PCI-ICM-1S

1-port PCI Isolated RS-422/485 Serial Communication Card

PCI-ICM-1S

The PCI-ICM-1S is a single port asynchronous optically isolated serial communication card that can be installed in any 3.3V or 5V PCI slot computer. Data lines are opto-isolated from the computer and from each other to assure communication even when large common mode voltages and noise are imposed. The card supports RS-422 and RS-485 balanced-mode transmission/reception. Each card has 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 card 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 multi-tasking 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 baud. Higher baud rates, up to 460,800 baud, are achieved by changing a jumper on the card. The driver/receivers used, type 75176, 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. When the card is first installed, the operating system will detect it as new hardware and assign it an IRQ number and base address. There are no switches to set or base addresses to assign, making it easy to use. From this point on, the card behaves as a standard COM port.

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Details

The PCI-ICM-1S is a single port asynchronous optically isolated serial communication card that can be installed in any 3.3V or 5V PCI slot computer. Data lines are opto-isolated from the computer and from each other to assure communication even when large common mode voltages and noise are imposed. The card supports RS-422 and RS-485 balanced-mode transmission/reception. Each card has 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 card 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 multi-tasking 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 baud. Higher baud rates, up to 460,800 baud, are achieved by changing a jumper on the card. The driver/receivers used, type 75176, 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. When the card is first installed, the operating system will detect it as new hardware and assign it an IRQ number and base address. There are no switches to set or base addresses to assign, making it easy to use. From this point on, the card behaves as a standard COM port.

Ordering Info

  • PCI-ICM-1S: 1-port PCI Isolated RS-422/485 Serial Communication Card

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Specification

  • Universal PCI, PCI-X, 3.3V and 5V compatible
  • Optically isolated, asynchronous serial communications
  • Supports RS-422 and RS-485 protocols
  • Automatic control of RS-485 driver under all operating systems
  • Includes type 16550 UART with 16-byte FIFO buffers
  • Baud rates up to 460,800 baud
  • Detected as standard COM port by all operating systems
  • No base address or IRQ switches to set

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Warranty & Service Information for ACCES I/O Products (United States)

Assured Systems are proud to be an official partner of ACCES I/O providing a 2 year warranty on all products supplied within the USA, including products that have been customized. Extension options are also available for your convenience. Get the reliability you need with products and services from Assured Systems.

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