The Astronics/EADS/Racal 1260-22 is a C-size VXIbus high-power switch module delivering 40 SPST channels rated for up to 250 VAC/VDC and 20 A per channel. Designed for automated test systems requiring high-current source switching and routing, the module reconfigures as five 4×1 plus ten 2×1 multiplexer configurations with internal jumper provisions for 1×2 and 1×4 arrangements. Switching time is 300 kHz bandwidth (-3 dB), 50 dB isolation, and <-70 dB crosstalk. Maximum switching power reaches 4800 VA per channel (AC) and 600 W per channel (DC). The module features a 30-pin Positronic connector interface, emergency reset provision, and optional 01T messaging/register-based control with VXIplug&play support for LabVIEW and LabWindows/CVI environments. MTBF is 400,255 hours with operating temperature range of 0°C to +55°C.
## Technical Specifications
**Electrical Performance**
• Maximum switching voltage: 250 VAC, 250 VDC
• Maximum switching current: 20 A AC, 20 A DC
• Maximum switching power: 4800 VA per channel (AC), 600 W per channel (DC)
• Minimum switching power: 1 A AC at 12 VAC, 1 A DC at 5 VDC
• Switching time: 300 kHz
• Insertion loss: 50 dB at 10 kHz
• Crosstalk: <-70 dB at 10 kHz
• Open channel capacitance: <250 pF
• Channel-to-chassis capacitance: <250 pF
**Physical & Environmental**
• Form factor: C-size, single-slot VXIbus module
• Weight: 4 lbs 3 oz (2.1 kg) base, 4 lbs 8 oz (2.2 kg) with Option 01T
• Operating temperature: 0°C to +55°C
• Storage temperature: -40°C to +71°C
• Humidity (non-condensing): 85% ±5% at <35°C
• Operating altitude: 10,000 ft
• Storage altitude: 15,000 ft
• Shock: 10 g, 11 ms, 1/2 sine wave
• Vibration (non-operating): 0.013 in pk-pk, 5 to 55 Hz
## Key Features
• 40 SPST channels with reconfigurable multiplexer topology
• Internal jumper configuration for 1×2 and 1×4 multiplexer arrangements
• Emergency reset interface for immediate channel opening
• Optional 01T interface with message-based and register-based control
• VXIplug&play support for Win32 API frameworks
• EN61010-1 safety certification
• EMC compliance: EN55011A emissions, IEC801-2/3/4 immunity
## Compatibility & Integration
• 30-pin Positronic front-panel connector
• VXIbus single-slot architecture
• LabVIEW and LabWindows/CVI driver support
• Optional 01 Smart Card installation capability
