The Astronics/EADS/Racal 1260-117 is a high-density SPDT plug-in switch card engineered for signal routing in test and measurement systems. This electromechanical relay card delivers 52 or 20 channels of Form C switching, optimizing space utilization within VXI chassis while maintaining interchangeable inputs and outputs. Built on the Adapt-a-Switch™ platform, it integrates into VXI, GPIB/Ethernet, and LXI control architectures with VXIplug&play driver support for LabWindows/CVI and LabVIEW environments.
## Technical Specifications
**Switching Performance**
• Maximum switching voltage: 300 VDC or 300 VAC
• Maximum switching current: 2 ADC/AC (1 ADC/AC with IDC mating)
• Maximum switching power: 60 W, 125 VA
• Switching time: <3 ms including settling
• Mechanical rated operations: 1 × 10⁸ cycles
• Path resistance: 2 × 10⁹ Ω
• Thermal EMF: <10 μV
**RF/Frequency Characteristics**
• Bandwidth (-3 dB): 60 MHz
• Insertion loss at 300 kHz: <0.1 dB; at 1 MHz: <0.5 dB; at 10 MHz: 40 dB
• Crosstalk (50 Ω) at 100 kHz: <-45 dB; at 1 MHz: <-40 dB; at 10 MHz: <-35 dB
• Channel-to-chassis capacitance: <150 pF
**Power & Reliability**
• Power consumption: +5 VDC at 150 mA plus 30 mA per energized relay (750 mA maximum)
• MTBF (MIL-STD-217E): ≥822,885 hours
• MTTR: <5 minutes
## Key Features
• Electromechanical relay construction for cost-effective general-purpose switching
• Multiple channel configurations (20 or 52 SPDT channels) within single-slot footprint
• Standard plug-in form factor enables rapid field replacement
• Low path resistance and thermal EMF support precision measurement applications
## Environmental Operating Conditions
• Temperature: 0°C to 55°C
• Relative humidity: 5% to 95% RH non-condensing at ≤30°C
• Operating altitude: 10,000 ft
• Shock: 30 g peak, half-sine 11 ms pulse
• Random vibration: 5–500 Hz, 0.3 Grms
• Airflow requirement: 1.0 liter/sec
## Compatibility & Integration
The 1260-117/117A supports VXI (Option 01T), GPIB/Ethernet (1256), and LXI (1256L) control interfaces. Standards compliance includes EN61326:1997 +A1:1998 (Class A) for emissions/immunity and EN61010-1:1993 +A2:1995 for safety.
