Allen Bradley 1747-SCNR ControlNet Scanner Module

Core Functionalities of the Allen-Bradley 1747-SCNR

Description

The Allen-Bradley 1747-SCNR SLC ControlNet Scanner Module serves as the interface between ControlNet devices and the SLC processor. This module communicates with ControlNet devices over a network. It can communicate with the processor via M1/M0 file transfers and Discrete I/O (DIO). The 1747-SCNR also complies with several electromagnetic compatibility (EMC) standards. The cable has been tested according to EN 50082-2 EMC / General Immunity Standard Part 2 - Industrial Environments. Connecting or disconnecting the ControlNet cable while it is powered on may generate an electric arc. This could potentially cause an explosion if installed in a hazardous location. Always disconnect the power and ensure the area is safe before continuing operation. The Allen-Bradley 1747-SCNR has a maximum backplane current of 900 mA at 5V DC. The 1747-SCNR operates from 0 to 60 degrees Celsius. The operating temperature range is 32-140 degrees Fahrenheit. The storage temperature range is -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). The non-operating shock resistance is 50g.

The ControlNet address of the 1747-SCNR can be set to any value between 01 and 99, with a default value of 00. This default address is invalid, meaning the module's default address needs to be modified. The ControlNet address can be set via the rotary switch located on top of the scanner.

When installing this module, ensure the SLC 500 chassis is powered off. Never install this module while it is powered on, as this may generate an electric arc, damaging the SLC500 electronic bus and nearby SLC500 modules. Furthermore, never touch the 1747-SCNR's electronic circuitry.

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Technical Q&A

Question1. What functional role does the Allen-Bradley 1747-SCNR play in the SLC 500 architecture?

Answer: The Allen-Bradley 1747-SCNR serves as a dedicated ControlNet scanner interface, supporting deterministic data exchange between ControlNet field devices and the SLC 500 processor. It effectively coordinates communication through planned and unplanned

messaging, ensuring synchronized control between distributed automation systems.

Question2. What communication interfaces does the Allen-Bradley 1747-SCNR integrate? How do they support redundancy?

Answer: The Allen-Bradley 1747-SCNR features dual ControlNet ports (Channel A and Channel B) supporting redundant media configurations. This dual-channel topology enhances network resilience, minimizes downtime, and supports fault-tolerant industrial communication infrastructure.

Question3. What environmental and operational tolerances contribute to the robustness of the Allen-Bradley 1747-SCNR?

Answer: The Allen-Bradley 1747-SCNR is designed for industrial-grade durability, supporting operating temperatures from 0 to 60°C and storage conditions from -40 to 85°C. It can withstand relative humidity from 5% to 95% (without condensation) and has shock resistance of up to 30 g (working condition) and 50 g (non-working condition).

Question4. What installation precautions must be taken when deploying the Allen-Bradley 1747-SCNR?

Answer: When installing the Allen-Bradley 1747-SCNR, the power supply to the SLC 500 chassis must be completely disconnected to prevent arcing. Furthermore, direct contact with the internal circuitry should be strictly avoided to prevent electrostatic discharge

or physical damage.

Question5. In which industrial scenarios does the Allen-Bradley 1747-SCNR demonstrate optimal performance?

Answer: The Allen-Bradley 1747-SCNR excels in distributed automation systems, process control environments, and high-reliability manufacturing networks, where deterministic communication and synchronized device interaction are critical.

Question6. Why should buyers consider sourcing Allen-Bradley 1747-SCNR from AMIKON LIMITED?

Answer: Sourcing Allen-Bradley 1747-SCNR from AMIKON LIMITED ensures you receive genuine components, competitive pricing, global logistics support, and rapid-response technical service, making it a strategic choice for mission-critical automation projects.

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