Bosch Rexroth CDB02.1B-ET-EC-EC-NN-NN-NN-NN-NN-FW Servo Control

Description

Product Introduction and Engineering Value

When a machine requires coordinated motion on two axes, the control section must match the drive architecture, feedback devices, communication network, and firmware installed in the existing system. The CDB02.1B provides the control functions for a BASIC double-axis IndraDrive configuration, with Multi-Ethernet communication and two multi-encoder interfaces.

For maintenance teams, the complete type code matters more than the family name alone. This version has no optional interfaces fitted in the positions marked NN, and its FW designation means firmware is a separate ordering item. Confirm both details before approving a replacement.

Technical Specifications

Source: Bosch Rexroth IndraDrive control-section documentation and the manufacturer’s product availability catalog.

What these specifications mean in practice

• Multi-Ethernet communication: The ET designation identifies the Multi-Ethernet interface family. Supported protocols and operating modes depend on the drive configuration and firmware; verify the required network protocol against the machine documentation.
• Dual feedback interfaces: The EC-EC combination provides multi-encoder interfaces for both axes. Confirm the encoder type, electrical interface, and feedback evaluation requirements before installation.
• No fitted safety option: The NN safety-interface positions do not identify an integrated safety option in this configuration. Do not assume that Safe Torque Off (STO) or Safe Motion is available.
• Separate firmware ordering: The FW suffix is a procurement detail with operational consequences. The correct drive firmware must be identified for the intended application.

The configuration codes above follow the published CDB02 type-code definitions.

Field Applications and Engineering Experience

Illustrative maintenance scenario: dual-axis machine recovery

Consider a packaging line that stops after a failure in its existing IndraDrive control section. The maintenance team has a replacement unit available, but the machine’s motion sequence cannot be released until both axes communicate correctly with the controller and the feedback signals agree with the commissioning records.

The correct approach is to compare the full type code, material number, firmware, encoder configuration, and fieldbus settings before removing the failed unit. Once installed, the replacement must be commissioned and tested under the machine manufacturer’s procedures. Matching the CDB02 family alone is not sufficient evidence of compatibility.

This is an illustrative engineering scenario, not a documented installation involving a particular customer.

Applications suited to this control architecture

1. Dual-axis packaging equipment: Coordinated feed and positioning axes requiring compatible drive communication and feedback interfaces.
2. Electronic assembly machinery: Synchronized positioning stages where the selected encoder interfaces must match the installed feedback devices.
3. Industrial handling systems: Two-axis motion assemblies requiring integration with an existing IndraDrive and Multi-Ethernet control architecture.

Actual suitability depends on the complete drive system, motion requirements, firmware, and machine-level safety design.

CDB02.1B-ET-EC-EC-NN-NN-NN-NN-NN-FW

CDB02.1B-ET-EC-EC-NN-NN-NN-NN-NN-FW

Quality Assurance and Testing Procedure

A replacement control section should be evaluated according to its condition and intended application. A seller’s description alone does not establish operational compatibility or prove that a unit has passed functional testing.

Step 1 — Identification and configuration

Check the complete type code, material number, nameplate, interface options, and firmware requirements against the purchase specification.

Step 2 — Physical inspection

Inspect the housing, connectors, terminal areas, labels, and evidence of corrosion, contamination, impact, or unauthorized repair.

Step 3 — Functional verification

Where suitable test equipment and a compatible drive system are available, verify startup, diagnostic behavior, communication, and encoder-interface operation. Record any limitations in the test report.

Step 4 — Documentation and release

Record the tested serial number, reported condition, firmware information where available, test scope, and warranty terms before shipment.

New Surplus vs. Refurbished

• New surplus: Should be supported by a clear condition statement and available traceability records. Unused condition does not automatically establish current firmware compatibility or successful functional testing.
• Refurbished: Should include a description of the repair or refurbishment work and the functional tests performed.
• Warranty: Confirm the coverage period, return conditions, and exclusions in writing before ordering.

These are recommended acceptance criteria, not claims that a specific unit has already passed testing. Actual stock condition and test records must be confirmed with the supplier.

The Veteran’s Tech Trap Guide

Trap 1: Ordering by the CDB02 family name alone

The CDB02 family includes configurations with different interface and safety options. An alternative type code may look nearly identical yet lack a required interface. Compare every character in the ordering code before approving a substitute.

Trap 2: Assuming the firmware comes with the control section

The FW suffix indicates that drive firmware must be ordered separately. Confirm the required firmware designation, version compatibility, licensing or ordering requirements, and commissioning procedure before scheduling a machine restart.

Trap 3: Treating encoder compatibility as a connector check

A physically compatible connector does not guarantee compatible feedback evaluation. Verify the encoder technology, wiring, parameterization, and feedback scaling for both axes. Also, do not infer that safety functions are present when the corresponding type-code positions are NN.

PRO TIP: Before removing the original control section, preserve the machine’s approved parameter backups, firmware identification, axis configuration, encoder settings, and communication settings. Follow the manufacturer’s shutdown, isolation, and commissioning procedures; never use a live production machine as the first functional test.

Frequently Asked Questions

Q1. What is the material number for this Bosch Rexroth control section?

The material number associated with CDB02.1B-ET-EC-EC-NN-NN-NN-NN-NN-FW is R911338332. Verify the nameplate and complete type code when purchasing a replacement.

Q2. Is this a single-axis or double-axis controller?

It is a BASIC double-axis control section in the IndraDrive family. Its two EC entries designate multi-encoder interfaces for the two axes. The complete drive arrangement and supported motion functions depend on the associated hardware and firmware.

Q3. Does this model support EtherCAT and PROFINET?

The ET designation identifies the Multi-Ethernet interface. Bosch Rexroth documentation lists EtherCAT, PROFINET IO, EtherNet/IP, and Sercos III among the supported interface technologies. Confirm the required protocol and operating mode against the specific firmware and system configuration before commissioning.

Q4. Does the unit include firmware and integrated safety functions?

The FW suffix indicates that firmware must be ordered separately. The specified NN safety-interface positions indicate that those optional safety interfaces are not equipped. Do not assume that the unit includes an integrated STO or Safe Motion option.

Q5. How can I confirm that a replacement is compatible with my existing machine?

Provide the supplier with the complete type code, material number, drive power-section model, firmware designation, encoder types, and controller communication requirements. Ask for written confirmation of compatibility and identify any parameter transfer or recommissioning work required.

Q6. How do I verify New Surplus authenticity and warranty coverage?

Request clear photographs of the actual unit and nameplate, the material and serial numbers, the seller’s condition declaration, and any available provenance or test documentation. For New Surplus stock, distinguish unused condition from factory-sealed condition and tested operational condition. Obtain the warranty period, return policy, and coverage exclusions in writing.