Western Telematic PLS-345 manual Application Examples, Monitoring Signal Drop and/or Power Loss

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9.Application Examples

9.1.Monitoring Signal Drop and/or Power Loss

In this application, the PLS-345 will monitor the DTR signal from a data device. If the signal drops or the data device loses power for more than one minute, the unit will automatically switch circuits 2 and 3 to the "B" line.

Figure 9.1: Monitoring Signal Drop

1.Connect Line from Data Device: Connect a line from the Data Device to the Monitor Input Connector as shown in Figure 9.1.

2.Set Monitor Selector Switch: Locate the Monitor Selector Switch on the PLS back panel. Slide the switch to the "RS232" position.

9-1

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Contents PLS-345 Page Shock Hazard Do Not Enter Nameplate Power WarningVentilation Enclosed RacksTable of Contents Application Examples Command SummaryIntroduction Monitor ModeApplications Typographic ConventionsFront Panel Unit DescriptionBack Panel Back PanelUnit Description PLS-345 Physical Layer Switch Users Guide Quick Start / System Overview $ telnet 192.168.168.168 Enter Modem & Console Port Access Factory set PLSCircuit Status Screen Command Help Screen System Mode Installation Power Supply ConnectionInitialization Connecting the Network Cable Connecting Common and A/B LinesConnecting an External Modem Connecting a PC to the Console PortSystem Mode and User Mode SetUp and ConfigurationCommunicating with the PLS-345 SetUp and Configuration PLS Command/Menu Conventions Defining General Parameters SetUp and ConfigurationPLS-345 Physical Layer Switch Users Guide SetUp and Configuration Circuit Parameters Menu Circuit ParametersNetwork Parameters Network Parameters Menu IP Security Implementing IP SecurityExample 1 Deny access to all hosts except Monitor Mode Hardware ConfigurationSelecting Monitor Mode Parameters Monitor Mode Parameters Menu Switch if Level 1 High Switch to Position B Return On Save Configuration Parameters Circuit Status Screen Status ScreensPLS-345 Physical Layer Switch Users Guide Port Network Status ScreenPLS-345 Physical Layer Switch Users Guide Operation Manual A/B Switching/A Command and the /B Command Code Activated A/B SwitchingEnter or /B n Enter EnterCommand Confirmation Prompt /D Command Monitor Mode Sending Parameters to a File Saving and Restoring Configuration ParametersRestoring Saved Parameters Application Examples Monitoring Signal Drop and/or Power LossAUX Port Connection Monitoring a Contact Monitoring a Switch or RelayItem 6 Circuits to Switch Enable the Monitor Mode at circuit Display Commands Command SummaryDisplay Help Screen Display Circuit StatusSN Display Network Status Configuration CommandsView/Set General Parameters View/Set Circuit ParametersView/Set Monitor Mode Parameters DL Download Configuration to FileView/Set Network Parameters Control Commands Switch Circuit n to Line aSwitch Circuit n to Line B Reset Network Interface Set Circuits to DefaultCommand Format /D Enter Command Arguments Command Format /T Enter Command ArgumentsExit/Disconnect Command Format /X Enter Command ArgumentsInterface Descriptions Console Port InterfaceModem Port Interface Figure A.3 Common Ports and A/B Ports Common Ports and A/B PortsSpecifications SwitchingSize Trademark and Copyright Information Customer ServiceIndex Index-2 Page Sterling Irvine California 949 586-9950 Toll Free