June 02, 2026

3IF781.9 aPCI Interface Module – Detailed Product Description

The 3IF781.9 is a high-performance aPCI-based communication interface module manufactured by B&R (Bernecker + Rainer), designed for the B&R System 2005 automation platform and compatible Automation PC systems. It functions as a dedicated Ethernet communication module, providing a single 10/100 Base-T Ethernet port for reliable, high-speed network connectivity in industrial environments. Engineered for seamless integration into B&R’s automation ecosystem, it enables System 2005 controllers to connect to Ethernet-based networks, supporting standard industrial protocols and facilitating data exchange with HMIs, SCADA systems, and other networked devices. With rugged hardware design, electrical isolation, and robust data processing capabilities, the module ensures stable and efficient network communication for demanding industrial applications.

Description

3IF781.9 aPCI Interface Module – Detailed Product Description

1. Product Overview

2. Core Specifications

2.1 Communication Interfaces

Ethernet Port: 1 × 10/100 Base-T Ethernet interface (RJ45 connector), supporting auto-negotiation for 10 Mbps or 100 Mbps data rates; compliant with IEEE 802.3 standards.
Supported Protocols: TCP/IP, UDP/IP, Modbus TCP, HTTP, FTP, and B&R’s proprietary real-time protocols; enables seamless communication with third-party Ethernet devices and B&R automation systems.
Isolation: Electrical isolation between the Ethernet interface and the System 2005 backplane protects against voltage spikes, ground loops, and EMI/RFI interference, enhancing reliability in harsh industrial environments.
Data Buffering: On-board transmit/receive data buffers reduce CPU load and ensure smooth, latency-optimized data transmission for real-time applications.
Network Topologies: Supports star, line, and tree topologies; compatible with standard industrial Ethernet switches and hubs.
Node Capacity: No inherent node limit; operates within the constraints of the Ethernet network infrastructure and IP addressing scheme.

2.2 Mechanical & Environmental

Form Factor: aPCI plug-in module (single slot), compatible with System 2005 backplanes and B&R Automation PC aPCI slots.
Protection Class: IP20 (protected against solid objects >12 mm; intended for indoor industrial use).
Operating Temperature: 0°C to +55°C (standard); extended range -25°C to +60°C available for extreme conditions.
Storage Temperature: -40°C to +85°C.
Power Supply: 5 VDC from the System 2005 backplane; power consumption approximately 1.8 W (no external power required).
Weight: Approximately 0.16 kg.
Dimensions: Standard System 2005 module size (W 30 mm × H 90 mm × D 84 mm), compatible with 19-inch rack-mount or standalone System 2005 controllers and Automation PCs.

2.3 Compliance & Certification

Industrial Standards: CE, UL, CSA, and RoHS compliant.
EMC Performance: Meets IEC 61000-6-2 (industrial immunity) and IEC 61000-6-4 (industrial emission) requirements, ensuring reliable operation in electromagnetically challenging environments.

3. Key Features

High-Speed Ethernet Connectivity: Single 10/100 Base-T port delivers fast, reliable network communication for industrial data exchange and real-time control.
Electrical Isolation: Isolation between the Ethernet interface and backplane prevents ground loops and protects against industrial noise, minimizing downtime in harsh environments.
Multi-Protocol Support: Compatibility with TCP/IP, Modbus TCP, and B&R real-time protocols ensures seamless integration with diverse industrial devices and systems.
On-Board Data Buffers: Dedicated buffers reduce controller workload, improving communication efficiency and reducing latency for time-critical applications.
Rugged Industrial Design: Conformal-coated PCB and vibration-resistant components withstand dust, moisture, and mechanical stress, supporting 24/7 continuous operation.
Seamless System Integration: Plug-and-play installation with hot-swap capability; fully compatible with B&R Automation Studio for configuration, diagnostics, and firmware updates.
Diagnostic LEDs: Status indicators for power, Ethernet link, and activity enable quick on-site troubleshooting and network monitoring.
Compact Form Factor: Single-slot aPCI design saves valuable rack space, simplifying system layout and reducing hardware costs.

4. Application Scenarios

Factory Automation: Connects System 2005 controllers to HMIs, SCADA systems, and production line devices via Ethernet for centralized monitoring and control.
Data Acquisition & Monitoring: Transfers real-time process data from controllers to enterprise-level systems (MES, ERP) for analysis, reporting, and production optimization.
Remote Maintenance & Diagnostics: Enables secure remote access to System 2005 controllers for troubleshooting, firmware updates, and system configuration via Ethernet networks.
Industrial Networking: Integrates B&R automation systems into existing Ethernet-based plant networks, facilitating interoperability with third-party PLCs, drives, and I/O devices.
Building Automation: Connects HVAC, lighting, and security system controllers to central management platforms for efficient building control and energy management.

5. Compatibility & Ordering

Compatible Systems: B&R System 2005 controllers, backplanes, and I/O systems; B&R Automation PC series with aPCI slots.
Part Number: 3IF781.9 (original B&R part; terminal blocks ordered separately for field wiring if required).
Warranty: 12 months (original B&R warranty); extended warranty available upon request.

6. Conclusion

The 3IF781.9 is a compact, robust aPCI Ethernet interface module optimized for B&R System 2005 and Automation PC systems. With its high-speed 10/100 Base-T port, electrical isolation, multi-protocol support, and rugged design, it delivers reliable, cost-effective network connectivity for industrial automation applications. Ideal for factory automation, data acquisition, remote maintenance, and industrial networking, it ensures seamless integration and stable performance in complex, demanding automation environments.

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