1756-L75

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-L75

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 32 programs/tasks prior to RSLogix 5000® programming software, version 15.01.00 100 programs/task beginning with RSLogix 5000 programming software, version 15.01.00 1000 programs/task beginning with Logix Designer application, version 24.00.00

Built-in communication ports

1-port USB

Communication options

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

USB port communication

Programming, configuration, firmware update, and online edits only

Controller connections supported max

500

Network connections, per network module

1000 I/O; 528 EtherNet/IP; 512 TCP (1756-EN4TR) 256 EtherNet/IP; 128 TCP (1756-EN2x) 128 EtherNet/IP; 64 TCP (1756-ENBT) 100 ControlNet (1756-CN2/A) 40 ControlNet (1756-CNB/D, 1756-CNB/E) 128 ControlNet (1756-CN2/B)

Controller redundancy

Full support

Integrated motion

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

Programming languages

Relay ladder logic, Structured text, Function Block Diagram, Sequential function chart (SFC)

User memory

32 MB

I/O memory

0.98 MB

Nonvolatile memory storage

1 GB Secure Digital (SD) card (1784-SD1), ships pre-installed in the controller

Digital I/O max

128,000

Analog I/O max

4000

Total I/O max

128,000

Energy storage module

1756-ESMCAP, 1756-ESMCAPK capacitor energy storage module (removable, ships installed with every controller) 1756-ESMNSE, 1756-ESMNSEK capacitor energy storage module (removable, no residual WallClockTime power backup) 1756-ESMNRM, 1756-ESMNRMK capacitor energy storage module (non-removable, helps prevent USB connection and SD card use to help secure the controller)

Current draw @ 1.2V DC

5 mA

Current draw @ 5.1V DC

800 mA

Power dissipation

2.5 W

Thermal dissipation

8.5 BTU/hr

Isolation voltage

30V (continuous), basic insulation type, USB port-to-system, Compliant and tested according to IEC/UL 61010-1

USB port

USB 2.0, full speed (12 Mbps)

Weight approx

0.25 kg (0.55 lb)

Slot width

1

Module location

Chassis-based, any slot

Technical documents (1)

• Rockwell Automation technical data 1756-TD001

Key features

• 32 MB user memory and 0.98 MB I/O memory
• Supports up to 500 controller connections
• Full controller redundancy support
• Ladder, structured text, function block and SFC programming
• 1 GB SD card ships pre-installed

About the Allen-Bradley 1756-L75

The Allen-Bradley 1756-L75 is a chassis-based ControlLogix 32 MB controller that is one slot wide and can be fitted in any slot. Rockwell technical data 1756-TD001 lists 32 MB user memory, 0.98 MB I/O memory, 500 controller connections and a maximum of 128,000 I/O. It has a 1-port USB 2.0 full speed connection, and the communication options include EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O and SERCOS. Rockwell lists its lifecycle status as Active Mature.

What is the 1756-L75 used for?

The 1756-L75 runs the control program in a ControlLogix chassis and supports up to 32 tasks, programmed in relay ladder logic, structured text, function block diagram or sequential function chart. Rockwell lists integrated motion over SERCOS interface and EtherNet/IP, and full support for controller redundancy.

Lifecycle and successor

Active.

Before you order

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

Check that the catalog number on the module label reads 1756-L75, and note the series letter and firmware revision printed there. If you are unsure, send us a photo of the label and we will check it against your requirement.