Description
Product Introduction & Engineering Value
Motion failures are rarely limited to the drive hardware itself. A replacement controller must match motor characteristics, communication settings, and the original machine sequence. The Berghof RDC2 was designed as a compact motion control solution for systems requiring two independent DC motor channels with programmable positioning behavior.
For engineers maintaining legacy Berghof-based machines, the RDC2 remains valuable because it preserves the existing control architecture. Instead of redesigning the machine around a modern drive platform, a verified replacement can restore the original motion system with minimal integration changes.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Berghof Automatisierungstechnik |
| Model | RDC2 |
| Alternative Reference | 13353 |
| Product Type | Intelligent dual servo controller |
| Motor Channels | 2 channels |
| Motor Type | Brushed DC motors |
| Supply Voltage | 24–75 VDC |
| Maximum Output Power | 2 × 300 W |
| Communication Interface | CANopen (CiA profile) |
| Service Interface | RS232 |
| Digital Inputs | 6 × 24 VDC |
| Digital Outputs | 2 × 24 VDC / 0.5 A |
| Analog Inputs | 3 × ±10 V |
| Control Functions | Speed control, positioning control, point-to-point commands, interpolation profiles |
| Mounting | Industrial cabinet / module mounting |
The RDC2 provides CANopen communication, RS232 configuration access, two DC motor outputs, and integrated I/O functions for motion system integration.
Field Application & The “Trench” Experience
A European automation equipment manufacturer maintained a legacy assembly machine using Berghof motion hardware for precision positioning. After years of operation, one motor axis began showing inconsistent positioning errors. The mechanical components checked within specification, but diagnostics pointed toward unstable drive control.
The maintenance team replaced the aging RDC2 module during a planned shutdown. They restored the CANopen node configuration, verified motor parameters, checked encoder feedback behavior, and returned the machine to production without changing the PLC application.
The field lesson is straightforward: motion controllers store the relationship between software commands and mechanical movement. Replacement requires configuration discipline.
Typical application scenarios:
- Automated assembly fixtures requiring dual-axis DC motor positioning
- Semiconductor handling mechanisms with repeatable positioning cycles
- Laboratory automation equipment using compact motion stages
- Industrial inspection systems with CAN-based motion control
RDC2
RDC2
Transparency SOP: QA & Testing
A reliable RDC2 replacement should be evaluated through a controlled motion verification process.
Testing workflow:
- Hardware inspection
- Confirm Berghof identification label
- Inspect connectors and housing
- Check for overheating or physical damage
- Power and communication checks
- Apply controlled DC supply
- Verify CANopen communication response
- Confirm RS232 parameter access
- Motion validation
- Test both motor channels
- Verify direction control
- Confirm speed regulation
- Check digital I/O operation
- Validate analog input response
A servo controller should never be approved for critical spare inventory based only on a successful power-up test.
The Veteran’s Tech Trap Guide
⚠️ Motor voltage compatibility must be verified
The RDC2 supports a 24–75 VDC motor supply range. Installing it into a system with incorrect motor voltage or current requirements can create immediate faults or hardware damage.
⚠️ CANopen node settings are easy to miss
A replacement RDC2 may communicate physically but fail to join the control network if node addressing and communication parameters do not match the original configuration.
PRO TIP: Save the original CANopen parameters before removing the failed module.
⚠️ Do not ignore motor feedback wiring
Positioning accuracy depends on correct feedback signals. Encoder or resolver-related wiring problems can appear as controller faults even when the RDC2 hardware is healthy.
Dynamic FAQ
Q1. What is the Berghof RDC2 used for?
The RDC2 is an intelligent dual servo controller used for controlling two brushed DC motors in industrial automation applications.
Q2. What communication interfaces does the RDC2 support?
The module supports a CANopen interface for system communication and an RS232 interface for configuration and parameterization.
Q3. Can the RDC2 control two motors independently?
Yes. The RDC2 is designed as a two-channel servo controller with independent motor control capability.
Q4. Is the Berghof RDC2 still available as a new OEM product?
The RDC2 is considered a legacy Berghof motion controller. Availability is generally through remaining inventory, tested surplus units, or refurbished automation suppliers.
Q5. What should be checked before replacing an RDC2?
Verify:
- Motor voltage and current ratings
- CANopen configuration
- Existing motion parameters
- Feedback wiring
- PLC communication settings
Q6. Are refurbished RDC2 units tested before shipment?
A qualified refurbished unit should include power testing, communication verification, and functional motor control checks before being supplied as a production spare.
Q7. What warranty applies to a surplus Berghof RDC2?
Warranty depends on supplier testing standards and product condition. Industrial automation spare suppliers typically provide limited functional warranty coverage for tested surplus or refurbished units.
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