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1756-ENET

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Allen-Bradley 1756-ENET is a 10 Mbps ControlLogix Ethernet communication interface with RJ45 and AUI connections for messaging, I/O access, and produced/consumed data.
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Technical specifications for 1756-ENET

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-ENET
  • Product Family:
    ControlLogix
  • Product Type:
    ControlLogix Ethernet Communication Interface Module
  • Stock:
    1
  • Network:
    Ethernet
  • Communication rate:
    10 Mbps
  • Copper connector:
    RJ45 10BASE-T
  • Alternate connector:
    AUI
  • Module location:
    Any ControlLogix chassis slot
  • Chassis occupancy:
    One slot
  • Backplane current at 5.1 V DC:
    900 mA maximum
  • Backplane current at 24 V DC:
    250 mA maximum
  • Power dissipation:
    13.3 W maximum
  • Operating temperature:
    0 to 60°C
  • Storage temperature:
    -40 to 85°C
  • Relative humidity:
    5 to 95%, non-condensing
  • Operating shock:
    30 g
  • Vibration:
    2 g at 10 to 500 Hz
  • RSLogix 5000 minimum documented version:
    7.0
  • RSLinx minimum documented version:
    2.20
  • Documented firmware:
    2.006 or 2.007
  • Dimensions:
    3.5 × 14 × 14.5 cm
  • Weight:
    0.26 kg
  • Tariff Code:
    8517623990
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Ethernet Media Logix Paths Installation Application
  • Provides a 10 Mbps Ethernet interface for early ControlLogix systems
  • Offers RJ45 10BASE-T and AUI media connections
  • Supports I/O, controller messaging, and produced/consumed data paths

1756-ENET belongs to the first ControlLogix Ethernet interface generation. Its configuration assumptions differ from later 100 Mbps EtherNet/IP modules, particularly in media, firmware, and connection planning.

The Series B installation record should be treated as part of the system configuration: retain the network address, connector path, chassis location, and the Logix project that defines its message and I/O relationships.

Before replacement, verify the 10 Mbps media, active RJ45 or AUI path, firmware, IP settings, chassis power allocation, and every controller communication route that depends on the module.

Availability, condition, price, and shipping time for 1756-ENET are confirmed during quotation.

Allen-Bradley 1756-ENET ControlLogix Ethernet Communication Interface Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Use the documented 10 Mbps network design
  • Connect through the required RJ45 10BASE-T or AUI interface
  • Preserve the installed media path when replacing the module
  • Restore controller-to-controller message routes
  • Rebuild rack-optimized or direct I/O connections from the saved project
  • Confirm produced and consumed tag paths after IP configuration
  • Install the module in one available ControlLogix chassis slot
  • Verify the 5.1 V and 24 V chassis power budget
  • Observe the official live insertion/removal and hazardous-location precautions
  • Rack-optimized remote I/O communication
  • Direct connections to analog I/O modules
  • Produced and consumed tag exchange between Logix controllers
Description
1756-ENET is the catalog family for the early ControlLogix Ethernet communication interface; the official installation instructions identify the Series B unit as 1756-ENET/B.

The module provides 10 Mbps Ethernet through an RJ45 connector or an AUI interface and supports controller messaging, remote I/O communication, and produced/consumed tag traffic.

A replacement must retain the IP configuration, firmware and Series B module definition, Ethernet media choice, chassis power budget, and the original RSLogix 5000 communication paths.
Revisions

Revision Part #

Also known as

1756-ENET Ser B
1756-ENET/B, Series B, Rev B
Alternative Names
1756-ENET 1756-ENET/B Allen-Bradley 1756-ENET Allen Bradley 1756-ENET Rockwell Automation 1756-ENET ControlLogix Ethernet 1756-ENET
Technical notes
1756-ENET replacement requires the Series B module definition, 10 Mbps media, firmware, IP settings, and saved Logix paths; selecting a faster modern module alone does not preserve compatibility.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Is 1756-ENET the same as a current 100 Mbps ControlLogix EtherNet/IP module?
No. The official 1756-ENET/B documentation specifies a 10 Mbps Ethernet interface. Confirm network speed, connector, protocol expectations, and controller support before substitution.
Should 1756-ENET use the RJ45 or AUI connector?
Use the connector required by the existing Ethernet media design. Do not reconnect both paths as though they were independent switched ports; retain the documented network interface arrangement.
Can 1756-ENET be removed while chassis power is applied?
The official installation instructions describe removal and insertion under power, but hazardous-location precautions, communications interruption, and site procedures must be observed before any live work.
Must a replacement 1756-ENET use the Series B module definition?
Yes. The official instructions identify 1756-ENET/B, so the hardware series, firmware, 10 Mbps media, and RSLogix 5000 module definition must agree with the installed system.
Can several 1756-ENET modules share one ControlLogix chassis?
Yes, the official instructions allow multiple modules, subject to available slots, chassis power, controller communication design, and the programmed message paths.
Why can a replacement 1756-ENET fail to communicate after installation?
Check the exact Series B catalog identity, firmware, IP settings, duplicate addresses, RJ45/AUI media, controller paths, and the saved RSLogix 5000 module configuration.
Does 1756-ENET support both remote I/O and controller data exchange?
The official user manual documents rack-optimized I/O, direct-connected analog I/O, and produced/consumed tags, but each connection must be recreated in the compatible Logix project.