SST-ESR2-CLX-RLL Industrial Ethernet Gateway (Woodward Protocol Converter)

The SST-ESR2-CLX-RLL serves as a critical communication bridge enabling Rockwell Automation ControlLogix platforms to exchange data with Modbus TCP servers, EtherNet/IP devices, and third-party industrial equipment. Designed for 24/7 operation in harsh manufacturing environments, this gateway eliminates protocol barriers while maintaining microsecond-level timing precision required for synchronized automation workflows.

Industrial facilities deploying mixed-vendor ecosystems face constant integration challenges—proprietary protocols, incompatible data formats, and costly custom development. This module addresses these pain points by providing pre-configured protocol translation, allowing plant engineers to unify disparate systems without ladder logic programming or middleware servers.

Whether you're retrofitting legacy equipment into modern SCADA architectures or building greenfield automation projects, the SST-ESR2-CLX-RLL delivers plug-and-play connectivity with enterprise-grade reliability. Backed by Woodward's 150+ years of control system expertise, this gateway represents the fastest path from installation to production uptime.

Core Capabilities & Business Impact

→ Multi-Protocol Translation Engine
Simultaneously operates as Modbus TCP client/server and EtherNet/IP adapter, enabling one module to replace multiple single-protocol gateways. Reduces hardware costs by 40-60% in typical multi-vendor installations while simplifying network architecture.

✓ Dual Ethernet Port Architecture
Built-in managed switch supports Device Level Ring (DLR) topologies and linear daisy-chaining without external switches. Automatic failover ensures <1 second recovery during network disruptions, critical for continuous process industries.

✓ Zero-Programming Integration
Pre-built Add-On Instructions (AOIs) for Studio 5000 eliminate weeks of custom code development. Drag-and-drop configuration accelerates commissioning from days to hours, reducing engineering labor costs by $5,000-$15,000 per project.

✓ High-Density Connection Capacity
Supports 256 concurrent Modbus TCP sessions with configurable polling rates from 10ms to 10 seconds. Ideal for data-intensive applications like energy monitoring systems aggregating hundreds of smart meters.

✓ Hot-Swap Serviceability
Replace modules during live operation without halting production lines. Automatic configuration restoration from chassis backplane reduces Mean Time To Repair (MTTR) to under 5 minutes.

✓ Industrial-Grade Diagnostics
Front-panel LEDs and embedded web server provide real-time visibility into connection status, packet throughput, and error counters. Reduces troubleshooting time by 70% compared to black-box gateways.

Proven Application Scenarios

Automotive Manufacturing Lines
Integrate robotic welding cells (Modbus TCP) with ControlLogix-based conveyor systems. The gateway's deterministic scanning ensures weld parameter synchronization within ±2ms, preventing quality defects in high-speed assembly operations.

Pharmaceutical Batch Processing
Connect recipe management systems to reactor control PLCs for FDA 21 CFR Part 11 compliant data logging. Bi-directional communication enables real-time batch adjustments while maintaining complete audit trails.

Oil & Gas Pipeline Monitoring
Link remote terminal units (RTUs) across SCADA networks to centralized ControlLogix controllers. The module's extended temperature rating (-40°C to +70°C with conformal coating) withstands extreme outdoor installations.

Food & Beverage Packaging
Unify vision inspection systems, checkweighers, and metal detectors into single ControlLogix platform. Reduces integration complexity from 12+ serial converters to 2-3 Ethernet gateways, cutting panel space by 60%.

Data Center Infrastructure
Monitor UPS systems, CRAC units, and power distribution units through standardized Modbus interfaces. Centralized alarming reduces facility management overhead while improving uptime SLAs.

Technical Specifications & Selection Criteria

Selection Guidelines: Choose this module when your application requires simultaneous Modbus TCP and EtherNet/IP connectivity. For Modbus RTU serial devices, consider the SST-ESR2-CLX-RLL-232 variant. Projects demanding redundant controllers should deploy paired modules with coordinated IP addressing.

Advanced Integration Features

Studio 5000 Logix Designer Integration
Download free Electronic Data Sheets (EDS) and AOI libraries from Woodward's support portal. The configuration wizard auto-generates tag structures matching your Modbus register maps, eliminating manual data type conversions.

SNMP Network Management
Monitor module health via industry-standard SNMP v2c/v3 protocols. Integrate with Nagios, PRTG, or SolarWinds platforms for centralized infrastructure monitoring and automated alerting.

Firmware Over-the-Air Updates
Deploy security patches and feature enhancements via Ethernet without removing modules from chassis. Rollback protection ensures failed updates don't brick hardware.

Custom Protocol Extensions
Woodward's engineering services team can develop bespoke protocol handlers for proprietary equipment. Typical development cycles range 6-12 weeks with NRE costs from $15,000-$50,000.

Delivery Timeline & Service Commitments

Standard Lead Time: 3-5 business days for in-stock units shipping from our Shanghai distribution center. Express 24-hour delivery available for critical downtime situations (additional fees apply).

Custom Configuration: Pre-programmed modules with customer-specific IP addresses and Modbus maps ship within 7-10 business days. Provide configuration files in CSV or Studio 5000 export format.

Warranty Coverage: 18-month comprehensive warranty covering manufacturing defects, firmware issues, and hardware failures. Extended 5-year service contracts available with annual health checks.

Technical Support: Unlimited email/phone support during business hours (GMT+8). Emergency after-hours hotline for production-down scenarios. Average first-response time: <2 hours.

Documentation Package: Each module ships with quick-start guide, full user manual (PDF), Studio 5000 sample projects, and Modbus register reference spreadsheet. Video tutorials available on our YouTube channel.

Frequently Asked Questions

How do I configure Modbus register mapping for third-party devices?
Use the included Excel-based configuration tool to define register addresses, data types (INT16/INT32/FLOAT), and scaling factors. Import the generated CSV file via the module's web interface or Studio 5000 AOI parameters. Detailed mapping examples for 50+ common devices (Schneider PM5560, Siemens PAC3200, etc.) are available in our knowledge base.

What network bandwidth does the module consume during peak operation?
Typical utilization ranges 2-8 Mbps depending on polling frequency and data volume. A fully loaded configuration (256 Modbus connections @ 100ms scan rate) peaks at ~15 Mbps, well within 100BASE-TX capacity. Use the built-in traffic analyzer to baseline your specific application.

Can this gateway interface with non-Rockwell PLC brands like Siemens or Mitsubishi?
Yes, via Modbus TCP protocol. The module acts as a Modbus server, exposing ControlLogix data to any Modbus TCP client (Siemens S7-1200/1500, Mitsubishi iQ-R, etc.). Reverse direction (reading Siemens data into ControlLogix) requires the Siemens PLC to run a Modbus TCP server function block.

Does the SST-ESR2-CLX-RLL support redundant ControlLogix configurations?
Partially. The module operates in a single chassis but can exchange data with redundant controllers via produced/consumed tags over the ControlLogix backplane. For full redundancy, deploy two modules (one per chassis) with external Modbus load balancing.

What cybersecurity features protect against unauthorized network access?
Implemented safeguards include MAC address filtering, IP whitelisting, HTTPS-only web access, and role-based user authentication. For IEC 62443 compliance, enable the optional firewall ruleset and integrate with your facility's VLAN segmentation strategy.

How does performance compare to Allen-Bradley's native 1756-EN2T module?
The 1756-EN2T excels at EtherNet/IP messaging but lacks Modbus TCP protocol support. The SST-ESR2-CLX-RLL fills this gap, making it complementary rather than competitive. Many installations use both: EN2T for Rockwell device communication, SST-ESR2 for third-party integration.

Start Your Integration Project Today

Eliminate protocol barriers in your automation infrastructure with proven Woodward technology. Our application engineers provide free pre-sales consultation to validate compatibility with your existing systems. Request a detailed quotation including volume pricing, custom configuration services, and on-site commissioning support.

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