Description

The Woodhead SST-ESR2-CPX-P is a high-performance industrial communication gateway designed to bridge Ethernet/IP (used predominantly by Rockwell Automation/Allen-Bradley systems) and PROFIBUS DP (widely deployed in Siemens and European automation environments). As part of the SST (Smart Serial Technology) product family—originally developed by Hilscher and later integrated into Woodhead’s connectivity portfolio under Molex—the SST-ESR2-CPX-P enables real-time, deterministic data exchange between otherwise incompatible control platforms without requiring custom programming or additional supervisory software.

Positioned as a critical enabler of mixed-vendor automation, the Woodhead SST-ESR2-CPX-P supports transparent I/O mapping, cyclic data transfer, and acyclic messaging between master and slave devices across protocols. It is commonly installed in retrofit projects, brownfield expansions, or multi-OEM production lines where legacy PROFIBUS field devices (such as drives, I/O blocks, or valves) must communicate with modern CompactLogix or ControlLogix controllers via Ethernet/IP. With its compact DIN-rail form factor, wide temperature tolerance, and dual independent network ports, the SST-ESR2-CPX-P delivers enterprise-grade interoperability in a rugged, maintenance-free package trusted across automotive, food & beverage, and material handling sectors.

Technical Specifications

Main Features and Advantages

Protocol transparency with zero application code changes:
The Woodhead SST-ESR2-CPX-P acts as a true protocol converter—mapping I/O data between Ethernet/IP adapters and PROFIBUS slaves automatically. Users configure data size, update rates, and node addresses via simple utility software; once deployed, the gateway requires no PLC logic modifications. This eliminates weeks of integration effort in hybrid control environments.

Robust industrial design for continuous operation:
Housed in a metal-reinforced enclosure with conformal-coated PCBs, the SST-ESR2-CPX-P resists EMI, vibration, and condensation. Its wide operating temperature range ensures reliability in unconditioned panels near ovens, freezers, or outdoor conveyors—common failure points for consumer-grade gateways.

Built-in diagnostics and easy commissioning:
Dual status LEDs per network indicate link, activity, and error conditions. The unit ships with a standard GSD file for seamless import into Siemens Step 7 or TIA Portal, while Rockwell Studio 5000 recognizes it as a generic Ethernet/IP adapter. Firmware updates are delivered over Ethernet, enabling remote maintenance without physical access.

Scalable for complex topologies:
Supports up to 244 bytes of input and 244 bytes of output per PROFIBUS cycle, sufficient for dozens of remote I/O modules or multiple drives. The SST-ESR2-CPX-P can operate as a PROFIBUS slave (most common) or, with optional firmware, as a master—offering flexibility for both new builds and legacy migrations.

Application Field

The Woodhead SST-ESR2-CPX-P excels in facilities undergoing digital transformation where legacy PROFIBUS infrastructure must coexist with modern Ethernet/IP-based control systems. In automotive plants, it connects Siemens S7-300 safety PLCs on PROFIBUS to Allen-Bradley GuardLogix controllers for coordinated press line safety. In food processing, the SST-ESR2-CPX-P integrates existing Simatic ET 200S I/O stations with new CompactLogix lines for OEE tracking—without rewiring hundreds of sensors.

Packaging machinery OEMs embed the SST-ESR2-CPX-P to offer “universal controller compatibility,” allowing end users to choose Rockwell or Siemens PLCs while using the same machine base. In wastewater treatment, it bridges SCADA systems (via Ethernet/IP) to submerged PROFIBUS pumps and analyzers located kilometers from the main panel. Even in mining conveyor networks, the SST-ESR2-CPX-P’s ruggedness ensures uninterrupted data flow between surface control rooms and underground drive stations. Across all these scenarios, the SST-ESR2-CPX-P removes protocol barriers—turning integration challenges into competitive advantages.

Related Products

• SST-ESR2-CPX-E: Ethernet/IP to EtherNet/IP redundant gateway (for dual-ring architectures)

• SST-PFB-CPX: PROFIBUS-to-PROFINET gateway—alternative when migrating to PROFINET instead of Ethernet/IP

• SST-ESB-CPX: DeviceNet to Ethernet/IP gateway—complements SST-ESR2-CPX-P in mixed-fieldbus plants

• Molex 88900-0001: Replacement power terminal block for SST-ESR2-CPX-P units

• GSD_0063.gsd: Standard GSD file provided for PROFIBUS configuration

• SST-ESR2-DM: Diagnostic module for monitoring multiple SST gateways via Modbus TCP

• Allen-Bradley 1756-EN2T: Common Ethernet/IP module used alongside SST-ESR2-CPX-P in ControlLogix racks

Installation and Maintenance

Pre-installation preparation: Before mounting the Woodhead SST-ESR2-CPX-P, verify that both Ethernet/IP and PROFIBUS networks are powered down. Install on a grounded DIN rail with at least 50 mm clearance for airflow. Use shielded cables for both networks—ground PROFIBUS shield at one end only, and Ethernet shield at the switch/controller end. Load the correct GSD file into your PROFIBUS master configuration tool and assign a unique station address (1–126). Configure IP settings via the SST Bootloader Utility before connecting to the Ethernet/IP network.

Maintenance recommendations: Periodically check the status LEDs on the SST-ESR2-CPX-P for blinking error patterns (e.g., rapid red flash = PROFIBUS parity error). Monitor network traffic using Wireshark or Rockwell’s RSLinx to confirm cyclic I/O updates. Keep firmware updated through the utility—new versions often improve timing jitter or add diagnostic registers. Store spares in static-safe packaging; although solid-state, prolonged exposure to >70°C ambient can degrade internal capacitors over time. The SST-ESR2-CPX-P requires no calibration or routine servicing under normal conditions.