Ruggedized Data Acquisition 1

Ruggedized Data Acquisition System Based on Intel – 80486 CPU with MIL-STD-1553B Interface

Unit is based on Intel-80486 CPU operating at 64Mhz speed. It communicates with external units through MIL-STD-1553B Channel. It has 4 MB of Flash and 2 MB of SRAM along with 32 discrete inputs/outputs, three serial RS-422 interfaces, 16 analog inputs & 8 analog outputs, 6 timers, and One RS-232 interface.

The system is a self-contained unit and operates with DC input of 28V. The unit has circular connectors on its back panel for external interfaces. The MIL-STD-1553B interface is provided through BJ-77 Connectors. Provision for future growth potential is provided though addition of a mezzanine connector. Additional interfaces can be added through the addition of mezzanine cards for custom-built requirements. State of the art components / technology are used for the design.

32 discrete I/O ports and glue logic is implemented with Cypress CPLD with following interfaces:

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8 TTL - OC inputs
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8 TTL - OC outputs
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4 RS232 / RS422 level inputs - Jumper selectable
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4 RS232 / RS422 level outputs - Jumper selectable
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2 Opto - Isolated inputs
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2 Opto - Isolated outputs
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Two 28V operated Relay inputs and Two 5V operated Relay outputs

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Two Serial Communication lines using 82C52 with RS-422 interfaces
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16 Channel 12 bit, 10msec ADC using AD1674
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8 First order filters (3 channels with amplifiers and 5 channels with unity gain
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8 Second order filters with 3 two stage amplifiers

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8 Buffered analog output channels using AD664,12-bit DAC & OP27
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Four D/A channels are routed back to MUX for monitoring
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Three Programmable Interval counters/timers with gating implemented using Intel- 82C54

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Wedge locks are fitted for providing stiffener functions
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Integrated Heat Sink PCB for effective heat dissipation/transfer
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All important signals are terminated on right angle plug (Airborne make: WG160PR9SY)
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PCB: Size : 183mm x 137mm

Power Supply Cord

The required power supplies in the system are derived using DC-DC converters and other electronics with 28V DC input. The following supplies are generated: PCB: Size: 156mm x 132mma) + 5V, 8A b) +15V, 1A c) -15V, 1A

Software

The system comes with advanced monitor software along with powerful diagnostic software to test each and every resource exhaustively. The system also comes with highly validated 1553B library functions.

Specifications of Ruggedized Data Acquisition System Based on Intel – 80486 CPU with MIL-STD-1553B Interface

The unit has one CPU card, one I/O card, one Power supply module and a Motherboard. Specifications of CPU, I/O and Power Supply modules are given below. The Mother board and mechanical chassis can be configured based on application

CPU card has the following features:

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Intel 80486 processor
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Operating at 64 MHz speed
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2 MB (512K x 32) Flash EPROM Code memory (Tacc = 70nsec)
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2 MB (512K x 32) Flash EPROM Data memory (Tacc =70nsec)
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2 MB (512K x 32) SRAM (Tacc = 20nsec)

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32KB (32K x 8) NVRAM
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Cacheable Burst cycle for memory read cycle
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8 No's of fully user configurable interrupts are provided using Intel-82C59 interrupt controller
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One 82C52 with RS-232C interface

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One 82C52 with RS-422 interface for inter-processor communication
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Three 82C54 timers with provision for gating.
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One 1553B node with ILC-DDC's BU-61588 P3-110
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Real-mode of operation

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Flexibility to address external I/O modules in 16 bit mode
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Fully buffered Address, Data & Control Bus signals
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Remote reset facility through an Opto-isolated external Reset input

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Power On reset using Max-705
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Separate wait states for EPROM, SRAM and I/O devices
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Glue logic implementation using Cypress CPLD
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The bus signals and all important signals are terminated on right angle plug

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(Airborne make: WG 160PR9SY)
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Wedge locks are fitted for providing stiffener functions
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Integrated Heat Sink PCB for effective heat dissipation/transfer
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PCB: Size: 183mm x 137mm

Apollo Computing Laboratories (P) Ltd