PCI-COM2S

2-port PCI RS-232/422/485 Serial Communication Card

PCI-COM2S

The PCI-COM2S is a dual-port, asynchronous serial communications card designed for use in PCI-Bus computers. The board is 165mm long and may be installed in any 3.3V or 5V PCI or PCI-X slot. Each independent port supports RS-232, RS-422 and RS-485 transmission and has the capability to add bias voltage. (RS-485 communication requires that one transmitter in the network must supply a bias voltage to ensure a known "zero" state when all transmitters are OFF). Also, receiver inputs at each end of the network should be terminated to eliminate ringing. The PCI-COM2S supports these options by means of jumpers on the card. Type 16550 UARTs are used as the asynchronous communication elements. These include a 16-byte transmit/receive FIFO buffer to protect against lost data in multitasking systems while maintaining 100 percent compatibility with the original IBM serial port. A crystal oscillator is located on the card and permits precise baud rate capability up to 115,200. Higher baud rates, up to 460,800 baud, are achieved by changing a jumper on the card. The driver/receivers used, type 75ALS180, are capable of driving extremely long communication lines at high baud rates. They can drive up to ±60 mA on balanced lines and receive inputs as low as 200 mV differential signal superimposed on common mode noise of +12V to -7V. In case of communication conflict, the driver/receivers feature thermal shutdown.

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Details

The PCI-COM2S is a dual-port, asynchronous serial communications card designed for use in PCI-Bus computers. The board is 165mm long and may be installed in any 3.3V or 5V PCI or PCI-X slot. Each independent port supports RS-232, RS-422 and RS-485 transmission and has the capability to add bias voltage. (RS-485 communication requires that one transmitter in the network must supply a bias voltage to ensure a known "zero" state when all transmitters are OFF). Also, receiver inputs at each end of the network should be terminated to eliminate ringing. The PCI-COM2S supports these options by means of jumpers on the card. Type 16550 UARTs are used as the asynchronous communication elements. These include a 16-byte transmit/receive FIFO buffer to protect against lost data in multitasking systems while maintaining 100 percent compatibility with the original IBM serial port. A crystal oscillator is located on the card and permits precise baud rate capability up to 115,200. Higher baud rates, up to 460,800 baud, are achieved by changing a jumper on the card. The driver/receivers used, type 75ALS180, are capable of driving extremely long communication lines at high baud rates. They can drive up to ±60 mA on balanced lines and receive inputs as low as 200 mV differential signal superimposed on common mode noise of +12V to -7V. In case of communication conflict, the driver/receivers feature thermal shutdown.

Ordering Info

  • PCI-COM-2S: 2-port PCI RS-232/422/485 Serial Communication Card

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Specification

  • Universal PCI, PCI-X, 3.3V and 5V compatible
  • Dual-port serial communications card for PCI bus
  • Supports RS-232, RS-422, and RS-485 protocols
  • Automatic control of RS-485 driver under Windows systems
  • Includes type 16550 UART with 16-byte FIFO buffers
  • Baud rates up to 460,800 baud
  • Detected as standard COM ports under Windows 95/98/98se/NT4/NT2000/XP/2003/etc
  • No base address or IRQ switches to set

Delivery Information

Orders placed by EMEA customers will be delivered by DHL.

Payment Methods & Options

Accepted payment options for EMEA customers include VISA, Mastercard or bank transfer in GBP.

ACCES I/O: Warranty and Service Information

All ACCES I/O products distributed in the EMEA come with a 2 year warranty as standard, with additional extension options available upon request. As an official ACCES I/O partner, we are proud to provide customers with peace of mind and the highest quality products, including any systems which have been configured to meet individual specifications.

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