overload/short circuit: Hiccup mode
Thermal protection
Output overvoltage
Output Over Voltage Protection
≥ 33 VDC
Status Signals
DC OK - green LED
OVERLOAD - red LED
DC OK - dry contact (NO, 24 VDC / 1 A)
Parallel Connection
Possible for power or redundancy (includes
internal ORing circuit)
Efficiency
> 88 %
Dissipated Power
< 31 W
1 Ripple and Noise are measured with 20 MHz bandwidth, probe terminated with a 0.1 μF MKP parallel capacitor.
NOTE: Power rating, losses, efficiency, ripple, thermal behaviour and start-up may change outside of the nominal rated input range.
Contact factory for details.
LDD240 Series
3
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2016 Bel Power Solutions & Protection
BCD.00763_AA
Operating Temperature
Overtemperature protection
(Start-up type tested: - 40°C)2
- 40 to + 70°C
Storage Temperature
- 40 to + 80°C
Derating
- 3 W/°C over 50°C
Humidity
Non-condensing
5 - 95% RH
Life time expectation
At 25°C ambient
64000 h (7.3 years)
Overvoltage Category
Pollution Degree
I (EN50178)
2 (IEC60664-1)
Protection Class
Class I
Isolation Voltage
Input to Output
Input to Ground
Output to Ground
2.1 kVDC
1.41 kVDC
0.75 kVDC
Safety Standards & Approvals
UL508 (reference)
EN60950 (reference)
EN50178 (reference)
EMC Standards
Emission
EN55022 (CISPR11)
EN55011 (CISPR22)
Class A
Class A
Immunity
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-11
Level 3
Level 3
Level 2
Level 2
Level 2
Protection Degree
EN60529
IP20
Vibration sinusoidal
IEC 60068-2-6
5-17.8 Hz: ±1.6 mm; 17.8-500 Hz:
2 g 2Hours / axis (X,Y,Z)
Shock
IEC 60068-2-27
30 g 6 ms, 20 g 11 ms; 3 bumps / direction,
18 bumps total
2 Possible at nominal voltage with load deration.
Weight
800 g
Dimensions
69 x 115 x 110 mm
Mounting Rail
IEC 60715/H15/TH35-7.5(-15)
Connection Terminals
Screw type pluggable (24 - 12 AWG)
2.5 mm²
Case Material
Aluminum
4
LDD240 Series
tech.support@psbel.com
Figure 1. Mechanical Drawing
1
DC input
2
DC output (Load)
3
Output voltage adjustment
4
Green LED: Output OK
5
Red LED: Overload
6
Diagnostic Output
(dry contacts, NC out OK)
INPUT CONNECTION
OUTPUT CONNECTION
+ = Positive DC
- = Negative DC
= Earth ground
+ = 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.
