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S940 | 3U CompactPCI Digital I/O Board
The S940 radiation tolerant digital I/O board provides a variety of discrete TTL, opto-isolated RS422 and RS232 serial ports. It is designed to interface with typical satellite guidance, navigation and control sensors such as Space Integrated GPS/INS (SIGI), torque rods, solar array drive electronics, separate switches, reaction wheels and payloads with a UART interface.
- Designed for LEO, Mars Terrestrial with an Option for GEO Environments
- Single-Slot Conduction-Cooled 3U CompactPCI card
- Twelve RS422 Outputs and Four RS422 Inputs: Space Integrated GPS/INS (SIGI) Interface – Sync Timer and Telemetry Serial Input, Star Tracker: Telemetry Serial Input and Command Serial Output
- Two RS232 UART ports
- Reaction Wheel Tachometer Interface
- Separation Switch Closure Interface
- Three 2A Rated H-Bridge Torque Rod Interface
- Logic Discrete Output Drivers: SADE Pulse Generator and Registered Output
- Two Opto-Isolated Discrete Output Drivers
- Triple-Voted Buffered Memory for Serial Interface
- 33 MHz, 32-bit PCI 2.1 Compliant CompactPCI Interface
- Nominal Power Consumption is Less Than 14 Watts
- Level-2 Components per NASA GSFC 311-INST-001A Specification are available
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