Application & Topology
Channel Topology: 16 independent SPDT (Form C) latching relays. Each channel includes a normally open (NO) contact, normally closed (NC) contact, and common (COM) terminal. It maintains its state upon power‑up and retains state through power loss.Control Method: Driven by a DAQ/switch controller via the SCXI bus, supporting independent channel programming and batch switching.
Typical Applications: Signal gating, load switching, multiplexing, safety interlocking, and analog/digital signal routing.
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Electrical Specifications
1. Switching & Carry Capability
| Parameter | Specification |
|---|---|
| Maximum Switching Voltage | 250 V CAT II (channel-to-ground) |
| Maximum Switching / Continuous Current | 2 A per channel |
| Maximum Switching Power | 500 VA; 60 W at 30 VDC; 30 W above 30 VDC |
| Minimum Switching Capacity | 100 mVDC @ 10 mA |
2. Contact & Dynamic Characteristics
- On-resistance: < 75 mΩ initial; > 1 Ω at end of life (including contact and trace resistance)
- Thermal EMF (typical): < 3 μV, suitable for low-level signal switching
- Relay operate time: 14 ms; additional settling time may be required in some applications
- Contact material: Gold-over-silver alloy, offering low contact resistance, oxidation resistance, and improved low-level signal reliability
3. Relay Life
- Mechanical life: 5×10 operations
- Electrical life:
- 30 VDC / 2 A: 2×10 operations
- 250 VAC / 2 A: 1×10 operations
Physical & Environmental Specifications
- Relay type: Electromechanical, latching
- I/O connector: 48‑pin DIN C male
- Dimensions (L × H × W): 19.8 cm × 3 cm × 17.3 cm (7.8 in × 1.2 in × 6.7 in)
- Weight: 675 g (1 lb 8 oz)
- Operating temperature: 0 °C to 50 °C; Storage: ‑20 °C to 70 °C
- Humidity: 0–85% non-condensing; Maximum altitude: 2000 m; For indoor use only
Accessories & Compatibility
- Recommended terminal block: SCXI‑1324 (part number 777687‑24) for convenient field wiring and signal management
- Compatible platforms: SCXI chassis, NI DAQ / switch controllers, LabVIEW, NI‑Switches driver, and Switch Executive management software
Applications
- Automated Test Equipment (ATE)：Multi-channel sensor / excitation source switching, product functional testing.
- Industrial Automation：Valve / pump / motor control, safety interlock circuits, condition monitoring and signal routing.
- Data Acquisition：Multiplexing of multiple analog / digital signals to reduce front-end channel usage.
- Laboratory Measurement：Signal routing, load switching, parameter calibration and reliability endurance testing.
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