Industrial Fieldbus Communication Solution — SEW DFI21B | MOVIDRIVE Interbus Interface Module
The SEW DFI21B is a plug-in Interbus interface option card designed for SEW-EURODRIVE MOVIDRIVE® frequency inverters. It enables seamless, real-time cyclic data exchange between the drive and an Interbus master controller, making it the preferred choice for engineers integrating SEW drives into Interbus-based automation networks.
Where This Product Is Used
The DFI21B is specified across a wide range of industrial automation environments where Interbus fieldbus communication is the plant-standard protocol:
- Automotive Assembly Lines — Synchronised conveyor and transfer systems controlled via Interbus ring topology, where precise speed and torque commands are issued from a central PLC to multiple MOVIDRIVE units.
- Intralogistics & Warehouse Automation — Sorter systems, accumulation conveyors, and cross-belt sorters requiring deterministic cycle times and real-time status feedback from each drive node.
- Packaging Machinery — Multi-axis packaging lines where the DFI21B allows the MOVIDRIVE to receive process data objects (PDOs) from a Beckhoff, Phoenix Contact, or Siemens Interbus master.
- Material Handling & Crane Systems — Hoist and travel drives integrated into plant-wide Interbus networks for coordinated motion and safety monitoring.
- Food & Beverage Processing — Hygienic conveyor and pump drives where Interbus provides the communication backbone for SCADA and DCS integration.
- Paper & Printing Industry — Web tension control and winder/unwinder applications requiring high-speed cyclic process data exchange.
- Port & Bulk Handling Equipment — Stacker-reclaimer and ship-loader drives networked via Interbus for centralised supervisory control.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | DFI21B |
| Manufacturer | SEW-EURODRIVE |
| Module Type | Interbus Fieldbus Interface Option Card |
| Compatible Drive Series | MOVIDRIVE® MDX60B / MDX61B |
| Fieldbus Protocol | Interbus (IBS) — IEC 61158 / EN 50254 |
| Transmission Rate | 500 kbps (fixed) |
| Process Data Words | Up to 3 PD words (configurable) |
| Remote Bus Connection | 9-pin D-Sub (IN) + 9-pin D-Sub (OUT) |
| Installation Slot | Option slot of MOVIDRIVE B |
| Power Supply | Supplied internally via drive option slot |
| Approvals | CE, UL (drive-level) |
| Weight | Approx. 9.42 kg (packaged) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −25 °C to +70 °C |
Specifications are based on SEW-EURODRIVE published data. Always verify against the official DFI21B manual (document no. 10097413) for your specific application.
Why Engineers Specify This Model
- Native MOVIDRIVE Integration — Plug-and-play installation into the MOVIDRIVE B option slot; no external gateway or converter required, eliminating additional failure points.
- Deterministic Real-Time Communication — Interbus ring topology guarantees fixed cycle times, critical for synchronised multi-drive applications.
- Compact Form Factor — Mounts directly inside the drive enclosure, saving panel space and reducing wiring complexity.
- Broad PLC Compatibility — Works with Interbus masters from Phoenix Contact, Beckhoff, Siemens, and other IEC 61158-compliant controllers.
- Proven Field Reliability — Widely deployed in automotive and logistics plants globally; long service history with predictable MTBF.
- Simplified Commissioning — Configured via MOVITOOLS® MotionStudio; no separate fieldbus configuration tool required for basic PD mapping.
- Transparent Diagnostics — LED status indicators and drive-integrated diagnostics allow rapid fault isolation without specialist fieldbus equipment.
Complete System Bill of Materials
A typical MOVIDRIVE + Interbus node installation requires the following components:
| Item | Description | Notes |
|---|---|---|
| MOVIDRIVE® MDX61B | Host frequency inverter | Size 1–7 depending on motor power |
| DFI21B | Interbus interface option card | This product |
| Interbus Remote Bus Cable | Shielded 9-core cable (IBS standard) | Phoenix Contact or equivalent |
| Interbus Master Module | PLC-side Interbus master card | e.g. Phoenix Contact IB IL 24 BK-T |
| MOVITOOLS® MotionStudio | Commissioning & parameterisation software | SEW-EURODRIVE (free download) |
| 24 VDC Control Supply | External 24 V supply for control electronics | Required for bus-hold during power-down |
| Motor & Encoder | SEW DT/DV series or third-party motor | Encoder required for closed-loop modes |
Compliance & Industry Standards
- IEC 61158 — Fieldbus standard for industrial communication networks (Interbus Type 8)
- EN 50254 — High-efficiency communication subsystems for measurement and control
- CE Marking — Compliant with EU Low Voltage Directive and EMC Directive as part of MOVIDRIVE system
- UL Listed — Drive-level UL certification applicable to North American installations
- RoHS Compliant — Restriction of Hazardous Substances per EU Directive 2011/65/EU
- ISO 9001 — Manufactured under SEW-EURODRIVE’s certified quality management system
Quality Assurance & Sourcing
At Konmask.com, every SEW DFI21B unit is subject to a rigorous incoming inspection process:
- Visual inspection for physical damage, connector integrity, and PCB condition
- Verification of part number label, revision level, and serial number traceability
- Functional bench test where applicable using MOVIDRIVE test rig
- Anti-static packaging with humidity indicator card for safe transit
- Units sourced from authorised distributors, OEM surplus, or verified industrial decommissions
We stock both new-in-box and tested-used units. Condition is clearly stated on each listing. All units carry a 90-day return-to-base warranty against defects in materials and workmanship.
How to Source This Part
- Confirm compatibility — Verify your MOVIDRIVE model is MDX60B or MDX61B series and that the option slot is available (not occupied by another option card).
- Check your Interbus master — Confirm the master supports standard Interbus remote bus and that your GSD/configuration file is available for the DFI21B.
- Contact us with your requirement — Email support@konmask.com or call +0086 19859288691 with your required quantity, condition preference (new / tested-used), and delivery timeline.
- Receive quotation — We respond within 1 business day with pricing, lead time, and stock availability.
- Place order & ship — Orders confirmed before 14:00 CST are processed same day. Export documentation (commercial invoice, packing list, COO) provided for international shipments.
Application-Specific FAQ
Q: Can the DFI21B be used with MOVIDRIVE A (MDX60A/61A) series?
A: No. The DFI21B is designed exclusively for the MOVIDRIVE B (MDX60B/MDX61B) platform. For MOVIDRIVE A, the equivalent module is the DFI11B. Please confirm your drive generation before ordering.
Q: How many process data words can be exchanged per Interbus cycle?
A: The DFI21B supports up to 3 process data words (PDW) in each direction (setpoint and actual value). The number of active PDWs is configured via MOVITOOLS® MotionStudio parameter P876.
Q: Is the DFI21B compatible with Interbus-S (the older variant)?
A: The DFI21B implements the standard Interbus remote bus protocol. Compatibility with legacy Interbus-S masters depends on the master’s firmware version. Consult your master vendor for backward compatibility confirmation.
Q: Can I run the DFI21B alongside another option card (e.g. encoder or brake chopper)?
A: MOVIDRIVE B has two option slots (slot A and slot B). The DFI21B occupies one slot. A second option card (e.g. DEH21B encoder card) can be installed in the remaining slot simultaneously.
Q: What happens to the drive if the Interbus communication is interrupted?
A: The drive response to a bus fault is configurable via parameter P831 (response to fieldbus timeout). Options include: no response, fault trip (E-stop), or controlled ramp-down. Configure according to your safety requirements.
Q: Do you provide the DFI21B configuration file for Phoenix Contact Interbus masters?
A: Yes. Contact us and we will supply the IBS device description file and commissioning notes for Phoenix Contact IBS masters at no charge.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
