SDU500B is an uninterruptible power supply. This DIN rail UPS combines an industry leading compact design with a wide operation temperature range, enhanced communication and unique installation options. The SDU series provides economical protection from damaging impulses and power interruptions. This unit includes easy to wire screw terminations for critical devices needing battery back up such as computer based control systems. Certifications and compliances include UL recognized component, hazardous locations E491259 (ANSI ISA 12.12.01/CSA 213, class I, division 2, groups A, B, C, D, T4), UL recognized component, UPS equipment E1729213 (UL 1778 5th Ed., CSA C22.2 No. 107.3, suitable for UL 508 at full load output (no derating) and Ind. control equipment applications overvoltage cat III, pollution degree III). Applications include programmable logic controllers, factory automation, robotics, conveying equipment, computer based control systems.