Overview
The Allen-Bradley 871TM-DH15NP30-D4 is a rugged 3-wire DC inductive proximity sensor designed for demanding industrial applications. Featuring a 30mm tubular barrel with stainless steel metal face, this sensor detects ferrous and non-ferrous metal objects at a 15mm sensing distance. The PNP (source/normally open) output connects via Micro Quick-Disconnect (QD), making it ideal for washdown environments, food processing, and corrosive factory floors where standard sensors fail.
Key Features
- Stainless steel construction — metal face and barrel resist corrosion, impact, and abrasion in harsh environments
- Full mechanical seals and epoxy encapsulation — rated IP67 and IP69K with 1200 psi washdown rating
- 15mm sensing distance — reliable non-flush detection of metal targets
- PNP normally open output — 25 mA load current, 10–30V DC supply
- Built-in protection — false pulse suppression, transient noise filtering, reverse polarity, short-circuit, and overload protection
- Micro QD connection — quick-change connectors reduce downtime during sensor swaps
Technical Specifications
Key performance parameters for integration into control systems:
Typical Applications
The 871TM series excels in environments where ordinary sensors cannot survive. Common installations include:
- Food and beverage processing (high-pressure washdown, wet environments)
- Automotive assembly (parts detection, conveyor control)
- Chemical and pharmaceutical manufacturing (corrosive vapor exposure)
- Metal fabrication (chip and debris laden air)
- Packaging and material handling systems
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix, ControlLogix, and MicroLogix controllers
- Siemens SIMATIC S7 series via standard analog/digital I/O modules
- Omron and Mitsubishi PLCs with DC input cards (10–30V DC)
- Industrial DC distributed control systems and fieldbus gateways
- Standard 24 VDC automation power supplies
Replaces / Drop-In Replacement For
- 871TM-DH15NP30-A2 (older connector variant)
- 871TM-DH15NP30-H2 (legacy revision)
- 871TM-DH15NP30-N4 (alternate output type)
- Similar 30mm barrel inductive sensors from Phoenix Contact, Turck, and ifm when operating voltage (10–30 VDC) and output logic match
Works With
- Studio 5000 Logix Designer for I/O configuration and diagnostics
- TIA Portal (Siemens) with appropriate hardware module mappings
- Standard 3-wire DC sensor harnesses and Micro QD cordsets (889N–F4AFC–6F recommended)
- EtherNet/IP gateways via analog/digital input modules
- PROFINET and standard industrial fieldbus bridges for data integration
