Keyence N-400

The Keyence N-400 multi-drop controller controls the communication between Keyence BL Series bar code readers.

The N-400 can control up to thirty-one BL series units using a host computer, enabling the multi-drop link configuration. The communication path is an RS-485 cable, which provides high noise-resistance and enables data transmission over a long distance (up to 1.2 km).

The N400 controls the complicated communication (RS-485 communication) between each BL series and the N-400. Since the host computer works only for communication with the N 400, it can be operated with a simple program. This enhanced functionality partially eliminates the need for programming the host computer.