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The 1756-ENBT/A is an Ethernet industrial communication bridge module within the ControlLogix hardware product line, where the "/A" suffix denotes the Series A hardware version. The component utilizes a single-slot modular physical configuration that plugs directly into any available slot of a 1756 series I/O chassis via backplane metal contacts, establishing a physical connection between the backplane bus and external Ethernet networks. The front panel features a standard 8-pin RJ45 interface for connecting twisted-pair Ethernet cables, translating and converting chassis controller data into network packets structured under the Common Industrial Protocol and TCP/IP protocol frameworks.
Alphanumeric Display
Supports automatic physical IP address replacement technology
Dual-Message Data Processing Logic Integrated Within the Communication Module Hardware
The communication module draws its operating power directly from the 1756 chassis backplane, with a backplane current consumption rated at 700 mA at 5.1V DC. The front-facing RJ45 connection port supports 10/100 Mbps network transmission rates and includes an auto-negotiation function to match the physical-layer line speeds of industrial switches or control terminals. Regarding communication capacity, the module maintains strict, fixed connection thresholds, with internal hardware buffers accommodating up to 128 concurrent Common Industrial Protocol (CIP) connections and up to 64 concurrent TCP/IP connections. Beside the RJ45 cable interface, the front panel includes a set of physical status Light Emitting Diodes (LEDs), consisting of a LINK indicator, a NET indicator, and an OK status indicator dedicated to displaying backplane and network configuration states. The module uses an open-style, unsealed enclosure layout.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen Bradley 1756-ENBT/A Ethernet/IP network module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Automotive Assembly Plants
Routes implicit Class 1 real-time messaging between main controllers and distributed line components, coordinating pneumatic clamps, proximity switches, and robot transfer loops.
Thermal Power Plants
Manages the continuous network connection between rack controllers and remote FLEX I/O enclosures located near the boiler decks, handling high-density analog temperature readings.
Iron & Steel Smelting
Establishes communication links between master processors and remote I/O nodes, resisting electrical noise from massive nearby ladle crane induction systems.
Pulp & Paper Industrial Mills
Maintains constant backhaul of analog pressure and velocity data from field sensors to rack-mounted controllers, tracking process variations across production runs.
Cement & Aggregates Production
Forwards real-time sensor variables from dust-heavy kiln decks to main controller cabinets, keeping high-temperature processes stable.
Semiconductor & Electronics Packaging
Manages non-cyclic explicit configuration messages and cyclic inputs for HVAC systems, holding humidity and particle counts within specified limits.
The network connection volume must be rigidly verified because its concurrent CIP connections are physically capped at 64, beyond which communication drops will occur, and its standard messaging throughput is strictly limited to 5000 packets per second. This module is fitted with only 1 physical network port and does not support dual-port Device Level Ring topologies. Since it draws a 700 mA current from the 5.1V DC backplane, the rack power supply capacity must be calculated during configuration. Furthermore, as this legacy model is completely discontinued, routine firmware flashing in the field should be avoided, and migration plans to the newer 1756-EN2T modules should be established proactively.
The 1756-ENBT/A ControlLogix series Ethernet communication module delivers flexible networking capability with a 10/100 Mbps EtherNet/IP transmission rate. Featuring a 30V DC continuous insulation voltage rating, this open-enclosure hardware supports universal slot placement for rapid integration into any available chassis slot.
The 1756-ENBT/A is an EtherNet/IP communication bridge module within the A-B ControlLogix system, utilized to establish industrial Ethernet connections among controllers, I/O chassis, and other network devices.
On what hardware platform must the 1756-ENBT/A be installed to operate?
It must be plugged directly into a standard I/O chassis of the 1756 ControlLogix control system, drawing power from the backplane and establishing data interconnection with other modules.
How to properly connect and use the 1756-ENBT/A in an industrial site?
Secure it into any available slot of the chassis, insert a standard RJ45 industrial Ethernet twisted-pair cable into its front network port, and utilize software to configure its static IP address for industrial control network integration.
What physical role does the alpha-numeric display on the front panel of the 1756-ENBT/A play?
The 4-character scrolling display is utilized to show the current operational status of the module, the assigned static IP address, or specific hardware fault alarm codes in real time.
What message throughput limits can the 1756-ENBT/A handle within an industrial network topology?
When processing I/O control and explicit messaging, its standard packet processing threshold is typically limited to 5000 packets per second.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC 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. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company 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.
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