Black Box SHM-NPR/RJ-45 Series Manual
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Black Box SHM-NPR/RJ-45 Series Manual

Short-haul modems
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JUNE 2000
ME822A-F
ME822A-M
Short-Haul Modems, NPR/RJ-45
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/RJ-45 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: Trademarks Used In This Manual

    SHM NPR/RJ-45 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 3: Federal Communications Commission

    SHM NPR/RJ-45 FEDERAL COMMUNICATIONS COMMISSION CANADIAN DEPARTMENT OF COMMUNICATIONS 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...

  • Page 4: Instrucciones De Seguridad

    SHM NPR/RJ-45 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 5 SHM NPR/RJ-45 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 6: Specifications

    SHM NPR/RJ-45 1. Specifications Data Rates — 19,200 bps (according to the RS-232 interface Transmission Format — Asynchronous Transmission Mode — Full duplex Cable Type — 4-wire, unloaded, customer-owned twisted-pair cable with DC continuity Connectors — RS-232: DB25 (male for ME822A-M, female for ME822A-F);...
  • Page 7 SHM NPR/RJ-45 • DTE configuration of the SHM when connected to a DCE: The + and - voltage is taken from pin 3, 5, 6, 8, or 9. NOTE When power is removed from the DCE or DTE to which the SHM is connected, the SHM can no longer send a signal to the remote receiver.
  • Page 8 SHM NPR/RJ-45 2. Description The Short-Haul Modem NPR/RJ-45 uses the latest surface-mount technology to attain high-quality short- range modem performance in a low-profile package. The SHM operates at full duplex at data rates up to 19.2 Kbps over 2 twisted pair. Requiring no AC power or batteries, the SHM supports distances up to 17 miles (27.4 km).
  • Page 9 SHM NPR/RJ-45 The SHM has the option of being configured as either DCE or DTE devices. Set the switch located on the top of the printed circuit board to the DCE or DTE position. NOTE You don’t have to open the plastic case to change the switch setting.
  • Page 10 SHM NPR/RJ-45 RS-232 Connection (male or female) DCE/DTE Switch Figure 2-2. The SHM’s Components.

  • Page 11: Installation

    SHM NPR/RJ-45 3. Installation The SHM plugs directly into the back of a terminal or computer. This eliminates the need for an RS-232C data cable. No power is required from an external source because the unit is powered entirely by the terminal or computer’s control and data signals.
  • Page 12 SHM NPR/RJ-45 FEMALE MALE 3 (RXB) - PINS 4 (TXB) + 1 2 3 4 5 6 7 8 5 (TXA) - 6 (RXA) + Figure 3-1. Pin Assignments for RJ-45 Connectors. 3. If the SHM is to be used as a DTE, set the externally accessible DCE/DTE switch to the DTE position.
  • Page 13 SHM NPR/RJ-45 SHM NPR/RJ-45s Customer-Owned Unloaded Twisted- Pair Cable Async MiniComputer Async Terminal SHM NPR/RJ-45s Customer-Owned Serial Printer Unloaded Twisted- Pair Cable Figure 3-3. Typical Short-Range Modem Applications.
  • Page 14 SHM NPR/RJ-45 Appendix: RS-232 Signals Circuit Description Signal Type Direction Protective Ground Ground Transmitted Data Data To DCE Receive Data Data From DCE Request to Send Control To DCE Clear to Send Control From DCE Data Set Ready Control From DCE Signal Ground Ground Data Carrier Detect...
  • Page 15 © 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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