ProSoft PLX31-EIP-PND Protocol Gateway – PLX31 Series

ProSoft PLX31-EIP-PND — Standalone Dual-Protocol Bridge for EtherNet/IP and PROFINET IO Networks

The ProSoft PLX31-EIP-PND is a DIN-rail-mounted, standalone protocol gateway engineered to establish deterministic, bidirectional data exchange between EtherNet/IP (CIP) networks and PROFINET IO networks. In mixed-vendor control architectures — where a Rockwell Automation ControlLogix or CompactLogix PLC must communicate with Siemens S7-series controllers, ET 200 distributed I/O, or third-party PROFINET IO devices — the PLX31-EIP-PND functions as the translation layer, eliminating the need for custom ladder logic, function blocks, or middleware software.

The device operates as an EtherNet/IP Adapter (slave) on one network segment and simultaneously as a PROFINET IO Device (slave) on the other. Both master controllers — the EtherNet/IP Scanner and the PROFINET IO Controller — treat the gateway as a standard I/O node, polling it cyclically within their respective scan cycles. Internal shared memory maps input and output data tables between the two protocol domains, with configurable word-level addressing that accommodates process data, status registers, and diagnostic flags.

Configuration is performed entirely through ProSoft Configuration Builder (PCB), a Windows-based GUI tool available at no cost. No PLC programming is required to define the data mapping. The gateway exports a GSDML file for import into Siemens TIA Portal or STEP 7, and an EDS file for import into Rockwell Studio 5000 or RSLogix 5000, ensuring both controllers recognize the device natively within their respective engineering environments.

The PLX31-EIP-PND is housed in a compact 45 × 100 × 115 mm enclosure rated for continuous operation from 0 °C to +60 °C. Power input is 24 VDC ±10%, drawing less than 3 W under normal operating conditions. Two independent RJ45 Ethernet ports — one per protocol domain — provide physical network isolation, preventing broadcast storms or address conflicts from propagating across the protocol boundary. Status LEDs on the front panel indicate power, EtherNet/IP connection state, PROFINET IO connection state, and data exchange activity, enabling rapid field diagnostics without a laptop.

In automotive body-shop lines, food and beverage filling systems, and packaging OEM machinery where Allen-Bradley and Siemens PLCs coexist, the PLX31-EIP-PND removes the integration barrier without requiring either PLC vendor’s hardware to be replaced. The gateway supports up to 500 input words and 500 output words per direction, covering the majority of process data volumes encountered in discrete and hybrid manufacturing applications.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The PLX31-EIP-PND implements a dual-port shared-memory architecture at its core. Each Ethernet port is driven by an independent MAC/PHY controller, meaning the EtherNet/IP stack and the PROFINET stack execute on separate logical paths without shared bus contention. This design prevents a network fault on one side — such as a cable disconnect or a broadcast storm — from disrupting the data exchange cycle on the other side.

Internally, the gateway maintains a mirrored data table in static RAM. The EtherNet/IP Adapter task writes received output data from the Scanner into one half of this table; the PROFINET IO Device task reads from the same region and presents it as input data to the IO Controller. The reverse path operates symmetrically. Access arbitration between the two tasks is managed by a semaphore mechanism, ensuring that a read and a write to the same memory region cannot overlap — a critical requirement for data coherency in cyclic I/O exchange.

EMC performance is addressed through hardware-level filtering on both Ethernet ports. Common-mode chokes on the RJ45 signal lines attenuate high-frequency noise coupled from industrial power wiring, motor drives, and relay coils operating in the same cabinet. The PCB ground plane is segmented to isolate the digital logic domain from the Ethernet magnetics, reducing radiated emissions and improving immunity to conducted disturbances per EN 61000-4-4 (EFT/Burst) and EN 61000-4-6 (conducted RF immunity).

The PROFINET IO Device stack within the PLX31-EIP-PND supports conformance class B (CC-B), which includes the alarm and diagnostic channel mechanisms defined in IEC 61158-6-10. This means the IO Controller can receive structured diagnostic alarms from the gateway — for example, a loss of EtherNet/IP connection — as a PROFINET process alarm, allowing the S7 CPU to execute a diagnostic OB (OB82 or OB86) and log the fault without polling a separate status register.

On the EtherNet/IP side, the gateway supports both Class 1 (cyclic, connection-based) and Class 3 (explicit messaging) transport. Class 1 connections carry the cyclic I/O data at configurable RPI (Requested Packet Interval) values, while Class 3 messaging allows the Scanner to read identity objects, connection manager objects, and vendor-specific diagnostic attributes from the gateway on demand.

System Integration Benefits

• Zero-code configuration: All data mapping between EtherNet/IP and PROFINET is defined graphically in ProSoft Configuration Builder. No ladder logic, structured text, or function block programming is required on either PLC to establish the data exchange.
• Native device recognition: The GSDML file imports directly into TIA Portal V13+ and STEP 7 V5.5+, and the EDS file imports into Studio 5000 V20+ and RSLogix 5000 V20+. Both controllers see the gateway as a standard I/O node in their hardware configuration trees.
• Physical network isolation: Two independent Ethernet ports prevent IP address conflicts, VLAN mismatches, and broadcast domain overlap between the EtherNet/IP and PROFINET segments, simplifying network architecture in multi-vendor plants.
• Deterministic cyclic exchange: Class 1 EtherNet/IP connections and PROFINET IO cyclic data transfer both operate at configurable cycle times (typically 1–128 ms), ensuring that process data latency is bounded and predictable — a requirement for closed-loop control applications.
• PROFINET diagnostic transparency: CC-B alarm support allows the PROFINET IO Controller to receive structured fault notifications from the gateway via the standard alarm channel, enabling OB-based fault handling in S7 CPUs without custom polling logic.
• Scalable data volume: With up to 500 input words and 500 output words per direction, the gateway accommodates applications ranging from simple status word exchange to full process data sets from multi-axis drive systems or distributed I/O racks.
• DIN-rail form factor: The standalone enclosure requires no PLC backplane slot, making it deployable in any control cabinet with 24 VDC available — independent of the PLC chassis type or available slot count.
• Front-panel LED diagnostics: Dedicated LEDs for power, EtherNet/IP connection, PROFINET IO connection, and data activity allow field technicians to assess gateway health at a glance without connecting a laptop or opening the engineering tool.
• Firmware field-upgradeable: Firmware updates are applied via USB or Ethernet, allowing security patches and protocol stack updates to be deployed without hardware replacement or factory return.
• Wide environmental tolerance: Rated for 0 °C to +60 °C operation and 5–95% RH non-condensing, the gateway is suitable for installation in standard industrial control cabinets in manufacturing, utilities, and process industries.

Quality Assurance & Global Logistics

Every PLX31-EIP-PND unit supplied by siemensplc.com is sourced as genuine ProSoft Technology hardware. Units are inspected prior to dispatch: label authenticity, firmware version, and physical condition are verified against ProSoft’s published product documentation. Packaging integrity is confirmed before shipment to ensure the unit arrives in factory condition.

Orders ship from our warehouse in Xiamen, China via DHL Express, FedEx International Priority, or UPS Worldwide Expedited, depending on destination and urgency. Transit times to major industrial hubs in Europe, Southeast Asia, the Middle East, and the Americas typically range from 3 to 7 business days. Export documentation — including commercial invoice, packing list, and HS code declaration — is prepared in compliance with Chinese customs regulations and destination country import requirements.

All units carry a 12-month warranty from the date of shipment. Warranty coverage addresses manufacturing defects and hardware failures under normal operating conditions as defined in ProSoft Technology’s product documentation. Technical support for installation, PCB configuration, and TIA Portal / Studio 5000 integration is available via email and WhatsApp throughout the warranty period and beyond.

For volume orders (5 units or more), lead-time commitments, or project-specific delivery scheduling, contact our sales team directly with your quantity, delivery address, and required ship date. We maintain stock of high-velocity ProSoft gateway models and can provide firm availability confirmation within one business day.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.