{"id":186,"date":"2026-09-16T13:58:24","date_gmt":"2026-09-16T05:58:24","guid":{"rendered":"https:\/\/oukeplc.com\/?p=186"},"modified":"2026-09-16T13:58:24","modified_gmt":"2026-09-16T05:58:24","slug":"a06b-6087-h130-psm-30-specs-common-failures-repair-guide-2","status":"publish","type":"post","link":"https:\/\/oukeplc.com\/zh\/news\/a06b-6087-h130-psm-30-specs-common-failures-repair-guide-2.html","title":{"rendered":"A06B-6087-H130 (PSM-30): Specs, Common Failures & Repair Guide"},"content":{"rendered":"

The A06B-6087-H130<\/strong> is the Fanuc Alpha PSM-30 \u2014 a 30 kW power supply module that feeds the DC link for every servo and spindle amplifier in the cabinet. It is the bigger brother of the PSM-26, built for machines with heavier axis loads and larger spindles. Those bigger loads also mean it fails in its own characteristic ways, especially around regenerative energy. This guide covers the specs, the failures we see most in our repair lab, and when a PSM-30 is the right answer \u2014 including as an upgrade for a PSM-26.<\/p>\n

What Is the A06B-6087-H130?<\/h2>\n

The A06B-6087-H130 \u2014 the PSM-30<\/strong> \u2014 is a 30 kW power supply module in the Fanuc Alpha 6087 series. It converts 3-phase 200 V class mains into the DC link voltage that powers the cabinet’s servo amplifier modules and spindle amplifier module, and it absorbs regenerative energy every time a large axis or spindle decelerates.<\/p>\n

You typically find the PSM-30 on larger machining centers and lathes \u2014 machines where a big spindle and heavy axes share one power supply. That duty cycle matters for reliability: every rapid deceleration of a large spindle pushes energy back through this module. Unsure how the PSM fits the rest of the Fanuc module family? Our A06B series model number guide<\/a> maps it out.<\/p>\n

A06B-6087-H130 Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nA06B-6087-H130<\/td>\n<\/tr>\n
Module type<\/td>\nFanuc Alpha PSM-30 (power supply module)<\/td>\n<\/tr>\n
Rated capacity<\/td>\n30 kW<\/td>\n<\/tr>\n
Input<\/td>\n3-phase, 200 V class mains<\/td>\n<\/tr>\n
Output<\/td>\nDC link for connected SVM servo and spindle amplifier modules<\/td>\n<\/tr>\n
Regeneration<\/td>\nRegenerative discharge to the line<\/td>\n<\/tr>\n
Series family<\/td>\nA06B-6087 (PSM power supply modules in multiple capacities)<\/td>\n<\/tr>\n
Closest sibling<\/td>\nA06B-6087-H126 (PSM-26, same platform, 26 kW)<\/td>\n<\/tr>\n
Status<\/td>\nLegacy series \u2014 no longer in active production<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\"A06B-6087-H130
A06B-6087-H130 Fanuc Alpha PSM-30 power supply module<\/figcaption><\/figure>\n

Common A06B-6087-H130 Failures We See in Our Repair Lab<\/h2>\n

The PSM-30 shares the classic power supply failure modes with its smaller siblings \u2014 but its regenerative workload adds a signature failure pattern of its own:<\/p>\n

    \n
  1. Regenerative circuit damage.<\/strong> The signature PSM-30 failure. Large spindles decelerating hard push serious energy back into the module. Over years, the regeneration components degrade \u2014 symptoms start as overvoltage alarms during spindle deceleration and end with a damaged converter section.<\/li>\n
  2. Converter \/ IGBT failure.<\/strong> Mains spikes, lightning, or a downstream short. Usually presents as instant fuse failure at power-on. Never just replace fuses and retry \u2014 find the short first.<\/li>\n
  3. Precharge \/ inrush circuit failure.<\/strong> The soft-start circuit that charges the DC link wears out on aging units. The module then fails to reach ready state or blows fuses at power-up.<\/li>\n
  4. Cooling fan failure.<\/strong> A 30 kW module without airflow overheats fast. On machines with heavy spindle duty, fan maintenance is cheap insurance.<\/li>\n
  5. Capacitor aging.<\/strong> After 15\u201320 years, dried-out capacitors cause erratic faults and poor ride-through on mains dips \u2014 often misread as “plant power problems.”<\/li>\n<\/ol>\n

    Getting overvoltage alarms when the spindle slows down? That pattern usually points at the PSM’s regenerative circuit. Send us the alarm code and when it occurs \u2014 our engineers will confirm before you order anything. support@cncouke.com<\/strong><\/p><\/blockquote>\n

    Overvoltage on Deceleration: The PSM-30’s Telltale Sign<\/h2>\n

    One diagnostic pattern is worth calling out because it is so common on PSM-30 installations:<\/p>\n

      \n
    1. Note when the alarm occurs.<\/strong> An overvoltage fault that appears specifically during spindle or axis deceleration points at the regeneration path \u2014 not at normal operation circuits.<\/li>\n
    2. Check the trend.<\/strong> Regenerative degradation is progressive. Alarms that were rare last year and weekly now mean the circuit is wearing out, and a full converter failure is coming.<\/li>\n
    3. Act before the hard failure.<\/strong> A planned repair of a degrading PSM costs less than an emergency replacement after the converter section goes \u2014 and it avoids the collateral damage a hard failure can cause to downstream amplifiers.<\/li>\n<\/ol>\n

      Compatibility: PSM-30, PSM-26, and the Upgrade Question<\/h2>\n