1 Working voltage: DC 6.5-30V (9V 12V 24V)2 Working current: 8-50MA 3 16 optically isolated input ports, NPN input 4 16 Darlington transistor outputs (ULN2803 NPN output) 5 The default command has a variety of output modes: ''open'' ''close'' ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay'' 6 Commands 6 The input port can remotely control output port of another board via RS485 bus (relevant registers must be set) 7 MODBUS command 1 supports 03 06 16 function codes, MODBUS command 2 supports 01/02/03/05/06/15/16 function codes 8 The maximum delay of 1 MODBUS command is 255 seconds 9 In MODBUS command mode, up to 64 devices can be used in parallel 10 The default baud rate is 9600BPS, you can choose the baud rate by jumper:1200/2400/4800/19200/38400/57600/115200BPS 11 Sizes (with box): 130x80x30mm12 Weight (with box): 148g 13 Maximum load: the maximum load current of each channel is 300MA For more information, please contact me