LDB120 Series is a single phase 120 W integrated DIN Rail Battery
Charger / DC UPS Power Supplies, suitable for wide variety of
industrial applications.
In case of mains or unit failure the DC UPS function enables the power
supply to feed the load from the battery without any interruption, until
the mains is recovered or the battery reaches the “Deep Discharge
Voltage” threshold.
These units have received excellent market approval for their high
efficiency, excellent reliability and compactness. Simple but elegant
look and easy installation make them market leaders for various
industrial applications.
LDB120 Series are isolation devices suitable for SELV and PELV
circuitry and are designed to be mounted on DIN rail and installed
inside a protective enclosure.
• Input: 120 - 240 VAC
• Output: 12 or 24 VDC model dependent
• To be used with Lead Acid batteries or lithium batteries
(compatible with Lead Acid batteries)
• Efficiency up to 86%
• Economic solution for general purpose applications
• Instantaneous LOAD switch BACKUP mode
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LDB120 Series
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LDB120-12
120 - 240 VAC (140 - 345 VDC)
12 VDC
7 A
LDB120-24
120 - 240 VAC (140 - 345 VDC)
24 VDC
5 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
Rated
Operating
120 - 240 VAC
100 - 264 VAC
Input DC Voltage Range
Rated
140 - 345 VDC
Input Frequency
47 - 63 Hz
Input AC Current
Vin = 120 VAC
Vin = 240 VAC
2.0 A
1.1 A
Input DC Current
Vin = 140 VDC
Vin = 345 VDC
1.0 A
0.5 A
Inrush Peak Current
≤ 40 A
Touch (Leakage) Current
≤ 0.6 mA
Internal Protection Fuse
Not user replaceable
Fuse 3.15 AT
Recommended External Protection
It is strongly recommended to provide external surge
arresters (SPD) according to local regulations
Fuse 4 AT or MCB 4 A C curve
Output Power
120 W
Rated Voltage (Adjustable Voltage Range)
LDB120-12 (to be set at 14 VDC for battery charging)
LDB120-24 (to be set at 27 VDC for battery charging)
12 VDC (12 – 15 VDC)
24 VDC (23 – 28 VDC)
Continuous Current
LDB120-12
LDB120-24
7 A
5 A
Overload Limit
LDB120-12
LDB120-24
11.5 A
6.5 A
Short Circuit Peak Current
LDB120-12
LDB120-24
> 20 A / 40 ms
> 16 A / 80 ms
Load Regulation
≤ 1%
Ripple & Noise1
≤ 100 mVpp
Hold up Time
LDB120-12
Vin = 120 VAC
Vin = 240 VAC
≥ 10 ms
≥ 80 ms
LDB120-24
Vin = 120 VAC
Vin = 240 VAC
≥ 10 ms
≥ 55 ms
Protections
• Overload/short circuit: Hiccup mode
• Thermal protection
• Output overvoltage
Output Overvoltage Protection (Active)
LDB120-12
LDB120-24
≥ 18 VDC
≥ 33 VDC
Battery Protections
Against short-circuit with resettable fuse (9 A)
Against reverse polarity connection
Against deep discharge
Deep Discharge Cut-Off Voltage
LDB120-12
LDB120-24
9 VDC ± 0.5 V
18 VDC ± 0.5 V
Status Signals
• LOAD ON PSU - green LED
• LOAD ON BATTERY - amber LED
• Dry contact (SPDT, 24 VDC / 1 A)
LDB120 Series
3
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2018 Bel Power Solutions & Protection
BCD.00856_AB
Parallel Connection
Not Recommended
Efficiency
LDB120-12
LDB120-24
> 83.5%
> 86%
Dissipated Power
LDB120-12
LDB120-24
< 21 W
< 20 W
Battery Information
Rated Voltage
LDB120-12
• LDB120-24
12 - 14.4 VDC
24 - 28.8 VDC
Max Charging Current
0.8 A
1 Ripple and Noise are measured with 20MHz bandwidth, probe terminated with a 0.1μF 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.
Operating Temperature
Overtemperature protection
(Start-up type tested: - 40°C2)
- 40 to + 70°C
Storage Temperature
- 40 to + 80°C
Derating
LDB120-12
LDB120-24
- 0.75 W/°C over 50°C
- 1.2 W/°C over 50°C
Humidity
Non-condensing
5 - 95% RH
Overvoltage Category
Pollution Degree
III (EN50178)
2 (IEC60664-1)
Protection Class
Class I
Isolation Voltage
Input to Output
Input to Ground
Output to Ground
4.2 kVDC
2.2 kVDC
0.75 kVDC
Safety Standards & Approvals
UL508 (reference)
EN60950 (reference)
EN50178 (reference)
EMC Standards
Emission
EN55022 (CISPR22)
EN55011 (CISPR11)
Class A
Class A
Immunity
EN61000-4-2
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-11
Level 3
Level 2
Level 2
Level 3
Level 2
Protection Degree
EN60529
IP20
Vibration Sinusoidal
IEC 60068-2-6
5-17.8 Hz: ±1.6 mm; 17.8-500 Hz: 2g 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
500 g
Dimensions
54 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
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LDB120 Series
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Figure 1. Mechanical Drawing
INPUT CONNECTION
OUTPUT CONNECTION
• Single phase:
• L = Line
• N = Neutral
• = Earth ground
▪ LOAD (+/-) = connect to DC (+/-) Load
▪ BATTERY (+/-) = connect to Battery (+/-)
▪ PS ON PSU = dry contact NC
▪ LOAD ON BATTERY = dry contact NO
• DC:
• L = + Positive DC
• N = - Negative DC
• = Earth ground
• Signaling:
• SPDT dry contact
▪ NO
▪ NC
▪ 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.