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Product Description
May 27, 2026

Product Description

The 3IF661.9 is a plug‑in industrial communication interface module from B&R’s SYSTEM 2005 series, integrating one galvanically isolated RS485 port supporting the PROFIBUS DP slave protocol. Designed for high‑reliability fieldbus communication, it features electrical isolation, surge protection, and robust EMC performance to ensure stable data exchange in harsh industrial environments. As a dedicated PROFIBUS DP expansion unit, it enables B&R 2005 series controllers to connect seamlessly with PROFIBUS DP networks and serial field devices, enhancing system interoperability and networking flexibility.

Description

Product Description

The 3IF661.9 is a plug‑in industrial communication interface module from B&R’s SYSTEM 2005 series, integrating one galvanically isolated RS485 port supporting the PROFIBUS DP slave protocol. Designed for high‑reliability fieldbus communication, it features electrical isolation, surge protection, and robust EMC performance to ensure stable data exchange in harsh industrial environments. As a dedicated PROFIBUS DP expansion unit, it enables B&R 2005 series controllers to connect seamlessly with PROFIBUS DP networks and serial field devices, enhancing system interoperability and networking flexibility.

Basic Information

  • Model: 3IF661.9

  • Manufacturer: B&R Industrial Automation

  • Series: SYSTEM 2005 Interface Module

  • Type: 1×RS485 PROFIBUS DP slave communication module

  • Installation: Plug‑in type, compatible with CPU (e.g., CP260) and IF module (e.g., IF260, IF060) slots of SYSTEM 2005

  • Galvanic Isolation: 2.5 kV (channel‑to‑system electrical isolation)

  • Protection Class: IP20 (cabinet‑mounted)

  • Weight: Approx. 0.12 kg

  • Dimensions: 127 × 76 × 25 mm

  • Certifications: CE, cULus, EAC

  • Country of Origin: Austria

Function and Positioning

This module serves as a key PROFIBUS DP slave interface for B&R industrial control systems, enabling reliable serial communication between the main controller and PROFIBUS DP master devices or RS485‑based field equipment. It supports standard PROFIBUS DP slave communication and multi‑drop RS485 network topologies, facilitating connection with PLCs, motor drives, sensors, HMIs, and third‑party PROFIBUS‑compatible devices. The independent galvanic isolation eliminates common‑mode voltage risks and electromagnetic interference, ensuring stable operation in noisy industrial sites. It offloads communication tasks from the main CPU, improves system networking efficiency, and acts as a bridge for integrating B&R systems into PROFIBUS DP industrial networks.

Core Performance Parameters

  • Communication Interface: 1 × D‑Sub 9‑pin RS485 port (PROFIBUS DP slave)

  • Supported Protocol: PROFIBUS DP (slave mode), RS485 serial communication

  • Max Baud Rate: 12 Mbps (PROFIBUS DP), 115.2 kBaud (RS485)

  • Serial Parameters: 8 data bits, 1 stop bit, no parity (default for PROFIBUS)

  • Status Indicators: LED indicators for TX, RX, and network fault diagnosis

  • Power Supply: 5 VDC from system backplane

  • Power Consumption: Max 1.5 W

  • Operating Temperature: 0 °C to +60 °C

  • Storage Temperature: -40 °C to +85 °C

  • Relative Humidity: 5%–95%, non‑condensing

  • Max Transmission Distance: 1,200 m (RS485 at 9.6 kbps)

  • Bus Termination: Integrated switchable termination resistor for RS485

General Compatible Accessories

  • Host Modules: B&R 2005 series CPU modules (CP260) and IF modules (IF260, IF060)

  • System Backplane: B&R BP2005 series backplane

  • Connection Cables: Shielded RS485 twisted‑pair cables, PROFIBUS DP standard cables

  • Peripheral Devices: PROFIBUS DP master PLCs, RS485‑compatible motor drives, encoders, sensors, HMIs, and third‑party serial controllers

  • Configuration Software: B&R Automation Studio for PROFIBUS parameterization, network configuration, and diagnostics

  • Spare Parts: D‑Sub connectors, mounting fasteners, PROFIBUS bus terminators, isolation barriers for interference suppression

Applicable Equipment Fields

This interface module is designed for industrial automation scenarios requiring PROFIBUS DP connectivity and RS485 serial expansion. It is widely deployed in manufacturing production lines, CNC machine tools, and robotic systems. It also operates reliably in packaging machinery, textile machinery, printing machinery, and plastic processing equipment. Additionally, it is applied in pharmaceutical, food & beverage processing, energy management systems, and distributed remote monitoring systems that demand stable PROFIBUS DP or RS485 communication.


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