{"product_id":"whatsminer-p221b-p221c-p222b-p222c-psu-signal-cable-power-supply-control-board","title":"Whatsminer P221B P221C P222B P222C PSU Signal Cable – Flex Ribbon","description":"\u003ch2\u003eWhatsminer P221B \/ P221C \/ P222B \/ P222C PSU Signal Cable – Power Supply to Control Board Communication Link\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eflat ribbon signal cable\u003c\/strong\u003e connects the \u003cstrong\u003eWhatsminer P221B, P221C, P222B and P222C\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch3\u003eWhy the Signal Cable Matters\u003c\/h3\u003e\n\u003cp\u003eThe signal cable is the communication lifeline between the PSU and the control board. It carries \u003cstrong\u003eenable signals, voltage-good feedback, over-temperature warnings and fault flags\u003c\/strong\u003e. 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.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the Signal Cable\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntermittent PSU errors\u003c\/strong\u003e in the miner dashboard despite a healthy PSU on the bench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRandom shutdowns or \"PSU not responding\"\u003c\/strong\u003e in the kernel log, recovered by re-seating the cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage\u003c\/strong\u003e — cracked locking tabs, bent flex, frayed conductors, melted insulation near hot components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField-replacement during routine PSU swap\u003c\/strong\u003e — install a fresh cable alongside the new P221 \/ P222 to eliminate one variable from the repair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003ePower 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.\u003c\/p\u003e\n\u003ch4\u003eP221 \/ P222 PSU Signal Cable Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCable Type\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eFlat ribbon flex signal cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eFunction\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePSU ↔ control board communication link (enable, voltage-good, fault flags)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eConnector Layout\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eMatches Whatsminer P221 \/ P222 PSU connector pinout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCompatible PSUs\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eWhatsminer P221B, P221C, P222B, P222C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCompatible Miners\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eWhatsminer M30s, M31s, M50, M50S, M50S+, M50S++, M60, M60S, M30S++ (via P221 \/ P222 PSU fit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eUse Case\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePlug-only replacement of damaged or intermittent signal cable; routine refresh during PSU swap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated Whatsminer PSU Cables \u0026amp; Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/whatsminer-power-supply-unit-signal-cable-p21-p21e-p21d-14pin-dual-7pin-flex\"\u003eWhatsminer P21 \/ P21E \/ P21D PSU Signal Cable – Predecessor Sister Cable\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/whatsminer-p221c-psu-3300w\"\u003eWhatsminer P221C PSU 3300W – M30s \/ M31s\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/whatsminer-p222c-power-supply-psu-3300w-m30s-m31s-m30\"\u003eWhatsminer P222C PSU 3300W – M30s \/ M31s \/ M30\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/whatsminer-brand-new-p222b-power-supply-unit-psu\"\u003eWhatsminer P222B PSU – M50 \/ M60 Series\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMaintaining Whatsminer P221 \/ P222 power supplies in volume? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for bulk pricing on signal cables and matched PSU repair-kit bundles.\u003c\/p\u003e\n\u003cp\u003eWorldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":45579702436019,"sku":null,"price":1.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/whatsminer-p221-p222-signal-cable-control-board-connector.webp?v=1781590874","url":"https:\/\/lys-sz.com\/products\/whatsminer-p221b-p221c-p222b-p222c-psu-signal-cable-power-supply-control-board","provider":"LYS Shenzhen","version":"1.0","type":"link"}