KUKA KRC2 DSE-IBS Board
Technical sheet and troubleshooting checklist for the KUKA KRC2 DSE-IBS Board for service or maintenance use. It’s suitable for both print and download.
Modern machines often use electronic safety circuits or microprocessors for interlock safety systems. Safety relays control machinery in hazardous situations by isolating the actuator from the energy supply. You can use relays to create a safety circuit. Understanding safety relays is crucial. This article will show how to replace the KUKA KRC2 DSE board, applicable to other DSE boards as well.
What is the KUKA KRC2 DSE-IBS Board?
The DSE-IBS C33 board is a PCI card installed inside the KUKA KRC2 controller. It serves as an interface between:
- The KUKA robot’s drives (via the RDC card in the robot base),
- And the KUKA PC system, handling trajectory control and motor feedback.
Key Functions
1. Communication with RDC (Resolver Digital Converter)
- The robot arm has an RDC board that collects resolver (joint position) data.
- The DSE-IBS board communicates with this RDC via a green Interbus cable (fiber optic or copper depending on version).
- This connection ensures accurate joint position feedback.
2.Trajectory Planning Interface
- Receives motion commands from the KUKA System Software.
- Translates and sends these commands to the robot drives via the KPS (KUKA Power Supply) and KSD (KUKA Servo Drives) chain.
3. Drive Diagnostics and Safety
- Monitors motor currents, errors, and other drive parameters.
- Works with the ESC board (Emergency Stop Circuitry) for safe shutdown in faults.
Safety Circuit
We will use safety relays to demonstrate when safety should be applied to your robot. A safety relay shows how a safety circuit functions, helping to eliminate or reduce risks.
To ensure machine safety, build a safety circuit tailored to your company’s safety requirements, allowing for single or multiple circuits.
Common Symptoms of a Faulty DSE-IBS Board
- KUKA controller fails to boot in either automatic or manual mode.
- Common error messages include:
- “No connection to RDC”
- “DSE-RDC communication error”
- “Axis not ready” or “Drive bus error”
- Occasional feedback loss or servo drive problems.
- Red LED on the DSE board remains lit or flashes erratically.
Replacing or Testing the DSE-IBS Board
- Turn off the controller completely before handling it.
- Carefully disconnect the green Interbus cable and other connectors.
- Check for loose connections by removing and reseating the PCI card.
- If possible, swap with a functioning DSE-IBS board to identify the issue.
Technical Notes
- Part Number: Usually 00-108-254 or similar (varies by version).
- Compatible with KUKA KRC2 systems (not suitable for KRC4).
- Ensure firmware matches the KSS (KUKA System Software) version.
Related Components
| Component | Role |
|---|---|
| RDC Board | Reads motor positions and sends data to the DSE |
| KSD Drives | Drive amplifiers for each axis |
| KPS Power Supply | Central power source for drives |
| ESC Card | Manages safety interlocks |
| MFC Card | Fieldbus communication (e.g. for I/O) |
Technical Sheet – KUKA KRC2 DSE-IBS Board
Component Name: DSE-IBS C33
Function: This component provides the drive system electronics interface for Interbus communication between the KUKA PC and robot drives.
Robot Controller: KRC2 (not compatible with KRC4)
Typical Part Number: 00-108-254 or variations (verify labels)
Interface Type: PCI
Key Connection: Green Interbus (fiber optic or copper) connects to the RDC board in the robot base.
Related Components:
- RDC Board (located in robot arm)
- KPS (KUKA Power Supply)
- KSD (Servo Drives)
- ESC (Emergency Stop Circuit)
- MFC card (Fieldbus/IO)
LED Indicators:
- Green LED – Communication is OK
- Red LED (flashing) – Indicates communication failure or board fault
- No LED – The board is not powered
Important Tips
- Handle the board with anti-static precautions.
- Power down before connecting or disconnecting the Interbus cable.
- Keep spare DSE-IBS and Interbus cables on hand for quick replacement.
Get Your Free Download Now
Troubleshooting Checklist – DSE-IBS Board (KRC2)
1. Visual & Connection Inspection
- Power down the controller completely.
- Check the PCI seating of the DSE-IBS card – remove and reseat.
- Inspect the green Interbus cable (to RDC) for damage or poor seating.
- Check for bent pins or corrosion on connectors.
- Verify LEDs on the board after reboot.
2. Boot Behavior & Error Codes
- Does the controller boot fully into KUKA HMI?
- Check for RDC-related messages:
-
- “No connection to RDC”
- “DSE-RDC communication error”
- “Axis not ready”
- “Drive bus error”
- Use KUKA Diagnosis Monitor (if available) for drive communication status.
3. Board & Cable Swap (if possible)
- Test the DSE-IBS in another KRC2 controller to confirm if the board is faulty.
- Replace the green Interbus cable with a known good one.
- Replace the RDC board (in the robot base) if errors persist.
4. Software & Firmware Checks
- Ensure KUKA System Software (KSS) version matches DSE board firmware.
- Reinstall or update KSS if communication issues arise.
- Backup and reload the robot archive if necessary.
5. When to Replace the Board
- If the DSE-IBS board shows no LED or a persistent red LED after all checks.
- If confirmed faulty via testing in another controller.
- If the PCB has visible damage (burn marks, broken capacitors).
Discover the Future of Robotics Today!
Explore our range of innovative robots designed to enhance your life and streamline tasks.
Robot Part: The KRC2 DSE-IBS board and how to exchange it. See diagram:
The KRC2 DSE part exchange diagram below shows a basic layout of the board taking into account the device or computer, the robot teach pendant and the RDC of robot itself. We will consider a bit more the role of the safety circuit and why is important. See below:
For the connections please see below:
