Desarrollados para satisfacer las necesidades de las aplicaciones tradicionales de automatización de plantas de producción, los dispositivos de adquisición de datos SeaI/O RS-485 son compatibles con el protocolo Modbus RTU estándar de la industria. Esto permite que los dispositivos Sea I/O DAQ funcionen con una amplia variedad de PLC y controladores Modbus de terceros.
| Model | Description |
| 410M | RS-485 Modbus RTU Interface to 16 Isolated Inputs / 16 Reed Relay Outputs |
| 420M | RS-485 Modbus RTU Interface to 16 Isolated Inputs / 8 Form C Relay Outputs |
| 430M | RS-485 Modbus RTU Interface to 16 Isolated Inputs / 8 Form C Relay Outputs |
| 440M | RS-485 Modbus RTU Interface to 32 Reed Relay Outputs |
| 450M | RS-485 Modbus RTU Interface to 16 Form C Relay Outputs |
| 462M | RS-485 Modbus RTU Interface to 96 Channel TTL Digital Interface |
| 462M-KT | RS-485 Modbus RTU Interface to 96 Channel TTL Digital Interface Kit - 462M + (2) CA237 Cables |
| 463M | RS-485 Modbus RTU Interface to 96 Channel TTL Digital Interface |
| 470M | RS-485 Modbus RTU Interface to 16 A/D, 2 D/A, 8 Open-Collector Outputs, 8 Isolated Inputs Multifunction Module |
| 520M | RS-485 Modbus RTU Interface to 8 Isolated Inputs / 8 High-Current Form C Relay Outputs |
| 530M | RS-485 Modbus RTU Interface to 16 Isolated Inputs / 16 Open-Collector Outputs |
| 540M | RS-485 Modbus RTU Interface to 32 Open-Collector Outputs |
| 570M | RS-485 Modbus RTU Interface to 8 16-bit A/D, 8 Isolated Inputs, 8 Form C Relay Outputs Multifunction Module |