+​91-40- 27141522 or 27141533

Apollo Computing Laboratories (P) Ltd

 ​mktg@apollocomputing.com

Missile Interface Unit (MIU)

Overview

This system is available in two versions, one based on Intel 87C196 CPU and the other with Motorola’s 68332 Micro-Controller. The resources include 88 DIPs, 100 DOPs, 48 Analog Inputs, 12 Analog Outputs, 4 RS-422 channels & one MIL-STD-1553B interface.

Salient Features

Two versions
 87C196 Microcontroller based 68332 Microcontroller based.

Interfaces 
Digital inputs - 88 Nos. Active (opto isolated), Passive (opto isolated) 
Digital outputs - 100 Nos. 
Analog inputs - 48 Nos. 
Analog outputs - 12 Nos. 
MIL-STD-1553B-SERIAL bi-directional communication interface- 1 No.
Point to point serial communication RS-422 - 4 Nos.

Applications

Being used as data acquisition systems for National programmes.

Command Control Signal Conditioner (CCSC)

Compliance to MIL-STD-461E & MIL-STD-810F

This package is one of the critical avionic packages. The unit receives commands from onboard computer over 1553B bus and is responsible for switching relays, monitoring their status, sending command voltages to control systems, providing excitation supply to pressure transducers, conditioning received signal voltages and measuring parameters like system pressures and battery voltages.

ASTRA-OBC

Astra OBC Introduction

On Board Computer is a ruggedized computer designed to carry out various functions, viz. control, guidance, monitor the health of sub systems. The OBC interacts with Receiver and Telemetry using 1553B bus. In addition OBC also has other interfaces like Discrete Outputs interface and control system interface (Analog I/O).OBC operates on 28 V DC input supply.

The On Board Computer is based on distributed architecture system and real time data exchange is required between various subsystems. OBC is based on ADSP21060 processor. It has two channels of dual redundant MIL-STD-1553B buses.

3/4th ATR Chassis

¾ Aviation Transport Rack
Overview

The ¾ Aviation Transport Rack is a LRU, which is required to function in a highly reliable and safety critical environment. The ¾ ATR is a Ruggedized Mechanical chassis. The basic concepts of focus are the inter-changeability of the LRU, high levels of Thermal Management, easy mode of operation and maintenance.

 Specifications of 3/4th ATR Chassis

  • Size : ¾ ATR Short
  • Height : 194 mm
  • Width : 191 mm
  • Length Between Mounts : 320 mm
  • Capacity : 8 Slots – 6 U VME Modules
  • Weight : 8 Kg Max - (Chassis & Power Supply)
  • Mounting Tray : Mounting Tray Design shall be as per ARINC 404 A Specification
  • Material : Material used for Chassis & Tray shall be of Aerospace Alloy Grade
  • Finishing : Black paint Matt finish on all external surfaces and conductive chromate conversion coating on all inside surfaces.
  • Power Rating : 250 Watts (Max.) 
  • Cooling :External Forced Air Cooling and Internal VME Modules & Power Supply Module are Conduction Cooled
  • Operating Temperature : -40°C to +85°C with 1 Kg per minute airflow with an inlet temperature of 24°C ± 2°C
  • Water Proofing :Water Proofing to confirm MIL-STD-810D (Rain Drip test)
  • Back Plane :8 Slot VME 64x Compliant Back Plane 5 - Row P1, P2 & P0 connector compatible for 3 row VME Module
  • Input Power (DC) : 28V @ 30A Range (16V – 32V) as per MIL-STD-704D.
  • Output Power Ratings (DC) :+5 V @ 40 A (200 W)+3.3 V @ 10 A (33 W)+12 V @ 1.25 A ( 15 W)-12 V @ 0.420A ( 5W )
  • Connectors : MIL-D38999 series – 6 Nos, MIL-STD-1553B – Raychem – 6 Nos.
  • 1553B Nodes : 6 Nos.

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

Overview

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:

  • 8 TTL - OC inputs
  • 8 TTL - OC outputs
  • 4 RS232 / RS422 level inputs - Jumper selectable
  • 4 RS232 / RS422 level outputs - Jumper selectable
  • 2 Opto - Isolated inputs
  • 2 Opto - Isolated outputs
  • Two 28V operated Relay inputs and Two 5V operated Relay outputs
  • Two Serial Communication lines using 82C52 with RS-422 interfaces
  • 16 Channel 12 bit, 10msec ADC using AD1674
  • 8 First order filters (3 channels with amplifiers and 5 channels with unity gain
  • 8 Second order filters with 3 two stage amplifiers
  • 8 Buffered analog output channels using AD664,12-bit DAC & OP27
  • Four D/A channels are routed back to MUX for monitoring
  • Three Programmable Interval counters/timers with gating implemented using Intel- 82C54
  • Wedge locks are fitted for providing stiffener functions
  • Integrated Heat Sink PCB for effective heat dissipation/transfer
  • All important signals are terminated on right angle plug (Airborne make: WG160PR9SY)
  • PCB: Size : 183mm x 137mm

Power Supply Card:

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.

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:

  • Intel 80486 processor Operating at 64 MHz speed
  • 2 MB (512K x 32) Flash EPROM Code memory (Tacc = 70nsec)
  • 2 MB (512K x 32) Flash EPROM Data memory (Tacc =70nsec)
  • 2 MB (512K x 32) SRAM (Tacc = 20nsec)
  • 32KB (32K x 8) NVRAM
  • Cacheable Burst cycle for memory read cycle
  • 8 No's of fully user configurable interrupts are provided using Intel-82C59 interrupt controller
  • One 82C52 with RS-232C interface
  • One 82C52 with RS-422 interface for inter-processor communication
  • Three 82C54 timers with provision for gating.
  • One 1553B node with ILC-DDC's BU-61588 P3-110
  • Real-mode of operation
  • Flexibility to address external I/O modules in 16 bit mode
  • Fully buffered Address, Data & Control Bus signals
  • Remote reset facility through an Opto-isolated external Reset input
  • Power On reset using Max-705
  • Separate wait states for EPROM, SRAM and I/O devices
  • Glue logic implementation using Cypress CPLD
  • The bus signals and all important signals are terminated on right angle plug
  • (Airborne make: WG 160PR9SY)
  • Wedge locks are fitted for providing stiffener functions
  • Integrated Heat Sink PCB for effective heat dissipation/transfer
  • PCB: Size: 183mm x 137mm

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