1756-EN3TR

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-EN3TR

Type

EtherNet/IP communication module

Application

Communication module

Used with

ControlLogix 1756 chassis

Application

EtherNet/IP

Communication

Ethernet/IP

Display

Digital

Enclosure

None (open-style)

Mounting

Chassis

Special Features

High Capacity Motion Axes

Sub Brand

ControlLogix

Type

Communication Module

Interface

2 Copper RJ45 (10/100 Mbps)

Number Of Channels

1

ATEX temp code

T4

CIP unconnected messages

128 + 128 (backplane + Ethernet)

Communication rate

10/100 Mbps

Conducted RF immunity

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

Connections supported, max

TCP: 128, CIP: 256 (CIP connections can be used for all explicit or all implicit applications. for exAle, a 1756-ENBT module has a total of 128 CIP connections that can be used for any combination of connections.)

Current draw

1A @ 5.1V DC, 3mA @ 24V DC

EFT/B immunity

±3kV @ 5kHz on Ethernet ports

Emissions

CISPR 11: Class A

Enclosure type rating

None (open-style)

ESD immunity

6 kV contact discharges, 8 kV air discharges

Ethernet cable

802.3 compliant shielded or unshielded twisted pair

Ethernet ports

2 Ethernet RJ45 Category 5

Isolation voltage

30V (continuous), Basic Insulation Type, Ethernet to Backplane, USB to Backplane, and USB to Ethernet(Applies only to these modules/series: 1756-EN2T/D, 1756-EN2TR/C,1756-EN3TR/B), Type tested at 980V AC @ 60s

Module location

Chassis based, any slot

Operating temperature

0 °C <Ta <60 °C (32 °F <Ta <140 °F)

Technical documents (1)

• Rockwell Automation technical data 1756-TD003

Key features

• Two RJ45 Category 5 Ethernet ports
• Supports 128 TCP and 256 CIP connections
• Redundancy supported, per Rockwell data
• Chassis based, any slot, slot width 1
• Operating range 0 to 60 °C

About the Allen-Bradley 1756-EN3TR

The Allen-Bradley 1756-EN3TR is a ControlLogix communication module, listed by Rockwell Automation as CLX ENet/IP 100M Motion. Rockwell describes it as an EtherNet/IP communication module, dual port, 10/100M twisted pair, with 128 TCP connections and 128 axes. Rockwell's product data gives a communication rate of 10/100 Mbps, a current draw of 1A at 5.1V DC and 3mA at 24V DC, and power dissipation of 5.1 W. Rockwell lists its lifecycle status as Active.

What is the 1756-EN3TR used for?

The module connects a ControlLogix chassis to an EtherNet/IP network and can be fitted in any slot of the chassis. Rockwell lists its special feature as High Capacity Motion Axes, with support for 128 axes. It is an open-style module with no enclosure, and Rockwell gives a surrounding air temperature maximum of 60 °C.

Lifecycle and successor

Active.

Before you order

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

Check the catalog number 1756-EN3TR and the series letter and firmware revision on the module label. Send a photo of the label if you need help confirming the part before ordering.