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
I/O Controller 16C550C or compatible x 8
Bus PCI ver. 2.1 (32-bit)
Serial Interface
Maximum No. of Ports 32 (4 boards)
Speed 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
I/O Address Assigned by BIOS
IRQ Assigned by BIOS
Driver Support
Operating Systems Windows 95/98/ME/NT/2000/XP/2003, Linux, DOS, AT&T UNIV SVR4.2, MITUX DVR4.2, UnixWare SVR4.2, UnixWare7, SCO OpenServer, SCO Unix, SCO XENIX, QNX 4.2x, FreeBSD
Physical Charateristics
Dimensions 123 x 100 mm (W x D)
Environmental Limits
Operating Temperature 0 to 55°C
Storage Temperature -20 to 85°C
Ambient Relative Humidity 5 to 95% RH
Standards and Certifications
Regulatory Approvals FCC, CE
Power Requirements
Power Consumption 260 mA (+5V), 100 mA (+12V), 60 mA (-12V)
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) RS-232 Connection Box
OPT8S DB62(M) to 8 x DB25(F) RS-232 Connection Box w/ Surge Protection
OPT8B DB62(M) to 8 x DB25(M) RS-232 Connection Box
Connection Cables
  Model No. Description
CBL-M62M25x8-100 (OPT8C) DB62(M) to 8 x DB25(M) Cable [RS-232]
CBL-M62M9x8-100 (OPT8D) DB62(M) to 8 x DB9(M) Cable [RS-232]