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WTI RAB-14A User Manual

A/b switching system
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WTI Part No. 12057
Rev. B
RAB-14A
A/B Switching System
Preliminary Draft
February 1997
User's Guide

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Summary of Contents for WTI RAB-14A

  • Page 1 WTI Part No. 12057 Rev. B RAB-14A A/B Switching System Preliminary Draft February 1997 User's Guide...
  • Page 2 · · 5 Sterling Irvine California 92618-2517 · (949) 586-9950 Toll Free: 1-800-854-7226 · Fax: (949) 583-9514 http://www.wti.com...

  • Page 3: Table Of Contents

    Cable Connection ........3-4 3.5. Connecting Multiple RAB-14A Banks (Daisy Chaining) ..3-4 3.6.
  • Page 4 Appendices A. Interface Descriptions ........Apx-1 A.1. Control Module ........Apx-1 A.1.1.

  • Page 5: Introduction

    1. Introduction The RAB-14A is a versatile A/B switching system, designed for applications that require routing of RS232 lines between a common port and “A” and “B” ports. Modular A/B switches toggle seven RS232 pins between “A” and “B” channels. Up to fourteen RS232 lines and corresponding A/B channels can be controlled by each RAB-14A rack unit.
  • Page 6 RAB-14A User’s Guide Typographic Conventions Throughout this manual, typefaces and characters have been used to denote the following: ^ (e.g. ^A) Indicates a key combination used to invoke a command. For example, the text “^A” (Control A) indicates that the [Ctrl] key and the [A] key must be pressed simultaneously.

  • Page 7: Unit Description

    2. Unit Description The RAB-14A consists of a frame unit, one Control Module, and up to fourteen Switch Modules. 2.1. The Control Module 2.1.1. Control Module Front Panel Figure 2.1: Control Module Front Panel À Remote Indicator: Lights when Master Select Switch is set in middle position.

  • Page 8: Control Module Back Panel

    SetUp Switches: A bank of ten DIP switches used to select baud rate, parity, duplex mode, and other parameters. Ã Input Connector: For connection to previous bank when daisy chaining multiple RAB-14A units. Ä Output Connector: For connection to next bank when daisy chaining multiple RAB-14A units.

  • Page 9: Switch Modules

    Figure 2.3: Switch Module Front Panel 2.2. Switch Modules The RAB-14A can accept up to fourteen Switch Modules. Each module includes a Common jack, jacks for “A” and “B” lines, a Local A/B Switch, and a series of LED indicators.
  • Page 10 RAB-14A User’s Guide...

  • Page 11: Installation

    Bank Number (Sw1 - Sw4) SetUp Switches one through four assign an address or “Bank Number” to each RAB-14A unit. If the RAB-14A will be operated as a stand-alone unit with fourteen channels or less, the Bank Number should be “01". If several units will be daisy chained to provide more than fourteen channels, please refer to Section 3.5...

  • Page 12: Baud Rate Selection (Sw5 And Sw6)

    (Sw8) Duplex Mode Half (No Echo) Full (Echo) 3.1.5. Master / Satellite Bank Selection (Sw9) Switch nine determines whether the RAB-14A unit will function as a Master Bank or Satellite Bank. Bank Mode Satellite Master 3.1.6. Remote Switch Selection (Sw10) Used when A/B switching will be controlled by a remote master switch connected to the Control Module.

  • Page 13: Switch Module Jumpers

    Installation Figure 3.1: Switch Module Jumpers 3.2. Switch Module Jumpers Each Switch Module includes a series of jumpers as shown in Figure 3.1. These jumpers select the Switching Method, DCE/DTE configuration and other features. Each module can be configured for Gang Switch Control, Local Signal Control, or ASCII Code Control.

  • Page 14: Control Module Jumper

    Appendix A. 3.5. Connecting Multiple RAB-14A Banks (Daisy Chaining) Each RAB-14A rack unit allows control of up to fourteen Switch Modules. When your application requires more than fourteen channels, multiple units (banks) can be “daisy chained”. The first bank in the chain is designated as the “Master Bank”; all other banks are referred to as “Satellite Banks”.
  • Page 15 Installation To daisy chain multiple RAB-14A rack units, proceed as follows: 1. Select one RAB-14A unit to serve as the Master Bank. 2. Daisy Chaining: Connect all banks using the supplied 14 pin ribbon cable(s). a) Connect a cable from the Master Bank Control Module's “OUTPUT”...

  • Page 16: Quick Start / System Overview

    “bench test” to check for proper response. 1. Connect your PC COM port to the RAB-14A Command Port. If multiple units are daisy-chained, connect to the Master Bank Command Port. Refer to Appendix A for a description of the Command Port interface.

  • Page 17: Selecting Switching Methods

    4. Selecting Switching Methods The RAB-14A offers four different methods for control of A/B channel selection at each Switch Module. Although several different switching methods can be combined in a single rack unit, each Switch Module can be configured for only one switching method at a given time.

  • Page 18: Gang Switch Control

    Switch on bank four can control Switch Modules in banks four, five, and six. 1. Carefully remove the Switch Module from the RAB-14A rack and locate the jumpers as described in Figure 3.1. 2. Place Jumper J3 in the “GANG” position.

  • Page 19: Local Signal Control

    12 is low (-), channel “B” is selected. To configure a Switch Module for Local Signal Control, proceed as follows: 1. Carefully remove the Switch Module from the RAB-14A rack and locate the jumpers as described in Figure 3.1.

  • Page 20: Ascii Code Control

    ASCII command codes. To configure a Switch Module for ASCII Code Control, proceed as follows: 1. Carefully remove the Switch Module from the RAB-14A rack and locate the jumpers as described in Figure 3.1. 2. Place Jumper J3 in the “CODE” position.

  • Page 21: Operation; Ascii Code Control

    5. Operation; ASCII Code Control When the RAB-14A is configured for ASCII Code Control, the user can check switch status, test Switch Modules, and select A/B channels using simple ASCII commands issued from a connected PC or terminal. When your installation includes multiple daisy chained RAB-14A...

  • Page 22: Switching A/B Channels

    RAB-14A User’s Guide 5.2. Switching A/B Channels The ASCII switching command uses the following format: ^Abb mm p [Enter] Where: is the Bank Number (00 - 14). is the Switch Module Number (00 - 14). is the desired switch position (A or B).

  • Page 23: Display Switch Status

    ^AS [Enter]. The Status Screen shown in Figure 5.1 will be displayed. Note: Figure 5.1 shows an RAB-14A installation which includes 14 banks. If your installation is configured for less than 14 banks, status lines for additional banks will not be displayed.

  • Page 24: Test Switch Modules

    [Enter]. The Test Result Screen shown in Figure 5.1 will be displayed. Note: · Figure 5.1 shows an RAB-14A installation which includes 14 banks. If your installation includes less than 14 banks, result lines for additional banks will not be displayed.

  • Page 25: Interface Descriptions

    A. Interface Descriptions A.1. Control Module A.1.1. Command Port Figure A.1: Command Port A.1.2. Remote Switch Port Figure A.2: The Remote Switch Port Apx-1...

  • Page 26: Switch Module

    RAB-14A User’s Guide A.2. Switch Module Figure A.3: Switch Module Block Diagram Apx-2...

  • Page 27: Ports "A" And "B" (Dte)

    Appendices A.2.1. Ports “A” and “B” (DTE) Signal Note F Ground Data, Output Data, Input RTS, Output CTS, Input DSR, Input Signal Ground DCD, Input DTR, Output Remote, Input A.2.2. Common Port (DTE or DCE) Signal Note F Ground Data, Input Data, Output RTS, Input CTS, Output...
  • Page 28 RAB-14A User’s Guide jumpering J5 - 1, 2, and 3, located on the Switch Module card. Apx-4...
  • Page 29 Appendices B. Specifications Switch Card: Up to 14 Modules Interface: RJ45-3, Three Jacks, 8 Pins Switched Common Jack to A or B Jack. Contacts: High Reliability, Mechanical Relays, Break-Before- Make Contacts with 1 Amp @ 30 VDC Rating, 100 Million Cycle Life.

  • Page 30: Customer Service

    RAB-14A User’s Guide C. Customer Service Customer Service hours are from 8:00 AM to 5:00 PM, PST, Monday through Friday. When calling, please be prepared to give the name and make of the unit, its serial number and a description of its symptoms.
  • Page 31 Appendices Trademark and Copyright Information WTI and Western Telematic are trademarks of Western Telematic Inc.. All other product names mentioned in this publication are trademarks or registered trademarks of their respective companies. Information and descriptions contained herein are the property of Western Telematic Inc..

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