1756-L85EK

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-L85EK

Type

ControlLogix 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, 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 or variant rated for harsh environments) 256 EtherNet/IP; 128 TCP (1756-EN2x or variant rated for harsh environments) 128 EtherNet/IP; 64 TCP (1756-ENBT or variant rated for harsh environments) 100 ControlNet (1756-CN2/A or variant rated for harsh environments) 40 ControlNet (1756-CNB/D, 1756-CNB/E or variant rated for harsh environments) 128 ControlNet (1756-CN2/B or variant rated for harsh environments)

Integrated motion

SERCOS interface beginning with Studio 5000 Logix Designer® application version 31.00.01 or later, Analog options (encoder input, LDT input, SSI input) beginning with Studio 5000 Logix Designer application version 31.00.01 or later, Integrated Motion on the EtherNet/IP network

Controller redundancy

Full support with Studio 5000 Logix Designer application version 33.00.02 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-SD4), 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

• 40 MB standard memory with 32 controller tasks
• Embedded Ethernet port running 10/100/1000 Mbps
• Ladder, structured text, function block and SFC programming
• 4 GB SD card ships pre-installed in the controller
• Single-slot module that fits any chassis slot

About the Allen-Bradley 1756-L85EK

The Allen-Bradley 1756-L85EK is the ControlLogix 5580 Controller, which Rockwell Automation describes as having 40 MB user memory, a USB port, a 1 gigabit embedded Ethernet port and a 4 character alpha/numeric display, and as conformally coated. Rockwell lists support for 300 EtherNet/IP nodes and 15,000 OPC UA nodes. Its technical data 1756-TD001 gives 32 tasks, a 4 GB Secure Digital card for nonvolatile storage and a current draw of 1.20 A at 5.1V DC. The module is chassis-based and has an open-style enclosure rating.

What is the 1756-L85EK used for?

The 1756-L85EK runs the control program in a ControlLogix chassis and communicates with devices over EtherNet/IP. Rockwell also lists ControlNet, DeviceNet, Data Highway Plus, Remote I/O and SERCOS among the communication options, along with integrated motion on the EtherNet/IP network. The USB port is for programming, configuration, firmware update and online edits only.

Lifecycle and successor

Phased out.

OEM successor: 1756-L85EXT

Before you order

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

Check that the catalog number on the label reads 1756-L85EK, and note the series letter and firmware revision printed there. Send us a photo of the label if you want us to confirm the part before you order.