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Allen Bradley 845 Encoders 845A-SJZ3DN6DW

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845A-SJZ3DN6DW

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The 845A-SJZ3DN6DW is an absolute optical encoder designed by Allen Bradley, belonging to the 845 Encoders series. It operates on a power supply of 12-24 V DC and boasts a resolution of 8 bits in Gray code. This encoder is capable of single-turn measurements.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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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 845A-SJZ3DN6DW

ManufacturerAllen Bradley
Product TypeAbsolute Optical Encoder
Product Line845 Encoders
Part Number845A-SJZ3DN6DW
Weight2.44 lbs (1.11 kg)
UPC662074313069
Turn TypeSingle-turn
Resolution / Bits8-bit Gray
Power Supply12‑24 V DC
Mounting StyleSquare flange mount
Shaft3/8 in shaft
EnclosureNEMA Type 4
Shaft Starting Torque2.5 N·cm
Maximum Shaft Speed6000 RPM
Moment of Inertia15 g·cm²
IsolationOpto-electronic isolation
IP RatingIP65 / IP66
Operating Temperature–20 °C to +85 °C
Storage Temperature–40 °C to +100 °C
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The Allen Bradley 845A-SJZ3DN6DW is classified as an absolute optical encoder, equipped with numerous features that enhance its functionality in precise motion control applications. It supports a power input range of 12 to 24 V DC and utilizes an 8-bit Gray code for resolution. This encoder executes single-turn operations, making it ideal for applications requiring precise angular position data.

Designed for robustness, the 845A-SJZ3DN6DW incorporates a square flange mounting style, facilitating straightforward installation. Additionally, it is fitted with a 3/8 inch shaft providing compatibility with various mechanical configurations.

This encoder operates effectively at shaft speeds up to 6000 RPM, while requiring a starting torque of just 2.5 N·cm. It maintains a moment of inertia of 15 g·cm², which contributes to its performance consistency. To ensure electrical separation, the device utilizes opto-electronic isolation. Furthermore, its NEMA Type 4 rating alongside IP65 and IP66 ratings means that it’s built to withstand environmental factors such as dust and moisture.

With an operating temperature range spanning from -20 °C to +85 °C, this encoder adapts to varied conditions. It can also be safely stored in temperatures ranging from -40 °C to +100 °C, which highlights its adaptability and robustness in different operational scenarios.