This board is an interface module for microcontroller. There are four channels of digital input and four channels of relay output. The digital input circuit is installed an opto-isolator in order to protect the MCU from misusing an external signal. Acceptable voltage range for this module is between 12 and 24 VDC. For the output part, there is a SPDT relay at 5A/220VAC.

Key Features

• Input Isolator 4 Channels
• Input Voltage 12-24 VDC
• Output Relay 4 Channels
• Relay Supply 24 VDC