Allen-Bradley 1756-CN2RK ControlLogix Communication Module
ALLEN-BRADLEY · Programmable Controllers

1756-CN2RK

ControlLogix Communication Module

ControlNet Redundant Interface Module (100 connections) - Conformally Coated

Catalog Number
1756-CN2RK
Product Family
ControlLogix Communication Modules
Platform
ControlLogix
Category
Programmable Controllers
Product Type
Industrial automation product
TECHNICAL INFORMATION

1756-CN2RK technical information

Technical Specifications

CommunicationControlNet
Logix communication connections128
Supporting protocol for EtherNet/IPFalse
Interface2 ControlNet BNC's
Supporting protocol for AS-Interface Safety at WorkFalse
With optical interfaceFalse
Enclosure type ratingNone (open-style)
Operating temperature0 to 60 °C
Number Of Channels2
Power dissipation6.7 W
Slot width1
APPLICATION / ENGINEERING

1756-CN2RK application and engineering notes

System Role

ControlLogix coordinates high-performance centralized control, large EtherNet/IP architectures, distributed I/O, motion and, where required, safety or redundancy for large machine and process applications.

Selection Criteria

Size controller generation and memory together with EtherNet/IP device load, task/program structure, motion axes, safety/redundancy requirements, chassis and communication modules.

Integration

Engineer 1756 chassis/modules, remote POINT/FLEX/5000 I/O, PowerFlex/Kinetix, FactoryTalk and third-party EtherNet/IP devices as one architecture, including RPI, produced/consumed data, messaging and diagnostics.

Migration / Modernization

For PLC-5, SLC 500 and older ControlLogix migrations, validate I/O conversion, Remote I/O/DH+ communications, MSG logic, tag/program conversion, scan behavior and the controlled cutover plan.

DS Robotik evaluates product selection together with field conditions and system architecture, covering PLC/I/O architecture, panels, software, integration, commissioning and modernization.

PRODUCT STRUCTURE

1756-CN2RK system position

Allen-Bradley 1756-CN2RK is part of the ControlLogix Communication Modules product family on the ControlLogix platform.