The CP-118U-I and CP-138U-I are 8-port serial boards designed for long distance, multi-point, PC-based data acquisition applications. Industrial automation system integrators will be eager to use these boards for many of their industrial automation projects.nnOn-chip ADDC? for precision RS-485 communication nRS-485 communication requires precise timing control to enable and disable the line driver, and the Moxa Turbo Serial Engine? chip that powers the CP-118U-I and CP-138U-I boards come with on-chip ADDC? (automatic data direction control) to make RS-485 as easy to use as RS-232. n nRS-485 multidrop for up to 31 devices within 1.2 km nThe CP-118U-I's 8 RS-232/422/485 ports and the CP-138U-I's 8 RS-422/485 ports can achieve data rates up to 921.6 kbps, and in RS-485 mode, one serial port can connect up to 31 daisy-chained RS-485 devices within a range of 1.2 km. In addition, the 2 kV electrical isolation protection on the CP-118U-I and CP-138U-I boards helps prevent equipment damage for long distance RS-485 communication.n nTop Serial PerformancenWith 20-plus years of experience in serial board design, Moxa is now concentrating on a new high performance serial data transmission chip. The Turbo Serial Engine? chip provides serial boards with a 128-byte FIFO, on-chip hardware and software flow control, and burst data mode. Thanks to the Turbo Serial Engine?, Moxa is able to offer the world's best performing smart serial boards.n nDrivers Provided for Windows, Linux, and UnixnMoxa continues to support a wide variety of operating systems, and the CP-118U-I and CP-138U-I boards are no exception. Reliable Windows COM and Linux/Unix TTY drivers are provided for most Moxa boards, and other operating systems, such as WEPOS, are also supported for embedded integration.

• Over 700 kbps data throughput for top performance
• 921.6 kbps maximum baudrate for super fast data transmission
• 128-byte FIFO and on-chip H/W, S/W flow control
• Compatible with 3.3/5 V PCI and PCI-X
• Drivers provided for a broad selection of operating systems, including the latest Windows and Linux
• Easy maintenance with on-board LED display, and management software
• Wide temperature model available for -40 to 85°C environments