Available. The Keyence KV-L21V is a Serial Communication Unit designed for seamless integration with Keyence's programmable logic controllers (PLCs), including the KV-8000 series. This module facilitates robust serial communication, supporting various protocols to enhance system connectivity and data exchange. Key features include dual communication ports: Port 1 offers RS-232C connectivity, while Port 2 provides versatile options, allowing selection between RS-232C, RS-422A, or RS-485 (both 4-wire and 2-wire configurations). The module supports transmission speeds ranging from 1,200 to 230,400 bps, accommodating diverse application requirements. Transmission modes include full-duplex for RS-232C/RS-422A/RS-485 (4-wire) and half-duplex for RS-485 (2-wire). Transmission distances vary based on the protocol: RS-232C supports up to 15 meters, whereas RS-422A/RS-485 (4-wire and 2-wire) can extend up to 1,200 meters, with a maximum of 500 meters at 230,400 bps. The KV-L21V operates with a maximum internal current consumption of 120 mA and has a weight of approximately 150 grams. This module is ideal for applications requiring reliable and flexible serial communication within industrial automation systems.