Envision Peripherals NV3128 manual 4 I/O Assembly EM0040-XX

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4.2.4 I/O ASSEMBLY: EM0040-XX

The I/O module is a bidirectional interface between the router's crosspoint matrix and the external machines. Two modules, each supporting 64 ports, make up the full complement of I/O circuits. The assembly plugs simultaneously into both backplanes, communicating with the crosspoint module through the Signal Backplane and with the external machines through the I/O Backplane.

A total of 64 proprietary receiver/driver submodules pass data to and from the I/O backplane. Each submodule makes the D connector it services function as either a controlled or a controlling device, depending on whether it is addressed as a Source or as a Destination.

Two 64x64 crosspoint ICs use control information received from the Command Interpreter to gate the submodule transmitters and receivers on or off appropriate to the directions of data flow through the port.

The command information is resistor-coupled from the Signal Backplane into line buffer/driver circuits and their associated resistor networks. A similar circuit arrangement receives crosspoint data from the Signal Backplane and applies it to the port submodules for transmission to external machines.

Receive data from the port submodules is driven over the Signal

Backplane to the Crosspoint Module by drivers ICs.

Submodules each operate separately on the raw DC input voltage to provide +5VDC operating levels for 1/2 the available circuits. By thus dividing the circuitry, the impact block of a failure is correspondingly reduced.

NV3128 RS-422A Machine-Control Data Routing Switch

4-7

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Contents Nvision PrintingHistory WarrantyStatement TechnicalSupport ImportantSafeguardsandNotices Page Page NorthAmericanPowerSupplyCords Tableofcontents Page Generalinformation NV3128 RS-422A Machine-Control Data Switch General GeneralinformationArchitecture Background NV3128 RS-422A Machine-Control Data Switch NV3128 RS-422A Machine-Control Data Switch NV3128 RS-422A Machine-Control Data Switch Solution Dynamic Ports Crosspointarchitecture NV3128 RS-422A Machine-Control Data Switch Physical Multidrop Command ChainsAncillary Equipment System Specifications1NV3128SPECIFICATIONS Installation NV3128 RS-422A Machine-Control Routing Switch Chapter TWO Installation NV3128 RS-422A Machine-Control Routing Switch Frame Installation Partitioning Obsolete Universal Control or Command InterpreterPartition DIP Switches Obsolete RE-INITIALIZE BIT/MULTIDROP Enable s7 SettingsInput Length s8-s5 Matrix Control II Jumpers ObsoleteRS-422A RS-232 Parallel Interface Obsolete Configuring the Diagnostic Interface ObsoleteJumper Enabled Disabled Reference Input Ground Obsolete Configuring the Reference InputCabling the NV3128 Cabling the Serial Command InterfacePIN RS-232 DCE VS. DTE Decision Obsolete RS232 ObsoletePIN Connector Implementing HOT Changeover Obsolete Adding a Redundant ControllerCabling Complete PC Diagnostic Interface UNIDIAG/NVUTILSRear Connections NEW Frame Rear Ections OLD Frame Rearconnections OLD Frame Installation PC-BASED Software Installation ObsoleteGeneral NvtakeSample Install Session Software Installation Fixed DiskOperation from a Floppy Disk Hardware ConfigurationOperation NV3128 RS-422A Machine Control Data Routing Switch Connection Notes OperationsMultidrop Connection Rules POINT-TO-POINT Connection RulesComputer Utilities Obsolete Invocation Operating Instructions Nvtake ObsoleteOperations F3 Change Router LevelF1 Sending a Single Take F9 Build a Salvo Table F2 Send a Salvo F10 Load a Salvo from DiskF6 List Destinations Connected to a Source F5 Query Multiple ConnectionsOperation Operating Instructions Nvmap ObsoleteNV3128 RS-422A Machine Control Data Routing Switch Screen NV3128 RS-422A Machine Control Data Routing Switch Theoryofoperation NV3128 RS-422A Machine-Control Data Routing Switch Control Structure SystemNV3128 RS-422A Machine-Control Data Routing Switch Signal Backplane 1 I/O Connector InterfaceCircuit Operation Assy EM0038-XXInput Data Crosspoint Module Assy EM0041-XXCrosspoints Output Data4 I/O Assembly EM0040-XX Mapping Power Regulation Parallel Interface Command Interpreter onlyAsynchronous Timing PartitioningPower Supply Assy PS2001-XX NV3128 RS-422A Machine-Control Data Routing Switch NV3128 RS-422A Machine-Control Data Routing Switch Maintenanceand Troubleshooting NV3128 RS-422A Machine Control Data Routing Switch Scheduled Maintenance Customer SupportReliability Troubleshooting Isolating FaultsPower Mapping and Command Problems Signal PathNV3128 RS-422A Machine Control Data Routing Switch Glossary NV3128 RS-422A Machine-Control Data Routing Switch AES/EBU MOV Vcxo NV3128 RS-422A Machine-Control Data Routing Switch Index NV3128 RS-422A Machine-Control Data Switch Index-2 Index NV3128 RS-422A Machine-Control Data Switch Index-4 NV3128 RS-422A Machine-Control Data Switch Index-5 NV3128 RS-422A Machine-Control Data Switch Index-6