1: Working voltage: DC 6.5-30V (9V 12V 24V) 2: Working current: 8-50MA 3: 16 channels photoelectric isolation Input ports (NPN low level active ) 4: 16 channels Darlington output (ULN2803 NPN output) 5: ''open'' ''close'' ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay'' 6 Commands 6: 16 inputs can remotely control 16 outputs of another board via RS485 bus (relevant registers must be set) 7: MODBUS RTU command, Support 03 06 function code(Some registers support 16 function codes) 8: Under the ''Delay'' command ,the maximum delay is 255 seconds; 9 MODBUS commands can be made serial HyperTerminal (serial assistant) OR ''Modbus Poll'' Enter; 10 Under the MODBUS command mode, it can support up to 64 devices in parallel 11 The default baud rate is 9600BPS. The baud rate can be selected through jumpers: 2400 4800 9600 19200BPS 12 Size: 100 * 72 * 20mm(Only PCB Board);120 * 88* 42mm(with Din Rail Box) 13 Weight: 64g(Only PCB Board);143g(with Din Rail Box) 14 Maximum load: the maximum load current of each channel is 300MA For more information, please contact me DIN rail Box parameters: Product model: UM72 Color: green Width: suitable for PCB board width UM72(72mm) Insulation grade: flame-retardant VO grade Backplane length: suitable for 100 mm PCB boards Net weight: 72g Installation: DIN35 and C45 rail