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Black Box ME500A Manual

Black Box ME500A Manual

Async/sync industrial line driver
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Async/Sync Industrial Line Driver
CUSTOMER
SUPPORT
INFORMATION
R X
T X
P R W
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
r T e
E r r o
C D
R T S
SEPTEMBER 1999
c
S y n
↔
i v e r
e D r
n c
A s y
l L i n
s t r i a
I n d u
5 1 1
s t
5 1 1 E
ME500A
o t e
R e m
a l
N o r m
l
L o c a

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  • Page 1 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) SUPPORT FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION 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 TRADEMARKS USED IN THIS MANUAL AT&T is a registered trademark of American Telephone and Telegraph Company. Any other trademarks used in this manual are acknowledged to be the property of the trademark owners.
  • Page 3 ASYNC/SYNC INDUSTRIAL LINE DRIVER 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.
  • Page 4 NOM STATEMENT 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 ASYNC/SYNC INDUSTRIAL LINE DRIVER 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.

  • Page 6: Table Of Contents

    CONTENTS Contents Chapter Page 1. Specifications ......................6 2. Introduction ......................7 Description ....................7 Features ......................7 3. Configuration ......................8 Configuration Switches ................8 Configuration Switch Set S1 ................9 Configuration Switch Set S2 ..............11 Configuration Switch Set S3 ..............13 4. Installation ......................16 Two-Wire Installation ..................16 4.1.1 Two-Wire Cable Connection via RJ-45 ..........17 Four-Wire Installation ................18 4.2.1 Four-Wire Cable Connection via RJ-45 ..........18...

  • Page 7: Specifications

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 1. Specifications Synchronous or asynchronous, 2-wire/half duplex or Transmission Format — 4-wire/full or half duplex Interface — RS-232 (CCITT V.24) connection via DB25 female; Twisted-pair connection via RJ-45 Transmission Line — 2- or 4-wire UTP, 19 to 26 AWG Data Rates —...

  • Page 8: Introduction

    CHAPTER 2: Introduction 2. Introduction 2.1 Description The Async/Sync Industrial Line Driver operates 2-wire (half duplex) or 4-wire (full or half duplex), in synchronous or asynchronous modes, over unconditioned telephone lines. The Line Driver supports data rates up to 64 kbps. It operates in synchronous mode between the local and remote modems;...

  • Page 9: Configuration

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 3. Configuration 3.1 Configuration Switches The Async/Sync Industrial Line Driver uses 24 external mini DIP switches that allow configuration to an extremely wide range of applications. These 24 DIP switches are grouped into three eight-switch sets, and are externally accessible from the underside of the unit (see Figure 3-1).

  • Page 10: Configuration Switch Set S1

    CHAPTER 3: Configuration Figure 3-2. Close-up of DIP switches showing ON and OFF positions. 3.2 Configuration Switch Set S1 The DIP switches on S1 set data rate, clock source, async/sync mode, and carrier- control method. The default settings are shown in the table below. Table 3-1.
  • Page 11 ASYNC/SYNC INDUSTRIAL LINE DRIVER Switches S1-1 through S1-4 and S3-3: Data-Rate Setting Switches S1-1 through S1-4 and S3-3 are set in combination to determine the asynchronous and synchronous data rate for the Async/Sync Industrial Line Driver. Table 3-2. Data-Rate Settings S1-1 S1-2 S1-3...

  • Page 12: Configuration Switch Set S2

    CHAPTER 3: Configuration Switch S1-7: Asynchronous/Synchronous Mode The setting for switch S1-7 determines whether the Async/Sync Industrial Line Driver is in asynchronous or synchronous operating mode. S1-7 Setting Asynchronous Synchronous Switch S1-8: Carrier-Control Method The setting for switch S1-8 determines whether the carrier is Constantly On or Controlled by RTS.
  • Page 13 ASYNC/SYNC INDUSTRIAL LINE DRIVER Switches S2-1 and S2-2: Word Length Switches S2-1 and S2-2 are set in combination to determine the word length for asynchronous data, including the start and stop bits. S2-1 S2-2 Setting 8 bits 9 bits 10 bits 11 bits Switch S2-3: Extended Signaling Rate The setting for switch S2-3 determines the range of variability the Async/Sync...

  • Page 14: Configuration Switch Set S3

    CHAPTER 3: Configuration Switch S2-8: V.54 Loopback Test Enable This switch enables or disables V.54 looping in the Async/Sync Industrial Line Driver. S2-8 Setting V.54 Normal Operation Enabled V.54 Testing Disabled 3.4 Configuration Switch Set S3 The DIP switches on S3 set the anti-stream control, timing mode, topology, local loopback enable, remote loopback enable, and input impedance levels for the Async/Sync Industrial Line Driver.
  • Page 15 ASYNC/SYNC INDUSTRIAL LINE DRIVER Switches S3-1 and S3-2: Input Impedance The setting for Switches S3-1 and S3-2 determines the Line Driver’s input impedance. This allows you to choose the optimum impedance setting for your application. In long-distance applications, the impedance of the cable must match the impedance of the load (or resistor) of the Async/Sync Industrial Line Driver.
  • Page 16 CHAPTER 3: Configuration Switch S3-4: Topology Use switch S3-4 to select the topology of the Async/Sync Industrial Line Driver. S3-4 Setting Point-to-point Master multipoint Slave multipoint Switch S3-5: RS-232 Initiation of Local Loopback Test The setting for switch S3-5 determines whether or not the Async/Sync Industrial Line Driver local analog loopback test can be initiated by raising pin 18 on the RS-232 interface.

  • Page 17: Installation

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 4. Installation The Async/Sync Industrial Line Driver operates in four twisted-pair topologies: 2-wire/point-to-point, 2-wire/multipoint, 4-wire/point-to-point, and 4-wire/ multipoint. In each of these topologies, the twisted-pair wire must be 19 to 26 AWG dry, unconditioned metallic wire (see the Appendix for wire recommendations). Dial-up analog circuits, such as those used with a standard Hayes-type modem, are not acceptable.

  • Page 18: Two-Wire Cable Connection Via Rj-45

    CHAPTER 4: Installation 4.1.1 T RJ-45 ABLE ONNECTION The RJ-45 jack on an Async/Sync Industrial Line Driver is prewired for a standard telco wiring environment. To be sure you have the right wiring, use the table below as a guide. RJ-45 Signal 1 ....NC...

  • Page 19: Four-Wire Installation

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 4.2 Four-Wire Installation When communicating over a two-twisted-pair circuit, the Async/Sync Industrial Line Driver can operate full or half duplex, point-to-point or multipoint. In two- pair point-to-point applications, you’ll need a pair of Line Drivers for each circuit (one at each end of the two-pair cable).

  • Page 20: Four-Wire, Multipoint Installation

    CHAPTER 4: Installation AT&T standard modular color codes are: 1 - Blue 2 - Orange 3 - Black 4 - Red 5 - Green 6 - Yellow 7 - Brown 8 - Slate 4.3 Four-Wire, Multipoint Installation Multipoint operation involves the connection of several terminals to one host port. In such an application, one local Async/Sync Industrial Line Driver is used as a master unit, and it is connected to several remote Async/Sync Industrial Line Drivers that are acting as slaves.

  • Page 21: Multipoint Twisted-Pair Connection

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 4.3.1 M ULTIPOINT WISTED ONNECTION The Async/Sync Industrial Line Driver supports multipoint applications using a star topology. Maximum distance between the Line Drivers will vary based on the number of drops, data rate, wire gauge, etc. Call Technical Support for specific distance estimates.

  • Page 22: Operation

    CHAPTER 5: Operation 5. Operation Once you’ve configured each Async/Sync Industrial Line Driver and connected the twisted-pair and RS-232 cables (see Chapter 4), you’re ready to operate the Line Drivers. 5.1 LED Status Monitors The Async/Sync Industrial Line Driver has seven front-panel status LEDs that indicate the condition of the Line Driver and communication link.

  • Page 23: The Test Indicator

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 5.1.3 T NDICATOR The yellow Test LED indicates that V.52 or V.54 tests are running. 5.1.4 T RROR NDICATORS The Error indicator LED has two functions: • When the Async/Sync Industrial Line Driver is in test mode (green Test LED is lit), the Error LED glows red when bit errors occur.

  • Page 24: Test Modes

    CHAPTER 5: Operation 5.4 V.54 Test Modes The Async/Sync Industrial Line Driver offers two V.54 test modes to evaluate the condition of the modems and the communication link. These tests can be activated physically from the front panel or via the RS-232 interface. NOTE V.54 test modes are available for point-to-point applications only.

  • Page 25: Remote Digital Loopback (Rdl)

    ASYNC/SYNC INDUSTRIAL LINE DRIVER 5.4.2 R (RDL) EMOTE IGITAL OOPBACK The Remote Digital Loopback (RDL) test checks the performance of both the local and remote Line Drivers and the communication link between them. In this test mode, any characters sent to the remote Async/Sync Industrial Line Driver will be returned back to the originating device.

  • Page 26: Power-Down

    CHAPTER 5: Operation 5.5 Power-Down To turn off the Async/Sync Industrial Line Driver, simply unplug the AC power cord from the wall. There is no power switch.

  • Page 27: Appendix. Cable Recommendations

    ASYNC/SYNC INDUSTRIAL LINE DRIVER Appendix. Cable Recommendations This Line Driver was tested on twisted-pair cable with these characteristics: Wire Gauge Capacitance Resistance 19 AWG (0.9 mm) 83 nF/mi. or 15.72 pF/ft. 0.0163 ohms/ft. 22 AWG (0.6 mm) 83 nF/mi. or 15.72 pF/ft. 0.0326 ohms/ft.
  • Page 28 APPENDIX: Cable Recommendations Wire with capacitance of 20 pF/ft. or less is suitable; however, distances may vary. Resistance will also affect distance but not functionality. Wire should be 26 AWG (0.4 mm) or larger (smaller AWG#). This Line Driver is designed to withstand normal environmental noise and conditions;...
  • Page 29 © Copyright 1999. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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