Black Box SHM-NPR Plus Series Manual
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Black Box SHM-NPR Plus Series Manual

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MAY 1997
ME739A-F-R2
ME739A-M-R2
SHM-NPR Plus
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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Summary of Contents for Black Box SHM-NPR Plus Series

  • 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: Federal Communications Commission

    FCC STATEMENT 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 B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference...

  • Page 3: Instrucciones De Seguridad

    SHM-NPR 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: Nom Statement

    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: Trademarks Used In This Manual

    SHM-NPR PLUS TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 6: Specifications

    CHAPTER 1: Specifications 1. Specifications Interface — EIA RS-232/CCITT V.24, DCE Protocol — Asynchronous Data Format — Transparent to data format Operation — 2-wire full-duplex Data Rate — Up to 19,200 bps Maximum Distance (Transmission Range) — See chart on next page Transmission Line —...
  • Page 7 SHM-NPR PLUS Connectors — DTE side: Side-mounted DB25 male (ME739A-M-R2) or female (ME739A-F-R2); Line side: Internal 3-screw terminal block (for one ground wire and two data wires) with cable-strain relief Temperature Tolerance — 32 to 122°F (0 to 50°C) Humidity Tolerance — Up to 95% noncondensing Enclosure —...
  • Page 8 CHAPTER 2: Introduction 2. Introduction The SHM-NPR Plus (Short-Haul Modem [Nonpowered] Plus) is intended to be used for local data distribution: Two of them carry asynchronous communication between computers and terminals. The SHM-NPR Plus operates full-duplex over two twisted pairs or a single coax line. Figure 2-1 below shows a typical application.
  • Page 9 SHM-NPR PLUS to the remote DTE. In this way, one control signal can be passed end-to-end across the link. (DCD is always on regardless of how transmit carrier is strapped.) The SHM-NPR Plus operates without a power-supply transformer. To operate properly, it must at least be connected to a DTE’s Transmit Data (TD, Pin 2), Receive Data (RD, Pin 3), and Signal Ground (SGND, Pin 7) lines.

  • Page 10: Installation

    CHAPTER 3: Installation 3. Installation To install the SHM-NPR Plus, take these steps: 1. Separate the two halves of the unit’s plastic cover by pressing the marked areas on the sides of the cover. (Start at the cable end.) 2. For a coax connection: Connect the coax cable’s shielding and center wire to the pair of connectors marked LINE on the SHM-NPR Plus’s screw-terminal block.
  • Page 11 SHM-NPR PLUS 3. Referring to Figure 3-1 below, set the Driver’s transmit-carrier strap (jumper) to suit your application: ON for carrier constantly on, CNTR for carrier controlled by RTS. 4. Press the two halves of the cover back together. 5. Plug the SHM-NPR Plus directly into the DTE’s RS-232 serial port.

  • Page 12: Troubleshooting

    4. Troubleshooting 4.1 Calling Black Box If your SHM-NPR Plus seems to be malfunctioning, do not attempt to alter or repair the unit. Call Black Box Technical Support at 724-746-5500; the problem might be solvable over the phone. Before you call, make a record of the history of the problem.
  • Page 13 © Copyright 1997. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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Me739a-f-r2Me739a-m-r2

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