Here are some key features and capabilities of the CJ1W-EIP21 module:

Ethernet/IP Communication: The module supports the Ethernet/IP protocol, which is widely used in industrial automation for real-time data exchange and control.

Multiple Connections: It supports up to eight simultaneous connections, allowing the CJ-series PLC to communicate with multiple devices or systems at the same time.

Tag-based Data Exchange: The module uses a tag-based data exchange model, which simplifies the configuration and mapping of data between the PLC and connected devices.