MRV Communications LX-4000 Series manual Control Output Setup and Usage

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Alternative Port Capabilities

Alarm Inputs use the LX-Series input circuits (DSR and CTS) to detect level transitions. These input circuits sit at the 0V level when left unconnected and can accept a voltage input in the range of ±10V.

Figure 20 - Typical Alarm Inputs Connections

An external voltage within the range of ±10V is required in order for a change to be detected when the contact opens or closes. Typically, an LX-Series Control Output is used to provide the controlling voltage for the Alarm Inputs, but it is not required. An external voltage could be used as long as it is within both the ±10V limits and the limits of the contacts or semiconductor used in the circuit. A common Signal Ground is required. Refer to Figure 20 for typical implementations.

Important design issues to remember are:

•Electro-mechanical contacts must be rated up to 10V and 3.5mA.

•The inputs present a nominal 5K Ohm impedance but can vary from 3K to 7K Ohm.

•Input levels must be 0.6V or lower to guarantee a low state and 2.4V or higher to guarantee a high state.

•LX-Series products do not support the use of TXD as the controlling voltage for Alarm Inputs. DTR or RTS must be used.

•DTR or RTS can provide the controlling voltage for up to 2 Alarm Inputs each.

•A common Signal Ground is required. Twisted pair connections are recommended to reduce sensitivity to noise.

Note that provisions for handling alarm contact bounce and alarm flooding are available in the IR- 7104 Alarm Manager family only.

Control Output Setup and Usage

The LX-Series can be configured to provide two low voltage/low current Control Outputs per port using the DTR and RTS output signals. Typically the Control Output is used as the controlling voltage for the LX-Series Alarm Inputs. In another case you can design an interface to transition from the output signals to a higher capacity circuit to implement a control subsystem. An example circuit is shown in Figure 21.

Important design issues to remember are:

•Special design attention is required when using Control Outputs in a control subsystem.

•Upon a restart or power up the states of DTR and RTS will transition several times as the LX- Series begins its start-up initialization.

451-0308

MRV Communications, Inc.

www.mrv.com

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Contents MRV America Sales MRV International Sales MRV Americas Service and SupportGetting Started with the LX-4000 Series Corporate HeadquartersFCC Notice Licensing Notice Bsmi Notice Vcci Notice451-0308 Table of Contents Appendix C Post Test Error Codes Figures 451-0308 Tables 451-0308 Customer Support PrefaceOther Documentation Conventions Chapter Overview of the LX-4000 SeriesDescription System SpecificationsUnpack and Inspect the Unit Chapter Installing the LX-4000 SeriesHardware Installation Package ContentsFront Panel LEDs LX-4000 Indicators and InterfacesPort Status LEDs Rear Panel LEDsRCV Link Mbps Environmental and Installation ConsiderationsCable Connections Connect the Power CableConnecting the Ethernet Interface Mounting the Unit into a 19-inch or 23-inch RackConnecting DC Power Connecting Your Management StationConnect Serial Device Cables Modem Port Optional Powering OnResetting the Unit System Login and PasswordsInstalling the LX-4000 Series Configuring the LX-4000 Unit for the First Time Chapter Configuring the LX-4000 Series for the First TimeFirst Time Quick Configuration 451-0308 Assigning an IP Address via the Network Completing the First Time ConfigurationAccessing and Configuring the Graphical User Interface GUI Manually Setting the IP Address Via the CLIMRV Communications, Inc 451-0308 Web Configure Mode Menu/Config Mode Web Access ModeLaunching the EZConfig GUI GUI EZ ConfigurationAccessing and Configuring Additional Features Software UpgradesIP Configuration Menu Booting from DefaultsAdditional Considerations Additional Considerations for an Internet Environment Command Line Interface CLI Tree StructureAutobauding Feature Reinitializing/Powering Off the UnitConnecting the Temperature/Humidity Sensor Sensor Temperature/Humidity PortsChapter Alternative Port Capabilities Async 4-40access sensor Power ManagementConnecting ConnectingPower Strip Management Telco Alarm Inputs Setup and Usage Using LX Ports as Alarm Inputs and Control OutputsTypical Alarm Inputs Connections Control Output Setup and UsageTypical Interface Design for Control Output Signals LX-4000 Series Specifications Description Appendix a Technical SpecificationsLX-4008, LX-4016 Appendix a Technical Specifications Temperature/Humidity Sensor Specifications Description LX-4000 Series Factory Defaults Description Appendix B Factory DefaultsMain Menu Configuration Factory Default Setting Ppciboot Factory Default SettingsError Code Definitions Appendix C Post Test Error Codes451-0308 Post Test Error Code Sample 3 4 5 6 7 Cabling Considerations Serial Device ConnectorsDiagnostic Port Connector Port Appendix D Cabling the LX-4000 SeriesPin Assignments 10/100 ConnectorModular Adapters Ordering CablesDB-25 Pins Connecting to the Diagnostic Port Port Ordering and Installing the Inlet Connector LockModem Control/Hardware Flow Control Modular Adapters RJ-45 to DB-25 RJ-45 Wiring ConsiderationsSupports RTS/CTS Adapter Wiring, LX-Series to DCE, with Ring MRV 8-Wire CablingLX Series MX-151-3027Numerics DB-2556, 61 RJ-4561 RJ-45 jacks Index
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