Allen-Bradley 2711P-RP9DK & 1769-L33ER Automation Control Unit

Module Feature

2711P-RP9DK is the conformal coated DC logic module for Allen‑Bradley PanelView Plus 6 (700~1500 series) HMI, running Windows CE 6.0 system, isolated 24V DC power supply, onboard Ethernet and RS232 communication ports, K suffix represents conformal coating for humid or dusty industrial environments, this model is discontinued.

1769-L33ER belongs to CompactLogix 5370 L3 controller, 2MB user memory, dual EtherNet/IP ports supporting DLR device level ring topology, supports up to 16 pcs 1769 series I/O expansion modules, 32 EtherNet/IP nodes, equipped with supercapacitor for program backup, comes with 1GB SD card. The two parts are commonly matched together, HMI exchanges data with PLC via EtherNet/IP for operation, parameter setting, alarm display and data monitoring.

Working principle

1769-L33ER executes control logic written in Studio 5000, collects field I/O signals and sends commands to actuators. 2711P-RP9DK loads HMI runtime application, establishes EtherNet/IP connection with PLC, reads real-time tags and sends operator setpoints. The DLR ring network realizes redundant Ethernet communication to reduce single point network failure risk.

Onboard components

2711P-RP9DK：CPU core board, flash & RAM memory, Ethernet transceiver, RS232 circuit, isolated DC power circuit, conformal coating protection layer.

1769-L33ER：Control CPU, supercap backup unit, dual Ethernet PHY, SD card socket, backplane bus interface, status indicator circuit.

LED indicators

2711P-RP9DK：Power, Ethernet link, fault LED.

1769-L33ER：OK, RUN, FAULT, Ethernet port LINK/ACT status LEDs.

Hardware self‑diagnosis

Both modules run power-up self-test and continuous monitoring. PLC detects backplane error, I/O fault, network loss, memory anomaly and power failure; HMI logic module detects boot file error, storage fault and communication timeout, and displays alarm codes on touch screen.

Programming software

Studio 5000 Logix Designer for PLC logic programming; FactoryTalk View ME for HMI screen development; ControlFLASH for firmware upgrade.

Electrical & Process Parameters

Model:2711P-RP9DK + 1769-L33ER Brand:Allen‑Bradley (Rockwell Automation) 2711P-RP9DK：24V DC isolated input, conformal coated, for PanelView Plus 6 700-1500 1769-L33ER：2MB memory, dual EtherNet/IP DLR, max 16 I/O expansion Communication:EtherNet/IP, RS232 Function:PLC logic control + HMI human-machine interaction

Mechanical & Structure

Mounting:DIN rail cabinet installation Protection class:IP20 Housing:PCB module with metal shielding shell

Environmental

Operating temperature:0℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:UL, CE Status:2711P-RP9DK discontinued; 1769-L33ER mature active product

Installation

Install CompactLogix controller and I/O modules on 1769 backplane, mount HMI logic board into PanelView Plus display unit. Configure IP address, download PLC program and HMI application, establish EtherNet/IP tag communication. Use shielded Ethernet cable for DLR ring layout.

Interface

2711P-RP9DK：Ethernet port, RS232 port, 24V DC power, display board connector. 1769-L33ER：Dual Ethernet port, SD card slot, 1769 backplane bus.

Diagnostic

HMI cannot connect PLC: IP segment mismatch, tag path error, Ethernet cable fault. PLC fault light red: Backplane I/O short, program fault, memory error. HMI boot black screen: Logic module firmware damaged or flash fault. DLR network alarm: Ring break, switch port abnormality.

Product BriefAllen‑Bradley 2711P-RP9DK conformal coated HMI logic module and 1769-L33ER CompactLogix 5370 PLC set, EtherNet/IP communication, used for industrial automation control and local operation monitoring.