Black Box RS-232 Manual
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Black Box RS-232 Manual

Black Box RS-232 Manual

Single-port pci card
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Download this manual See also: Instruction Manual, User Manual
NOVEMBER 2001
IC073C
IC074C-R2
Single-Port PCI Card—
RS-232/422/485/530
CUSTOMER
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
SUPPORT
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
INFORMATION
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com

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  • Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX SUPPORT FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 TRADEMARKS TRADEMARKS USED IN THIS MANUAL OS/2 and PS/2 are registered trademarks of International Business Machines Corporation. Windows and Windows NT are registered trademarks of Microsoft Corporation. UL is a registered trademark of Underwriters Laboratories Incorporated. Any other trademarks used in this manual are acknowledged to be the property of the trademark owners.
  • Page 3 SINGLE-PORT PCI CARD—RS-232/422/485/530 FEDERAL COMMUNICATIONS COMMISSION INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested...
  • Page 4 NOM STATEMENT NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
  • Page 5 SINGLE-PORT PCI CARD—RS-232/422/485/530 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del...
  • Page 6 CE COMPLIANCE CE Compliance Products bearing the CE label fulfill the requirements of the EMC directive (89/336/EEC) and of the low-voltage directive (73/23/EEC) issued by the European Commission. To obey these directives, the following European standards must be met: • EN55022 Class A — “Limits and methods of measurement of radio interference characteristics of information technology equipment.”...

  • Page 7: Table Of Contents

    SINGLE-PORT PCI CARD—RS-232/422/485/530 Contents Chapter Page 1. Specifications ......................7 2. Introduction ......................8 2.1 Overview ......................8 2.2 What’s Included ....................8 2.3 Technical Description ..................9 2.3.1 Isochronous Communications ..............9 2.3.2 Connector Pin Assignments ..............10 3. Card Setup ......................12 3.1 RS-485 Enable Modes ..................12 3.2 Address and IRQ Selection ................14...

  • Page 8: Specifications

    CHAPTER 1: Specifications 1. Specifications Communications Chip — IC073C: 16550; IC074C-R2: 16850 Number of Ports — Single RS-232/422/485/530 Maximum Data Rate — 460.8 kbps Maximum Data Distance — 5000 feet (1524 m), RS-422 Connectors — (1) DB25 male Temperature Range — Operating: 32 to 122°F (0 to 50°C);...

  • Page 9: Introduction

    RS-485 multidrop network. Up to 31 RS-485 devices can be connected to each port to automate your data collection. In both RS-232 and RS-422 modes, the card works seamlessly with the standard operating system serial driver. In RS-485 mode, our special auto-enable feature allows the RS-485 ports to be viewed by the operating system as a COM port.

  • Page 10: Technical Description

    2.3 Technical Description The Single-Port PCI Card provides an additional asynchronous serial port that can be set as RS-232 (for modems, printers, and plotters) or RS-422/485/530 for industrial automation and control applications. The Single-Port PCI Card uses the 16550 UART. This chip features programmable baud rates, data format, interrupt control, and 16-byte input and output FIFO.

  • Page 11: Connector Pin Assignments

    SINGLE-PORT PCI CARD—RS-232/422/485/530 2.3.2 C ONNECTOR SSIGNMENTS Table 2-1. RS-232 Signals (DB25 Male). Signal Name Pin # Mode Ground Receive Data Input Clear To Send Input Data Set Ready Input Transmit Clock Input Receive Clock Input Data Carrier Detect Input...
  • Page 12 CHAPTER 2: Introduction Table 2-2. RS-422/485/530 Pin Assignments (DB25 Male). Signal Name Pin # Mode Ground Receive Data Positive Input Receive Data Negative Input CTSB CTS+ Clear To Send Positive Input CTSA CTS- Clear To Send Negative Input TXCB TXC+ Transmit Clock Positive Input TXCA...

  • Page 13: Card Setup

    I/O control is abstracted from the application program. This ability means that you can effectively use the Single-Port PCI Card in an RS-485 application with existing (standard RS-232) software drivers. Header E4 is used to control the RS-485 mode functions for the driver circuit.
  • Page 14 CHAPTER 3: Card Setup transmitter) but it can confuse the system if the software does not. To select the No Echo mode, select the position marked “NE.” RS-485 M XAMPLES EADER Figure 3-1. Header E4, RS-422. Figure 3-2. Header E4, RS-485 Auto Enabled, with No Echo. Figure 3-3.

  • Page 15: Address And Irq Selection

    SINGLE-PORT PCI CARD—RS-232/422/485/530 Figure 3-4. Header E4, RS-485 RTS Enabled with No Echo. Figure 3-5. Header E4, RS-485 RTS Enabled with Echo. Figure 3-6. Header E4, RS-485 DTR Enabled with No Echo. 3.2 Address and IRQ Selection The Single-Port PCI Card is automatically assigned I/O addresses and IRQs by your motherboard BIOS.

  • Page 16: Line Termination

    CHAPTER 3: Card Setup 3.3 Line Termination Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive end only). A 120-ohm resistor is across each RS-422/485 input in addition to a 1K ohm pull-up/pull-down combination that biases the receiver inputs.

  • Page 17: Electrical Interface Selection

    SINGLE-PORT PCI CARD—RS-232/422/485/530 3.4 Electrical Interface Selection Each port on the Single-Port PCI Card can be used in either RS-232 or RS-422/485/530. This is selectable via two 24-pin DIP-shunts at E1 and E2. Use the following illustrations to help you configure your electrical interface.

  • Page 18: Clock Modes

    CHAPTER 3: Card Setup 3.5 Clock Modes The Single-Port PCI Card employs a unique clocking option that allows you to select from divide-by-4 and divide-by-1 clocking modes. These modes are selected at Header E8. To select the baud rates commonly associated with COM ports (2400, 4800, 9600, 19.2...115.2 kbps), place the jumper in the divide-by-4 mode (marked DIV4).

  • Page 19: Baud Rates And Divisors For The "Div1" Mode

    SINGLE-PORT PCI CARD—RS-232/422/485/530 3.6 Baud Rates and Divisors for the “Div1” Mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the “Div1” mode. For this data rate...

  • Page 20: Isochronous Clocking Jumpers

    CHAPTER 3: Card Setup 3.7 Isochronous Clocking Jumpers The Oxford Semiconductor 16850 allows for the reception of both the transmit and the receive clocks for isochronous communications (for a discussion of isochronous clocking, refer to Section 2.3.1) The three headers that allow the selection of either a modem control signal or the clock option are E5, E6, and E7.
  • Page 21 SINGLE-PORT PCI CARD—RS-232/422/485/530 Figure 3-14. Header E6, Modem Control Signal RI Selected as Input. Figure 3-15. Header E6, Clock Signal TXC Selected as Input. Figure 3-16. Header E7, Modem Control Signal DTR Selected as Output.
  • Page 22 CHAPTER 3: Card Setup Figure 3-17. Header E7, Clock Signal TSET Selected as Output.

  • Page 23: Installation

    SINGLE-PORT PCI CARD—RS-232/422/485/530 4. Installation 4.1 Operating System Installation Install the proper software for your Card before installing the hardware. For the IC073C, refer to the Serial Utility software for instructions. 4.2 System Installation The Single-Port PCI Card can be installed in any PCI expansion slot and contains several jumper straps for each port that must be set for proper operation.

  • Page 24: Appendix A. Troubleshooting

    6. For Windows 95/98 and Windows NT, the diagnostic tool “WinSSD” is installed in the Black Box folder on the Start Menu during the setup process. First find the ports using the Device Manager, then use WinSSD to verify that the ports are functional.

  • Page 25: Pci Com Number Selection In Windows 95/98

    A.3 Calling Black Box If you determine that your Single-Port PCI Card is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box at 724-746-5500. Before you do, make a record of the history of the problem. We will be able to...

  • Page 26: Shipping And Packaging

    APPENDIX A: Troubleshooting A.4 Shipping and Packaging If you need to transport or ship your Single-Port PCI Card: • Package it carefully. We recommend that you use the original container. • If you are shipping the Single-Port PCI Card for repair, make sure you include everything that came in the original package.

  • Page 27: Appendix B. Electrical Interface

    Appendix B. Electrical Interface B.1 RS-232 The standard PC serial port is an RS-232 port with either a DB25 or a DB9 connector. Basic RS-232 is capable of data rates up to 20 kbps at distances up to 50 feet (about 15 meters). Various improvements allow faster speeds on PC serial ports, but only over short distances.

  • Page 28: B.3 Rs-485

    Association) created the RS-530 specification to detail the pinout and define a full set of modem control signals that can be used for regulating flow control and line status. Like RS-232, the RS-530 specification defines two types of interface circuits: Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment...

  • Page 29: Appendix C. Asynchronous Communication

    SINGLE-PORT PCI CARD—RS-232/422/485/530 Appendix C. Asynchronous Communication In serial data communication, individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character. Data rate, error checking, handshaking, and character framing (start/stop bits) are pre- defined and must correspond at both the transmitting and receiving ends.
  • Page 30 APPENDIX C: Asynchronous Communication An extra bit used for error detection is often appended before the stop bits. This special bit is called the parity bit. Parity is a simple method of determining if a data bit has been lost or corrupted during transmission. There are several methods for implementing a parity check to guard against data corruption.

  • Page 31: Appendix D. Block Diagram

    SINGLE-PORT PCI CARD—RS-232/422/485/530 Appendix D. Block Diagram 3.5" 4.9" DIV1 DIV4 3.175"...
  • Page 32 © Copyright 2001. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

This manual is also suitable for:

Rs-422Rs-485Rs-530

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