Black Box PC↔422/485 Instructions Manual
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Black Box PC↔422/485 Instructions Manual

Black Box PC↔422/485 Instructions Manual

Serial interface
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JUNE 2000
IC030C-R2
IC170C
PC ↔ 422/485 Serial Interface
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
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
INFORMATION
Web site: www.blackbox.com • E-mail: info@blackbox.com

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Summary of Contents for Black Box PC↔422/485

  • 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 Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...

  • Page 2: Fcc And Ic Statements

    FCC AND IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION AND 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.

  • Page 3: Normas Oficiales Mexicanas (Nom) Electrical Safety Statement

    PC ↔ 422/485 SERIAL INTERFACE 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 4: Nom Statement

    NOM STATEMENT 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 aparato.

  • Page 5: Trademarks Used In This Manual

    PC ↔ 422/485 SERIAL INTERFACE TRADEMARKS USED IN THIS MANUAL AT, IBM, Micro Channel, and PS/2 are registered trademarks of International Business Machines Corporation. PC/XT is a trademark of International Business Machines Corporation. Crosstalk is a registered trademark of Digital Communications Associates, Inc.

  • Page 6: Specifications

    CHAPTER 1: Specifications 1. Specifications System IBM PC/XT, PC/AT, Portable PC, or compatible, or Requirements — PS/2 Model 25 or 30, with an available ISA half- card slot Either 238 to 23F, 278 to 27F, 2B8 to 2BF, 2F8 to Address Used —...
  • Page 7 PC ↔ 422/485 SERIAL INTERFACE Temperature Operating: 32 to 122°F (0 to 50°C); Storage: -4 to Range — 158°F (-20 to 70°C) 10 to 90% relative humidity, noncondensing Humidity Range — From PC’s ISA bus; Consumption: +5 VDC @ Power — 195 ma, ±12 VDC @ 50 ma Half card: 4.2"H x 0.7"W x 4.9"D (10.7 x 1.8 x 12.4 cm) Size —...
  • Page 8 CHAPTER 2: Introduction 2. Introduction The PC 422/485 Serial Interface is a card you can install in a PC that ↔ allows that PC to communicate with and control RS-422 or RS-485 devices. The IC030C-R2 uses a 16550 UART chip, the same chip as the one in the regular IBM asynchronous adapter (RS-232 comm port).
  • Page 9 PC ↔ 422/485 SERIAL INTERFACE RS-485 DEVICE PC-422/485 CARD RS-485 DEVICE Figure 2-2. An RS-485 multipoint application. PC-422/485 CARD RS-485 DEVICE Figure 2-3. An RS-485 two-wire half-duplex application. NOTE Echo is not disabled in 2-wire operation. Table 2-1. The Pinout of the Card’s DB25 Connector (J2) Signal Name Direction...
  • Page 10 CHAPTER 2: Introduction Typically, each end of the RS-422/485 bus must have line-terminating resistors. A 100-ohm resistor is provided across each RS-422/485 input, and a 1K-ohm pull-up/pull-down combination biases the receiver inputs. If more than two PC 422/485 Serial Interfaces are connected together in a ↔...

  • Page 11: Installation

    Power down the computer and install the adapter as described in Section 4.2. If you wish to change any resources assigned to the adapter, refer to the help file installed in the Black Box folder in the Start, Programs menu.
  • Page 12 CHAPTER 3: Installation Follow these steps to install the card (refer to Figure 3-1 below): Selects Selects IRQ3 IRQ4 COM2: COM1: ALWAYS DRIVER ENABLE = User Configurable Figure 3-1. Board layout of the PC↔422/485 Serial Interface. 1. Set DIP switch S1 on the card for your desired serial-port address (see Table 3-1 on the next page).
  • Page 13 PC ↔ 422/485 SERIAL INTERFACE E1 selects IRQ3; at position 4, IRQ4 is selected. If no IRQ is required, remove the jumper completely. If you’ve set DIP switch S1’s position 8 CLOSED to select the address COM1:, you must set this jumper to IRQ4. If you’ve set S1’s position 6 CLOSED to select the address COM2:, you must set this jumper to IRQ3.
  • Page 14 CHAPTER 3: Installation Table 3-1. Selecting the Address with DIP Switch S1 Switch Position Serial Port Address (Hexadecimal) 238 to 23F* 2B8 to 2BF* 338 to 33F* 3B8 to 3BF* 278 to 27F* 2F8 to 2FF (COM2:) 378 to 37F* 3F8 to 3FF (COM1:) *These addresses are not supported by DOS, but can be supported by special software.

  • Page 15: Troubleshooting

    PC ↔ 422/485 SERIAL INTERFACE 4. Troubleshooting 4.1 Self-Testing The PC 422/485 Serial Interface can perform a self-test to check for ↔ hardware and setup problems. To run this test, follow the steps below: 1.Install jumpers on the data pins of the card’s DB25 connector, as shown in Figure 4-1 below.
  • Page 16 CHAPTER 4: Troubleshooting 6.If the card is working properly, the characters will appear on the screen. If the characters do not appear, the card is not necessarily defective. Examine the following possibilities (refer to Chapter 3 • Check the port settings in your software and on DIP switch S1. Are S1 and your software set to use the same address? •...
  • Page 17 If your PC 422/485 Serial Interface seems to be malfunctioning, ↔ do not ; contact Black Box Technical Support at attempt to alter or repair it 724-746-5500. Before you do so, make a record of the history of the problem. Your...
  • Page 18 NOTES...
  • Page 19 NOTES...

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