Description
NSR500U Series – DC UPS / Battery Charger – 500W, 12Vdc / 24Vdc / 48Vdc
The NSR500U Series is a compact and rugged DC UPS / battery charger platform engineered to provide uninterrupted DC power for critical industrial and communications infrastructure. Delivering up to 500W of continuous output power, the NSR500U ensures seamless no-break transfer between mains power and battery backup during AC supply interruptions.
Available in 12Vdc, 24Vdc and 48Vdc variants, the NSR500U combines intelligent battery charging, programmable Low Voltage Disconnect (LVD), electronic battery circuit protection and battery condition testing into a single integrated platform. Separate battery and load connections improve charging efficiency and minimise voltage drop under dynamic load conditions.
All models include standard RS-485 MODBUS RTU communications for integration into SCADA and industrial monitoring systems. Ethernet/SNMP-optioned models add web-based monitoring and remote configuration capabilities, providing real-time visibility of charger, battery and alarm status.
The NSR500U is designed for harsh operating environments with wide AC input tolerance, rugged mechanical construction, programmable charging control and triple-fan cooling for improved thermal reliability. Output connection options include either M8 stud terminals or Phoenix terminal connectors.
Features and Benefits
- 500W no-break DC UPS with seamless transfer between mains and battery operation.
- Integrated battery charging with programmable temperature compensation and LVD.
- Standard RS-485 MODBUS RTU communications for SCADA integration.
- Optional Ethernet/SNMP interface with intuitive web-based monitoring and configuration.
- Electronic circuit breaker (ECB) provides advanced battery circuit protection.
- Available with either M8 stud or Phoenix terminal output configurations.
Key Applications
- Utility and substation DC backup systems
- SCADA and industrial automation infrastructure
- Telecommunications and radio communications systems
- Security, surveillance and access control applications
- Remote industrial sites requiring resilient DC backup power
Safety Features
- Electronic battery circuit breaker (ECB) with overload and short-circuit protection.
- Programmable Low Voltage Disconnect protects batteries from deep discharge.
- Constant-current overload protection under overload and short-circuit conditions.
- Input fuse and varistor surge protection.
- Triple-fan cooling system improves thermal performance and reliability.
Safety & Compliance
- AS/NZS 60335.2.29 safety compliance.
- CISPR 32:2015 / Amdt 1:2020 Class A EMC compliance.
- IP20 protection rating.
- Isolation ratings: I/P-O/P 2121Vdc, I/P-FG 2121Vdc, O/P-FG 707Vdc.
Available Configurations
- Voltage options: 12Vdc, 24Vdc or 48Vdc nominal output.
- Output terminal options: M8 stud terminals (S) or Phoenix terminals (T).
- Communications options: Standard RS-485 MODBUS RTU or optional Ethernet/SNMP (C).
