16 channels photoelectric isolation Input ports (NPN low level active) 16 channels Darlington output (ULN2803 NPN output) open "close" "Momentary" "Self-locking" "Interlock" "Delay" 6 Commands 16 inputs can remotely control 16 outputs of another board via RS485 bus (relevant registers must be set) MODBUS RTU command, Support 03 06 function code(Some registers support 16 function codes) Under the "Delay" command,the maximum delay is 255 seconds; MODBUS commands can be made serial HyperTerminal (serial assistant) OR "Modbus Poll" Enter; Under the MODBUS command mode, it can support up to 64 devices in parallel The default baud rate is 9600BPS. The baud rate can be selected through jumpers: 2400 4800 9600 19200BPS Maximum load: the maximum load current of each channel is 300MA Style: Only Board Material:plastic colour:Blue Package Contents: 3 * Module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.