Back Panel | Western Telematic CAS-81 manual

CAS-81 Code Activated Switch, User's Guide	Unit Description

Figure 2.2: Back Panel

2.2.Back Panel

ÀSerial Ports 1 - 8: Eight RS232 DB9 male connectors configured as DTE. Accepts a standard AT 9 pin to printer or modem cable, depending on the application. Refer to Appendix A for more information on the Serial Port Interface.

Note that when the RS422 Line Driver Option has been installed, an LED indicator will be present in the blank above the Serial Port. This LED indicates that the port is configured for RS422 communication.

ÁControl 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. Refer to Appendix A for more information on the Control Port interface.

ÂDefault Switch: An 8 position DIP switch that is used to select the Control Port Data Rate, No-data timeout period, and the Auto connect and broadcast features. This switch is read upon power up.

ÃAC Power: Standard AC power cord receptacle and ON/OFF switch.

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