S940 Radiation Tolerant 3U CompactPCI Digital I/O Board
Aitech Systems
A radiation-tolerant 3U CompactPCI digital I/O board providing 12 RS-422 outputs, 4 RS-422 inputs, 2 RS-232 UART ports, 3 H-bridge torque rod interfaces, and opto-isolated discrete drivers with triple-voted serial buffers for ADCS applications.
Technical specifications
- RS-422 Output Channels
- 12
- RS-422 Input Channels
- 4
- RS-232 UART Ports
- 2
- H-Bridge Torque Rod Interfaces
- 3 (2A rated)
- Discrete Output Drivers
- 2 opto-isolated
- Power Consumption
- < 14 W nominal
- Memory Protection
- Triple-voted buffered (serial interface)
- PCI Interface
- 32-bit PCI 2.1, 33 MHz
- Form Factor
- Single-slot 3U CompactPCI, conduction-cooled
About
The S940 is Aitech’s radiation-tolerant digital I/O board for spacecraft attitude determination and control system integration. It provides a comprehensive suite of digital interfaces specifically selected to support standard spacecraft sensors and actuators: 12 RS-422 output channels, 4 RS-422 input channels, 2 RS-232 UART ports, 3 H-bridge torque rod interfaces rated at 2A, and 2 opto-isolated discrete output drivers.
The board’s interface suite directly supports Space Integrated GPS/INS (SIGI) navigation sensors, torque rods, solar array drive electronics, reaction wheel assemblies, rotary switches, and UART-based payload devices — covering the majority of spacecraft ADCS peripheral interfaces in a single board. Triple-voted buffered memory is applied to serial interface data, providing single event upset mitigation in the communication data path.
Power consumption is less than 14 watts nominal at full I/O load, and the board interfaces via a 32-bit PCI 2.1 compliant CompactPCI bus at 33 MHz in a single-slot conduction-cooled 3U form factor.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
