1756-ENBT

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-ENBT

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

Sub Brand

ControlLogix

Type

Communication Module

Interface

1 Copper RJ45 (10/100 Mbps)

Number Of Channels

1

ATEX temp code

T4

CIP unconnected messages

64 + 64 (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: 64, CIP: 128 (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

700mA @ 5.1V DC, 3mA @ 24V DC

EFT/B immunity

±2kV @ 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

1 Ethernet RJ45 Category 5

Isolation voltage

30V (continuous), basic insulation type, Ethernet, network to backplane, Type tested @ 707V DC @ 60s

Module location

Chassis based, any slot

Operating temperature

0 °C <Ta <60 °C (32 °F <Ta <140 °F)

Power dissipation

3.7 W

Technical documents (1)

• Rockwell Automation technical data 1756-TD003

Key features

• One RJ45 Category 5 Ethernet port
• Communication rate of 10/100 Mbps
• Supports 64 TCP and 128 CIP connections
• Chassis based, fits any slot, one slot wide
• Operating temperature 0 °C to 60 °C

About the Allen-Bradley 1756-ENBT

The Allen-Bradley 1756-ENBT is a ControlLogix communication module, listed by Rockwell Automation as the ControlLogix Enet/IP Comms Module. Rockwell's product data gives one copper RJ45 interface at 10/100 Mbps, support for the EtherNet/IP and TCP/IP protocols, and a maximum of 64 TCP and 128 CIP connections. It is an open-style module with a current draw of 700mA @ 5.1V DC and 3mA @ 24V DC. Rockwell shows its lifecycle status as Discontinued and names the 1756-EN2T as the Functional Replacement.

What is the 1756-ENBT used for?

The module connects a ControlLogix chassis to an EtherNet/IP network, carrying explicit and implicit CIP messaging and TCP/IP traffic. Rockwell lists its application as EtherNet/IP. It is fitted in any slot of a ControlLogix chassis.

Lifecycle and successor

Discontinued.

OEM successor: 1756-EN2T

Before you order

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

Check the catalog number 1756-ENBT on the module label, together with the series letter and firmware revision. Send us a photo of the label if you need help confirming the part.