PRODUCT INFORMATION
Product Overview
Revision scope: These specifications describe 1756-EN2T/A (Series A). Check the corresponding technical data before specifying another hardware series.
The Allen-Bradley 1756-EN2T is a ControlLogix Communication Module designed for industrial EtherNet/IP communications. It provides standard 10/100 Mbps data exchange between controllers and remote network devices. The bridge module occupies a single slot in any compatible ControlLogix chassis. It establishes communication links between controllers, remote I/O modules, and drives.
This Series A interface handles up to 128 CIP connections and 256 TCP connections simultaneously. It supports unicast communication in RSLogix 5000 software version 16.03.00 or later. A front-panel full-speed USB port allows temporary local programming and diagnostics. Operating power dissipation is rated at 5.1 W with an open-style enclosure.
TECHNICAL DATA
Technical Specifications
These specifications describe 1756-EN2T/A (Series A). Check the corresponding technical data before specifying another hardware series.
| Parameter | Specification |
|---|
| Communication Rate | 10/100 Mbps |
|---|
| Current Draw at 5.1V DC | 1 A |
|---|
| Current Draw at 24V DC | 3 mA |
|---|
| Power Dissipation | 5.1 W |
|---|
| Thermal Dissipation | 17.4 BTU/hr |
|---|
| Slot Width | 1 slot |
|---|
| Module Location | Chassis-based, any slot |
|---|
| CIP Connections | 128 |
|---|
| TCP Connections | 256 |
|---|
| CIP Unconnected Messages | 128 backplane + 128 Ethernet |
|---|
| USB Interface | USB full speed (12 Mbps) |
|---|
| Operating Temperature | 0 °C to 60 °C (32 °F to 140 °F) |
|---|
| Storage Temperature | -40 °C to 85 °C (-40 °F to 185 °F) |
|---|
| Relative Humidity | 5% to 95% noncondensing |
|---|
| Operating Vibration | 2 g @ 10 to 500 Hz |
|---|
| Operating Shock | 30 g |
|---|
| Temperature Code | T4 |
|---|
| Enclosure Type Rating | None (open-style) |
|---|
TECHNICAL INFORMATION
Order Information
| Revision Part # | Also known as |
|---|
| 1756-EN2T Ser A | 1756-EN2T/A, Series A |
TECHNICAL INFORMATION
Features
- Supports 10/100 Mbps EtherNet/IP communication rates.
- Manages up to 128 CIP connections and 256 TCP connections.
- Includes duplicate IP detection across all hardware revisions.
- Provides a 12 Mbps full-speed USB port for temporary programming connections.
- Enables socket services and password-protected SNMP support.
TECHNICAL INFORMATION
Applications
- Remote I/O module and drive control over EtherNet/IP networks.
- Inter-controller messaging and supervisory HMI communication.
- Data routing across ControlLogix backplanes and plant networks.
TECHNICAL INFORMATION
Connections / Interfaces
- Supports 802.3 compliant Category 5 shielded or unshielded twisted-pair Ethernet media.
- Provides a front-accessible USB port supporting full-speed 12 Mbps connections.
- Installs directly into any slot of a ControlLogix chassis backplane interface.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any available slot of a compatible ControlLogix chassis.
- Do not use the front USB port in classified hazardous operating locations.
- Use 802.3 compliant Category 5 shielded or unshielded twisted-pair Ethernet cabling.
- Observe Category 2 conductor routing guidelines for Ethernet cabling connections.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure network parameters using RSLogix 5000 or Studio 5000 environment software.
- Unicast communication features require software version 16.03.00 or later.
- Set appropriate password access when enabling SNMP support on the module.
TECHNICAL INFORMATION
Compatibility
- Compatible with standard ControlLogix chassis models 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17.
- Operates with power supply models 1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75, 1756-PC75, and 1756-PH75.
- Supports redundant power supply modules 1756-PA75R, 1756-PB75R, and 1756-PSCA2.
- Requires RSLogix 5000 software version 16.03.00 or later for unicast communication features.
TECHNICAL INFORMATION
Compliance and Certifications
- Meets CISPR 11 Class A industrial emission requirements.
- Tested for ESD immunity according to IEC 61000-4-2 standards.
- Carries a T4 temperature code rating.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with standard ControlLogix chassis models 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17. Operates with power supply models 1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75, 1756-PC75, and 1756-PH75. Supports redundant power supply modules 1756-PA75R, 1756-PB75R, and 1756-PSCA2. Requires RSLogix 5000 software version 16.03.00 or later for unicast communication features.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the primary function of the 1756-EN2T/A module?
The 1756-EN2T/A serves as an EtherNet/IP bridge module. It connects ControlLogix controllers to remote I/O, drives, and supervisory systems.
How many simultaneous connections does the 1756-EN2T/A support?
The module supports up to 128 CIP connections and 256 TCP connections simultaneously.
What software version is required for unicast communications?
Unicast produced and consumed tag features require RSLogix 5000 software version 16.03.00 or later.
Can the front USB port remain permanently connected in a hazardous location?
No. The USB port is intended for temporary local programming only and must not be used in hazardous locations.
