4-port RS-422/485 Mini PCI Express boards

Manufacturer: MOXA
Manufacturer: MOXA
  • Mini PCIe interface support
  • 921.6 kbps maximum baudrate for fast data transmission
  • 128-byte FIFO and on-chip H/W, S/W flow control
  • Drivers provided for a broad selection of operating systems, including Windows and Linux
  • DIP switch for 120-ohm terminal resistance
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    4-port RS-422/485 Mini PCI Express serial board with 2.5 kV capacitive isolation, -40 to 85°C operating temperature
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    4-port RS-422/485 Mini PCI Express serial board with 2.5 kV capacitive isolation, -40 to 85°C operating temperature
    Availability: Out of stock
    Net price:



The CP-134N is a Mini PCI Express multiport serial board is designed for various applications and users such as system integrators, and industrial automation system and industrial PC manufacturers. It is compatible with all popular operating systems and supports data rates of up to 921.6 kbps.

The serial board also provides 1 kV line-to-line surge protection and 2.5 kV isolation, ensuring compatibility with a wide range of industrial environments. Furthermore, it also includes a DIP switch for easily adjusting the terminal and pull-high/low resistors for various environments and applications.

A New Family of Mini PCI Express Multiport Serial Boards for Faster Time to Market

Moxa's new Mini PCI Express multiport serial board family fulfills the need for customized expansion and enables faster time to market for OEMs and system integrators. It includes isolated and non-isolated RS-232/422/485 communication cards for various applications.

The serial boards feature high performance 16C950 compatible UARTs and are available in 4-port and 2-port versions compatible with all popular operating systems. They support date rates of up to 921.6 kbps and have 128-byte transmit and receive FIFOs. The serial boards can operate in the -40 to 85C temperature range. Door backets are included in the package for all models, enabling the installation of the serial boards in a Moxa IPC expansion slot.

Technical Specification

  • Serial Interface
Comm. Controller 16C550C compatible
Bus Mini PCI Express
Connector DB9 male
FIFO 128 bytes
No. of Ports 4
Serial Standards RS-422 RS-485
Baudrate 50 bps to 921.6 kbps (supports non-standard baudrates)
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None Even Odd Space Mark
Flow Control None XON/XOFF
Isolation 2.5 kV
  • Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
  • Serial Software Features
Windows Drivers Windows 7/8/8.1/10/11 (x86/x64), Windows 2008 R2/2012/2012 R2/2016/2019 (x64), Windows Server 2022
Linux Drivers Linux kernel 4.x Linux kernel 5.x
  • Power Parameters
Input Current 714 mA @ 3.3 VDC
  • Physical Characteristics
Dimensions 30 x 50.95 mm (1.18 x 2 in)
  • Environmental Limits
Operating Temperature -40 to 85°C (-40 to 185°F)
Storage Temperature (package included) -20 to 85°C (-4 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
  • Standards and Certifications
EMC EN 55032/35
EMI CISPR 32, FCC Part 15B Class B
EMS IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV IEC 61000-4-5 Surge: Power: 2 kV; Signal: 1 kV IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m IEC 61000-4-8 PFMF
  • Declaration
Green Product RoHS, CRoHS, WEEE
  • MTBF
Time 2,412,169 hrs
Standards Telcordia (Bellcore) Standard TR/SR
  • Warranty
Warranty Period 5 years
Details See www.moxa.com/warranty

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