Black Box SHM-NPR User Manual
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Black Box SHM-NPR User Manual

Black Box SHM-NPR User Manual

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SHM-NPR and SHM-NPR/RJ
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
JUNE 2000
ME721A-M-R3
ME721A-F-R3
ME821A-M-R4
ME821A-F-R4

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Summary of Contents for Black Box SHM-NPR

  • 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 FCC/IC STATEMENTS 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 such interference when the equipment is...
  • Page 3 SHM-NPR 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 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 5: Table Of Contents

    3.2 The Installation Procedure ..............9 4. Troubleshooting ..................12 4.1 If You Have Difficulty ................ 12 4.2 Calling Black Box ................12 4.3 Shipping and Packaging ..............13 Appendix A: RS-232 Pinout ................14 Appendix B: Maximum Distances ..............15...

  • Page 6: Specifications

    CHAPTER 1: Specifications 1. Specifications Cable Required — 4-wire unloaded twisted pair with DC continuity (not included) Compliance — FCC Class A, IC Class/classe A Interfaces — Device side: Serial EIA RS-232-C, DTE or DCE (user-selectable, default DCE); Line side: Proprietary balanced 4-wire Protocol —...
  • Page 7 From Pins 3, 5, 6, 8, and/or 9 if the attached device is DCE CAUTION! When the device to which a SHM-NPR is attached is powered down, that SHM-NPR also loses power and can no longer send any signals to the remote SHM- NPR.

  • Page 8: Introduction

    (four wires). They require no AC power or batteries, but can support distances up to 17 miles (27.3 km; see Appendix B). The SHM-NPR and SHM-NPR/RJ have an external DCE/DTE switch, so you can connect them to any type of RS-232 device without opening their chassis. And you...
  • Page 9 SHM-NPR Typical applications for these units are shown—not to scale, obviously—in Figures 2-2 and 2-3. In Figure 2-2, short-haul modems are being used to connect an async host computer to a faraway terminal. (The thing to remember about such applications is that if the computer and terminal are too widely separated, the host will time out before receiving it receives the terminal’s responses.) In Figure 2-3,...

  • Page 10: Configuration And Installation

    EDN25C, for example—that carries all of the pins from which the SHM-NPR draws power; just make sure to keep this cable as short as possible.) No power is required from a dedicated AC or DC source, because the unit is powered entirely by the attached device’s control and data signals.
  • Page 11 SHM-NPR To install a pair of these units, take these steps: 1A. SHM-NPR (ME721 models) only: Making sure that they are not connected to any other device or any power source, gently pry the units open using a small screwdriver or similar tool wedged into one of the indentations on either side of the units’...
  • Page 12 CHAPTER 3: Configuration and Installation 1B. SHM-NPR/RJ (ME821 models) only: Get 4-wire twisted-pair cable and terminate it with RJ-11 or (especially if the cable is shielded) RJ-12 plugs, using the pin assignments shown in Figure 3-3 (for RJ-11 cable, substitute Pins 1, 2, 3, and 4 for Pins 2, 3, 4, and 5 respectively) and end-to-end wiring like that shown in Figure 3-2 on the previous page.

  • Page 13: Troubleshooting

    2. Check all external connections. Make sure they are firm and secure. 3. SHM-NPR (ME721) only: Detach the unit from the device and open its case. Make sure that none of the wires have come loose from the terminal block.

  • Page 14: Shipping And Packaging

    CHAPTER 4: Troubleshooting 4.3 Shipping and Packaging If you need to transport or ship your SHM-NPR or SHM-NPR/RJ: • Package it carefully. We recommend that you use the original container. • If you are returning the unit, make sure you include everything your received with it.

  • Page 15: Appendix A: Rs-232 Pinout

    SHM-NPR Appendix A: RS-232 Pinout The table below shows how the RS-232-C ports of the SHM-NPR and SHM-NPR/RJ are pinned out. Please note that even though the control and voltage signals are listed, they are used only to help power the units; only the data signals are carried across the line.

  • Page 16: Appendix B: Maximum Distances

    APPENDIX B: Maximum Distances Appendix B: Maximum Distances The table below shows how far pairs of SHM-NPRs and SHM-NPR/RJs can transmit data to each other at specified cable thicknesses and data rates. Please note that these measurements are for noiseless environments with not more than 20% of peak-to-peak distortion;...
  • Page 17 NOTES...
  • Page 18 ©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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Shm-npr/rj

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