Description
Allen-Bradley 871F-D70NP50-D4 operates as a heavy-duty, long-range flat pack inductive proximity sensor. Designed for material handling, automotive assembly lines, and heavy machining centers, this rectangular sensor detects ferrous and non-ferrous metallic targets without making physical contact. Its flat-profile housing allows for installation in tight spaces where standard cylindrical barrel sensors simply will not fit.
Are you fixing a downed conveyor station or updating a weld-line sensing array? We maintain immediate inventory for this precise flat pack proximity sensor configuration.
- Availability: In Stock
- Lead Time: 1 to 2 business days for rapid worldwide air delivery
- Condition: New Original in Factory Box
- Warranty: 12-Month Industrial Warranty
- Pricing Note: The pricing listed across our platform serves as a general industry reference. Spot market pricing fluctuates based on manufacturer allocation cycles, global raw material costs, and real-time shipping demands. Reach out to our logistics desk to get a firm, binding quote.
Technical Specifications and Hardware Architecture
In field deployments across high-impact stamping and assembly cells, our automation engineers observed that the structural plastic housing resists common industrial cutting fluids and synthetic lubricants—though your mileage may vary depending on direct exposure to high-pressure washdown sprays. The sensor face can be rotated into multiple positions during mounting to change the sensing direction relative to the bracket.
Core Sensor Parameters
| Parameter | Value |
| Model Number | 871F-D70NP50-D4 |
| Brand / Family | Allen-Bradley / Rockwell Automation |
| Sensing Distance | 50 mm (1.97 inches) nominal |
| Mounting Style | Non-flush (requires clear metal-free zone around the face) |
| Output Configuration | NPN Complementary (Both Normally Open and Normally Closed) |
| Operating Voltage | 10 to 60 V DC |
| Maximum Load Current | 200 mA |
| Switching Frequency | 50 Hz |
| Connection Type | 4-pin micro quick-disconnect (M12 connector) |
| Enclosure Rating | IP67 |
Well, technically the sensor provides an extended 50 mm sensing range, but only if your target is made of standard mild steel. If you are tracking aluminum or copper targets, you must apply the manufacturer’s specified reduction factors (typically around 0.40 for aluminum) to prevent intermittent target dropouts. Do not overlook this correction factor when setting up mixed-material container lines.
Wiring Pinout and Terminal Configuration
Connecting the 871F-D70NP50-D4 to a centralized I/O block or PLC input card requires matching the standard M12 micro-style pinout configuration. The unit features dual complementary outputs, which means it switches both an NO and an NC circuit simultaneously.
[ M12 Connector Pinout Face ]
(2) (3)
* *
* *
(1) (4) - Pin 1 (Brown): +V DC Power Supply (10 to 60 V DC)
- Pin 2 (White): NPN Normally Closed (NC) Output
- Pin 3 (Blue): −V DC Common Ground
- Pin 4 (Black): NPN Normally Open (NO) Output
When routing the sensor cable through your flexible conduit tracks, make sure the coupling nut on the M12 mating cable is fully finger-tightened against the sensor body interface. If the rubber O-ring seal inside the cable connector is pinched or twisted during installation, ambient coolant mist can seep into the pin housing and cause a false output trigger.
Cross-Border Shipping, Logistics, and Trade Compliance
Moving specialized manufacturing components across international borders demands comprehensive regulatory tracking to bypass customs clearance delays. Because these sensors are critical components in heavy machine tool systems, customs officers closely inspect cross-border manifests.
Industrial Crating & Environmental Safeguards
Every 871F-D70NP50-D4 sensor is retained within its original individual packaging shell to shield the internal solid-state potting from external impact shock. For overseas air transport, units are grouped into structural, double-walled corrugated outer shipping boxes lined with anti-static dunnage matrix.
Global Trade Documentation Pack
Our automated logistics network prevents terminal delays by filing accurate cargo data sets directly with your specified broker:
- Harmonized Tariff Schedule (HS Code): 8536.50.9065 (Other electrical switches, including proximity switches)
- Export Control Classification Number (ECCN): EAR99
- Standard Forms Included: Electronic commercial invoices, packing lists with itemized gross weights, and official Manufacturer Country of Origin declarations.
Frequently Asked Questions
Can this flat pack sensor be embedded directly into a steel machine frame?
No. Because this sensor features a non-flush configuration with a large 50 mm sensing distance, embedding it directly into a ferrous metal frame will cause the sensor to self-trigger. You must maintain the minimum metal-free surrounding clearance zone specified in the Allen-Bradley instruction sheet.
What is the advantage of a complementary NPN output configuration?
The complementary output gives you both Normally Open (NO) and Normally Closed (NC) contacts on the same sensor device. This is highly useful for safety monitoring or line breaks, allowing one wire to signal your PLC that a target is present, while the other wire provides a continuous loop-check signal to confirm the sensor is powered and connected.
