1 Working voltage: DC 12V (6-24V) 2 Working current: 10-16MA 3 MODBUS RTU 03 06 16 control mode 4 Three functional modes can be by : 8 channel input/8 channel output/4 input 4 output 5 Input mode: support 3.3V/5V TTL level input, there are two input modes: low level input (default) and high level input In output mode: 5V TTL level, low level (default)/high level output In MODBUS mode, it can support up to 247 devices to be used in parallel Input port status supports query (default) and automatic reporting The default baud rate is 9600BPS, which can be configured to support 1200 2400 4800 19200 baud rate Application Automated industry PLC Digital in to RS485/RS485 to Digital out Smart Home,Home Automation ; Identification system; CCTV Camera PTZ Control; Security system; LED dot matrix screen; RS485 remote control; Colour: Green Material: Plastics Size: 44x31x15mm Weight: no Pin: 36 grams Package Contents: 4 x input Output module Only 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.