The Series SCD DIN Rail Temperature/Process Controllers offer multiple PID loops in a compact size. Each SCD-1000 master controller can be combined with up to seven SCD-2000 slave controllers without any wires. Each controller has one universal input, one relay output and one user selected output. Features Benefits Expandable from 1 to 8 Process Control Loops Universal Transmitter or Temperature Sensor Inputs RS-485 Modbus Communication Dual Loop or Single Loop/Alarm Output Control Application:Oven, Boiler, or Chiller Control, Hot Plates/Melt Pots, Packaging Equipment, Environmental Chambers, Medical Equipment, Food Service Equipment Inputs:Thermocouple, RTD, DC Linear Voltage, and DC Currents Supply Voltage:24 VDC Power Consumption:3 W Operating Temperature:32 to 122 deg F [0 to 50 deg C] Memory Backup:Non-Volatile Specifications