Buffer Modules

24V / DRB-24V040ABN

Highlights & Features

  • Full corrosion resistant aluminium chassis
  • Minimum buffering time of 200ms @ 24V/40A
  • Flexible operating buffering voltage modes:

            o Fixed mode at 22Vdc

            o Dynamic mode for Vin -1V

  • Supports parallel connection to extend buffering time
  • Conformal coating on PCBA to protect against chemical and dust pollutants
Dimensions (L x W x D) : 
121 x 70 x 120.1 mm
4.76" x 2.76" x 4.73"
Unit Weight : 
0.90 kg (1.98 lb)
Nominal Output Voltage
Output Current
Output Voltage Adjustment Range
Vbuff is fixed to 22V. Buffering starts if terminal voltage falls below 22Vdc.
Buffering Time
< 200ms Min @ 24V/40A Load, < 8s Min @ 24V/1A Load
< 350mVpp, buffering mode
Parallel Connection
Nominal Input Voltage
Input Current
Charging Mode: < 0.6A
Input Power (Standby Mode)
Charging Time
< 40s
121 x 70 x 120.1 mm
4.76" x 2.76" x 4.73"
Unit Weight
0.90 kg (1.98 lb)
Case Chassis / Cover
Cooling System
Operating Temperature
-25°C to +75°C
Storage Temperature
-25°C to +85°C
Power De-rating
> 70°C de-rate power by 5% / °C
Operating Humidity
5 to 95% RH (Non-Condensing)
Shock Test (Non-Operating)
IEC 60068-2-27, 30G (300m/S²) for a duration of 18ms, 1 time per direction, 2 times in total
Vibration Test (Non-Operating)
IEC 60068-2-6, 10Hz to 500Hz @ 30m/S² (3G peak); 60 min per axis for all X, Y, Z direction
Yes, 35Vdc Max (the maximum input voltage that will not cause damage to the unit)
Overload / Overcurrent
> 120% of rated load current, Latch-off Mode
Short Circuit
Yes, No damage to the unit, Latch-off Mode
Degree of Protection
Protection Against Shock
Class I with PE connection
> 800,000 hrs. as per Telcordia SR-332
I/P: 24Vdc, Standby Mode, Ta: 25°C
Electrical Safety
SIQ: EN 60950-1
UL/cUL recognized: UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E191395)
CB scheme: IEC 60950-1
In conformance with EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU
Galvanic Isolation
Input & Output / PE: 1.5KVac
Signal / PE: 1.5KVac
Industrial Control Equipment
UL/cUL listed: UL 508 and CSA C22.2 No. 107.1-01 (File No. E315355)
CSA: CSA C22.2 No. 107.1-01 (File No. 181564)
Electrical Equipment for Use in Electrical Power Installations
EN 50178 / IEC 62103
Material and Parts
RoHS Directive 2011/65/EU Compliant
(CE & RE)
CISPR 32, EN 55032, EN 55011, FCC Title 47: Class B, EN 61204-3
EN 55024, EN 61000-6-2


Datasheet Uploaded on 24-Dec-2018 1.4 MB
.DXF Uploaded on 13-Jul-2015 236 KB
Manual Uploaded on 18-Nov-2016 1.4 MB
Mechanical Drawing Uploaded on 13-Jul-2015 54 KB
.STP Uploaded on 13-Jul-2015 2.2 MB
Image Uploaded on 03-Nov-2016 167 KB


CB Uploaded on 21-Jul-2015 917 KB
CE Uploaded on 27-Mar-2017 47 KB
CSA Uploaded on 21-Jul-2015 115 KB
EAC Uploaded on 27-Mar-2019 1.1 MB
REACH Uploaded on 18-Dec-2018 545 KB
RoHS Uploaded on 18-Dec-2018 380 KB
SIQ Uploaded on 21-Jul-2015 569 KB
UL Uploaded on 13-Jul-2015 68 KB
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