Mean Well DUPS20 20A 24V DC Uninterruptible Power Supply (UPS) Module for DIN Rail, Battery Charger 2A DC UPS System for Industrial Automation, Security

FeaturesDUPS20: Rated 20A, Width 40mm (1.57 inches).DUPS40: Rated 40A, Width 63mm (2.48 inches). Physical Dimensions: 125.2mm (H) x 113.5mm (D) for both models The MEAN WELL DUPS20 (20A) and DUPS40 (40A) are next-generation, DIN-rail mountable Uninterruptible DC-UPS modules. Unlike traditional AC UPS systems which require DC-to-AC inversion, the DUPS series directly buffers the 24V DC bus. This results in higher efficiency, smaller footprint, and seamless switching. To form a complete DC-UPS system, you must use three components: 1) A power supply (e.g., Mean Well SDR or HDR series), 2) The DUPS20/40 module, and 3) An external 24V lead-acid battery. Under normal conditions, the DUPS module monitors the DC voltage and trickle-charges the external battery (2A charge current). When the AC power fails, the internal logic immediately disconnects the power supply input and connects the load to the battery, ensuring zero interruption to your critical equipment like PLCs, HMI, CCTV, and alarm systems. Once power is restored, it automatically switches back and resumes charging.

• RELIABLE DC BACKUP & BATTERY MANAGEMENT: This Mean Well DIN Rail DC UPS module ensures uninterrupted operation of your 24V systems (24-29VDC input range). It seamlessly switches to an external battery during AC mains failure, preventing costly downtime, data loss, or equipment shutdown in factory automation, security surveillance, or semiconductor fabrication lines.
• EASY INTEGRATION WITH DIN RAIL MOUNTING: Designed for TS35/TS15 standard DIN rails, the MEAN WELL DUPS series installs effortlessly into your existing industrial control cabinets. It features a simple parallel connection to the DC BUS, allowing for quick integration with any Mean Well or third-party power supply to build a cost-effective DC-UPS solution.
• INTELLIGENT 2A CHARGING & REMOTE MONITORING: The built-in charger provides a constant 2A current (for both DUPS20/40) to maintain external batteries at full capacity. Equipped with remote control and monitoring functions (Remote ON/OFF & Battery OK signal), you can easily monitor DC BUS voltage and battery status from a distance for real-time diagnostics.
• COMPREHENSIVE PROTECTIONS FOR SAFETY: Safeguard your equipment with built-in Short Circuit protection, Battery Reverse Polarity protection (prevents damage during installation errors), and Battery Over-discharge Low Voltage Disconnect (prevents battery deep discharge, extending battery life). Certified with CE, UKCA, and EAC safety approvals.
• WIDE TEMPERATURE RANGE FOR HARSH ENVIRONMENTS: Rated for a wide operating temperature range of -30°C to +70°C, the DUPS series performs reliably in extreme conditions. The DUPS20 measures just 40mm in width, while the DUPS40 is 63mm wide, making them perfect for space-constrained industrial cabinets.