The TRP-C68 is an 8-channel Analog to Digital Converter (ADC) which takes an analog input signal and converts the input into a digital output signal. It supports both ASCII and Modbus protocol.  It accepts analog input-a voltage or a current-and support the sample rate in “ Normal ” or “Fast” mode.  All channels feature screw terminals for convenient connection, and LED’s to indicate channel status.  All inputs are provided with isolation and surge protection to protect the module against high voltage spikes, as well as ground potential differences.  The TRP-C68 supports both ASCII and Modbus protocol. With a full set of commands, dual watch-dog and auto reset function, the module can be controlled remotely by the PC in ASCII or Modbus RTU protocol.