Digital Temperature Controller

General * The HL8102 series digital temperature controlleris a microprocessor-based controller with digital LCD display. * The controller are used to control room temperature in industrial, commercial and residential environment via controlling electric modulating valve or damper with 0-10Vdc(4-20mA) signal or floating control. * The controller provided proportional plus integral (PI) control with modulating and floating control output. Application * Temperature control for variable air volume (VAV) box * Temperature control for VAV with reheat box * Modulating / Floating valve * Modulating / Floating damper * Constant temperature control Features * Digital display of sensing temperature and user selected temperature setting on demand * Proportional plus integral (PI) advanced control with analog signal output * 0-5Vdc,1-5 Vdc,0-10Vdc or 2-10Vdc signal and floating output * Direct / reverse acting output * Output limited for over load protection * Energy saving mode-external energy savings input (ESI) from card key or occupancy sensors * Adjustable unoccupied setpoint for heating and cooling mode control * Sleep mode control * Model available for build-in or remote sensor (RS) function * Remote control (RC) output for interlocking on/off control application * Non-volatile memory (EEPROM) retains user settings during power loss * Large LCD display with blue backlight * °C or F display unit * Adjustable maximum and minimum setpoint limits * Adjustable deadband (some dual outputs model) * Control off output when system switch at "OFF" position * RS-485 network interface * Modbus RTU protocol Technical data * Power Supply: 24Vac ( 10%), 50/60 Hz * Setpoint Range: 0 to 99.5°C (programmable) * Display Range: 0 to 50.0°C * Display: LCD display * Sensor: NTC * Setting Unit: 0.5°C / step * Indication Accuracy: 0.1°C * Electrical Rating: 0.8 A run, 5 A inrush up to 250Vac * Dimension: 86x86x23mm H x W x D