Envision Peripherals NV3128 manual Multidrop Command Chains, Physical

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MULTIDROP COMMAND CHAINS

Gating off the response transmitter in a controlled port is an effective and transparent technique to resolve bus contention in a multi-drop command chain. In such a mapping, the controlling device sends commands to multiple destinations, but only one destination is allowed to respond. All other controlled-port transmitters are gated off. By design, the NV3128 controller allocates the response transmission path to the first target connected to the source, therefore the user designates the responding machine by the ordering of his take salvo.

1.3 I/O

A passive connector-interface backplane couples the active I/O modules and their external connections. Active modules can thus be removed without disturbing external cabling.

Data port connectors are RS-232 9-pin D. Video reference input ports are BNC. A female, 9-pin D connector recieves the serial router control system cable, and a 37-pin female D connector implements a parallel router-control interface (older frames only). Both control interfaces and both reference inputs provide unbuffered loop-through connectors.

1.4 PHYSICAL

Physically, the NV3128 frame installs in a 19" EIA equipment rack. Its aluminum frame requires no additional cooling, and will operate in ambient temperatures in the range from 0-50 degrees celcius. The 8 rack-unit high frame houses two backplanes, one for inter-module signal traffic, the other mounting I/O connectors. The active modules are inserted from the front of the frame. The modules consist of:

·Crosspoint Assembly (1) EM0041-XX

·I/O Assembly (2 - NV3128, 1 - NV3064-D) EM0040-XX

·Universal Control (1, redundant 2nd optional) EM0134-XX

·Power Supply (1, redundant 2nd optional) PS2001-01

NV3128 RS-422A Machine-Control Data Switch

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Contents Nvision PrintingHistory WarrantyStatement TechnicalSupport ImportantSafeguardsandNotices Page Page NorthAmericanPowerSupplyCords Tableofcontents Page Generalinformation NV3128 RS-422A Machine-Control Data Switch Generalinformation GeneralArchitecture 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 Multidrop Command Chains PhysicalSystem Specifications Ancillary Equipment1NV3128SPECIFICATIONS Installation NV3128 RS-422A Machine-Control Routing Switch Chapter TWO Installation NV3128 RS-422A Machine-Control Routing Switch Frame Installation Universal Control or Command Interpreter Partitioning ObsoletePartition DIP Switches Obsolete Settings RE-INITIALIZE BIT/MULTIDROP Enable s7Matrix Control II Jumpers Obsolete Input Length s8-s5RS-422A RS-232 Configuring the Diagnostic Interface Obsolete Parallel Interface ObsoleteJumper Enabled Disabled Configuring the Reference Input Reference Input Ground ObsoleteCabling the Serial Command Interface Cabling the NV3128PIN RS232 Obsolete RS-232 DCE VS. DTE Decision ObsoletePIN Connector Adding a Redundant Controller Implementing HOT Changeover ObsoletePC Diagnostic Interface UNIDIAG/NVUTILS Cabling CompleteRear Connections NEW Frame Rear Ections OLD Frame Rearconnections OLD Frame General PC-BASED Software Installation ObsoleteInstallation NvtakeSoftware Installation Fixed Disk Sample Install SessionHardware Configuration Operation from a Floppy DiskOperation NV3128 RS-422A Machine Control Data Routing Switch Operations Connection NotesPOINT-TO-POINT Connection Rules Multidrop Connection RulesComputer Utilities Obsolete Operations Operating Instructions Nvtake ObsoleteInvocation F3 Change Router LevelF1 Sending a Single Take F9 Build a Salvo Table F10 Load a Salvo from Disk F2 Send a SalvoF5 Query Multiple Connections F6 List Destinations Connected to a SourceOperating Instructions Nvmap Obsolete OperationNV3128 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 System Control StructureNV3128 RS-422A Machine-Control Data Routing Switch Circuit Operation 1 I/O Connector InterfaceSignal Backplane Assy EM0038-XXCrosspoints Crosspoint Module Assy EM0041-XXInput Data Output Data4 I/O Assembly EM0040-XX Mapping Asynchronous Timing Parallel Interface Command Interpreter onlyPower Regulation 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 Customer Support Scheduled MaintenanceReliability Isolating Faults TroubleshootingPower Signal Path Mapping and Command ProblemsNV3128 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