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4-port RS-422/485 smart Universal PCI serial boards with 2 KV isolation protection


Features and Benefits

  • Over 700 Kbps data throughput for top performance
  • 921.6 Kbps maximum baudrate for super fast data transmission
  • ADDC® provides automatic data direction control for RS-485 signals
  • 128-byte FIFO and on-chip H/W, S/W flow control
  • Compatible with 3.3/5V PCI and PCI-X
  • Drivers provided for Windows (Vista, 2003, XP, 2000), WinCE 5.0, Linux, and Unix
  • 15 KV ESD protection on the board
  • Added bonus! Ports 1 and 2 support RS-232 and RS-422/485


The CP-134U and CP-134U-I 4-port universal PCI boards are designed for industrial automation applications that require a long distance,multi-point, PC-based data acquisition solution.

On-chip Automatic Data Direction Control for precision RS-485 communication

RS-485 communication requires precise timing control to enable and disable the line driver. The Moxa Turbo Serial Engine™ chip that powers the CP-134U board comes with on-chip ADDC®, which makes RS-485 as easy to use as RS-232.

RS-485 multidrop for up to 31 devices within 1.2 km

The CP-134U universal PCI board has 4 RS-422/485 serial ports, each of which can achieve data rates up to 921.6 Kbps. In RS-485 mode,the board can connect up to 31 daisy-chained RS-485 devices within a range of 1.2 km. For long distance RS-485 communication, choose the CP-134U-I, which comes with 2 KV optical isolation protection to prevent equipment damage.

Drivers Provided for Windows, Linux, and Unix

Moxa continues to support a wide variety of operating systems, and the CP-134U and CP-134U-I boards are no exception. Reliable Windows COM and Linux/Unix TTY drivers are provided for all Moxa boards, and other operating systems, such as WEPOS, are also supported for embedded integration.

• Hardware
Comm. Controller MU860 (16C550C compatible)
Bus 32-bit Universal PCI
Connectors for External Antenna DB44 female

• Serial Interface
Serial Standards RS-232/422/485
Number of Ports 4
Number of Boards 4 per PC (max.)
Serial Line Protection ESD Protection: 15 KV on the board
Isolation 2 KV (only for CP-134U-Is RS-422/485)

• Performance
Baudrate 50 bps to 921.6 Kbps

• Serial Communication Parameters
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control RTS/CTS, XON/XOFF
I/O Address Assigned by BIOS
IRQ Assigned by BIOS

• Serial Signals
RS-422 TxD+(B), TxD-(A), RxD+(B), RxD-(A), RTS+(B), RTS-(A), CTS+(B), CTS-(A), GND
RS-485-4w TxD+(B), TxD-(A), RxD+(B), RxD-(A), GND
RS-485-2w Data+(B), Data-(A), GND

• Driver Support
Operating Systems Windows (2000, XP/2003/Vista x86/x64, 9X/ME/NT), Windows CE 5.0, Windows XP Embedded, DOS, Linux 2.4/2.6, FreeBSD 4/5, QNX 6

• Physical Characteristics
Dimensions CP-134U: 82.5 x 120 mm (3.24 x 4.72 in)
CP-134U-I: 115 x 120 mm (4.52 x 4.72 in)

• Environmental Limits
Operating Temperature 0 to 55C (32 to 131F)
Operating Humidity 5 to 95% RH
Storage Temperature -20 to 85C (-4 to 185F)
Regulatory Approvals EN55022, EN55024, EN61000-3-2, EN61000-3-3, IEC61000-4-2, IEC61000-4-3, IEC61000-4-4, IEC61000-4-5, IEC61000-4-6, IEC61000-4-8, IEC61000-4-11, FCC Part 15 Class B

• Power Requirements
Power Consumption CP-134U: 180 mA @ +5 V
CP-134U-I: 850 mA @ +5 V

• Warranty
Warranty Period 5 years
Universal PCI Boards
  Model No. Introduction


4-port RS-422/485 Board (DB9 or DB25 cable included)


4-port RS-422/485 Board with 2 KV Isolation Protection (DB9 or DB25 cable included)


4-port RS-422/485 Universal PCI serial board with optional isolation, -40 to 85C operating temperature


4-port RS-422/485 Universal PCI serial board, -40 to 85C operating temperature