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Allen Bradley Bulletin 872C 872C-D4NN12-E2

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872C-D4NN12-E2

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The 872C-D4NN12-E2, a part of Allen Bradley's Bulletin 872C series, is an inductive proximity switch capable of detecting objects without direct contact. It operates within a nominal sensing range of 4 mm (0.16 in) and has a barrel diameter of 12 mm (0.47 in).

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 872C-D4NN12-E2

ManufacturerAllen Bradley
Product TypeInductive Proximity Switch
Product LineBulletin 872C
Part Number872C-D4NN12-E2
Weight0.25 lbs (0.11 kg)
ShieldedNo
Output ConfigurationN.O (PNP/NPN)
Nominal Sensing Distance4 mm (0.16 in)
Barrel Diameter12 mm (0.47 in)
Load Current≤ 200 mA
Leakage Current≤ 20 µA
Operating Voltage10-30V DC
Voltage Drop< 1V
Switching Frequency≤ 2650 Hz
No-load Supply Current< 15 mA
Repeatability≤ 5%
Hysteresis5% typical
Protection TypeFalse pulse on power; Transient noise; Reverse polarity; Short circuit and overload
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The Allen Bradley 872C-D4NN12-E2 serves as an inductive proximity switch intended for use in various industrial applications. This component allows for the detection of metallic objects without mechanical contact, improving reliability and extending operational life due to the absence of wear and tear. Its nominal sensing distance is 4 mm (0.16 in), making it suitable for precise detection needs. The switch's barrel diameter measures 12 mm (0.47 in), ensuring compatibility with a range of mounting options.

It is important to note that this switch is not shielded. It operates with a normally-open (N.O) output configuration, which can be configured as either PNP or NPN. The device is designed to manage a load current of up to 200 mA while maintaining leakage current levels below 20 µA. The operating voltage varies between 10 and 30V DC, making it versatile enough for many applications. A minimal voltage drop of under 1V ensures efficient power usage, while the maximum switching frequency of 2650 Hz supports rapid operation.

The device draws less than 15 mA when no load is present, providing energy efficiency in operation. Its repeatability is rated at ≤ 5%, with a typical hysteresis of 5%, which contributes to consistent performance under various conditions.

Protection features include safeguards against false pulses on power, transient noise, reverse polarity, short circuits, and overloads, enhancing its reliability in demanding environments. Overall, the 872C-D4NN12-E2 is designed to deliver dependable operation while maintaining effective protection against common hazards found in industrial settings.