8-port RS-232 PCI boards

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Features and Benefits 

  • 8-port RS-232 high speed PCI communication board
  • Compact PCI board size
  • Versatile OS driver support
  • Various connection options
  • Data transmission speed up to 921.6 Kbps
  • On-chip hardware flow control
  • Easy configuration without switches or jumpers
  • Convenient connection cables



The Smartio C168H/PCI Series allows you to install additional RS-232 serial communication ports on your PC by providing 8 serial ports per board for connecting all types of serial devices, including terminals, modems, printers, data acquisition equipment, and more. And C168H/PCI’s versatile OS driver support truly fulfills the needs of our customers’ varied applications. This product is available for use on either a PCI bus, with both types offering a reliable and high performance solution for serial multiport communications. 



  • Easy to install
  • Compact board size—ideal for PC-based embedded systems
  • Low cost



  • PC-based POS registers
  • PC-based postal machines
  • PC-based Kiosks
  • PC-based lottery machines
  • Other serial device control applications
Comm. Controller 16C550C or compatible x 8
Bus PC/104 bus
Connector 40-pin box header
DIP Switches I/O base address, interrupt vector
Serial Interface
Number of Ports 8
Serial Standards RS-232
Max. No. of Boards per PC 4
Serial Line Protection
ESD Protection 15 kV on the board
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
IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12, 15 (shared for all ports)
FIFO 64 bytes
Serial Signals
Operating Systems
Windows Real COM Drivers Windows 95/98/ME/NT/2000, Windows XP/2003/Vista/2008 (x86/x64), DOS, Windows Embedded CE 5.0/6.0, Windows XP Embedded
Fixed TTY Drivers QNX 4, QNX 6
Linux Real TTY Drivers Linux 2.4.x, 2.6.x
Note Please refer to Moxa’s website for the latest driver support information.
Physical Characteristics
Dimensions 90 x 96 mm (3.54 x 3.78 in)
Environmental Limits
Operating Temperature
Standard Models: 0 to 55°C (32 to 131°F)
Wide Temp. Models: -40 to 85°C (-40 to 185°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Altitude Up to 2000 m
Note Please contact Moxa if you require products guaranteed to function properly at higher altitudes.
Standards and Certifications
EMI EN 55022, EN 61000-3-2, EN 61000-3-3, FCC Part 15 Subpart B Class A
EMS EN 55024, IEC 61000-6-2, IEC 61000-6-4, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11 (DIPS)
Green Product RoHS, CRoHS, WEEE
MTBF (mean time between failures)
Time 408,357 hrs
Database Telcordia (Bellcore), GB
Power Requirements
Power Consumption 265 mA @ 5 VDC
Warranty Period 5 years
Details See www.moxa.com/warranty

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Available Models

  Model No. Description
C168H/PCI PCI bus, 8-port smart serial board

Optional Accessories

Connection Boxes
  Model No. Description
OPT8A DB62(M) to 8 x DB25(F) Connection Box
OPT8S DB62(M) to 8 x DB25(F) Connection Box w/ Surge Protection
OPT8B DB62(M) to 8 x DB25(M) Connection Box
Connection Cables
  Model No. Description
CBL-M62M25x8-100 (OPT8C) DB62(M) to 8 x DB25(M) Cable
CBL-M62M9x8-100 (OPT8D) DB62(M) to 8 x DB9(M) Cable