Available. The Keyence N-400K is an RS-485 master unit designed for multi-drop control in barcode reading applications. It supports connection with up to 31 barcode readers from the BL-700, BL-600, and BL-180 series, facilitating efficient management of multiple devices through a single host computer. The N-400K operates over a communication distance of up to 1.2 kilometers, ensuring flexibility in system design. It offers communication speeds ranging from 600 to 38,400 bps, with data bit lengths of 7 or 8 bits and stop bit lengths of 1 or 2 bits, accommodating various system requirements. The device is equipped with one RS-485 input and one RS-232C input, both supporting ASCII transmission codes. The N-400K is built to withstand environmental conditions, operating within a temperature range of 0 to +55°C and a humidity range of 35 to 85% RH (non-condensing). It has a vibration resistance of 10 to 57 Hz with a double amplitude of 0.3 mm, and 57 to 500 Hz with an acceleration of 2 G, ensuring reliable performance in industrial settings. The unit has a compact design, weighing approximately 180 grams, making it suitable for integration into various automation systems.