Description
NI SCXI-1163R – 32‑Channel Isolated Digital Input Module for 24 V Industrial Signals
The NI SCXI-1163R is a 32‑channel, optically isolated digital input module designed for SCXI systems. From my experience, it’s the piece you add when you need clean, reliable 24 V (typical 5–30 VDC) digital sensing from the plant floor into your NI DAQ setup—limit switches, proximity sensors, pushbuttons, and dry-contact signals. One thing I appreciate is the isolation; it usually keeps ground loops and electrical noise from creeping into the measurement backplane.
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than one month at the latest
- Payment: 50% advance payment; full payment before delivery
- Express options: FedEx, UPS, DHL
Key Features
- 32 optically isolated digital inputs – Each channel is isolated to help protect the DAQ system and reduce noise coupling.
- Industrial voltage compatibility – Works with typical 24 VDC field signals; many setups use 5–30 VDC ranges.
- Active-low/active-high flexibility – The “R” variant is commonly chosen when reversed or active‑low logic is preferred in the control scheme.
- SCXI backplane integration – Data is routed through the SCXI chassis to your NI DAQ device for streamlined wiring and system expansion.
- Field-wiring friendly – Pairs with SCXI screw-terminal accessories for neat, maintainable installations.
- Channel density – 32 channels in a single SCXI slot helps consolidate cabinets and simplify panel layouts.
Technical Specifications
| Brand / Model | NI (National Instruments) / SCXI-1163R |
| HS Code | 853890 (Parts for electrical control/switching apparatus) |
| Channels | 32 isolated digital input channels |
| Signal Input/Output Types | Optically isolated digital inputs; nominal 24 VDC, typically 5–30 VDC compatible; supports active‑low/active‑high logic depending on wiring |
| Communication Interfaces | Via SCXI backplane to NI DAQ (PCI/PXI/USB) through compatible SCXI chassis |
| Power Requirements | Powered by the SCXI chassis backplane; no external supply required for the module itself |
| Installation Method | Single-slot SCXI plug‑in module; field wiring via matching SCXI screw‑terminal blocks and shielded cables |
| Operating Temperature | Typically 0 to 50 °C (indoor control cabinet use) |
| Dimensions & Weight | Standard SCXI single‑slot form factor |
| Isolation | Per‑channel optical isolation (for noise and ground‑loop mitigation) |
Application Fields
- Factory automation: reading 24 VDC sensors (limit/prox, photoeyes), E‑stop loops (monitoring only), and machine status lines.
- Process skids: capturing valve open/close indications, pump run signals, and panel switch positions.
- Test stands: discrete interlock monitoring and fixture presence detection integrated into NI DAQ systems.
- Utilities and facilities: door contacts, flow/level switch states, and alarm summaries into SCADA/DAQ.
You might notice that the module fits neatly when teams already have PCI or PXI DAQ cards; the SCXI chassis becomes the clean front-end for field wiring. A maintenance supervisor told us they swapped several DIN rail input blocks for a single SCXI‑1163R and cut troubleshooting time because everything terminated at one labeled terminal block.
Advantages & Value
- Reliability – Optical isolation and robust SCXI construction tend to handle industrial noise better than standard PC I/O.
- Compatibility – Integrates with NI DAQ software stacks (LabVIEW, DAQmx) and typical 24 VDC controls hardware.
- Cost efficiency – 32 channels per slot usually means fewer chassis slots and fewer cables, which lowers panel and labor costs.
- Scalability – Add more SCXI modules as your I/O grows without redesigning the whole cabinet.
- Support – We provide pre‑shipment testing and configuration guidance, which seems to reduce commissioning hiccups.
Installation & Maintenance
- Cabinet & environment – Install in a grounded control cabinet; keep ambient within 0–50 °C and allow frontal ventilation for the SCXI chassis.
- Wiring – Use shielded cables to the SCXI terminal block; separate high‑voltage or motor drives from signal wiring. Confirm sensor type (PNP/NPN) and wire for the desired active‑low/active‑high behavior.
- Power & grounding – Power is from the SCXI backplane; maintain a single‑point ground reference and check cabinet earth continuity.
- Safety – De‑energize field circuits before servicing. The inputs are for signal sensing; do not use as safety‑rated control outputs.
- Routine maintenance – Quarterly dust removal with dry air; re‑tighten terminal screws; verify channel function via a quick DI loopback test. Keep NI driver/firmware up to date where applicable.
Quality & Certifications
- Typical conformity: CE and RoHS for electronic modules of this class; many SCXI modules also follow UL safety guidelines.
- Manufacturer quality systems generally align with ISO standards used in instrumentation manufacturing.
- Warranty: 365 days replacement/repair policy as noted above.
Recommended Supporting Components
- SCXI chassis (e.g., SCXI‑1000/SCXI‑1001) and appropriate power supply
- NI DAQ device with SCXI support (PCI, PXI, or USB interface) and matching cable
- SCXI screw‑terminal block and shielded I/O cable for clean field wiring and labeling
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