1,16 In 16 Out: The PLC expansion board has 16 inputs that can remotely control the 16 outputs of another board via the RS485 bus (related register settings are necessary). 2,Multifunction: The 16 input 16 output expansion board features six commands, namely turn on, turn off, instant, self locking, interlock, and delay, better meet your usage requirements. 3,Application: The RS485 module is widely used in PLC IO expansion boards, smart homes, home automation, PTC cameras, security monitoring, identification systems, network cameras, LED light drivers, and automatic curtain controls. 4,Simple Wiring: The circuit of the 16 channel expansion board has been repeatedly debugged. The PCB wiring is simple, with minimal interference, and convenient to use. 5,Easy Installation: The compact power expansion module comes with mounting holes, has a DIN35 and C45 rail installation design and the backplate length is suitable for approximately 100mm or 3.9 inch PCB boards. Item Type: 16 Input 16 Output Expansion Board Material: PCB Insulation Grade: flame retardant VO grade Operating Voltage: DC 6.5-30V (7.5V 9V 12V 15V 24V) Operating Current: 8-50MA Default Baud Rate: 9600BPSBaud Rate Can Be Selected By Jumper: 2400 4800 9600 19200BPS 1 x 16 Input 16 Output Expansion Board Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.