General description The 2X DC 12V 24V 16 Input Output RS485 Remote Control Switch PLC Expansion Board IO Module is designed for efficient control and automation. It features 16-channel photoelectric isolation input ports and 16-channel output capabilities, allowing for versatile control options including open, close, momentary, self-locking, interlock, and delay commands. Technical specifications Input ports: 16-channel photoelectric isolation (NPN low level active) Output ports: 16-channel (NPN output ULN2803) Maximum load current per channel: 300 mA Maximum delay under "Delay" command: 255 seconds Default baud rate: 9600 Selectable baud rates via jumpers: 2400, 4800, 9600, 19200 Style: Single board Material: Plastic Color: Blue Measurement allowed error: +/- 1-3 cm Compatibility and accessories Supports up to 64 devices in parallel under MODBUS command mode Compatible with MODBUS RTU command, supporting function codes 03 and 06 Can be controlled via serial HyperTerminal or "Modbus