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D. Customer Service

Customer Service hours are 8:00 AM to 5:00 PM, Pacific Time, 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. If the unit should need to be returned for factory repair it must be
accompanied by a Return Authorization number from Customer Service.

WTI Customer Service

5 Sterling

Irvine, California 92618

949-586-9950

Toll Free: 1-800-854-7226

Fax: 949-457-8138

e-mail: [email protected]

Trademark and Copyright Information

WTI and Western Telematic are trademarks of Western Telematic Incorporated. 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..
Such information and descriptions may not be copied, disseminated or distributed without the
express written consent of Western Telematic, Inc..

© Copyright Western Telematic Inc., 1997, 2000
All rights reserved.

June 2000
September 1997
Part Number: 12365 Revision: C

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CAS-81 Code Activated Switch

Appendices

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Summary of Contents for CAS-81

Page 1: ...WTI Part Number 12365 Rev C CAS 81 8 Port Code Activated Switch User s Guide 5 Sterling Irvine California 92618 949 586 9950 Toll Free 1 800 854 7226 Fax 949 583 9514 http www wti com ...

Page 2: ...nnect De vices to Se rial Ports 3 3 3 4 Connect Control Port 3 3 3 5 RS422 Line Driver Option 3 3 4 Operation 4 1 4 1 Power Up 4 1 4 2 ASCII Characters 4 1 4 3 Com mand String 4 1 4 4 CommandResponse 4 2 4 5 Port Gating 4 2 4 5 1 Open Port Gating 4 2 4 5 2 Close Port Gating 4 2 Appendices A Description of System Interfaces Apx 1 A 1 Control Port DB25 Female Apx 1 A 2 Se rial Ports 1 through 8 DB9 ...

Page 3: ...l Ports simultaneously The broadcast mode may be selected by code or permanently selected by the Select Switch An Auto connect feature allows the Control Port to automatically connect to Serial Port 1 each time the unit is powered up or after a timeout or disconnect This provides a data path to a critical device in case of a power failure or convenient connection to commonly used equipment Each Se...

Page 4: ... Port pin 4 Å CTS Indicates that the Clear to Send signal is present at Control Port pin 5 Also indicates that the Clear to Send signal is present at pin 8 of a connected Serial Port Always high when all ports are disconnected Æ DTR Indicates that the Data Terminal Ready signal is present at Control Port pin 20 Ç DCD Indicates that the Data Carrier Detect signal is present at Control Port pin 8 Al...

Page 5: ...B25 female connector configured for DCE Accepts a standard PC to Modem Cable The CAS 81 will respond to proper ASCII code strings received by the Control Port Once a port is selected data will pass between the Control Port and the selected Serial Port Refer to Appendix A for more information on the Control Port interface Â Default Switch An 8 position DIP switch that is used to select the Control ...

Page 6: ...te at 7 bits even or odd parity and at 8 bits no parity Switch Baud Rate 1 2 3 Down Down Down 1200 Up Down Down 2400 Down Up Down 4800 Up Up Down 9600 Down Down Up 19 2K Up Down Up 38 4K Down Up Up 57 6K Up Up Up 115K 3 1 2 Timeout Selection Switches 4 and 5 Selects the No Data Activity disconnect period If data has not been received by the Control Port for the specified time period the selected S...

Page 7: ...ll be ord and passed out the Control Port If data is received by two ports simultaneously data output may be garbled A broadcast one all jumper located on the circuit board will block received data from Serial Ports 2 8 This feature allows the Control Port to receive a response message from just one device when broadcasting commands Receiving data from multiple devices simultaneously may cause gar...

Page 8: ...as a 25 pin DCE modem and accepts a standard PC to Modem straight wired cable Use a Null Modem Cable to connect a modem to the Control Port For a description of the Control Port Interface please refer to Appendix A 3 5 RS422 Line Driver Option Each Serial Port may be configured with an optional RS422 balanced line driver These long distance line drivers can extend high speed transmission distance ...

Page 9: ... of the DIP Switch settings while the unit is powered on you must turn power off and on to reread the switch 4 2 ASCII Characters The PC or controlling device connected to the Control Port must send ASCII characters at the same data rate as the CAS 81 The unit accepts 8 bits no parity or 7 bits even parity 4 3 Command String The command string consists of seven contiguous characters The first 6 ch...

Page 10: ...s above 19 200 bps it is necessary to delay approximately 1 millisecond before sending data out the selected Serial Port This prevents a character that immediately follows the configuration character from being cut in half 4 5 2 Close Port Gating Selected Serial Ports can be closed using three methods 1 By using the Command String to select another Serial Port 2 By Using the Command String to disc...

Page 11: ...t To Serial Port Pin 3 3 TXD Output Low Follows Serial Port 4 RTS Input To Serial Port Pin 7 5 CTS Output High Follows Serial Port 6 DSR Output High Always High 7 GND Signal Ground 8 DCD Output Low Follows Serial Port 20 DTR Input To Serial Port Pin 4 May be forced high by DIP Switches 9 and 10 Always high when all Serial Ports are connected Apx 1 Figure A 1 Control Port Serial Port Interface ...

Page 12: ...l Ground 6 Open 7 RTS Output Low Follows Control Port Pin 4 8 CTS Input To Control Port Pin 5 9 Open A 2 1 RS422 Line Driver Option Each Serial Port may be configured with an RS422 balanced line driver These long distance line drivers can extend high speed transmission distance to 4 000 feet using 2 twisted pair wiring Only the TXD and RXD signals are transmitted The DCD and CTS signals are set to...

Page 13: ...y 115 230 VAC 60 50 Hz 10 Watts Size 1 75 x 17 00 x 6 5 H x W x D One Rack Space Weight 3 pounds 5 pounds shipping C FCC Notice This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial envi...

Page 14: ...9 457 8138 e mail service wti com Trademark and Copyright Information WTI and Western Telematic are trademarks of Western Telematic Incorporated 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 Such information and descriptions may not b...

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