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 Commands16 inputs can remotely control 16 outputs of another board via RS485 bus (relevant registers must be set)MODBUS RTU , Support 03 06 function code(Some registers support 16 function codes)Under the "Delay" ,the maximum delay is 255 seconds;MODBUS commands can be made serial HyperTerminal (serial assistant) OR "Modbus Poll" Enter;Under the MODBUS mode, it can support up to 64 devices in parallelThe default baud rate is 9600BPS. The baud rate can be through jumpers: 2400 4800 9600 19200BPSMaximum load: the maximum load current of each channel is 300MAStyle: Only BoardMaterial:plasticcolour:BluePackage Contents:1 * ModuleOnly the above package content, other products are not included.Note: Light reflection 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.