Sealevel SeaI/O and SeaDAC devices are fully compatible with other Modbus compliant devices, PLCs and applications. Many third-party software applications and PLCs support interfacing digital I/O devices via the Modbus protocol. Sealevel devices with USB, RS-232, or RS-485 interfaces use the Modbus RTU protocol. Sealevel devices with Ethernet or Wireless interfaces use the Modbus TCP protocol. Detailed information is included in the documentation installed with the Sealevel SeaMAX software.
Modbus information is available at www.modbus.org.