The Moxa CP-134U Series is a dependable and high-performance 4-port serial board designed for Universal PCI systems in industrial automation applications. Supporting RS-422/485 on all ports and RS-232 on ports 1 and 2, this board excels in long-distance, multipoint data acquisition scenarios. Integrated ADDC® technology enables automatic data direction control for RS-485 signals, simplifying deployment even in complex networks.

With data rates up to 921.6 kbps and 128-byte FIFO, the CP-134U Series ensures reliable, high-speed transmission. Built around the Moxa Turbo Serial Engine™ chip, it supports both software and hardware flow control. The CP-134U-I variant provides 2 kV isolation for enhanced protection in harsh environments, and wide-temperature models are available for -40 °C operation. With drivers for Windows, Linux, and UNIX, this board is widely compatible and supports up to eight cards per system.

Technical Details (English):

Interfaces:

• 4 serial ports (2 x RS-232/422/485, 2 x RS-422/485)
• Connector: DB44 female
• FIFO: 128 bytes

Serial Standards:

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

Communication:

• 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: None, RTS/CTS, XON/XOFF
• Isolation: 2 kV (CP-134U-I only)

Bus and Hardware:

• 32-bit Universal PCI, 3.3 V / 5 V compatible
• MU860 controller (16C550C compatible)
• Supports up to 8 boards per PC
• Dimensions: 82.5 × 120 mm (standard), 115 × 120 mm (isolated)
• Input Current: 180 mA / 850 mA @ 5 V DC

Software Support:

• Windows (DOS to Win10/Server2019, CE, XP Embedded)
• Linux (Kernel 2.4 to 5.x)
• UNIX: QNX, Solaris, SCO, UnixWare, FreeBSD

Environmental Limits:

• Operating Temp: 0 to 55 °C (standard), -40 to 85 °C (wide temp)
• Storage Temp: -40 to 85 °C
• Humidity: 5–95% RH (non-condensing)

Certifications:

• EMI: CISPR 32, FCC Part 15B
• EMS: IEC 61000-4-2/3
• MTBF: 480,209 hrs (Telcordia SR332)
• Environmental: RoHS, CRoHS, WEEE

Package Contents:

• 1 x CP-134U or CP-134U-I serial board
• 1 x M44 to 4 x DB9-M or DB25-M cable (model dependent)
• Quick installation guide, substance disclosure, warranty card