Description
SCXI-1326 NI High-Voltage Terminal Block
Product Dimensions:
Product Description
The NI SCXI‑1326 (Part Number: 777687‑26) is a shielded high‑voltage screw terminal block designed for NI’s Signal Conditioning eXtensions for Instrumentation (SCXI) platform. It serves as a rugged, front‑mount interface between SCXI signal conditioning modules (e.g., SCXI‑1162, SCXI‑1162HV, SCXI‑1163, SCXI‑1163R) and field‑wired sensors/actuators, simplifying large‑channel‑count signal connections while ensuring safety and noise immunity[6][9]. As a non‑conditioning accessory, it provides secure, isolated wiring termination to protect precision SCXI hardware and reduce electromagnetic interference (EMI)[7][22].
2. Technical Parameters
| Parameter | Specification |
|---|---|
| Model / Part No. | SCXI‑1326 / 777687‑26 |
| Product Type | High‑Voltage Screw Terminal Block (SCXI Accessory) |
| Terminal Configuration | 48 screw terminals (8 banks × 6 terminals per bank, isolated)[6][9] |
| Max. Working Voltage | 300 Vrms (CAT II)[6][9] |
| Common‑Mode Isolation | 300 Vrms (bank‑to‑bank, bank‑to‑earth)[15] |
| Wiring Interface | Screw terminals (Phoenix Contact style); strain‑relief clamp for secure cabling[5][22] |
| Conductor Size | 0.2–2.5 mm² (24–14 AWG); torque: 0.5 Nm |
| Mounting | Front‑mount to SCXI module front connector[6][9] |
| Operating Temp. | 0–55 °C (32–131 °F)[4] |
| Storage Temp. | -20–60 °C (-4–140 °F) |
| Relative Humidity | 5–90% (non‑condensing)[4] |
| Dimensions | Approx. 12.7 × 7.62 × 11.18 cm (5 × 3 × 4.4 in.) |
| Weight | Approx. 0.45 kg (0.99 lb) |
| Certifications | CE, UL, IEC 61010 |
| Warranty | 3 years |
3. Product Advantages
- High‑Voltage Safety & Isolation: Rated to 300 Vrms (CAT II) with 300 Vrms bank isolation, making it ideal for high‑voltage digital I/O, temperature, and voltage applications[6][9].
- Shielded Design: Integral shielding minimizes EMI, ensuring signal integrity in noisy industrial environments[6][23].
- High‑Density Termination: 48 screw terminals (8 isolated banks) enable efficient large‑channel‑count connections, reducing panel space and wiring complexity[6][9].
- Secure Field Wiring: Screw terminals with strain‑relief clamps provide reliable mechanical and electrical connection, reducing loose‑wire failures[22].
- Module Compatibility: Directly mates with SCXI‑1162, SCXI‑1162HV, SCXI‑1163, and SCXI‑1163R modules for seamless system integration[6][9].
- User‑Friendly Operation: Front‑mount design simplifies installation, wiring, and maintenance without disrupting the SCXI chassis[23].
- Industrial Reliability: Wide operating temperature range and robust construction suit harsh industrial settings[4].
4. Precautions
- Power‑Off Wiring: Always power down the system before connecting/disconnecting field signals to avoid electric shock or hardware damage.
- Voltage Compliance: Never exceed 300 Vrms per terminal; overvoltage will damage connected SCXI modules[6][9].
- Isolation Adherence: Maintain bank isolation; do not cross‑wire isolated banks to prevent ground loops or short circuits[15].
- Conductor Sizing: Use 0.2–2.5 mm² (24–14 AWG) conductors and tighten screws to 0.5 Nm for reliable contact.
- EMI Mitigation: Ensure proper grounding of the terminal block shield and strain‑relief tab (for ≥42 Vrms) to meet safety standards and reduce noise.
- Environmental Limits: Operate within 0–55 °C and 5–90% RH (non‑condensing); avoid corrosive atmospheres or direct moisture[4].
- Module Matching: Use only with compatible SCXI modules (1162/1162HV/1163/1163R); incorrect pairing may cause measurement errors or damage[6].
- Safety Grounding: For high‑voltage applications, connect the safety earth ground to the strain‑relief tab to comply with UL 1244.
5. Product Applications
- Industrial Automation: High‑voltage digital I/O for PLCs, machine tools, robotics, and VFD‑driven systems; large‑channel temperature/voltage monitoring in automotive, metalworking, and packaging lines[9][23].
- Power & Energy: UPS systems, battery banks, renewable energy (solar/wind) inverters, and substation equipment monitoring; insulation and switch‑state monitoring in IT power systems[10].
- Test & Measurement: Automated test stands for electronic components, industrial controls, and aerospace systems; multi‑channel data acquisition in R&D labs[9][23].
- Building & Infrastructure: HVAC, fire safety, and emergency power systems in commercial buildings, airports, and rail facilities; large‑sensor‑array monitoring for structural integrity[10].
- Marine & Offshore: Shipboard and offshore platform systems (compliant with marine safety standards); harsh‑environment sensor wiring for propulsion and process control.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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