Fangrui Product Details N4d3e16 Dc 12v 24v 16 In 16 Out Rs485 Remote Control Switch Plc Io Expansion Board Modbus Rtu Module 1xdc 12v 24v 16ch Input 16ch Output Rs485 Modbus Rtu Module 6 Photoelectrically Isolated Input Ports (npn Active Low Level) Application: Plc Io Expansion Board, Smart Home, Home Automation, Smart Home; Ptc Camera, Security Monitoring, Identification System; Network Camera, Led Light Driver, Automatic Curtain Control, Modbus Rtu Instruction, Supports 03 06 Function Code (some Registers Support 16 Function Code) Description: 1. Working Voltage: Dc 6.5-30v (7.5v 9v 12v 15v 24v) 2. Working Current: 8-50ma 3. 16 Photoelectrically Isolated Input Ports (npn Active Low Level) 4. 16 Channels Of Darlington Output (uln2803 Npn Output) 5. Open Close Instant Self-locking Interlocking Delay 6 Commands 6. 16 Inputs Can Remotely Control The 16 Outputs Of Another Board Through The Rs485 Bus (relevant Registers Need To Be Set) 7. Modbus Rtu Instruction, Supports 03 06 Function Code (some Registers Support 16 Function Co