DANFOSS FCD 311 Modules FCD311PT4P66STR1DCF00T62C0

Technical Dossier

Product Details And Specifications

DANFOSS FCD 311 Series Technical Notes

The DANFOSS FCD 311 series is a dedicated decentralized frequency inverter platform engineered for installation directly on or near the driven motor, eliminating centralized control cabinet requirements. Deployed extensively across global heavy industry — including chemical processing plants, nuclear facility auxiliary systems, petroleum refineries, water treatment infrastructure, and continuous-process manufacturing — the FCD 311 occupies a critical position in distributed motor control architecture. Its IP66/IP67-rated enclosure variants allow direct field mounting in wash-down and outdoor environments, a specification that has made it the default selection for conveyor drives, pump stations, and fan arrays in facilities where cabinet space is constrained or hazardous area segregation is mandatory. The series supports 3-phase 380–480 V AC input across a power range of 0.25 kW to 7.5 kW, with integrated RFI filtering and brake chopper options available on selected variants. Its fieldbus-ready design supports PROFIBUS-DP, DeviceNet, AS-Interface, and CANopen communication adapters, enabling seamless integration into existing DCS and SCADA architectures without gateway hardware.

The Evolution of FCD 311 Architecture

The FCD 311 was introduced by DANFOSS Drives as a successor to the FCD 300 platform, addressing field-level integration demands that centralized VLT drives could not efficiently serve. The original FCD 300 required separate mounting enclosures and lacked native IP66 protection; the FCD 311 resolved both constraints by integrating the power electronics, control board, and EMC filter into a single sealed housing. Early production units (circa 2000–2005) used a parallel communication interface requiring dedicated FCD 300 protocol converters. From approximately 2006 onward, DANFOSS standardized the FCD 311 on the FC Series communication protocol stack, enabling backward-compatible fieldbus adapters shared with the VLT Micro Drive FC 51 and VLT HVAC Drive FC 102 families. This architectural convergence significantly reduced spare parts complexity for multi-drive installations. The FCD 311 series entered its mature/end-of-active-production phase; DANFOSS has positioned the VLT Decentral Drive FCD 302 as the primary modern replacement. However, the installed base of FCD 311 units in legacy chemical and water utility plants remains substantial, and long-term maintenance support — including refurbished units, tested spare boards, and compatible fieldbus adapters — remains commercially essential through specialist distributors.

FCD 311 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the DANFOSS FCD 311 series, classified by power rating and enclosure/communication configuration:

FCD311PT4P66STR1DCF00T62C0: 3-phase 380–480 V, IP66, PROFIBUS-DP, 1.1 kW decentralized inverter — the subject unit of this listing.
FCD311PT2P26STR1DCF00T62C0: 3-phase 380–480 V, IP66, 0.25 kW, standard I/O, no fieldbus adapter.
FCD311PT3P06STR1DCF00T62C0: 3-phase 380–480 V, IP66, 0.37 kW, standard I/O configuration.
FCD311PT4P06STR1DCF00T62C0: 3-phase 380–480 V, IP66, 0.75 kW, standard I/O, no fieldbus.
FCD311PT4P66STR1DCF00T62C1: 3-phase 380–480 V, IP66, 1.1 kW, PROFIBUS-DP, brake chopper variant.
FCD311PT5P56STR1DCF00T62C0: 3-phase 380–480 V, IP66, 1.5 kW, standard I/O.
FCD311PT7P56STR1DCF00T62C0: 3-phase 380–480 V, IP66, 2.2 kW, standard I/O.
FCD311PT9P06STR1DCF00T62C0: 3-phase 380–480 V, IP66, 3.0 kW, standard I/O.
FCD311PT11K6STR1DCF00T62C0: 3-phase 380–480 V, IP66, 4.0 kW, standard I/O.
FCD311PT15K6STR1DCF00T62C0: 3-phase 380–480 V, IP66, 5.5 kW, standard I/O.
FCD311PT18K6STR1DCF00T62C0: 3-phase 380–480 V, IP66, 7.5 kW, standard I/O, top of range.
FCD311PT4P66STR1DCF00T62C0-AS: AS-Interface communication variant, 1.1 kW, IP66.
FCD311PT4P66STR1DCF00T62C0-DN: DeviceNet communication variant, 1.1 kW, IP66.
FCD311PT4P66STR1DCF00T62C0-CO: CANopen communication variant, 1.1 kW, IP66.
FCD311PT7P56STR1DCF00T62C0-PB: PROFIBUS-DP, 2.2 kW, IP66, high-demand conveyor drive configuration.
FCD311PT11K6STR1DCF00T62C0-DN: DeviceNet, 4.0 kW, IP66, pump and fan duty variant.

Sourcing Hard-to-Find & Obsolete FCD 311 Parts

Q: Can you support multi-unit or repeat RFQ requests?
A: Yes. Send the model list, target quantity and destination so DRIVEKNMS can review sourcing options and quote the requirement as a project RFQ.

Quality Control for the FCD 311 Range

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.