{"product_id":"ge-fanuc-a20b-2101-0390-alpha-i-psm-power-supply-board","title":"GE Fanuc A20B-2101-0390 Alpha i PSM Power Supply Board","description":"\u003cp\u003eThe \u003cstrong\u003eGE Fanuc A20B-2101-0390\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eA20B-2101\u003c\/strong\u003e Power Supply PCB, operates as a dedicated hardware component for AC line noise filtering and internal DC voltage regulation within Fanuc Alpha i PSM high-power servo drive systems. It conditions raw three-phase AC power, suppresses high-frequency line harmonics, and distributes regulated low-voltage DC rails to onboard control logic and gate drive circuits without signal degradation.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eA20B-2101-0390\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eGE Fanuc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.57 kg (1.26 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e180 mm x 120 mm x 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e15 W logic side \/ 200-240 VAC power side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Type\u003c\/td\u003e\n\u003ctd\u003eInternal Power Supply Board with Integrated Noise Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Application\u003c\/td\u003e\n\u003ctd\u003eFanuc Alpha i PSM High Power Servo Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e200 to 240 VAC (3-Phase) \/ 24 VDC logic rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltering Type\u003c\/td\u003e\n\u003ctd\u003eHigh-attenuation EMI\/RFI power line filter network\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePower Distribution and Firmware Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eGE Fanuc A20B-2101-0390\u003c\/strong\u003e utilizes dedicated power routing topologies to maintain backplane bus communication velocity and logic synchronization across EtherNet\/IP and Profinet control links. High-frequency pulse-width modulation (PWM) switching signals generated by the main drive controller are isolated via onboard galvanic barrier stages, preventing voltage spikes from interrupting firmware flash compatibility routines during high-density I\/O data acquisition loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the primary cause of DC link alarm faults associated with this power supply PCB?\u003c\/p\u003e\n\u003cp\u003eA: Inconsistent input line voltages or degraded filter capacitors on the A20B-2101-0390 can result in excessive DC bus ripple voltage, triggering overvoltage or undervoltage alarm codes on the servo amplifier.\u003c\/p\u003e\n\u003cp\u003eQ: Can the noise filter section be bypassed during diagnostic bench testing?\u003c\/p\u003e\n\u003cp\u003eA: Bypassing the noise filter network is not permitted; operating the board without line filtering allows high-frequency switching noise to re-enter the AC line, causing logic resets on adjacent CNC rack modules.\u003c\/p\u003e\n\u003cp\u003eQ: What voltage check points should be measured before replacing the board?\u003c\/p\u003e\n\u003cp\u003eA: Verify the 24 VDC auxiliary input logic rail and the output auxiliary DC supply points (+5 VDC, +15 VDC, -15 VDC) using test pins on the board frame before removing the main power module chassis.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eIsolate the main three-phase 200-240 VAC power feed and wait a minimum of 10 minutes for the servo module DC link capacitors to discharge below 50 VDC.\u003c\/li\u003e\n\u003cli\u003eVerify zero residual voltage across the DC bus terminals using a calibrated digital multimeter before opening the module enclosure.\u003c\/li\u003e\n\u003cli\u003eHandle the circuit board using anti-static protection, attaching an ESD wrist strap directly to the panel earth ground frame.\u003c\/li\u003e\n\u003cli\u003eAlign the multi-pin board connectors carefully with the main PSM substrate motherboard and press evenly to ensure pins do not bend.\u003c\/li\u003e\n\u003cli\u003eSecure all mechanical mounting screws to ensure proper ground bonding between the noise filter shield plate and the drive heatsink chassis.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"GE FANUC","offers":[{"title":"Default Title","offer_id":52710281281848,"sku":"A20B-2101-039","price":220.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/A20B-2101-0392.jpg?v=1785315420","url":"https:\/\/www.automodulexpert.com\/products\/ge-fanuc-a20b-2101-0390-alpha-i-psm-power-supply-board","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}