NI SCXI-1129 High-Density Multiconfiguration Matrix

The NI SCXI-1129 is a high-density multiconfiguration matrix switching module for the SCXI platform, delivering 256 crosspoints in a single slot. This electromechanical relay matrix supports multiple topology configurations—from 4 × 64 down to four independent 4 × 16 matrices—enabling flexible signal routing for automated test systems. Gold/gold-clad silver contacts handle up to 1 A per channel with 30 W switching power and 2 A carry current. Initial DC path resistance remains below 1 Ω, with thermal EMF under 9 μV for precision measurements.

– Technical Specifications

Switching Matrix
• 256 crosspoints, high-density configuration
• Topologies: 4 × 64, 2 × 32, 2 × 8 × 16, 4 × 4 × 16, or single 16 × 16 (2-wire)
• Maximum switching power: 30 W per channel (37.5 VA)
• Maximum switching current: 1 A per channel
• Maximum carry current: 2 A per channel
• Module current limit: 5 A
• DC path resistance: < 1 Ω initial, ≥ 2 Ω end of life
• Thermal EMF: < 9 μV
• Impulse voltage withstand: 800 V
• Signal voltage rating: ≤ 150 V

Dynamic Performance
• Relay operate/release time: 4 ms maximum at 20 °C
• Maximum scan rate: 100 crosspoints/s
• Relay life: 5 × 10⁷ mechanical cycles, 1 × 10⁵ electrical cycles at maximum load
• Channel-to-channel isolation (50 Ω): 80 dB @ 10 kHz, 65 dB @ 100 kHz, 50 dB @ 1 MHz

Triggering
• Input sources: SCXI trigger lines 0–7, rear connector, front panel (minimum pulse width 150 ns)
• Output destinations: SCXI trigger lines 0–7, front panel (1 µs pulse width)

Power & Environment
• Power requirements: 6.3 W @ ±18.5 V, 200 mW @ 5 V
• Operating temperature: 0 °C to 55 °C
• Operating humidity: 10% to 90% noncondensing
• Operating vibration: 5 Hz to 500 Hz, 0.3 grms
• Dimensions: 7.8 × 1.2 × 6.8 in. (19.8 × 3.0 × 17.3 cm)
• Weight: 1 lb (725 g)

– Key Features

• Multiconfiguration topology for test scalability
• Expandable via matrix expansion plugs or high-voltage analog bus adapter
• Latching and nonlatching relay options
• Fast switching: 4 ms operate/release time
• Low contact resistance and thermal EMF for precision analog work
• Compact single-slot SCXI form factor

– Typical Applications

Automated test systems requiring high-channel-count signal routing, low-voltage precision measurements, RF/analog signal switching, and flexible matrix configurations within constrained physical space.

– Compatibility & Integration

Integrates directly into SCXI platforms. Trigger I/O via SCXI lines 0–7 or front/rear connectors. Matrix expansion supported through dedicated plugs, cables, and high-voltage analog bus adapters.