B&R IF681 (3IF681.86) – PROFIBUS DP Interface Module | Automation 2000 Platform
The B&R IF681 (part number 3IF681.86) is a high-performance PROFIBUS DP interface module engineered for the B&R Automation 2000 control platform. Designed to meet the rigorous demands of industrial automation environments, this module enables seamless PROFIBUS DP master/slave communication between the B&R CPU and distributed field devices — including drives, I/O stations, sensors, and actuators — across process, discrete, and hybrid manufacturing applications.
At Konmask.com, we supply this module to procurement engineers and system integrators who require verified, shelf-ready components with full traceability and rapid lead times.
Complete Technical Specifications
| Manufacturer | B&R Industrial Automation GmbH |
| Part Number | 3IF681.86 |
| Model / Catalog ID | IF681 |
| Platform | B&R Automation 2000 |
| Module Type | PROFIBUS DP Interface Module |
| Communication Protocol | PROFIBUS DP (EN 50170 / IEC 61158) |
| Operating Mode | DP Master / DP Slave (configurable) |
| Transmission Rate | 9.6 kbps – 12 Mbps (auto-detect) |
| Max. DP Slaves | Up to 125 stations per segment |
| Connector Type | 9-pin Sub-D (DB9) female |
| Backplane Interface | B&R Automation 2000 internal bus |
| Supply Voltage | Via backplane (5 VDC internal) |
| Power Consumption | Refer to B&R datasheet 3IF681.86 |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -25 °C to +70 °C |
| Relative Humidity | 5 % – 95 % (non-condensing) |
| Protection Class | IP20 |
| Dimensions (W × H × D) | Per B&R Automation 2000 module form factor |
| Weight | Approx. 140 g |
| Country of Origin | Austria |
| Certifications | CE, UL (refer to official B&R documentation) |
| Software / Configuration | B&R Automation Studio (AS) |
Proven Application Environments
- Automotive manufacturing – body-in-white lines, press automation, and paint shop conveyors requiring deterministic PROFIBUS DP fieldbus communication
- Food & beverage processing – hygienic packaging lines and filling machines integrating distributed I/O and variable-speed drives via PROFIBUS
- Pharmaceutical & life sciences – batch process control systems demanding IEC 61511 / GAMP-compliant fieldbus architectures
- Material handling & intralogistics – conveyor systems, sorters, and AGV infrastructure with multi-drop PROFIBUS DP topologies
- Energy & utilities – substation automation and pump/compressor control panels using B&R Automation 2000 as the primary PLC platform
- Machine tool & robotics – CNC retrofit projects and robot cell integration where PROFIBUS DP remains the incumbent fieldbus standard
Engineering Advantages
- Plug-and-play backplane integration – slots directly into the B&R Automation 2000 rack with no external power wiring required
- Auto baud-rate detection – supports the full PROFIBUS DP speed range (9.6 kbps to 12 Mbps) without manual DIP-switch configuration
- Dual operating modes – configurable as DP Master Class 1 (cyclic data exchange) or DP Slave, providing architectural flexibility for multi-controller topologies
- Automation Studio integration – fully supported by B&R Automation Studio for GSD-based device configuration, diagnostics, and online monitoring
- Deterministic cycle time – synchronised with the B&R CPU task cycle for time-critical process control loops
- Compact form factor – single-slot module minimises panel space consumption within the Automation 2000 rack
System Architecture & Signal Flow
The IF681 occupies a standard slot in the B&R Automation 2000 backplane. The CPU communicates with the module via the internal I/O bus; the module’s firmware handles all PROFIBUS DP protocol stack processing autonomously, offloading fieldbus overhead from the main CPU. The DB9 connector interfaces directly to the PROFIBUS cable segment (shielded twisted-pair, IEC 61158-2 compliant). Termination resistors must be enabled at both physical ends of the bus segment using the connector’s integrated termination switch.
Typical signal flow: B&R CPU (Automation Studio task) → Backplane I/O bus → IF681 PROFIBUS DP stack → DB9 segment → DP Slave devices (drives, remote I/O, sensors)
Sourcing & Quality Verification
- All units sourced through authorised distribution channels or verified surplus with full chain-of-custody documentation
- Pre-shipment inspection: visual examination, label authenticity check, and functional power-on verification where applicable
- Original manufacturer packaging preserved wherever possible; repackaged units clearly identified
- Batch traceability records retained for a minimum of 3 years
- Counterfeit-prevention policy: units failing authentication checks are quarantined and not listed for sale
Procurement Process
- Confirm part number – verify 3IF681.86 against your B&R project BOM or Automation Studio hardware configuration
- Request a quote – contact support@konmask.com or call +0086 19859288691 for volume pricing, lead time, and availability confirmation
- Place order – purchase directly via this product page or submit a formal PO to our sales team
- Shipping – standard international express (DHL / FedEx / UPS); EXW Xiamen available for freight-collect shipments
- Documentation – commercial invoice, packing list, and certificate of conformance provided with every shipment
Technical FAQ
Q: Is the IF681 compatible with B&R Automation Studio 4.x?
A: Yes. The module is supported in Automation Studio 4.x via the standard B&R hardware catalog and GSD file import.
Q: Can the IF681 operate as both DP Master and DP Slave simultaneously?
A: No. The operating mode (Master or Slave) is configured in Automation Studio and is fixed at runtime. A second IF681 module would be required for concurrent Master + Slave operation.
Q: What is the maximum cable length per PROFIBUS DP segment?
A: At 12 Mbps the maximum segment length is 100 m; at 1.5 Mbps it extends to 200 m; at 93.75 kbps the maximum is 1,200 m (per EN 50170).
Q: Do you provide a warranty?
A: Yes. Konmask.com offers a 90-day functional warranty on all modules. Extended warranty options are available upon request.
Q: Can I return the module if it is incompatible with my system?
A: Please contact our technical team before purchase to confirm compatibility. Returns are accepted within 14 days for unused, uninstalled modules in original condition.
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Contact: support@konmask.com | +0086 19859288691
