Description
NSR250U Series – DC UPS / Battery Charger – 250W, 12Vdc / 24Vdc / 48Vdc
The NSR250U Series is a compact industrial-grade DC UPS / battery charger designed to provide uninterrupted DC power for critical communications and industrial systems. Delivering up to 250W continuous output power, the NSR250U ensures seamless no-break transfer between mains supply and battery backup operation.
Available in 12Vdc, 24Vdc and 48Vdc variants, the NSR250U integrates intelligent battery charging, programmable Low Voltage Disconnect (LVD), battery condition testing and electronic battery circuit protection into a compact enclosure suitable for demanding environments.
All models include standard RS-485 MODBUS RTU communications for integration into SCADA and industrial monitoring systems. Ethernet/SNMP-optioned models add an intuitive web-based monitoring and configuration interface, enabling remote visibility of charger, battery and alarm status.
The NSR250U features wide-range AC input, programmable temperature-compensated charging and fan-assisted cooling for dependable operation in industrial, telecom and utility applications. The compact form factor and Phoenix terminal outputs simplify installation where space is limited.
Features and Benefits
- 250W no-break DC UPS with seamless switching 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 protection.
- Compact fan-assisted design with Phoenix terminal outputs for simplified installation.
Key Applications
- SCADA and industrial automation systems
- Utility and substation DC backup infrastructure
- Telecommunications and radio communications equipment
- Security, surveillance and access control systems
- Remote and space-constrained industrial installations
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 protection and integrated alarm relays.
- Fan-assisted cooling improves thermal 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: Phoenix terminals standard.
- Communications options: Standard RS-485 MODBUS RTU or optional Ethernet/SNMP (C).
