Whatsminer P221B P221C P222B P222C PSU Signal Cable – Flex Ribbon
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Whatsminer P221B / P221C / P222B / P222C PSU Signal Cable – Power Supply to Control Board Communication Link
This flat ribbon signal cable connects the Whatsminer P221B, P221C, P222B and P222C power supply units to the miner's control board, carrying the communication and status signals that allow the firmware to monitor PSU health, enable output and read fault conditions. The flex configuration matches the P221 / P222-series connector pinout exactly, providing a secure and reliable data link between PSU and controller across the M30s / M31s / M50 / M60 family of miners these PSUs are fitted to.
Why the Signal Cable Matters
The signal cable is the communication lifeline between the PSU and the control board. It carries enable signals, voltage-good feedback, over-temperature warnings and fault flags. A damaged or degraded cable causes intermittent PSU communication failures — the miner may refuse to start, shut down unexpectedly or report PSU errors in the dashboard even though the power supply itself is functional. Replacing a suspect cable is one of the fastest diagnostic steps when troubleshooting P221 / P222-series PSU issues, and it is far cheaper than swapping the PSU itself.
When to Replace the Signal Cable
- Intermittent PSU errors in the miner dashboard despite a healthy PSU on the bench.
- Random shutdowns or "PSU not responding" in the kernel log, recovered by re-seating the cable.
- Visible damage — cracked locking tabs, bent flex, frayed conductors, melted insulation near hot components.
- Field-replacement during routine PSU swap — install a fresh cable alongside the new P221 / P222 to eliminate one variable from the repair.
Installation
Power off the miner and unplug mains. Disconnect the old signal cable from both the PSU connector and the control board header — release the locking tabs gently to avoid breaking the connector housing. Insert the new cable with the locking tabs aligned; the flat ribbon must sit flat without twisting. Press both connectors firmly until they click. Power on and verify the PSU reports normal status in the miner dashboard with no communication errors before leaving the unit unattended.
P221 / P222 PSU Signal Cable Specifications
| Parameter | Value |
|---|---|
| Cable Type | Flat ribbon flex signal cable |
| Function | PSU ↔ control board communication link (enable, voltage-good, fault flags) |
| Connector Layout | Matches Whatsminer P221 / P222 PSU connector pinout |
| Compatible PSUs | Whatsminer P221B, P221C, P222B, P222C |
| Compatible Miners | Whatsminer M30s, M31s, M50, M50S, M50S+, M50S++, M60, M60S, M30S++ (via P221 / P222 PSU fit) |
| Use Case | Plug-only replacement of damaged or intermittent signal cable; routine refresh during PSU swap |
| Condition | New |
Related Whatsminer PSU Cables & Accessories
- Whatsminer P21 / P21E / P21D PSU Signal Cable – Predecessor Sister Cable
- Whatsminer P221C PSU 3300W – M30s / M31s
- Whatsminer P222C PSU 3300W – M30s / M31s / M30
- Whatsminer P222B PSU – M50 / M60 Series
Maintaining Whatsminer P221 / P222 power supplies in volume? Contact us at contact@lys-sz.com for bulk pricing on signal cables and matched PSU repair-kit bundles.
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