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Black Box IC478A-M-R2 manual

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Table of contents for the manual

  • Page 1

    CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX 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 Web site: www.blackbox.com • E-mail: info@blackbox.com FEBRUARY [...]

  • Page 2

    1 ASYNC 2 3 2 ↔ 422/485 CONVERTER FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications. L[...]

  • Page 3

    2 ASYNC 232 ↔ 422/485 CONVERTER NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD .[...]

  • Page 4

    3 ASYNC 2 3 2 ↔ 422/485 CONVERTER[...]

  • Page 5

    4 ASYNC 232 ↔ 422/485 CONVERTER Contents[...]

  • Page 6

    5 Data Rate Connectors Transmission Format Transmission Line Transmission Mode Range Control Signals Carrier Surge Protection RTS/CTS Delay MTBF Operating Temperature CHAPTER 1: Specifications 1. Specifications[...]

  • Page 7

    6 ASYNC 232 ↔ 422/485 CONVERTER Humidity Altitude Power Size Shipping Weight[...]

  • Page 8

    7 CHAPTER 2: Introduction ↔ Section 4.4 2. Introduction[...]

  • Page 9

    8 ASYNC 232 ↔ 422/485 CONVERTER ↔ DCE DTE +RCV -G-XMT+ 3. Configuration DTE/DCE Switch Terminal Block[...]

  • Page 10

    9 3.1 Setting the DTE/DCE Switch ON 1 2 3 4 5 6 7 8 CHAPTER 3: Configuration DIP Switch S1[...]

  • Page 11

    10 ASYNC 232 ↔ 422/485 CONVERTER 3.2 DIP-Switch Configuration internally ON OFF ON 1 2 3 4 5 6 7 8[...]

  • Page 12

    11 CHAPTER 3: Configuration 3.2.1 DIP-S WITCH S ETTINGS Switch S1 Summary Table Position Function Factory Default S1-1* “Transmit Off” Impedance Off High Z S1-2* “Transmit Off” Impedance Off S1-3 RTS/CTS Delay On 8 msec. S1-4 Echo Mode Off Echo Off S1-5 Carrier Control On Controlled by RTS S1-6 Receive Impedance On 120 ohm S1-7* 2 wire/4 wi[...]

  • Page 13

    12 ASYNC 232 ↔ 422/485 CONVERTER S1-4: Echo Mode S1-5: Carrier-Control Method NOTE Carrier is ON when RTS is asserted positive, and OFF only when RTS is driven to a negative voltage. S1-6: Receive Impedance (Termination) S1-7 and S1-8: 2-wire/4-wire Modes[...]

  • Page 14

    13 CHAPTER 3: Configuration 3.2.2 C ONFIGURATION S WITCH A PPLICATIONS Do not change switch settings until you have carefully read this manual. Typical Switch Applications Switch Settings Point-to-Point Multipoint 4W 4W HDX 2W 4W 2W “Xmt Off” Imp. (S1-1) Off Off Off Off Off “Xmt Off” Imp. (S1-2) Off Off Off Off Off RTS/CTS Delay (S1-3) On O[...]

  • Page 15

    14 ASYNC 232 ↔ 422/485 CONVERTER 4.1 Connection to the RS-485 Interface must 4.1.1 4-W IRE C ONNECTION U SING THE DB25 (IC477A-X-R2 AND IC478A-X-R2) Converter RS-485 (530) Device Signal DB25 Pin DB25 Pin Signal XMTA 2......................................3 RCVA XMTB 14....................................16 RCVB RCVA 3.............................[...]

  • Page 16

    15 CHAPTER 4: Installation 2) It is not necessary that the RS-485 device adhere to the RS-530 standard. However, you must make sure that the signals, polarities, and pairing of your connection conform to this table. 3) If you are not using two IC477A-X-R2s or IC478A-X-R2s back to back and the procedure on the previous page produces garbage data (or[...]

  • Page 17

    16 ASYNC 232 ↔ 422/485 CONVERTER 5. the other pair of wires NOTE Positive and negative are relative terms and may not always have the same relationship for all RS-422 or RS-485 devices (see the previous note regarding “flipping the leads”). Converter RS-485 Device XMT+ ............................................................RCVA XMT- ....[...]

  • Page 18

    17 8. 9. +RCV -G-XMT+ +RCV -G-XMT+ +RCV -G-XMT+ CHAPTER 4: Installation[...]

  • Page 19

    18 ASYNC 232 ↔ 422/485 CONVERTER 10. 11. 4.1.3 2-W IRE C ONNECTION only the transmit (XMT) pair Converter Signal RS-485 Signal XMT+ ..................................+ (positive) XMT-...................................- (negative) IMPORTANT! If you are not using two IC476A-X-R2s back to back and the procedure on the previous page produces garbage[...]

  • Page 20

    19 CHAPTER 4: Installation 4.2 Connection to the RS-232 Interface NOTE If you must use a cable to connect the Converter to the RS-232 device, make sure it is a straight-through cable of the shortest possible length. We recommend no more than 6 ft. (1.8 m). 4.3 Wiring for Multipoint Applications NOTE Connections are to screw terminals directly on th[...]

  • Page 21

    20 ASYNC 232 ↔ 422/485 CONVERTER 4.4 Operation data[...]

  • Page 22

    21 APPENDIX A: RS-232C Pin Configurations ST ANDARD “DTE” SETTING DIRECTION DIRECTION From Converter Data T erm. Ready (DTR) - 20 1- (FG) Frame Ground 2- (TD) T ransmit Data 3- RD) Receive Data 4- (RTS) Request to Send 5- (CTS) Clear to Send 6- (DSR) Data Set Ready 7- (SG) Signal Ground 8- (DCD) Data Carrier Detect From Converter T o Converter [...]

  • Page 23

    22 ASYNC 232 ↔ 422/485 CONVERTER Pin Number Pin Name Appendix B . 422/485 (530) Pin Configuration[...]

  • Page 24

    23 APPENDIX C: Self-Test Section 3.2.2 Appendix C. Self- T est[...]

  • Page 25

    1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 1998. Black Box Corporation. All rights reserved.[...]