The CP-118U/138U Series from Moxa consists of intelligent 8-port Universal PCI serial boards designed for high-demand industrial applications. Both models support data transmission rates up to 921.6 kbps and are compatible with both 3.3 V and 5 V PCI as well as PCI-X slots, ensuring wide applicability across server platforms.

The CP-118U supports RS-232, RS-422, and RS-485 interfaces, while the CP-138U is dedicated to RS-422/485. Featuring full modem control signals and 128-byte FIFO buffers, these cards deliver stable and high-performance serial communication. Built-in Tx/Rx LEDs facilitate maintenance, and a wide-temperature version (-40 to 85 °C) is available for harsh environments.

Technical Details:

Interface Specifications:

• Controller: MU860 (16C550C compatible)
• Bus: 32-bit Universal PCI (3.3 V/5 V compatible)
• Connector: DB62 female (standard), DB78 female (isolated models)
• FIFO: 128 bytes
• Ports: 8 serial ports
• Max. Boards per PC: 8
• Serial Standards:
• CP-118U: RS-232, RS-422, RS-485
• CP-138U: RS-422, RS-485
• Baudrate: 50 bps to 921.6 kbps
• Data Bits: 5, 6, 7, 8
• Stop Bits: 1, 1.5, 2
• Parity: None, Even, Odd, Space, Mark
• Flow Control:
• CP-118U: None, RTS/CTS, XON/XOFF
• CP-138U: None, XON/XOFF

Signal Pinout:

• RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
• RS-422: Tx±, Rx±, GND
• RS-485-4w: Tx±, Rx±, GND
• RS-485-2w: Data±, GND

Driver Support:

• Windows: DOS to Windows 10 (x86/x64), Windows Server 2008–2019, Embedded CE/XPe
• Linux: Kernel 2.4.x to 5.x
• UNIX: QNX 6, SCO OpenServer, UnixWare 7, Solaris 10, FreeBSD

Other Features:

• Operating Temperature: -40 to 85 °C (Wide Temp. models)
• Storage Temperature: -40 to 85 °C
• Humidity: 5–95% (non-condensing)
• LED Indicators: Tx/Rx for each port
• EMC/EMI: EN 55032/35, CISPR 32, FCC Part 15B Class B
• EMS: IEC 61000-4-2, -4-3
• MTBF:
• CP-118U: 1,073,385 hrs
• CP-138U: 1,147,210 hrs
• Certifications: RoHS, CRoHS, WEEE
• Warranty: 5 years