1756-L81ES

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-L81ES

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) - packets/second

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-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K, 1756-A17, 1756-A17K, Series B and Series C

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
• Embedded Ethernet port at 10/100/1000 Mbps
• 4 GB SD card ships pre-installed
• Operates from 0 to 60 °C in Series C chassis
• Single slot width, fits any chassis slot

About the Allen-Bradley 1756-L81ES

The Allen-Bradley 1756-L81ES is listed by Rockwell Automation as the GuardLogix 5580 Controller, a safety controller with Active lifecycle status. Rockwell specifies 3 MB standard memory and 1.5 MB safety memory, with 31 standard tasks and 1 safety task. It has a USB port and an embedded Ethernet port running at 10/100/1000 Mbps, and Rockwell lists support for 100 EtherNet/IP devices. Rockwell gives the power dissipation as 6.2 W and the weight as approximately 0.394 kg.

What is the 1756-L81ES used for?

Rockwell describes the 1756-L81ES as a chassis-based safety controller that fits any slot of the listed 1756 chassis. It runs standard and safety tasks, and its USB port is for programming, configuration, firmware update and online edits only. The embedded Ethernet port carries EtherNet/IP communication with up to 100 devices.

Lifecycle and successor

Active.

Before you order

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

Check that the label reads catalog number 1756-L81ES, and note the series letter and firmware revision printed on it. Send us a photo of the label if you want the part checked before ordering.