EtherNet/IP ↔ Modbus TCP Solution — PROSOFT PLX31-EIP-MBTCP | PLX31 Series
Where This Product Is Used
The PROSOFT PLX31-EIP-MBTCP is deployed wherever a Rockwell Automation EtherNet/IP network must exchange real-time data with Modbus TCP devices — without custom middleware, OPC servers, or protocol converters that introduce latency and single points of failure. Typical deployment environments include:
- Oil & Gas Upstream/Midstream: Connecting Allen-Bradley ControlLogix or CompactLogix PLCs to Modbus TCP flow computers, RTUs, and wellhead controllers across SCADA networks.
- Water & Wastewater Treatment Plants: Integrating EtherNet/IP-based control systems with legacy Modbus TCP instrumentation — level transmitters, flow meters, and chemical dosing pumps — without replacing field devices.
- Power Generation & Utilities: Bridging EtherNet/IP supervisory systems to Modbus TCP energy meters, protection relays, and UPS systems for unified energy management.
- Automotive & Discrete Manufacturing: Linking Rockwell PLC networks to Modbus TCP variable frequency drives (VFDs), servo drives, and third-party I/O modules on the plant floor.
- Building Automation & HVAC: Connecting BMS controllers using Modbus TCP to EtherNet/IP-based facility management systems for centralized monitoring.
- Food & Beverage Processing: Enabling data exchange between EtherNet/IP production control systems and Modbus TCP weighing systems, temperature controllers, and batch recorders.
Technical Specifications
| Part Number | PLX31-EIP-MBTCP |
| Manufacturer | ProSoft Technology |
| Protocol Side A | EtherNet/IP (Client / Server) |
| Protocol Side B | Modbus TCP (Master / Slave) |
| Network Ports | 2 × RJ45 10/100 Mbps Ethernet (independent) |
| EIP Connections | Up to 100 Class 1 I/O connections; Class 3 explicit messaging |
| Modbus TCP Connections | Up to 32 simultaneous client/server connections |
| Data Table Size | Up to 5,000 registers (configurable) |
| Configuration Tool | ProSoft Configuration Builder (PCB) — free download |
| Power Supply | 24 VDC (±10%), <3 W typical |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Mounting | DIN rail (35 mm) |
| Dimensions (W×H×D) | Approx. 45 × 100 × 115 mm |
| Weight | Approx. 300 g |
| Certifications | UL, CE, RoHS |
| ODVA Conformance | EtherNet/IP conformance tested |
Why Engineers Specify This Model
- Standalone, DIN-rail mounted: No backplane slot required — installs in any panel alongside existing hardware without consuming PLC rack space.
- Dual independent Ethernet ports: Physically separates the EtherNet/IP network from the Modbus TCP network, eliminating broadcast storms and simplifying network segmentation.
- Bidirectional data mapping: Configurable read/write mapping tables allow granular control over which registers flow in which direction — no programming required on the PLC side beyond standard MSG or I/O tags.
- ProSoft Configuration Builder (PCB): Free, Windows-based configuration utility with built-in diagnostics, live data monitoring, and event logging — reduces commissioning time significantly.
- Proven Rockwell ecosystem compatibility: Tested with ControlLogix, CompactLogix, and MicroLogix families; Add-On Profiles (AOPs) available for Studio 5000 Logix Designer.
- Deterministic scan cycle: Configurable update rates ensure time-critical process data arrives within defined latency windows.
Complete System Bill of Materials
A typical PLX31-EIP-MBTCP integration panel includes the following components. Contact Konmask for bundle pricing:
- PLX31-EIP-MBTCP — Communication Gateway (this unit)
- 24 VDC DIN-rail power supply (e.g., Phoenix Contact QUINT or equivalent)
- Managed Ethernet switch with IGMP snooping (for EtherNet/IP multicast management)
- Cat5e / Cat6 shielded patch cables (RJ45, field-length)
- 35 mm DIN rail + end stops + terminal blocks
- ProSoft Configuration Builder software (free — download from ProSoft website)
- USB-to-serial adapter (for initial configuration via serial port, if applicable)
- Rockwell Studio 5000 Add-On Profile (AOP) for PLX31 (free — available from ProSoft)
Compliance & Industry Standards
- UL Listed — UL 508 (Industrial Control Equipment)
- CE Marked — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- RoHS Compliant — Directive 2011/65/EU (restriction of hazardous substances)
- ODVA EtherNet/IP Conformance Tested — ensures interoperability with all ODVA-certified EtherNet/IP devices
- Modbus.org Compliant — implements Modbus TCP specification per modbus.org published standard
Quality Assurance & Sourcing
Konmask sources the PLX31-EIP-MBTCP exclusively through authorized ProSoft Technology distribution channels. Every unit shipped from our warehouse undergoes the following verification process:
- Visual inspection of housing, label, and connector integrity
- Firmware version verification against ProSoft’s current release
- Power-on functional test confirming both Ethernet ports initialize correctly
- Original manufacturer packaging with intact tamper-evident seals
- Certificate of conformity available upon request for regulated industries
We do not source from grey-market channels. All units carry the full ProSoft Technology manufacturer warranty.
How to Source This Part
- Add to cart directly on this page for standard stock orders.
- Request a quote for volume orders (5+ units) — email [email protected] with your project BOM and required delivery date.
- Expedited sourcing: If lead time is critical, call or WhatsApp +0086 19859288691 — we maintain safety stock of high-velocity ProSoft gateway SKUs.
- Export orders: We ship internationally with full commercial invoice, packing list, and HS code documentation. Contact us for DDP/DAP Incoterms pricing.
Application-Specific FAQ
Q: Can the PLX31-EIP-MBTCP act as both an EtherNet/IP server AND a Modbus TCP master simultaneously?
A: Yes. The module operates as an EtherNet/IP adapter (server) to the Rockwell PLC while simultaneously acting as a Modbus TCP client (master) polling field devices — all within a single configurable data table.
Q: How many Modbus TCP slave devices can it poll?
A: Up to 32 simultaneous Modbus TCP connections are supported. Each connection can address a unique IP/port combination, enabling polling of 32 independent slave devices in a single gateway.
Q: Is this compatible with CompactLogix as well as ControlLogix?
A: Yes. The PLX31-EIP-MBTCP is compatible with any EtherNet/IP scanner — including ControlLogix (L7x/L8x), CompactLogix (L3x), and GuardLogix platforms — using standard I/O or MSG instructions.
Q: What happens if the Modbus TCP network goes down?
A: The gateway maintains the last-known-good data in its registers and can be configured to set a fault bit in the EtherNet/IP data table, allowing the PLC program to execute a defined fault-handling routine.
Q: Do I need a ProSoft license or subscription to use the configuration software?
A: No. ProSoft Configuration Builder (PCB) is free to download and use with no license fees or subscriptions required.
Q: Can Konmask provide pre-configured units for my application?
A: Yes — for volume orders, we offer pre-configuration services. Provide your network parameters and register mapping requirements, and we will deliver units ready for panel installation. Contact us to discuss scope and pricing.
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Original Source: https://Konmask.com
Contact: [email protected] | +0086 19859288691
