Black Box IC050C User Manual
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Black Box IC050C User Manual

Black Box IC050C User Manual

Rs422/485 serial interface plus
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RS422/485 Serial Interface Plus
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
CUSTOMER
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
SUPPORT
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
INFORMATION
MARCH 2000
IC050C
IC171C

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Summary of Contents for Black Box IC050C

  • Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX CUSTOMER FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 SUPPORT Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com INFORMATION...
  • Page 2 RS422/485 SERIAL INTERFACE PLUS 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 and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against...
  • Page 3 RS422/485 SERIAL INTERFACE PLUS 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 RS422/485 SERIAL INTERFACE PLUS 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. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.

  • Page 5: Table Of Contents

    RS422/485 SERIAL INTERFACE PLUS Contents Chapter Page 1. Specifications....................1 2. Introduction .....................2 2.1 Overview....................2 2.2 What’s Included..................2 2.3 Features ....................3 2.4 Technical Description ................3 3. Address Selection .....................6 4. Option Selection ....................8 5. Installation......................15 5.1 Software Installation ................15 5.1.1 Windows 3.1x................15 5.1.2 Windows 95/98 ................15 5.1.3 Windows 98..................15 5.2 Hardware Installation ................15...

  • Page 6: Specifications

    CHAPTER 1: Specifications 1. Specifications Number of Ports — Single RS-485/422 Speed — IC050C: 115.2 Kbps; IC171C: 460.8 kbps and higher RS-485 Operation — 2- or 4-wire Connectors — DB25P Maximum Distance — Up to 5000 ft. (1524 m) Communications Chip — IC050C: 16550 UART; IC171C: 16950 UART MTBF —...

  • Page 7: Introduction

    READ.ME|MORE [ENTER]. 2.2 What’s Included Your Serial Interface Plus should come with the following items. If any of these items are missing or damaged, contact Black Box. (1) RS422/485 Serial Interface Plus card (2) 3.5" serial utility diskettes This manual...

  • Page 8: Features

    CHAPTER 2: Introduction 2.3 Features Listed below are the special features your Serial Interface Plus offers. • Single-channel RS-485/422 adapter for Windows, OS/2, Windows NT, and DOS communications. • Addressable as COM1: through COM4: or twelve other pre-selected address options. •...
  • Page 9 RS422/485 SERIAL INTERFACE PLUS RS-530 and RS-449 RS-530 and RS-449 (EIA-530 and EIA-449) are similar to RS-422 and RS-485 in the fact that they are differential interfaces, but these two standards provide a specified pin-out that defines a full set of modem control signals that can be used for regulating flow control and line status.
  • Page 10 CHAPTER 2: Introduction This interface is ideal for multi-drop or network environments. The RS-485 tri-state driver (not dual-state) will allow the electrical presence of the driver to be removed from the line. The driver is in a tri-state or high-impedance condition when not active.

  • Page 11: Address Selection

    Be careful when selecting the port address, since some selections conflict with existing PC ports. The following table shows the addressing options available with the standard PAL. If you don’t see an address option that suits your needs, call Black Box about a custom PAL option. Port 1...
  • Page 12 CHAPTER 3: Address Selection Figure 3-1. DIP Switch SW1. Address 3F8 Hex.

  • Page 13: Option Selection

    RS422/485 SERIAL INTERFACE PLUS 4. Option Selection NOTE Be sure to set the address selections and jumper options before installation. The RS422/485 Serial Interface Plus contains several jumpers that must be set for proper operation. E1: This header selects the interrupt request for the RS422/485 Serial Interface Plus.
  • Page 14 CHAPTER 4: Option Selection 12 15 Figure 4-2. Header E1 Optional Windows 3.1 Configuration. IRQ 10 selected. (Refer to Chapter 6 for more information.) NOTE IRQ 2 on AT class machines is not available. IRQ 9 is substituted in place of IRQ 2.
  • Page 15 RS422/485 SERIAL INTERFACE PLUS Figure 4-4. Header E2 in Shared Mode. Header E5 is used to control the RS-485 enable/disable functions for the driver circuit. One of the unique features of the RS422/485 Serial Interface Plus is its ability to be RS-485 compatible without the need for special software or drivers.
  • Page 16 CHAPTER 4: Option Selection Header E3 is used to control the RS-485 enable/disable functions for the receiver circuit. The RS-485 “Echo” is the result of connecting the board’s receiver inputs to the transmitter outputs. Every time a character is transmitted it is also received by the board. This can be beneficial if your software can handle it (using received characters to throttle the transmitter), or it can confuse your system if your software cannot handle it.
  • Page 17 RS422/485 SERIAL INTERFACE PLUS DIP shunt E4 selects the pin out for the DB25 connector P3. With the 5-position shunt in the EIA-530 mode, the RS422/485 Serial Interface Plus complies with the EIA-530 pinout with the following signals supported: Signal Name Pin # Mode...
  • Page 18 CHAPTER 4: Option Selection Signal Name Pin # Mode Ground Transmit Positive Output RS-422 Transmit Negative Output RS-422 Receive Positive Input RS-422 Receive Negative Input RS-422 RS-530/422/485 Line Termination Typically, each end of the RS-530/422/485 bus must have line-terminating resistors. A 100-ohm resistor is across each RS-530/422/485 input, in addition to a 1K ohm pull-up/pull-down combination that biases the receiver inputs.
  • Page 19 RS422/485 SERIAL INTERFACE PLUS Figure 4-11. DIP Switch SW2.

  • Page 20: Installation

    Power down the computer and install the adapter as described in Section 5.2. 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 21: Windows 3.1 Installation

    RS422/485 SERIAL INTERFACE PLUS NOTE Be sure to set the address selections and jumper options before installation. 1. Turn off PC power. Disconnect the power cord. 2. Remove the PC case cover. 3. Locate an available slot and remove the blank metal slot cover. 4.
  • Page 22 CHAPTER 6: Windows 3.1 Configuration 6. Windows 3.1 Configuration To configure the RS422/485 Serial Interface Plus under Windows 3.1, open the “Control Panel,” which is typically found in the “Main” Program Group. Next, open the “Ports” selection under the Control Panel. Control Panel Settings Help...
  • Page 23 RS422/485 SERIAL INTERFACE PLUS The next step is to select the appropriate Baud Rate, Data Bits, Parity, Stop Bits, and Flow Control. Settings for COM3: Baud Rate: 19200 Data Bits: Cancel Parity: None Advanced Stop Bits: Help Flow Control: None If you wish to select an IRQ or address different from the default, click on the “Advanced”...
  • Page 24 CHAPTER 6: Windows 3.1 Configuration Select “OK” for all windows after you have made your selection. The following message should appear: System Setting Change Your COM Port settings have changed: You will need to quit and restart Windows so that the new setting(s) can take effect.

  • Page 25: Troubleshooting

    RS422/485 SERIAL INTERFACE PLUS 7. Troubleshooting Computer does not recognize any COM ports, or the system is “dead” or non-responsive. How to identify the problem: Use the SSD.COM Program (found on your utility diskette). Solution: Identify all COM ports installed on you computer and address the RS422/485 Serial Interface Plus at a different address from those already present.
  • Page 26 CHAPTER 7: Troubleshooting When using Windows 3.1, only two ports at any time are functional. How to identify the problem: Verify that all ports have a separate interrupt, or if sharing interrupts, only one device is using the IRQ at a time. Solution: Change the IRQs so that each port has its own unique interrupt (the preferred setting) or close each port before trying to open the next.
  • Page 27 RS422/485 SERIAL INTERFACE PLUS The RS422/485 Serial Interface Plus is setup to use the AT interrupts, but there’s no interrupt response. How to identify the problem: Verify that the interrupt jumpers are correctly set. Verify that the card is inserted into a 16-bit or AT slot. Solution: Use the program SLT (found on your utility diskette) to verify that the interrupts are set correctly.
  • Page 28 If you determine that your RS422/485 Serial Interface Plus is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box Technical Support at 724-746-5500. Before you do, make a record of the history of the problem. We will be able...

  • Page 29: Appendix: Circuit-Board Design

    RS422/485 SERIAL INTERFACE PLUS Appendix: Circuit-Board Design...
  • Page 30 © Copyright 2000. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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Ic171c

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