Features: Widely applicable, expand your control capabilities with the 16 Input 16 Output RS485 Remote Control Switching Board. This switching board is designed for easy operation and can handle a load current of up to 300MA per channel. Suitable for DIY enthusiasts and individuals looking for reliable control option . Create a more convenient and automated environment with this switching, perfect for security monitoring and LED light control. Simplifies your electronic device control with this remote control switching board. Specifications: load current per channel :300MA Pacckage optionals : with / without rails Insulation level: Flame retardant level Working voltage: DC6.5-30V (7.5V 9V 12V 15V 24V) Working current: 8-50MA 16 photoelectric isolation input ports 16 Darlingtons outputs 6 commands for 'turn on', 'turn off', 'instants', 'self-locking', 'interlock', and 'delay' 16 inputs can be remotely controlled through the RS485 bus to control the 16 outputs of another board (relevant registers need to be set) Rate can be selected through jumper: 2400 4800 9600 19200BPS Size: approx 100x72x20mm/3.94x2.83x0.79in (board only) 120x88x42mm/4.72x3.46x1.65in (with rail box) Weight: 64g ( board only); 143g (with guide box) Note: Due to the problems of lighting effect and shooting angles, there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement. Package includes: 1PC RS485 Remote Control Board