Overview
The Allen-Bradley 871TM-DH4NP12-A2 is a tubular inductive proximity sensor designed for reliable object detection in industrial control systems. Operating at 10-30VDC with a 200mA load current rating, this sensor provides consistent performance in manufacturing, packaging, and material handling environments. The unshielded design offers a 4mm sensing distance, making it suitable for applications requiring compact installation and fast response times.
Key Features
- Normally open (N.O.) source output configuration
- Unshielded inductive sensing technology with 4mm detection range
- 12mm tubular stainless steel housing for durability and corrosion resistance
- Male pin connector for reliable electrical connection
- Built-in protection against short circuit, overload, transient noise, and reverse polarity
- Compact form factor for space-constrained mounting applications
Technical Specifications
The 871TM-DH4NP12-A2 delivers predictable performance across standard industrial voltage ranges and load requirements:
- Operating Voltage: 10-30VDC
- Load Current (Output): 200mA
- Sensing Distance: 4mm, unshielded
- Output Type: Normally Open (N.O.) Source
- Housing Material: Stainless Steel
- Housing Diameter: 12mm tubular
- Connection: Male pin/wire connection
- Detection Technology: Inductive
Typical Applications
This sensor excels in high-volume production environments where consistent object detection is critical. Common applications include:
- Conveyor system position sensing and part counting
- Assembly line object presence detection
- Packaging machinery fill-level monitoring
- Automated material handling position feedback
- Metal part detection in industrial machinery
- Production line speed and synchronization control
Compatibility & Replacements
Compatible With
- Allen-Bradley ControlLogix and CompactLogix platforms
- Rockwell Automation Studio 5000 engineering environment
- Standard industrial 10-30VDC PLC I/O modules
- Any 200mA-rated discrete input channel (NPN/source logic)
- Traditional relay logic and hardwired control systems
Replaces / Drop-In Replacement For
- Direct replacement for other 871TM-DH4NP12 revision levels
- Compatible footprint with legacy 871T series tubular sensors
- Pin-compatible with standard 12mm tubular proximity sensors using N.O. source output
Works With
- Rockwell Automation controllers (ControlLogix, CompactLogix, MicroLogix)
- Studio 5000 Logix Designer programming environment
- Discrete 24VDC input modules across major PLC platforms
- Standard industrial automation networks (Ethernet/IP, DeviceNet where gateway-enabled)
- Both AC and DC powered control systems supporting 10-30VDC logic levels
