-
ꄶ Fluid Power
-
ꄶ Test & Measurement
-
ꄶ Analytical Inst.
-
ꄶ Power Transmission
-
ꄶ Electrical
-
ꄶ Automation
-
ꁇ VFDs
-
ꁇ Modules
-
ꁇ Control Systems
-
ꁇ Sensors
-
Proximity Sensors
-
Temperature Sensors
-
Photoelectric Sensors
-
Pressure Sensors
-
Magnetostrictive Sensors
-
Ultrasonic Sensors
-
Load Cells
-
Linear Displacement Sensors
-
Torque Sensors
-
Displacement Sensors
-
Inductive Sensors
-
Vibration Sensors
-
Pulse Sensors
-
Other Sensors
-
Angle Sensors
-
Temperature Digital Indicators
-
Turbidity Sensors
-
Probes
-
-
ꁇ Industrial Computers
-
ꁇ Encoders
-
ꁇ Servo Systems
-
-
ꄶ Thermal
Allen-Bradley 1756-EN2T ControlLogix EtherNet/IP Communication Module
1. Product Overview
The 1756-EN2T is an EtherNet/IP communication bridge module in Allen-Bradley's (Rockwell Automation) ControlLogix® Bulletin 1756 family. It installs in any ControlLogix chassis slot, communicates with the Logix controller over the backplane, and exposes a single RJ45 copper Ethernet port to bridge the control system onto the plant EtherNet/IP network.
The module follows EtherNet/IP (CIP over Ethernet) over 10/100Mbps autosensing twisted pair, supporting up to 128 TCP/CIP connections for programming/HMI, I/O devices (remote I/O, drives, smart instruments) and peer-to-peer exchange with other Logix controllers.
A USB 1.1 full-speed (12Mbps) configuration port allows local IP setup; front-panel LEDs show module and network status. The module draws 5.1V DC/1A and 24V DC/3mA from the backplane. It works with ControlLogix 5570/5580 control systems.
2. Specifications
表格
| Item | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Brand series | ControlLogix (Bulletin 1756) |
| Catalog number | 1756-EN2T |
| Product type | EtherNet/IP communication bridge module |
| Ethernet port | 1× RJ45 copper (10/100Mbps autosensing, full/half duplex) |
| Ethernet protocol | EtherNet/IP (CIP on Ethernet) |
| Cable | 802.3-compliant shielded/unshielded twisted pair, Cat 5 minimum |
| TCP/CIP connections | Up to 128 |
| Configuration port | 1× USB 1.1 full speed (12Mbps), local IP setup |
| Backplane supply | 5.1V DC @ 1A; 24V DC @ 3mA |
| Max power dissipation | 5.1 W |
| Mounting | Any ControlLogix chassis slot (backplane) |
| Operating temperature | 0 to +60 °C |
| Enclosure rating | Open-style (panel-mount in enclosure) |
| Status indication | Module and network status LEDs |
| Certifications | c-UL-us, CSA, FM, CE, C-Tick, EtherNet/IP; ATEX T4 |
| Programming software | Studio 5000 Logix Designer, RSLinx Classic |
| Suffix note | Series letter (A/B/C) = hardware revision; -K = conformal coating |
Per Rockwell Automation publication 1756-IN050 and official product page. Note the 1756-EN2T has a single RJ45 port; the dual-port built-in-switch DLR ring model is 1756-EN2TR, the dual-port parallel model is 1756-EN2TP, and gigabit is 1756-EN3TR. If you are unsure about port count or ring requirements, please contact us by email.
5. Model Information
- Catalog number (ordering number): 1756-EN2T
- Product description: Allen-Bradley ControlLogix EtherNet/IP communication bridge module, single RJ45 10/100M, 128 TCP/CIP connections.
- Official catalog description: EtherNet/IP communication module, 10/100M twisted pair, 128 TCP connections.
- Material number note: 1756-EN2T is the official Rockwell ordering number. 1756 = ControlLogix platform, EN = EtherNet/IP, 2 = 10/100M, T = twisted copper. Series suffix (-A/-B/-C) is a hardware revision; -K denotes conformal coating. If you have questions on port count, DLR ring or connection count, please contact us by email.
- Series features:
- Backplane-mount ControlLogix communication module
- Single RJ45 copper port, 10/100M autosensing
- EtherNet/IP (CIP) protocol, 128 TCP/CIP connections
- USB configuration port for local IP setup
- Front-panel status LEDs
- 5.1V/1A backplane current, 5.1W power
- Compatible with ControlLogix 5570/5580 controllers
- Studio 5000 / RSLinx configuration
- Related products in series: 1756-EN2TR (dual-port built-in switch, DLR), 1756-EN2TP (dual-port parallel), 1756-EN3TR (dual-port gigabit 10/100/1000), 1756-EN4TR (triple-port), 1756-EN2F (fiber), 1756-ENBT (legacy 10M)
- Matching products: ControlLogix chassis (1756-A series), ControlLogix power supply (1756-P series), ControlLogix 5570/5580 controllers, ControlLogix I/O modules, Cat5e cables, Ethernet switches
- Official documents: 1756-IN050 "1756 EtherNet/IP Communication Modules Installation Instructions"; 1756-TD003 "1756 ControlLogix Communication Modules Specifications"; Studio 5000 help
6. Why Choose Us
- Exact model match: We verify supply against your full catalog number 1756-EN2T, distinguishing EN2T (single port) from EN2TR (dual-port DLR) and EN3TR (gigabit) to avoid wrong shipment.
- Authorized channel supply: Allen-Bradley / Rockwell Automation products supplied through regular channels, with product documentation available on request.
- Selection support: We help confirm port count, connection count, IP configuration and chassis/power/controller slot matching.
- Delivery & after-sales: Quotation, lead-time confirmation and order follow-up provided; for any parameter questions or alternative options, please contact us by email.
7. FAQ
Q1: What is the 1756-EN2T?
A: It is an EtherNet/IP communication bridge module for the ControlLogix 1750 system, mounting in a ControlLogix chassis slot and providing one RJ45 Ethernet port to connect the Logix controller to EtherNet/IP for programming, HMI, I/O and peer communications.
Q2: How many Ethernet ports? Does it support DLR ring?
A: The EN2T has a single RJ45 port and does not support DLR device-level ring. For a dual-port built-in switch/ring choose 1756-EN2TR; for gigabit choose 1756-EN3TR.
Q3: How many connections does it support?
A: Up to 128 TCP/CIP connections, in any combination of programming, HMI, EtherNet/IP I/O and controller peer links.
Q4: Does it need external power?
A: No. It draws 5.1V DC/1A and 24V DC/3mA from the ControlLogix backplane; max power dissipation is 5.1W.
Q5: How is the IP address set?
A: Via the front USB port (USB 1.1, 12Mbps) for local direct connection, or over Ethernet via BOOTP/network configuration software.
Q6: Which controllers is it compatible with?
A: It works with ControlLogix 5570, ControlLogix 5580 and other Bulletin 1756 control systems, configured in Studio 5000 Logix Designer. Series letters -A/-B/-C are hardware revisions. Please email us to confirm.
