Reliance Automation DBU-400 Industrial UPS Module
The Reliance DBU-400 is a high-performance Uninterruptible Power Supply (UPS) module engineered for critical industrial automation systems. It delivers seamless power backup to protect sensitive equipment from voltage fluctuations, surges, and outages, ensuring continuous operation in manufacturing, data centers, and process control environments.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Reliance Automation |
| Input Voltage | 90-264V AC |
| Output Voltage | 220V AC |
| Output Frequency | 50/60Hz ± 0.2% |
| Battery Type | Sealed Lead Acid |
| Capacity | 400VA |
| Transfer Time | < 4ms |
| Efficiency | Up to 95% |
| Communication | RS-232/RS-485 |
| Dimensions | Compact industrial form factor |


Applications & Compatibility
Ideal for safeguarding PLCs, HMIs, SCADA systems, and industrial servers in:
- Manufacturing assembly lines
- Data center infrastructure
- Process control facilities
- Telecommunications systems
Compatible with Reliance Automation control racks and third-party systems through standard DIN-rail mounting. Commonly paired with Reliance RMC-200 controllers and ProView HMI series.
Why Choose Apex Automation?
Founded in 2014, Apex Automation delivers ready-to-ship industrial solutions with expert technical support. Our services include:
- Pre-sales engineering consultations
- 1-year comprehensive warranty
- Priority troubleshooting support
- Custom configuration assistance
Contact us for pricing and availability: WhatsApp Support or Email Us. Can’t find your model? We source specialized industrial components within 72 hours.

















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