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Summary of Contents for WTI 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 ·...
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Page 2: Table Of Contents
Table of Contents In tro duc tion ..........1-1 Unit De scrip tion . -
Page 3: Introduction
Devices can be connected or disconnected by sending commands from a remote PC via modem. The CAS-81 can operate at speeds up to 115,000 bps and passes data in "real-time" with no delays. Binary and graphics files can be safely passed due to the unique 8 character switch instruction, which considerably reduces the chances of false switching. -
Page 4: Unit Description
À ON: Indicates power to the unit is ON. Á RDY: Indicates unit is Ready to operate. A steady blink indicates that the CAS-81 is operating normally. Â TXD: Indicates that data is being received at Control Port pin 2. -
Page 5: Back Panel
Control Port: RS232 DB25 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. -
Page 6: Installation
Select the Baud Rate for the Control Port. The Baud Rate must match that of the control device. The CAS-81 is transparent to parity and will operate at 7 bits even or odd parity, and at 8 bits no parity. -
Page 7: Auto Connect Serial Port 1 (Switch 7)
CAS-81 Code Activated Switch, User's Guide 3.1.4. Auto Connect Serial Port 1 (Switch 7) When enabled, automatically connects the Control Port to Serial Port 1 on the following conditions: 1. Power Up 2. After a Timeout disconnect, if selected. 3. After a Code sequence disconnect. -
Page 8: Connect Power Cable
CAS-81 Code Activated Switch, User's Guide 3.2. Connect Power Cable Make certain that the CAS-81 power switch is set in the OFF position and then connect the power cable to the AC Power connector. Connect the other end of the power cable to a grounded AC wall outlet. -
Page 9: Operation
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. -
Page 10: Command Response
CAS-81 Code Activated Switch, User's Guide 4.4. Command Response Upon receiving a valid command string, the CAS-81 will send an acknowledgment message out the Control Port. The message is sent as 8 bits / no parity. Acknowledgment messages are as follows: Connected <CR>/<LF>... -
Page 11: Description Of System Interfaces
A. Description of System Interfaces A.1. Control Port (DB25 Female) The Control Port is a 25 pin female connector wired in a DCE (modem) configuration. May be forced high by DIP Switches 9 and 10. Always high when all Serial Ports are connected. -
Page 12: Appendices
CAS-81 Code Activated Switch A.2. Serial Ports 1 through 8 (DB9 Male) The Serial Ports are 9 pin male, wired in a DTE configuration similar to that of an A computer. Figure A.1 and the table below describe the Serial Port interface. -
Page 13: Specifications
CAS-81 Code Activated Switch B. Specifications Interface: Control Port: (1) RS232, 25 pin female, DCE configuration. Serial Ports: (8) RS232, 9 pin male, DTE configuration. Optional - RS422 Line Driver (TXD and RXD only) Signals Gated: TXD, RXD, RTS, CTS, DTR, DCD Protocol: Asynchronous ASCII, 7/8 bits, Any Parity, One Stop Bit. -
Page 14: Customer Service
Return Authorization number from Customer Service. 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.
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