1756-L85EPXT

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-L85EPXT

Type

ControlLogix process controller

Application

PLC controller

Used with

ControlLogix 1756 chassis

Controller tasks

32 tasks, including a combination of one continuous, periodic, and event tasks 1000 programs/task

Built-in communication ports

1 port USB, Embedded Ethernet port

USB port communication

USB 2.0, Full speed (12 Mbps), Programming, configuration, firmware update, and online edits only

Ethernet performance

10/100/1000 Mbps

I/O Capacity (Class 0/1)

128,000 without CIP Security 40,000 with integrity 20,000 with integrity and confidentiality

Communication options

EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SERCOS, and third-party process and device networks

EtherNet/IP nodes supported, max

300 nodes

OPC UA nodes supported max

15,000 nodes

Network connections per network

ControlLogix 5580 Controllers front EtherNet/IP port. See ‘EtherNet/IP nodes supported, max’ in this table. 1000 I/O; 528 EtherNet/IP; 512 TCP (1756-EN4TR variant rated for harsh environments) 256 EtherNet/IP; 128 TCP (1756-EN2x variant rated for harsh environments) 128 EtherNet/IP; 64 TCP (1756-ENBT variant rated for harsh environments) 100 ControlNet (1756-CN2/A variant rated for harsh environments) 40 ControlNet (1756-CNB/D, 1756-CNB/E variant rated for harsh environments) 128 ControlNet (1756-CN2/B variant rated for harsh environments)

Integrated motion

SERCOS interface, Analog options (encoder input, LDT input, SSI input), Integrated Motion on the EtherNet/IP network

Controller redundancy

Full support with Studio 5000 Logix Designer application version 33.00.00 or later.

Programming languages

Relay Ladder Logic (RLL), Structured Text, Function Block Diagram, Sequential Function Chart (SFC)

Standard memory

40 MB

Digital I/O, max

128,000

Analog I/O, max

4000

Nonvolatile memory storage

4 GB Secure Digital (SD) card (1784-SD4XT), ships pre-installed in the controller

Energy storage module

Embedded in controller, non-removable

Number of power cycles

80,000

Current draw @ 1.2V DC

5.0 mA

Current draw @ 5.1V DC

1.20 A

Power dissipation

6.2 W

Thermal dissipation

21.2 BTU/hr

Isolation voltage

50V (continuous), Basic Insulation type, USB port to backplane, Ethernet port to backplane, and USB port to Ethernet port, Compliant and tested according to IEC/UL 61010-1

Weight, approx

0.394 kg (.868 lb)

Slot width

1

Technical documents (1)

• Rockwell Automation technical data 1756-TD001

Key features

• 32 tasks with 1000 programs per task
• Ladder, Structured Text, Function Block and SFC programming
• Full redundancy support with Studio 5000 Logix Designer 33.00.00 or later
• 4 GB SD card ships pre-installed in the controller
• Integrated motion on EtherNet/IP and SERCOS interface

About the Allen-Bradley 1756-L85EPXT

The Allen-Bradley 1756-L85EPXT is a ControlLogix 5580 Process XT Controller, and Rockwell Automation lists its lifecycle status as Active. Rockwell specifies 40 MB of standard memory, 128,000 digital I/O maximum and 4000 analog I/O maximum. It has one USB 2.0 port and an embedded Ethernet port rated 10/100/1000 Mbps. Rockwell gives a 5.1V DC current draw of 1.20 A, power dissipation of 6.2 W, a weight of approximately 0.394 kg, temperature code T4 and an open-style enclosure rating.

What is the 1756-L85EPXT used for?

The controller is chassis-based and fits any slot in a 1756-A7XT, 1756-A10XT, Series C 1756-A7ZXT or 1756-A10ZXT chassis. It runs control programs in up to 32 tasks and communicates over EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, SERCOS and third-party process and device networks. The USB port is for programming, configuration, firmware update and online edits only.

Lifecycle and successor

Active.

Before you order

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

Check that the catalog number 1756-L85EPXT, the series letter and the firmware revision on the module label match your requirement. Send us a photo of the label if you need help confirming the part.