AC DC Power Supply 24VDC
Application Scenarios
FAQ Q1: Can Tonhe 24V AC-DC modules charge batteries? A: Yes. The output voltage is adjustable to support float charge and equalize charge modes for 24V lead-acid batteries. Pair it with Tonhe matching monitoring units for automatic battery management logic. We do NOT recommend connecting the module directly to batteries without a management unit. Q2: Can multiple modules be paralleled for N+1 redundant power supply? How is the current sharing performance? A: Parallel operation is supported. The module is equipped with digital current-sharing control with excellent current balance, widely verified in redundant DC power panel solutions. Use same-model and same-batch modules and set addresses following the manual when paralleling. Q3: The local grid is unstable and often drops below 190VAC. Can the module work normally? A: Standard version works steadily within 187~286VAC. Contact us for customized ultra-wide input versions if you face larger voltage fluctuations. Q4: The natural convection version has no fan. Will it trigger overtemperature protection in a sealed cabinet during summer? A: Fanless models are designed according to thermal conditions of sealed power cabinets. Still, derating curves and cabinet ventilation rules must be followed. The module will derate power and trigger overtemperature alarm instead of burning out once exceeding the rated ambient temperature. Air-cooled versions are recommended for high-power applications or poorly ventilated cabinets. Q5: Can this module be exported? Are English datasheets and test reports available? A: Yes, it supports export projects. We can provide English datasheets and test reports. Parameters and communication protocols can be adjusted to meet overseas automation and distribution project requirements. Why Choose Tonhe Technology 24V AC-DC Power Supply?
24VDC is the most widely adopted DC bus voltage in industrial automation, power distribution, telecommunications and security industries. A stable AC-DC 24V rectifier module directly determines whether automatic control equipment and terminal devices can operate fault-free for a long time. This article focuses on the Tonhe TH series 24V AC-DC rectifier module. We will cover application scenarios, core features, comparison with competitors, FAQs, and explain why many system integrators, power project contractors and overseas buyers prefer Tonhe’s 24V power modules.
Tonhe 24V AC-DC rectifier modules are engineered for harsh industrial and grid-grade environments, far beyond ordinary commercial power supplies:
- ✅ Power Distribution Automation: FTU, DTU, ring main units, switchgears, fault indicators and distribution terminals, compatible with State Grid / Southern Grid integrated power cabinets
- ✅ Industrial Automation: PLCs, sensors, solenoid valves, servo drives, industrial HMI panels and robot control units
- ✅ Telecom & Security: Small telecom base stations, access control systems, cameras, industrial switches, emergency lighting and backup battery float charging
- ✅ Railway & On-board Auxiliary Power: Low-voltage control units, cooling fans and BMS auxiliary power supply (matching Tonhe on-board 24V DC-DC series)
- ✅ New Energy Energy Storage: BMS, temperature control units, fire controllers and UPS auxiliary DC power inside energy storage cabinets
- ✅ Control Cabinets / Integrated DC Panels: Parallel connection for capacity expansion to build a 24V DC operating power system with battery charge & discharge management
Tonhe 24V rectifier modules adopt self-developed LLC resonant soft-switching topology and resonant voltage double-loop control with fully digital architecture, belonging to the mature TH power/telecom module family (typical models: TH24T50ZZ, TH24V20ZZ-220, etc.)
- Wide AC Input Range: 187~286VAC single-phase wide input. It resists grid voltage fluctuation and long-distance power supply instability. Suitable for domestic mains and unstable overseas power grids.
- Adjustable Stable 24VDC Output: Output adjustable from 21V to 29VDC with high voltage regulation accuracy and low ripple. It can power 24V loads directly and support float charging for lead-acid or lithium batteries.
- High Efficiency & Energy Saving: Soft-switching topology delivers high full-load efficiency, less heat generation and lower long-term operating energy cost.
- Natural Convection Cooling (Standard): Fanless design eliminates fan wear, dust accumulation and noise. Longer service life and maintenance-free, ideal for sealed power cabinets. High-power versions support optional intelligent air cooling.
- Comprehensive Protection: Input under/over voltage, output overvoltage, overcurrent, short circuit and overtemperature protection. Fault latch & alarm function. Parallel current-sharing protection ensures one failed module will not crash the whole system.
- Intelligent Monitoring & Communication: Built-in RS485 port with standard Modbus protocol. Supports four remote functions: remote measurement, remote signal, remote control and remote adjustment. Monitor voltage, current, temperature and fault codes remotely for easy O&M, compatible with power monitoring platforms.
- Strong Environmental Adaptability: Wide operating temperature range, high-altitude compatibility, high-level EMC immunity, lightning and surge resistance, fully compliant with power industry standards. Domestic design with stable supply chain.
- Parallel Operation & N+1 Redundancy: Expand capacity on demand. N+1 redundant configuration. A faulty module will automatically exit without power interruption, meeting high-reliability redundant requirements.
Three major types of 24V AC-DC modules are available on the market: consumer-grade power supplies, ordinary domestic industrial power supplies and imported branded modules. The differences are listed below:
| Comparison Item | Tonhe 24V Rectifier Module | Low-cost Domestic 24V Power Supply | Imported Brand Modules |
|---|---|---|---|
| Standard & Certification | Power / telecom grade, meets State Grid and Taier specifications, designed for long-cycle industrial use | Consumer-grade, light-load industrial use, no grid certifications | Premium industrial grade with complete certifications, high price & long lead time |
| Cooling | Standard fanless natural cooling; air-cooled or potting reinforced versions optional | Mostly fan-cooled, fans easily clogged and damaged; simple potting for a small number of models | Mostly air-cooled, spare parts hard to source locally |
| Monitoring | Native RS485, remote adjustment & alarm, ready for DC panel monitoring backends | Only indicator lights, no digital communication, no remote data collection | Closed communication protocols, high secondary development cost for integration |
| Parallel Redundancy | Native digital current sharing, proven N+1 redundancy widely deployed in grid DC panel projects | Some models cannot be paralleled; uneven current sharing may burn modules | Supports parallel operation at very high cost |
| Supply Chain & Delivery | Listed domestic manufacturer with self-R&D & self-production, stable stock, customizable parameters for overseas projects | Small-scale OEM designs, prone to out-of-stock due to chip shortage, inconsistent quality | Overseas ordering, lead time 4–12 weeks, slow after-sales response |
| Anti-interference & Reliability | LLC soft-switching, EMC, surge and lightning indexes optimized for power field sites, suitable for outdoor RMUs | Weak EMC, easily damaged under voltage surge or lightning strike | Excellent reliability with heavy premium pricing |
| After-sales & Technical Support | Local engineering team for solution design, commissioning and troubleshooting. English documentation available for export orders | Weak after-sales, almost no professional technical support | Limited local technical support in China |
- Profound Industry Experience: Tonghe Technology has over 20 years of experience in power and telecom power supplies as a listed company. Massive installations in State Grid, Southern Grid and telecom tower sites prove field reliability. It is not a new unknown brand.
- Self-developed Core Topology: The LLC resonant soft-switching technology is independently developed instead of modified public reference designs. We fully control underlying control and protection logic and can deliver fast customization.
- System-oriented Solution Provider, not merely power supply seller: Most customers need not only a 24VDC rectifier block but also a complete DC power system solution. Tonhe can supply matching monitoring units, distribution and battery management all-in-one.
- Balanced Reliability, Price & Lead Time: Avoid the high price and long lead time of imported brands while outperforming low-cost power supplies in reliability. Ideal for bidding, long-term maintenance and bulk export orders.
- Comprehensive Technical Service: Pre-sales model selection, drawing support, on-site commissioning guidance and fast fault diagnosis. English technical support is available for overseas clients.
