Description
The Chinfa DRAN120-24A is a 120W DIN rail power supply designed for 24VDC backup and battery-supported industrial systems. This A-version uses fixed screw terminals and provides a regulated 27.2VDC output at up to 4.4A, making it suitable for maintaining and powering nominal 24V battery systems.
The unit accepts a 115/230VAC input with automatic selection and includes power factor correction, SELV component design and dedicated status indication for DC output and low-voltage conditions.
Its robust metal enclosure mounts directly onto a standard 35mm DIN rail and is designed for natural-convection cooling in industrial control cabinets.
Chinfa DRAN120-24A 24V Backup DIN Rail Power Supply
A 120W industrial DIN rail supply for nominal 24VDC backup systems, with a 27.2VDC charging output and fixed screw terminals.
The DRAN120-24A is intended for DC backup applications where a nominal 24V battery system requires a controlled charging and supply voltage. It delivers 27.2VDC at up to 4.4A, providing 120W of output power for battery-supported control and automation equipment.
Typical Applications
The Chinfa DRAN120-24A is suitable for applications including:
- Nominal 24VDC battery-backup systems
- Industrial automation and machinery
- PLC, HMI and remote I/O systems
- Emergency control and monitoring equipment
- Security and access-control systems
- Industrial communications equipment
- Battery-supported control panels
24V Backup-System Output
The DRAN120-24A provides a nominal charging output of 27.2VDC for 24V battery systems. This higher regulated voltage is required for maintaining and charging connected batteries while supporting the DC load.
120W Output Capacity
The power supply delivers up to 4.4A at 27.2VDC, providing approximately 120W of continuous output power.
Automatic 115/230VAC Input Selection
The unit is designed for 115VAC and 230VAC mains systems with automatic input-voltage selection, simplifying installation across common industrial supply networks.
Status Indication and Relay Contact
Front-panel indicators provide clear visual status for DC output and low-voltage conditions. A normally open ready relay contact is provided for remote DC output monitoring on the 24V model.
Fixed Screw-Terminal Version
The A suffix identifies the fixed screw-terminal version, providing secure field wiring for permanent installation inside industrial control cabinets.
DIN Rail Installation
The metal enclosure clips directly onto TS35/7.5 or TS35/15 DIN rail and uses natural convection cooling. Clearance around the unit should be maintained to support airflow.
Key Features
The principal electrical, monitoring and installation characteristics of the Chinfa DRAN120-24A.
- Model: DRAN120-24A
- Application: Nominal 24VDC backup and battery-supported systems
- Terminal type: Screw terminals
- Input voltage: 115/230VAC, automatic selection
- Output voltage: 27.2VDC
- Maximum output current: 4.4A
- Rated output power: 120W
- Typical efficiency: 86%
- Power factor correction: PFC function
- Status indication: DC ON and DC LOW LEDs
- Remote monitoring: Normally open ready relay contact
- Cooling: Natural convection
- Enclosure: Metal
- Dimensions: 124.5 x 64 x 123.6mm
- Weight: Approximately 920g
- Warranty: 3 years
Technical Specification
Electrical, monitoring, environmental and mechanical information for product selection and system design.
| Specification | Details |
|---|---|
| Manufacturer | Chinfa Electronics |
| Model Number | DRAN120-24A |
| Series | DRAN120* |
| Product Type | DIN rail power supply for DC backup systems |
| Number of Outputs | 1 |
| Input Phase | Single phase |
| AC Input Voltage | 115/230VAC, automatic selection |
| Nominal System Voltage | 24VDC backup system |
| Regulated Output Voltage | 27.2VDC |
| Rated Output Current | 4.4A |
| Rated Output Power | 120W |
| Typical Efficiency | 86% |
| Power Factor Correction | PFC function available |
| DC ON Indicator | Front-panel LED |
| DC LOW Indicator | Front-panel LED |
| Ready Relay Contact | Normally open contact for DC output-level monitoring |
| Operating Temperature | -25 to +71°C, subject to output derating above +61°C |
| Cooling Method | Natural convection |
| Recommended Clearance | 25mm free space on all sides |
| Connections | Fixed screw terminals |
| Cable Size | 10 to 24AWG flexible or solid cable |
| Enclosure Material | Metal |
| Dimensions | 124.5 x 64 x 123.6mm |
| Weight | Approximately 920g |
| Warranty | 3 years |
Available Model
This product page covers only the 24V backup-system version with fixed screw terminals.
| Model Number | Input Voltage | Output Voltage | Output Current | Power Rating |
|---|---|---|---|---|
| DRAN120-24A | 115/230VAC auto select | 27.2VDC | 4.4A | 120W |
Technical Support from Relec Electronics
As part of the Relec Electronics group, Dinrail Power benefits from over 45 years of experience supplying industrial electronic components and power solutions. Our engineering team can provide technical guidance, product selection support and assistance with DIN rail power supplies, battery-backup systems and complex industrial power requirements. For alternative solutions, customised options or specialist technical advice, visit the Relec Electronics website.




