ET-2217 is an 8-channel differential or 16-channel single-ended analog input module. All analog input channels can be individually configured with input ranges including ±150 mV, ±500 mV, ±1 V, ±5 V, ±10 V, 0 ~ 20 mA, 4 ~ 20 mA, and ±20 mA. The module can be set as voltage or current inputs via the DIP switch, providing up to 120 VDC overvoltage protection, as well as 50 mA overcurrent protection at 110 VDC/VAC.

The sampling rate of ET-2117 can be set to either fast mode (200 Hz) or normal mode (20 Hz) for recording voltage and current values. The module provide EMS (FET/ESD/Surge) protection and 3000 VDC I/O isolation to enhance noise protection capabilities in industrial environments.

ET-2217 supports the MQTT protocol, serving as a publisher and subscriber of messages. When connected to an MQTT Broker Server, it can publish real-time statuses of I/O in the form of topics and receive messages from subscribed topics. If a disconnection occurs between the module and the broker during communication, its mechanism for reconnecting can automatically restore the connection. Additionally, its Keep-Alive Interval mechanism ensures a continuous connection with the broker.

ET-2217 supports the SNMP V2c specification, enabling it to transmit both module and I/O information to SNMP network management devices or software (SNMP Network Management Software). This allows administrators to monitor module status in real-time. Additionally, if the Trap function is enabled, the module can proactively send messages to administrators when there are changes in I/O statuses or during restarts, keeping them informed of channel statuses at all times.