Allen-Bradley 1756-EN4TR

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-EN4TR

Type

Communication module

Application

Communication module

Used with

1756 ControlLogix chassis

EtherNet/IP communication rate

10/100 Mbps 1 Gbps

Current draw @ 5.1V DC

1.2 A

Current draw @ 24V DC

3 mA

Power dissipation

6.12 W

Thermal dissipation

20.9BTU/Hr

Isolation voltage

30V (continuous), basic insulation type, Ethernet to backplane, USB to backplane, and USB to Ethernet, Type tested at 860V AC for 60 s, Compliant and tested according to, IEC/UL 61010-1

Slot width

1

Module location

Chassis-based, any slot

Ethernet port

2 Ethernet RJ45, Category 5E

Ethernet cable

802.3 compliant shielded or unshielded twisted-pair

USB port

USB full speed (12 Mbps)

Wiring category

2 - on Ethernet ports 3 - on USB ports

Temperature code

T4

Enclosure type rating

None (open-style)

Temperature, operating

Series C Chassis: 0 ≤ Ta ≤ +60 °C (+32 ≤ Ta ≤ +140 °F), Series B Chassis: 0 ≤ Ta ≤ +50 °C (+32 ≤ Ta ≤ +122 °F)

Temperature, storage

-40 °C< Ta < 85 °C (-40 °F < Ta < 185 °F)

Relative humidity

5…95% noncondensing

Vibration

2 g @ 10…500 Hz

Shock, operating

30 g

Emission

Class A

ESD immunity

6 kV contact discharges 8 kV air discharges

EFT/B immunity

±3 kV at 5 kHz on, Ethernet ports

Surge transient immunity

±2 kV line-earth (CM) on Ethernet ports

Conducted RF immunity

10V rms with 1 kHz sine wave 80% AM from 150 kHz…80 MHz

Technical documents (1)

• Rockwell Automation technical data 1756-TD003

Key features

• Two Ethernet RJ45 ports, Category 5E
• EtherNet/IP at 10/100 Mbps and 1 Gbps
• USB full speed port at 12 Mbps
• Occupies 1 slot in any chassis position
• Open-style enclosure with T4 temperature code

About the Allen-Bradley 1756-EN4TR

The 1756-EN4TR is a ControlLogix EtherNet/IP 1G module with CIP Security (technical data 1756-TD003). It runs EtherNet/IP at 10/100 Mbps and 1 Gbps on two RJ45 ports (Category 5E), with a full speed USB port (12 Mbps). It draws 1.2 A at 5.1V DC and 3 mA at 24V DC, dissipates 6.12 W and is 1 slot wide. It works from 0 to +60 °C in a Series C chassis and 0 to +50 °C in a Series B chassis.

What is the 1756-EN4TR used for?

It connects a ControlLogix chassis to EtherNet/IP networks from any slot. It is open-style, so it goes inside the chassis.

Lifecycle and successor

Active (Rockwell Automation lifecycle status, checked 24 October 2026).

Before you order

What to photograph or confirm so the right unit is quoted.

Read the catalog number 1756-EN4TR, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.