The National Instruments SCXI-1166 is a 32-channel relay switch module for SCXI chassis-based signal routing and control. It provides independent single-pole double-throw (SPDT) non-latching electromechanical relays with gold-clad silver alloy contacts, delivering very low on-resistance and minimal thermal offset. The module handles switching at 2 A with 30 VAC/30 VDC maximum, carries up to 5 A per channel, and withstands 150 VDC / 125 VAC with 800 V impulse voltage rating. Operating at up to 115 operations per second with a 32,000-step deterministic scan list and ≥70 MHz bandwidth, the SCXI-1166 serves automated test equipment, industrial control, and general-purpose switching applications.
Technical Specifications
Relay Configuration
• 32 independent SPDT (Form C) non-latching electromechanical relays
• Gold-clad silver alloy contacts
• Very low on-resistance; low thermal offset
Electrical Performance
• Switching capacity: 2 A at 30 VAC / 30 VDC maximum
• Carry current: 5 A per channel
• Maximum voltage: 150 VDC / 125 VAC
• Impulse voltage withstand: 800 V
• Maximum power: 60 W, 62.5 VA
• Cycle speed: up to 115 operations per second
• Scan list: 32,000-step for deterministic scanning
• Bandwidth (–3 dB): ≥70 MHz
Power Requirements
• 6.3 W at ±18.5 V
• 200 mW at 5 V
Connectors
• Two 62-pin D-Sub connectors
• Compatible with NI SCXI-1366 Terminal Block (screw terminals for all 32 relays)
Physical & Environmental
• Dimensions: 3.0 × 17.3 × 19.6 cm (1.2 × 6.7 × 7.6 in.)
• Weight: approximately 10 oz
• Operating temperature: 0 °C to 50 °C
• Storage temperature: –20 °C to 70 °C
• Humidity: 5% to 85% non-condensing
• CE compliance
– Compatibility & Integration
Designed for SCXI chassis systems (SCXI-1001 compatible). Supports NI-SWITCH driver, Switch Executive, LabVIEW, LabVIEW Real-Time Module, LabWindows/CVI, Measurement Studio, Visual Basic, and C/C++. Compatible with Windows 2000/NT/XP.
Safety Note: Low-voltage circuits (42.4 V pk / 60 VDC).
