This Honeywell Digital Controller is a high-performance microprocessor-based controller that offers a high degree of functionality and reliability. It is designed to control temperature, pressure, level, flow, and other process variables in applications such as environmental chambers, furnaces, ovens, packaging machines and other applications requiring variable PID (Proportional Integral Derivative) or On/Off control. The controller features a 4-digit process value (PV) and 4-digit set point (SP) LED display for easy reading. It also includes an auto-tuning function which automatically determines the optimal PID settings for the controlled process. The controller supports multiple input types including Thermocouple (TC), Resistance Temperature Detector (RTD), Direct Current Voltage (DCV), and Direct Current Current (DCC). It has two output channels: one for the control output and one for the alarm output. The control output can be configured as either relay or analog output. The alarm output can be configured as either relay or solid state relay drive output. The controller also provides RS485 communication interface supporting Modbus RTU protocol for remote monitoring and control.