Products

CAMAC - 3922 Parallel Bus Crate Controller View Datasheet Request Ordering Information     ABOUT 3922 The Model 3922 is a double-width CAMAC crate controller that connects to the associated computer interface card via a parallel bus. When used with the Model 2926, 2927, or 2928 interface card, the combination forms a computer-based CAMAC system with an IBM PC/AT reg. or PS/2® or compatible processor as the host. The Model 2922 interface card can also be used with the 3922 to form a DIGITAL Q-bus-based CAMAC system. A Macintosh II host isinterfaced using the Model 2932, any VME-based computer is interfaced usingthe Model 2917, and PCIbus systems can utilize the 2915 PCI adapter. Up to eight 3922s can be addressed on the interface bus. The crate address (0 through 7) is selected by a front-panel switch. A single 40-wire ribbon cable is connected to the computer interface card and looped-through the crate controllers. Interface bus connections are made at the rear of each 3922. The last 3922 terminates the bus. RS-485 balanced-line signaling is used on theinterface bus to allow reliable operation with up to 91 meters (300 feet) oftotal bus length. Twisted-pair, flat-ribbon bus cable enhances data integrity. The eight-bit interface bus is multiplexed for address and data transfer. Appropriate control/response signals are also included. The 3922 supports the DMA capabilities of the 2922, 2926, 2927, and 2928 adapters. Sixteen-bit DMA data is transferred at rates up to 1 Mbyte/s for the Model 2922, and 250 kbyte/s for the 2926, 800kbyte/s for the 2927, and 500 kbyte/s for the 2928. Block transfers are supported when interfacing to a computer with the 2917 VMEadapter, 2932 Macintosh II adapter, or our newest addition: the 2915 PCI adapter. A 24-bit LAM mask is included to simplify the host software. A "SelectedLAM Present" causes a service request to the computer interface. Aparallel poll is per-formed to determine which 3922s are requesting service.

Features Forms a dedicated Q-bus™ interface with a 2922 card or VME interfacewith a 2917 card Forms a dedicated PC interface with an associated 2926, 2927, 2928, or 2932 card Field-selectable as a main or auxiliary crate controller Up to eight crate controllers addressed on a single bus Supports DMA with 2922, 2926, and 2928 and block transfers with 2917 and2932 Includes a 24-bit LAM mask Contains RS-485 balanced-line signaling for high noise immunity Supports interface bus lengths up to 91 meters (300 feet) Applications Interface to DIGITAl Q-bus computers or VME-based computers Interface to IBM PC/AT®, PS/2® Interface to PCI-based Macintosh™ (with Sparrow Kmax* driver software) General-purpose data acquisition and control Laboratory automation Industrial process control Remote distributed system Replacement for Parallel Highway systems -- Jump to Data Acquisition Product -- Counters and Pulse Output Modules Relay Multiplexer Mainframe/Chassis Analog and Digital I/O Analog I/O and Signal Conditioners Counters and Pulse Output Modules Digital Input and Output Memory, Controllers, DSPs & Mainframes Modules for the V710 Termination Panel Signal Conditioner Chassis Special Functions Termination Assemblies and Panels VME to VXI Carrier/Adapter Card VXI Software Applications, Drivers, etc. Grand Interconnect Analog Input Analog Output Cables and Connectors CAMAC Equipment Controllers & Misc. Counters, Timer and Clock Module Digital Input Digital Output Display Memory Modules Process Interface Special Function Modules Software Drivers Transient Recorder Modules Instrumentation Recorders Signal Conditioning Systems Data Loggers/Recorders Temperature Loggers Cyber Systems Data Acquistions Systems Preston Scientific Analog & Digital Systems Return to Product Category