Description
NSR750U Series – DC UPS / Battery Charger – 750W, 12Vdc / 24Vdc / 48Vdc
The NSR750U Series is a rugged industrial-grade DC UPS and battery charger platform delivering up to 750W of continuous no-break DC power. Designed for mission-critical applications, the NSR750U provides uninterrupted transition between mains power and battery backup to maintain operation of critical loads during AC supply interruptions.
Available in 12Vdc, 24Vdc and 48Vdc variants, the NSR750U incorporates intelligent battery charging, programmable Low Voltage Disconnect (LVD), battery condition testing and electronic battery circuit protection. Separate battery and load terminals minimise voltage drop and ensure reliable charging and discharge performance under dynamic load conditions.
All models include standard RS-485 MODBUS RTU communications for integration into SCADA and remote monitoring systems. Ethernet/SNMP-optioned models add secure web-based monitoring and configuration, providing full remote visibility of charger, battery and alarm status.
Built for harsh industrial and utility environments, the NSR750U features wide-range AC input, fan-cooled thermal management, programmable charging parameters and support for both M8 stud or Phoenix terminal output configurations.
Features and Benefits
- 750W no-break DC UPS ensures uninterrupted power transfer between mains and battery.
- Integrated battery charging with programmable temperature compensation and LVD.
- Standard RS-485 MODBUS RTU for SCADA integration and remote monitoring.
- Optional Ethernet/SNMP interface with intuitive web-based management.
- Electronic battery circuit breaker (ECB) provides advanced battery protection.
- Available with M8 stud or Phoenix terminal outputs for installation flexibility.
Key Applications
- Utility and substation DC power systems
- SCADA and industrial automation infrastructure
- Telecommunications and radio communications
- Security, surveillance and access control systems
- Remote infrastructure requiring reliable 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 fault conditions.
- Input fuse and varistor surge protection.
- Triple-fan cooling system 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: M8 stud terminals (S) or Phoenix terminals (T).
- Communications options: Standard RS-485 MODBUS RTU or optional Ethernet/SNMP (C).
- Operation modes: UPS/charger (U) or charger-only (F).
