The Astronics/EADS/Racal 1261AM is a 13-slot C-Size VXI mainframe engineered for high-performance instrumentation and data acquisition systems requiring medium power distribution and advanced thermal management. Fully compliant with VXIbus specification Rev. 2.0 and VXI specification B.7.2.3, this platform delivers 500 W of usable power to support diverse module configurations in demanding test environments.
## Technical Specifications
• **Slot Configuration:** 13-slot C-Size VXI mainframe
• **VXIbus Compliance:** Rev. 2.0; VXI specification B.7.2.3
• **Input Voltage:** 115 Vrms ±10%
• **Input Frequency:** 47 Hz to 63 Hz
• **Total Usable Power:** 500 W
• **Maximum Power Consumption:** 1130 W (power supply)
• **Operating Temperature:** 0 °C to +55 °C
• **Operating Relative Humidity:** Up to 95% at up to 30 °C rise; up to 45% at +55 °C
• **Operating Altitude:** 5,000 ft (4570 m)
• **Non-operating Altitude:** 40,000 ft (12,190 m)
• **Acoustic Noise:** 56 dBA (fan speed control set to low)
## Key Features
• Advanced power supply with minimal ripple and noise; direct backplane connection
• Independent power supply and fan assemblies
• Pressurized plenum cooling system with molded card guides for optimized airflow distribution
• Snap-on slot covers divert airflow from unused positions
• Fault-tolerant three-fan cooling assembly with rear-pluggable design
• Variable-speed fan control adjusts based on worst-case slot temperature rise (with system monitor)
• Standard Monitor System (SMS) independently powered; checks VXIbus voltages, currents, airflow, and temperature against factory limits
• Enhanced Monitoring System (EMS) option adds VXIbus and RS-232 interactivity with user-defined limits and out-of-limit interrupts
• Optional inter-module shields (Option 52) reduce radiated noise between modules
• Optional backplane connector shrouds (Option 51) minimize backplane radiated noise
• Bi-color LED annunciators indicate system status
## Electromagnetic Compatibility
• FCC 47 CFR Part 15 Class B; EN 50081-1, EN 50082-1, EN 55011 Class B
• Class A emissions available with Option 53
## Typical Applications
Defense and aerospace testing, industrial data acquisition systems, automated measurement platforms, and distributed instrumentation networks requiring modular expansion and fault-tolerant operation.
