Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | JANCD-CP50B |
| Manufacturer | Yaskawa Electric |
| Controller Series | DX100 / DX200 |
| Function | Main CPU / Motion Processor |
| Bus Interface | Y-Bus / S-Bus / M-Bus |
| Memory | SRAM with Battery Backup |
| Cooling | Forced Air (Fan Dependent) |
| Firmware | System Dependent (Verify Version) |
| Diagnostics | LED Status Indicators |
| Mounting | Backplane Slot |
Product Introduction
YASKAWA JANCD-CP50B serves as the central processing unit for Motoman DX100 and DX200 robot controllers. It executes motion algorithms, manages I/O, and coordinates servo communication.This board handles real-time multi-axis interpolation and safety logic. A single fault here stops the entire cell. We test every JANCD-CP50B on a live DX100 rack to verify boot sequence and servo handshake before it ships.
Installation & Configuration Guide
Preparation (10 min)
Power down the controller completely. Wait 5 minutes for capacitor discharge. (The charge LED on the power supply must be OFF.) Back up your current job files and parameters via USB or network.Removal (5–10 min)
Remove the controller front cover. Disconnect any ribbon cables attached to the CPU. Release the ejector levers on the JANCD-CP50B. Pull the board straight out. Do not twist.Installation (10 min)
Check the backplane pins for debris or bending. Align the JANCD-CP50B with the guide rails. Push firmly until levers lock. Reconnect ribbons. Ensure the cooling fan is operational; this board generates significant heat.Power-On & Test (10 min)
Restore power. Watch the front panel LEDs. The “ALM” light should flash briefly then go out. “RUN” must stay solid green. If you see an alarm code, write it down immediately. Do not cycle power repeatedly.
Troubleshooting Quick Reference
| Symptom | Probability | Immediate Action |
|---|---|---|
| No Boot / Blank Screen | 75% | Check 24V DC input to board. Verify fan operation. |
| Alarm 3000 Series | 60% | Memory corruption. Try cold start (hold RESET + POWER). |
| Servo Comm Error | 80% | Check S-Bus ribbon cable. Reseat CPU board. |
| Intermittent Faults | 50% | Overheating. Clean filters. Check ambient temp. |
| Battery Alarm | 90% | Replace SRAM battery immediately. Backup lost soon. |
Dimensions, Mounting & Wiring Notes
- Form Factor: Standard Yaskawa Controller Slot
- Mounting: Backplane connector + Ejector Levers
- Cooling: Requires active airflow; do not block vents
- Connections:
- S-Bus: Servo communication ribbon
- M-Bus: I/O and Fieldbus ribbon
- Battery: CR2032 or similar (Check manual)
- ESD Warning: Handle by edges only. Ground yourself.
FAQ
Can I swap this with a JANCD-CP50A?
Maybe, but don’t risk it. The “B” revision often has updated SRAM or bus timing. If your system was commissioned with a “B”, stick to “B”. Mixing revisions can cause subtle servo tuning issues.I got an alarm after swapping the CPU. What now?
Check the ribbon cables first. 90% of post-swap faults are loose S-Bus connections. If cables are good, verify the SRAM battery voltage. A dead battery during swap can corrupt parameters.Does this come with firmware loaded?
Yes, but it’s likely a base version. You will need to load your specific robot application software and parameters from backup. The board is just the hardware; your jobs live in memory.How do I know if my CPU is failing?
Watch for random servo disconnects or memory errors that clear after power cycling. If you’re replacing batteries weekly, the SRAM circuit is degrading. Don’t wait for total failure.Do you verify the firmware version?
We read and record it during testing. However, Yaskawa updates firmware frequently. Always compare the version on the new JANCD-CP50B with your system requirements. Downgrading may be necessary.What’s the return policy if it doesn’t boot?
If it fails our 24-hour load test, we don’t ship it. If it fails in your rack, contact us within 24 hours. We need the alarm code and a photo of the LED status. No code, no diagnosis.Is this compatible with DX200?
Yes, JANCD-CP50B is used in both DX100 and DX200 platforms. But always check the physical slot keying. Some early DX200s used different backplanes. Measure twice.
