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BAUMULLER 3.1305A 31305A
1. Product Overview
The BAUMULLER 3.1305A 31305A is a high-performance automated drive and control component designed and manufactured by Germany-based Baumüller Group. As a core unit of the Baumüller b maXX series servo drive platform and its supporting peripheral systems, it functions as a multi-axis servo drive module, smart power module, or high-end axis control unit with Safe Torque Off (STO) capability.
This model is a highly integrated power electronic module built for high-standard industrial scenarios, not a universal standard part. It supports complex multi-axis synchronous motion control, efficient power conversion and distribution, and high-speed real-time data exchange within automation systems.
Acting as a dual hub for energy and signal transmission between intelligent controllers and servo motors, it guarantees real-time response, synchronous accuracy and dynamic performance of multi-axis linkage systems. It serves as the hardware foundation for advanced functions including complex trajectory interpolation, electronic cam, common DC bus, and high-level safety features such as Safe Stop 1 (SS1) and Safe Limited Speed (SLS).
Adopting industrial-grade power electronic devices including IGBT and IPM and advanced SMT mounting technology, the module features reliable industrial performance. It applies a compact modular design and supports standard DIN rail mounting or backplane plug-in installation for easy integration into control cabinets.
It achieves seamless compatibility with Baumüller b maXX series controllers, distributed I/O modules and HMI panels, building a high-consistency and high-performance motion control network. Ideal for new high-end CNC machine tools and automated renovation of old equipment, it delivers excellent dynamic response, control accuracy and operational safety.
2. Product Specifications
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Parameter Item
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Parameter Value
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Manufacturer
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Baumüller (Germany)
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Product Type
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High-performance servo drive / axis control module / smart power module (inferred)
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Product Series
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b maXX series drive platform (typical)
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Rated Input Voltage
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3-phase 400 VAC / 480 VAC (configuration-dependent)
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DC Bus Voltage
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540 VDC ~ 650 VDC (common DC bus compatible)
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Rated Output Current
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Several to tens of amperes (refer to nameplate for exact value)
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Peak Output Current
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1.5 ~ 2 times rated current (short-term overload tolerance)
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Control Mode
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Vector control / V/f control / servo control (configurable)
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Communication Interface
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SERCOS III, EtherCAT, PROFINET and other real-time industrial Ethernet (version-dependent)
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Safety Functions
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Integrated STO; optional SS1, SLS and other advanced safety functions (compliant with EN 61800-5-2)
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Installation Method
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DIN rail mounting / system backplane plug-in
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Ingress Protection
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IP20 (for cabinet installation)
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Operating Temperature
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0°C ~ +55°C (industrial ambient temperature)
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Certifications
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CE, UL, TÜV (typical)
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3. Structure & Composition
Without official internal structure drawings, the internal configuration of this model can be reasonably deduced based on mainstream high-performance servo drive design principles. Its core consists of a highly integrated multi-layer power board and logic control board. A 32-bit or 64-bit high-performance DSP or dedicated motion control processor serves as the main computing unit.
The module is equipped with high-speed RAM for data caching and stack processing, and large-capacity Flash memory for firmware storage and parameter power-off retention. Functionally, it is divided into three independent and collaborative zones.
Power Conversion & Drive Zone: The core energy processing unit, including rectifier units, DC bus capacitor arrays, and IGBT/IPM inverter units. It converts AC input to DC power and outputs adjustable AC power to drive servo motors. It also integrates over-current, over-voltage, over-temperature and short-circuit protection circuits.
Logic Control & Communication Zone: Adopts isolated high-speed bus transceivers for external network connection. It executes real-time OS scheduling, parses communication protocols, and operates closed-loop PID algorithms for current, speed and position control.
Power Management & Safety Monitoring Zone: Converts main power or external 24VDC control power into precise low-voltage power for internal circuits and external encoder interfaces. The suffix “KS” likely indicates enhanced safety circuits such as safety relays or optimized cooling substrates.
4. Core Features & Advantages
4.1 Excellent Drive Performance & Dynamic Response
Powered by high-performance DSP and advanced vector control algorithms, the module delivers high-speed and high-precision servo motor control. It features fast current loop response and accurate speed/position regulation, supporting microsecond-level command tracking and nanosecond-level clock synchronization for multi-axis systems. It effectively reduces trajectory errors and improves machining quality for high-speed placement machines and complex CNC centers.
4.2 High Integration & System Compatibility
Fully compatible with Baumüller b maXX series servo motors and I/O systems, it enables seamless end-to-end connection from controllers to actuators. Integrated STO, SS1 and other safety functions comply with international standards, realizing safe equipment shutdown without external safety relays. This saves cabinet space and reduces system costs. Supporting mainstream industrial Ethernet protocols, it adapts to mixed-brand control architectures and offers flexible design options.
4.3 Industrial Durability & Efficient Heat Dissipation
Built with wide-temperature high-quality components and passing strict EMC tests, the module adapts to harsh industrial environments. Its optimized thermal management system (improved air duct or aluminum heat sink) ensures stable temperature control under continuous high-load operation. It delivers low failure rates and long MTBF, guaranteeing long-term stable production.
5. Application Fields
this model is designed for high-end mechanical equipment requiring ultra-high motion accuracy, dynamic response and system safety.
In printing and papermaking industries, it drives multi-color rollers of high-speed rotary printing machines to achieve precise color registration synchronization. In plastic processing, it supports full-electric injection molding machines with accurate closed-loop control of injection pressure, mold clamping and ejection actions.
It also serves metal processing equipment such as CNC lathes, milling machines and 5-axis machining centers. In robotics, it acts as a core drive unit for SCARA, Delta and 6-axis industrial robots to realize smooth trajectory planning. It solves common industrial pain points including large contour errors, delayed dynamic response and insufficient safety protection for multi-axis collaborative operation.
6. Related Products
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BAUMULLER 3.0404KS11.03: Previous hardware/firmware version with differences in safety level or communication protocols.
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BAUMULLER 3.0404KS12.04: Higher-power variant for high-torque servo motor driving.
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BAUMULLER BM5-O-CAN: CANopen master/slave communication module for network expansion and distributed I/O connection.
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BAUMULLER GSU Series: Matching servo motors as the executive unit for speed and torque execution.
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BAUMULLER CAN-DI-16-01: 16-channel digital input module for on-site signal collection expansion.
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BAUMULLER BM5-P-ETH: PROFINET/EtherNet/IP gateway for connecting drive systems to factory management networks.
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BAUMULLER 3.0041F5.1: High-end core controller for issuing upper-level motion control commands.
7. Installation & Maintenance
7.1 Pre-installation Preparation
Ensure the cabinet meets IP20 protection standards and the ambient temperature stays within 0°C to +55°C. For DIN rail mounting, clamp the module firmly in place. For backplane installation, push the module steadily until the locking mechanism clicks.
Cut off the total system power and wait at least 5 minutes for DC bus capacitor discharge before wiring. Use shielded cables for power and motor lines with single-end grounding on the cabinet side to suppress electromagnetic interference. Connect the grounding terminal to the cabinet main ground bar with sufficient-section wires.
7.2 Maintenance Guidelines
This highly integrated module requires minimal daily maintenance. Check indicator status (power, RUN, ERR, STO) quarterly, and inspect all wiring terminals for looseness or overheating discoloration. Keep the cabinet interior dust-free and ensure smooth heat dissipation and normal fan operation.
Recheck all connectors and terminals after hardware replacement or circuit modification. For faults such as over-current or over-temperature alarms, replace the module with a qualified spare part on site and return the faulty unit to the factory for professional failure analysis (on-site power device repair is not recommended).
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