Bosch Rexroth DKC02.3 Series Drive Controllers: DKC02.3-200-7-FW & DKC02.3-200-7-FW/S10

Technical Dossier

Product Details And Specifications

Bosch Rexroth DKC02.3 Series: Comprehensive Module Range and Technical Overview

The Bosch Rexroth DKC02.3 series belongs to the ECODRIVE Cs family of compact AC servo drive controllers, engineered for precision motion control in continuous-duty industrial environments. These units are deployed across heavy-process industries including petrochemical refining, nuclear auxiliary systems, offshore platform machinery, steel rolling mills, and large-scale automated assembly lines. The DKC02.3 platform supports single-axis positioning with integrated safety functions and is compatible with Rexroth's SERCOS, PROFIBUS-DP, and analog/digital interface modules. Its installed base spans several hundred thousand units globally, making it one of the most widely maintained legacy drive platforms in the 200V–400V servo segment.

The Evolution of DKC02.3 Architecture

The DKC02.3 is the second-generation compact drive within Rexroth's ECODRIVE Cs lineage, succeeding the DKC01.1 and DKC02.1 platforms introduced in the mid-1990s. The .3 revision introduced a unified firmware architecture (FW) that consolidated motion task management, parameter handling, and fieldbus communication into a single embedded controller, eliminating the need for separate motion control cards used in earlier generations.

Key architectural milestones: the original DKC01.1 relied on external motion controllers and offered limited onboard diagnostics. The DKC02.1 introduced onboard parameter memory and basic PROFIBUS support. The DKC02.3 added SERCOS II compatibility, expanded I/O mapping, and the /S10 safety option — a hardware-level Safe Torque Off (STO) circuit compliant with EN 954-1 Category 3. The /S10 suffix denotes drives equipped with this integrated safety relay module, which became mandatory in many EU machinery directive applications post-2006.

The DKC02.3 series entered its end-of-production phase circa 2012–2015, with Bosch Rexroth transitioning customers toward the IndraDrive Cs (HCS01) and IndraDrive C (HCS02/HCS03) platforms. However, due to the extensive installed base in legacy machinery, demand for DKC02.3 spare units and tested replacements remains active through specialist distributors.

DKC02.3 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Bosch Rexroth DKC02.3 ECODRIVE Cs series. Units are classified by current rating, firmware variant, and safety option:

DKC02.3-040-7-FW: 40A continuous output, standard firmware, SERCOS/analog interface, no safety option.
DKC02.3-040-7-FW/S10: 40A output with integrated STO (Safe Torque Off) safety relay module.
DKC02.3-100-7-FW: 100A continuous output, standard firmware, suitable for mid-range servo motors up to 7.5 kW.
DKC02.3-100-7-FW/S10: 100A output with EN 954-1 Cat.3 STO safety circuit integrated.
DKC02.3-200-7-FW: 200A peak output, standard firmware, high-torque axis control for heavy-duty servo applications.
DKC02.3-200-7-FW/S10: 200A output with /S10 safety module — the specific unit covered by this listing.
DKC02.3-040-7-FW/S10-00: 40A, safety option, variant with extended parameter set for multi-axis synchronization.
DKC02.3-100-7-FW/S10-00: 100A, safety option, extended parameter variant.
DKC02.3-200-7-FW/S10-00: 200A, safety option, extended parameter variant with additional I/O mapping.
DKC02.3-040-7-FW-B: 40A, firmware variant B, PROFIBUS-DP primary fieldbus configuration.
DKC02.3-100-7-FW-B: 100A, firmware variant B, PROFIBUS-DP primary fieldbus configuration.
DKC02.3-200-7-FW-B: 200A, firmware variant B, PROFIBUS-DP primary fieldbus configuration.
DKC02.3-040-7-FW/S10-B: 40A, PROFIBUS-DP, with STO safety relay module.
DKC02.3-100-7-FW/S10-B: 100A, PROFIBUS-DP, with STO safety relay module.
DKC02.3-200-7-FW/S10-B: 200A, PROFIBUS-DP, with STO safety relay module — high-current PROFIBUS safety variant.
DKC02.3-040-7-FW/S10-C: 40A, SERCOS II interface, safety option, compact panel-mount configuration.
DKC02.3-100-7-FW/S10-C: 100A, SERCOS II interface, safety option, for synchronized multi-axis SERCOS rings.

Sourcing Hard-to-Find & Obsolete DKC02.3 Parts

DriveKNMS maintains a dedicated inventory program for end-of-life Bosch Rexroth ECODRIVE Cs components. As the DKC02.3 series has been discontinued by the OEM, procurement through standard distribution channels is no longer reliable. DriveKNMS sources units through controlled decommissioning projects, factory surplus acquisitions, and verified secondary market channels.

For operators running DKC02.3-based machinery beyond the OEM support window, DriveKNMS provides: direct unit replacement with tested equivalents, cross-reference matching for /S10 safety variants, firmware version verification prior to dispatch, and documentation support for CE re-certification where required. All units are catalogued by current rating, firmware revision, and safety option to ensure exact-match replacement without machine reconfiguration.

Quality Control for the DKC02.3 Range

Each DKC02.3 unit processed by DriveKNMS undergoes a structured test protocol designed around the specific electrical and communication architecture of the ECODRIVE Cs platform. Testing procedures include: DC bus capacitor ESR measurement and reformation where applicable; IGBT gate driver integrity check under load simulation; SERCOS and PROFIBUS-DP communication handshake verification using Rexroth IndraWorks diagnostic software; STO circuit continuity and response-time validation for /S10 variants (measured against EN 954-1 Category 3 timing thresholds); parameter memory read/write cycle test; and thermal imaging under 30-minute operational load to identify latent component degradation. Units that do not pass all stages are quarantined and not offered for sale.