Product Details

Baumuller 3.0308F is a dedicated current transformer board and signal sampling PCB built for legacy Baumuller modular servo drive systems. This current transformer board captures real-time motor phase current, converts high-power current signals into low-voltage analog feedback through built-in transformers and precision conditioning circuits, and transmits valid sampling data to the main control unit. The signal sampling PCB adopts isolation design to separate high-voltage power circuits from sensitive low-voltage control circuits. With conformal coated multi-layer FR4 substrate, it resists dust, moisture and corrosive vapors in industrial control cabinets. As an obsolete discontinued spare part, it acts as a reliable drop-in replacement to restore precise current sampling and overcurrent protection for aging servo drives.

Basic Parameters

Brand: Baumuller

Model: 3.0308F

Product Type: Current transformer board, phase current sampling PCB card

Main Function: Motor phase current acquisition, galvanic isolation, analog signal conversion, overcurrent pre-detection, current feedback sampling

Interfaces: Power sensing terminals, backplane edge 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

Auxiliary Supply: 24 V DC for signal circuits

Net Weight: Approximately 300 g

Condition: Original discontinued industrial spare

Supported Functions

This current transformer board supports continuous high-precision phase current sampling for closed-loop torque regulation. It detects instantaneous current of each motor phase and sends proportional sampled signals to the master control board for real-time torque calculation. The signal sampling PCB continuously monitors sudden current surges and sends pre-alarm signals to trigger fast shutdown, protecting the IGBT power stage from burnout. It works cooperatively with the main control board, gate drive board and DC-link power board to maintain stable dynamic current control. If this card fails, the drive will trigger current feedback faults and lose normal torque control.

Core Functions

The core function of this current transformer board is isolated phase current sensing for servo drives. It converts large motor operating currents into measurable low-level analog feedback signals required by motion control algorithms. It provides reliable electrical isolation between high-power loops and logic circuits to improve equipment and operator safety. As a replacement spare, this signal sampling PCB rebuilds the current feedback and hardware protection loop of legacy motion equipment to avoid unexpected power stage damage.

Hardware Specifications & Environmental Features

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -20°C ~ +75°C

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

Housing: Bare PCB assembled with integrated current transformers

Protection: Galvanic isolation, overcurrent pre-alert, ESD protection for signal ports, IP20

Anti-interference: Shielded sensing loops and multi-stage filtering circuits to suppress electromagnetic noise inside cabinets

Compatibility: Suitable for legacy Baumuller modular servo drive units

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.

available stock.xlsx