1756-L81ESXT

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-L81ESXT

Type

GuardLogix safety controller

Application

PLC controller

Used with

ControlLogix 1756 chassis

Controller tasks

31 standard tasks, 1 safety task, 1000 programs/task, Ethernet port

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

Standard memory

3 MB

Safety memory

1.5 MB

Digital I/O, max

128,000

Analog I/O, max

4000

Nonvolatile memory storage

4 GB Secure Digital 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, Ethernet to backplane, USB to backplane, and USB to Ethernet, Compliant and tested according to IEC/UL 61010-1

Weight, approx

0.394 kg (.868 lb)

Slot width

1

Module location

Chassis-based, any slot

Chassis

1756-A7XT, 1756-A10XT, Series C 1756-A7ZXT, 1756-A10ZXT

Wire category

3 - on USB port 2 - on Ethernet ports

Wire size

Ethernet connections:, Ethernet cabling and installation according to IEC 61918 and IEC 61784-5-2

Temperature code

T4

Enclosure type rating

None (open-style)

Technical documents (1)

• Rockwell Automation technical data 1756-TD001

Key features

• 31 standard tasks and 1 safety task
• 4 GB SD card ships pre-installed in controller
• Conformal coated for operation from -25 to +70 °C
• Chassis-based module for any slot, 1 slot wide
• Embedded energy storage module, non-removable

About the Allen-Bradley 1756-L81ESXT

The Allen-Bradley 1756-L81ESXT is a GuardLogix 5580 XT Controller, and Rockwell lists its lifecycle status as Active. Rockwell technical data 1756-TD001 gives 31 standard tasks, 1 safety task, 3 MB standard memory and 1.5 MB safety memory. It has one USB port and an embedded Ethernet port rated at 10/100/1000 Mbps. Rockwell rates the operating temperature at -25 °C to +70 °C (SIL 2/PLd) and lists the module as conformal coated.

What is the 1756-L81ESXT used for?

It is a chassis-based controller that runs standard tasks and a safety task, and it fits any slot in the 1756-A7XT, 1756-A10XT, Series C 1756-A7ZXT and 1756-A10ZXT chassis. Rockwell lists Class 0/1 I/O capacity of 128,000 without CIP Security, 40,000 with integrity, and 20,000 with integrity and confidentiality. 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 the catalog number 1756-L81ESXT, the series letter and the firmware revision on the label before ordering. Send us a photo of the label so we can confirm the part.