Black Box RS-422 User Manual
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Black Box RS-422 User Manual

Black Box RS-422 User Manual

Single-port pci card
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Download this manual See also: Instruction Manual, Manual
MAY 2002
IC971C
RS-422/485/530
Single-Port PCI Card
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: 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.: Call 877-877-BBOX (outside U.S. call 724-746-5500) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 FCC AND IC RFI STATEMENTS FEDERAL COMMUNICATIONS COMMISSION and INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS Class B Digital Device. This equipment has been tested and found to comply with the limits for a Class B computing device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 3 RS-422/485/530 SINGLE-PORT PCI CARD • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult an experienced radio/TV technician for help. CAUTION Changes or modifications not expressly approved by the party responsible for compliance could void the user’s...
  • Page 4 EU DECLARATION OF CONFORMITY EUROPEAN UNION DECLARATION OF CONFORMITY This equipment complies with the requirements of the European EMC Directive 89/336/EEC.
  • Page 5 RS-422/485/530 SINGLE-PORT PCI CARD 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 6 NOM STATEMENT 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor. 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato.
  • Page 7 RS-422/485/530 SINGLE-PORT PCI CARD TRADEMARKS USED IN THIS MANUAL OS/2 and PS/2 are registered trademarks of International Business Machines Corporation. Windows and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

  • Page 8: Table Of Contents

    2.3 Factory-Default Settings....11 2.4 Technical Description ....11 2.5 RS-422/485/530 DB25 Male DTE Connector Pin Assignments ..12 Card Setup .
  • Page 9 Appendix B. Electrical Interfaces ....25 B.1 RS-422 ......25 B.2 RS-485 .

  • Page 10: Specifications

    CHAPTER 1: Specifications 1. Specifications UART: 16850 Connector: (1) DB25 male Interface: RS-422/485/530 Temperature Tolerance: Operating: 32 to 122°F (0 to 50°C); Storage: -4 to +158°F (-20 to +70°C) Relative Humidity: 10 to 90%, noncondensing MTBF: Greater than 150,000 hours (calculated) Power: +5 VDC, 480 mA Size: 2.5"H x 4.9"W (6.3 x 12.5 cm), excluding...

  • Page 11: Introduction

    RS-422/485/530 SINGLE-PORT PCI CARD 2. Introduction 2.1 Overview The RS-422/485/530 Single-Port PCI Card is a one- channel PCI Bus serial I/O adapter. It provides one field-selectable RS-422/485/530 serial port that supports asynchronous data rates up to 460.8 kbps. Choose the RS-422 mode for long-distance device connections up to 4000 ft.

  • Page 12: What The Package Includes

    , Advanced COM drivers, utilities, INF files, help files, and this users’ manual in PDF format. If either item is missing or damaged, contact Black Box at 724-746-5500. 2.3 Factory-Default Settings When shipped from the factory, the PCI Card’s DB25 port is configured as RS-530.

  • Page 13: Rs-422/485/530 Db25 Male Dte Connector Pin Assignments

    RS-422/485/530 SINGLE-PORT PCI CARD The Card uses a 16850 UART. This chip features programmable baud rates, data format, interrupt control, and an industry-leading 128-byte FIFOs. 2.5 RS-422/485/530 DB25 Male DTE Connector Pin Assignments Signal Name Pin # Mode Ground —...

  • Page 14: Card Setup

    Some communication software packages refer to RS-485 as RTS enable or RTS block mode transfer. One of the unique features of the RS-422/485/530 Single-Port PCI Card is the ability to be RS-485 compatible without the need for special software or drivers.
  • Page 15 • No Echo (silk-screen “NE”) is used to control the RS-485 enable/disable functions for the receiver circuit and determine the state of the RS-422/485 driver. The RS-485 Echo is the result of connecting the receiver inputs to the transmitter outputs.

  • Page 16: Clock Modes

    CHAPTER 3: Card Setup 3.2 Clock Modes The RS-422/485/530 Single-Port PCI Card uses a unique clocking option that allows the end user to select from “divide by 4” and “divide by 1” clocking modes. SW2 positions 1 and 2 select the divide by 1 (silk-screen “D1”) and divide by 4 (silk-screen “D4”) modes.

  • Page 17: Rs-485 Mode And Clock Mode Examples (Switch Sw2)

    3.2.1 RS-485 M ODE AND LOCK XAMPLES SW2) WITCH Figure 3-1. Switch SW2, RS-422, Divide by 4. Figure 3-2. Switch SW2, RS-485 Auto Enabled, with No Echo Divide by 4. Figure 3-3. Switch SW2, RS-485 Auto Enabled, with Echo Divide by 4.

  • Page 18: Baud Rates And Divisors

    CHAPTER 3: Card Setup 3.2.2 B D1 M ATES AND IVISORS FOR Table 3-1 shows some common data rates and the rates you should choose to match them if using the PCI Card in D1 mode. Table 3-1. Baud rates for D1 mode. For this Data Rate Choose this Data Rate 1200 bps...

  • Page 19: Address And Irq Selection

    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. Switch SW1...
  • Page 20 CHAPTER 3: Card Setup allows customization of this interface to specific requirements. Each switch position corresponds to a specific portion of the interface. If multiple PCI Cards are configured in an RS-485 network, only the boards on each end should have switches T, P, and P ON. Refer to Table 3-3 for each position’s operation: Table 3-3.

  • Page 21: Installation

    Refer to the appropriate section of the Serial Utilities Software. 4.2 System Installation The RS-422/485/530 Single-Port PCI Card can be installed in any of the PCI expansion slots and contains several jumper straps for each port that must be set for proper operation.
  • Page 22 CHAPTER 4: Installation 4. Gently insert the PCI Card into the slot. Make sure that the adapter is seated properly. 5. Replace the screw. 6. Replace the cover. 7. Connect the power cord. Installation is complete.

  • Page 23: Appendix A. Troubleshooting

    RS-422/485/530 SINGLE-PORT PCI CARD Appendix A: Troubleshooting A.1 Tips Using the supplied software and following these simple steps can eliminate most common problems. 1. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports, controller cards, sound cards, etc. The I/O addresses used by these adapters, as well as the IRQ (if any) should be identified.

  • Page 24: Calling Black Box

    If none of the above steps solved the problem, please refer to Section A.2. A.2 Calling Black Box If you determine that your RS-422/485/530 Single-Port PCI Card is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts.

  • Page 25: Shipping And Packaging

    • any particular application that, when used, appears to create the problem or make it worse. A.3 Shipping and Packaging If you need to transport or ship your RS-422/485/530 Single-Port PCI Card: • Package it carefully. We recommend that you use the original container.

  • Page 26: Appendix B. Electrical Interfaces

    Differential interfaces also have greater drive capabilities that allow for longer cable lengths. RS-422 is rated up to 10 Mbps and can have cabling 4000 feet (1219.2 m) long. RS-422 also defines driver and receiver electrical characteristics that will allow one driver and up to 32 receivers on the line at once.

  • Page 27: B.2 Rs-485

    RS-485 is backwardly compatible with RS-422; however, it is optimized for partyline or multi-drop applications. The output of the RS-422/485 driver is capable of being Active (enabled) or Tri-State (disabled). This capability allows multiple ports to be connected in a multi-drop bus and selectively polled.

  • Page 28: B.3 Rs-530

    RS-485 does not define a physical connector. B.3 RS-530 RS-530 (or EIA-530) compatibility means that RS-422 signal levels are met, and the pinout for the DB25 connector is specified. The EIA (Electronic Industry Association) created the RS-530 specification to detail...

  • Page 29: Appendix C. Asynchronous Communication

    RS-422/485/530 SINGLE-PORT PCI CARD Appendix C. Asynchronous Communication Serial data communication implies that 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 Figure C-1.Asynchronous communication bit diagram. 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 RS-422/485/530 SINGLE-PORT PCI CARD transmitting and receiving ends. The communication parameters are baud rate, parity, number of data bits per character, and stop bits (that is, 9600, N, 8, 1).

  • Page 32: Appendix D. Board Layout

    APPENDIX D: Board Layout Appendix D. Board Layout 2.5" (6.3 cm) 4.9" (12.5 cm)
  • Page 33 © Copyright 2002. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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