Product Details

Baumuller 3.1516A, also marked as 31516A, paired with 3.1309C EP75R12KE3, is a matched set of control board and power module PCB for legacy Baumuller modular servo drive platforms. This control board works together with the power drive card to deliver power conversion, current detection and power stage protection. The power module PCB integrates the EP75R12KE3 power semiconductor, current sampling circuits and temperature monitoring to convert DC bus voltage into three‑phase AC power for the servo motor. The matched 3.1516A control section processes current feedback and communicates with the main controller to adjust output power dynamically. The multi‑layer FR4 circuit boards are conformal coated to protect traces and power components against dust, moisture and corrosive vapors inside industrial control cabinets. As obsolete and hard‑to‑source discontinued spares, this matched assembly is a required drop‑in replacement to restore power output and current closed‑loop regulation for ageing Baumuller servo drives.

Basic Parameters

Brand: Baumuller

Model: 3.1516A (31516A), 3.1309C EP75R12KE3

Product Type: Matched control and power module PCB assembly

Main Function: DC‑AC power conversion, phase current sampling, power semiconductor temperature monitoring, overcurrent and overtemperature protection, current feedback transmission

Interfaces: DC bus terminals, motor output terminals, backplane edge connector, temperature and fault signal pins, 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 logic circuits

Net Weight: Approximately 480 g

Condition: Original discontinued industrial spare

Supported Functions

This matched set supports high‑performance power output and real‑time current closed‑loop control for servo operation. The power module PCB with EP75R12KE3 power chip receives PWM drive signals from the gate drive board and outputs regulated three‑phase alternating current to the servo motor. It continuously samples phase current and monitors power device temperature, sending feedback data to the 3.1516A control board. It triggers fast shutdown when overcurrent, short‑circuit or overtemperature events are detected. It works cooperatively with the main control board, encoder interface board and gate drive board to realize stable torque, speed and position control. If this power drive card assembly fails, the servo drive cannot output motor power and will report power stage critical faults.

Core Functions

The core function of this assembly is to serve as the power conversion and current feedback core of the servo drive. The 3.1309C EP75R12KE3 handles high‑energy power switching, while the 3.1516A processes measured current signals and transmits status information to the drive controller. Built‑in thermal and current protection prevents catastrophic damage to power components under overload conditions. This power module PCB assembly is an indispensable spare to rebuild the power stage of legacy motion machinery and recover rated torque output.

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 PCB with high‑current power terminals

Protection: Overcurrent protection, short‑circuit lockout, overtemperature shutdown, ESD protection, IP20

Anti‑interference: Power and signal ground separation, high‑frequency absorption circuits to suppress electromagnetic noise inside cabinets

Compatibility: Suitable for legacy Baumuller modular servo drive units requiring this matched assembly

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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