Product Details

Baumuller 3.0311A 3.5, also marked as 30311A 35, is a version 3.5 auxiliary power supply board and drive power PCB for legacy Baumuller modular servo drive systems. This power supply board converts the internal bus voltage into stable regulated low-voltage DC power to feed all logic boards, sensor circuits and indicator LEDs inside the servo unit. The drive power PCB integrates rectification, filtering, voltage regulation and short-circuit protection circuits to deliver clean, steady power for reliable operation of the whole control system. This specific 3.5 version features optimized regulation stability and improved ripple suppression compared with earlier revisions. Built on multi-layer FR4 substrate with conformal coating, it guards electronic traces against dust, moisture and corrosive vapors within industrial cabinets. As an obsolete and hard-to-source discontinued spare, it acts as a matched drop-in replacement to restore stable auxiliary power supply for ageing Baumuller servo drives.

Basic Parameters

Brand: Baumuller

Model: 3.0311A 3.5, alternative marking: 30311A 35

Product Type: Auxiliary power supply board, drive power PCB card

Main Function: DC voltage conversion, voltage regulation, ripple filtering, short-circuit protection, auxiliary power distribution

Interfaces: DC bus input terminals, backplane power connector, status LED indicators

PCB Treatment: Conformal coated multi-layer circuit board, UL 94V-0 flame retardant

Mounting: Internal plug-in installation inside compatible Baumuller servo drive housing

Output: Multiple regulated low voltage rails for internal electronics

Net Weight: Approximately 260 g

Condition: Original discontinued industrial spare

Supported Functions

This power supply board provides continuous regulated auxiliary power for every internal sub-board of the servo drive. The drive power PCB maintains stable output under transient load changes when the servo starts, accelerates or brakes. It triggers automatic shutdown protection in case of output short circuit or overloading to prevent damage to downstream control boards. It works together with the main control board, sampling boards and communication boards to guarantee normal drive initialization and steady running. If this auxiliary power card fails, the servo cannot power up properly and all control functions will be unavailable.

Core Functions

The core function of this power supply board is to supply reliable, isolated low-voltage auxiliary power for the servo drive’s control and sensing circuits. It converts raw bus power into well-regulated power rails required by all electronic sub-modules. It includes built-in fault protection to avoid cascading component failure. This drive power PCB serves as a critical spare to rebuild the internal power distribution system of legacy motion machinery and avoid unexpected equipment downtime.

Hardware Specifications & Environmental Features

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -20°C ~ +75°C

Relative Humidity: 5%–95%, non-condensing

Housing: Bare coated power PCB with power terminals

Protection: Overload protection, short-circuit lockout, ESD protection, IP20

Anti-interference: EMI filtering and shielded power traces to suppress electromagnetic noise inside cabinets

Compatibility: Suitable for legacy Baumuller modular servo drive units requiring version 3.5

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm 800 series backplane compatibility, pulse signal type, counting mode and preset logic before ordering.

This is from our current stock.

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