Features: 1.16 Input 16 Output: 16 inputs of PLC expansion board can remotely control 16 outputs of another board via RS485 bus (relevant registers need to be set). 2.Multi Function: This RS485 remote control switch is multifunctional. 16 input 16 output expansion board has 6 commands, namely open, close, instantaneous, self locking, interlocking and delay, with strong functionality, can meet your uisng requirement. 3.Wide Application: This For Modbus RTU module is suitable for PLC IO expansion board, smart home, home automation, PTC camera, security surveillance, identification system, network camera, LED light driver and automatic curtain control. 4.Easy Installation: This RS485 remote control module is small and compact, with mounting holes, DIN35 and C45 rail installation design, backplane length is suitable for about 100mm / 3.9in printed circuit board board. 5.Easy Wiring: The 16 channel expansion board circuit has been repeatedly debugged, the printed circuit board wiring is simple and there is little interference, convenient to use specification:Item Type: PLC Expansion Board Material: Printed Circuit Board Insulation Class: VO Class Flame Retardant Working Voltage: DC 6.5-30V7.5V 9V 12V 15V 24V Working Current: 8-50mA Default Baud Rate: 9600BPS. Baud Rate Can Be Selected By Jumper: 2400 4800 9600 19200BPS PackageList:1 x PLCExpansionBoard