SPR1 Series Slim Single-Phase Power Controllers with LED Display The SPR1 series single-phase power controllers are ideal for installation in limited spaces with slim body sizes measuring only 55 mm wide. The LED display allows real-time monitoring of control input, load voltage, load current, load power, load resistance, and heat-sink temperature. The controllers feature phase control, cycle control, and ON/OFF control methods, with feedback control (constant current, constant voltage, constant power) option available for accurate and stable power control. Main features Slim and elegant design LED display allows real-time monitoring of control input, load voltage, load current, load power, load resistance, and heat-sink temperature Stable control with feedback control (constant current, constant voltage, constant power) Communication output models available: RS485 (Modbus RTU) Parameter configuration via PCs (RS485): Free device management software (DAQMaster) Various alarm functions (alarm output) : overcurrent, overvoltage, heater disconnection, fuse break, heat-sink overheat, diode (SCR) error Easy installation with mounting brackets Easy fuse replacement and maintenance High performance SCR (IXYS) diode Slim Size Bright LED Display Feedback Control Output Accuracy RS485 Communication (Modbus RTU) Dedicated Software Slim Size Measuring Only 55 mm Wide The SPR1 series power controllers are approximately 50% slimmer than similar models from other brands, making it easier to install in limited spaces. 25A/35A/50A/70A models only