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12 Channel VME Bus Cards
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~~~~~~~ FEATURES ~~~~~~~
- Highest Isolated Density 12 Channels/Card
- Low Cost Totally Modular Yet Fully Isolated Design, BUY ONLY
WHAT YOU NEED NOW, Upgrade, add channels anytime, ON SITE with
assured accuracy and performance.
- 16 Bit Precision, Tracking Rate / 1000o/sec.
- Frequency 47 to 10,000 Hz.
- AUTOMATIC Wrap-Around SELF-TEST
- Real-Time CONTINUOS Fault Detect
- Any Mix of Differing Synchro - Resolver, Voltages and
frequencies.
- 100% Transformer Isolated Signal & Ref. I/O
- Individual Real-Time Tracking Converters
- On-The-Fly Resolution
- Large Host of Real-Time Control Functions
- Programmable AC Reference Supplies
- Separate Reference I/O for Every Channel
- Multispeed, and Multiturn Support
- VME, VXI, and 64X styled and Conduction Cooled Models, All
Temps, and enviro's.
- SCHEMATICS Available /Gold Packs
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| Description: The
VSV Series are VME and VXI compatible, 12 channel: isolated, synchro,
resolver, and LVDT input cards with "automatic" wrap-around self-test,
and continuous built-in-test, designed for high performance commercial,
military, and industrial; real-time, instrument, and control
applications.
They will accept up to 12 channels of Direct Synchro, Resolver or
LVDT inputs, and simultaneously convert them into real-time, accurate,
natural binary digital data, available over the VME and VXI compatible
data bus, via standard 16 bit data words, with a truly monotonic
resolution to 16 bits wide (0055o ).
In addition to the transformer isolation, these converters provide
the highest noise immunity in the industry, the closely coupled true
type II servo loop assures the user of a repeatable and virtually
jitter-free responce, even when its input cables are subject to adverse
and electrically hostile surges and transients.
Because of the VSV's Truly Modular Design, Everyone can certainly
reap major cost savings in both their development and whole system
costs, you buy only what you need today, and upgrade as the project gets
bigger or to increase the amount of auxilliary inputs at any time !
Worse case spares simply use a fully populated part number.
VSV cards all feature 16 bit resolution, program configurable
real-time event synchronized "Snapshot" control inputs, independently
isolated reference and signal inputs for each channel, and options that
include both fixed, and, up to 2 channels of programmable, high power,
AC reference supplies.
Because the VSV Series uses proven, reliable whole converter modules,
and leading edge LSI interface technology; VSV Series cards offer COTS
availability, aggressive pricing, and the best density verses
performance and cost ratios available in the marketplace.
The Converters
This series uses high performance, transformer isolated, tracking,
ratiometric; synchro/resolver and LVDT to digital converters, with
internal three-point-angle self test, and built-in-test; having internal
solid state type two servo loops that track the absolute position
displacement, real-time, providing a crisp, virtually dynamic response,
very high accuracy, repeatability, and a resolution of 16 bits wide.
Data made available to the bus is continuously updated (tracking)
without interruption; output data is stable, accurate, and always fresh
up to the maximum tracking rate of the converter. When address and
control variables are set, all data bits are latched simultaneously into
buffered registers to prevent false reads.
Isolation:
Transformer isolated units are completely isolated from each other
and the backplane for all the reference and signal lines. This
completely isolates the card and effectively the whole computer from all
field wiring, eliminating concerns over troublesome ground loops,
differing potentials, ground interjected spikes, or ghostly field noise,
that take down entire systems. |
~~~ Applications ~~~
- Military Servo Control Systems
- Artillery Fire Control Systems
- Antenna, Radar, & Sonar Systems
- Avionic Systems & Instruments
- Robotics and Manipulators
- Naval Retransmission Systems
- Multi-axis Motor Controls
- GPS and Navigation Systems
- Antenna and Radar Systems
- Fuel Rod Positioning Systems
- Vehicular control systems
- Semiconductor Wafer Handling
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| Data Bus: Maximum
versatility has been employed to assure universal compatibility in
addressing, timing, system, microcomputer, and multiple processors on
the bus, independence..
Status registers are used to provide card configuration data, and on
a per channel basis, to provide channel configuration, and fault status.
The VSV Series is designed with a powerful register-based control
platform that provides Automatic Wrap-Around Self-Test and other
intelligent type yet real-time control functionality; without the use of
slower, less reliable, and software burdened, manual user code driven,
or microprocessor type implementations.
All registers are interrupt-free, high speed data access; simply
address and read/write the data. Thus, the user gets true automatic
self-test, software-free confidence, and, powerful dynamics control and
report functionality, with all the ease of using simple, direct, high
speed register access.
The high speed register based interface allows these cards to operate
reliably in any software environment, with uninhibited Real-Time
performance.
All command and configuration registers are provided with "Read-back"ability,
to assure support with multiple processors running on the bus.
ALL THE FEATURES SHOWN, control functionality, and self test,
EVERYTHING,..IS STANDARD EQUIPMENT SHIPPED ON ALL UNITS ! the only
options are package grade, and reference supplies. |
| Reference Supply Options
12 Channel cards can have 1 reference supply, 400 to 10,000 Hz. up to
28VAC, or 115VAC @ 400Hz. Models can have 1 or 2 separately isolated
outputs, output drive options up to a 5VA. up to 2 programmable, or
even 6 fixed AC reference supplies. The Programmable Reference Supplies
are suitable for driving external Synchro, Resolver and LVDT/RVDT
sensors, instruments or simulators. The parameters are register
programmable for a frequency range of 400 to 10,000 Hz., and an
amplitude range of 0 to 28VAC. |
| Snapshots, External
Synchronized Inputs: "Real-Time-Event Position Capture": For time
or external event driven applications, taking real-time snapshots, on
test apparatus, for target confirmations, and strobe-light style
position strobes. The "Snapshot Position Capture" inputs register
masked to activate any selection of channels. A Low logic level input
will freeze the data, and positive inputs cause: fresh, real-time data
to continuously flow through the registers awaiting either standard
reads, synchronized, or fresh snapshot "freeze" input strobe. |
| Automatic Wrap-Around
Self-Test The VSV Series includes a very comprehensive Automatic
Wrap-Around Self Test feature that, may be selected to be initiated by
the VME Bus System Reset, and at any time may be initiated by the
control word with a card reset or Auto-Test command bit.
During the auto-test, the VSV card first runs an internal register
transfer, verifies the results and auto-configures the card to default
settings. If successful, a passed (initiation) bit in the status word is
set. Next, the VSV Card internally disconnects the field signal inputs,
and instead injects into the converters fixed analog test angle,
compares all the converters results to acceptable tolerances, compiling
a report, the VSV card then switches back in the field signal inputs and
checks for signal loss and built-in-test status. If all was successful
the Ready Bit in the status word is set and Fail LED cleared. A global
fault status bit and channel fault register is used to identify each
channels results.
The 115VAC @ 400 Hz. option is a utility for high voltage
applications, where a 400Hz. source may not be readily available.
All of the Reference supplies feature virtually indestructible
short-circuit proof outputs, transient protection and internal heat
sinks, with added design considerations for conduction cooled models.. |
| Package style and
Temperature Grade: Package options available range from standard
low-cost commercial air-cooled VME and VXI compatible B size cards,
extended temperature range industrial cards, conduction cooled
industrial units, MIL-Grade Extended Temperature Range Conduction Cooled
assemblies, and Size C cage-shielded VXI model variations.
Conduction cooled units (CCAs) are designed to IEEE Std. 1101.2 for
military and rugged applications; provided with an additional thermal
conductive layer for optimum heat transfer toward the top and bottom
edges, and wedge style card-lock expanders on the card guide edges for
conductive heat transfer to the chassis. The temperature considerations,
the use of board stiffeners, thru hole semiconductors/PGA's, and
encapsulated converters; provide high resistance to shock and vibration,
and large temperature extremes typical of many military and
mobile-industrial applications.
All the same wiring, functionality, versatility, and software
control. This allows users to buy only the package variant they need for
each specific application, to reduce system development and product
cost. |
| Real-Time Read Control
Functions: All Data Reads are automatically transfer synchronized
to the user, insuring that they only report real-time valid data.
However, two additional types of mechanism are made available to
insure that every users interpretation of real-time, whether based on
each converters real-time position, some external event, time driven,
synchronized real-time, or even choice multi-channel synchronization is
achievable, and simply executed with the standard product. |
| Multispeed/Multiturn and
Synchronized reads: The VSV firmware supports simultaneous
multi-channel store-to-read commands required to properly interrogate
multispeed/multiturn resolvers and synchro's .
Standard reads require no assist. Synchronized axis', and multi-speed
or 2-3 resolver gang-geared multiturn synchro or resolver packages, can
have their respective channels latched simultaneously.
Accurate Multitspeed and Multiturn readings can be achieved
regardless of the fine/coarse alignment on the field mounted
synchro's/resolvers or field input devices. In fact even
intentionally offset or arbitrary fine/coarse placement can
be converted to accurate, totally useable, linear, and non-ambiguous
data. |
| Programmable Force Freeze:
The Programmable Force Freeze is a user freeze command register, simply
clear bits corresponding to any or all the channels that should have a
mutually synchronized read, and read the data. This mechanism insures
that the desired channels are read together, all their data was captured
at the same point in time, and that no data skewing between channel
reads is possible (regardless of unrelated interrupts to the master).
This is enables real-time program controlled snapshots, or simultaneous
captures of multiple axis without time skew, ideal for time stamping,
system analysis, synchronizing, and multi-axis coordination. |
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