Description

The Indramat TDM3.2-20-300-W0 is a high-performance, wall-mounted servo drive from Bosch Rexroth’s legacy Indramat product line, engineered for precise motion control in demanding industrial automation applications. As part of the TDM3.2 series—a modular family of analog-controlled servo amplifiers—the Indramat TDM3.2-20-300-W0 delivers a continuous output current of 20 A at a DC bus voltage of up to 300 V, making it ideal for driving medium-power permanent magnet synchronous motors (PMSMs) and brushless DC motors in CNC machines, robotics, printing presses, and packaging systems. Designed for integration into centralized or decentralized drive architectures, this unit operates via analog ±10 V velocity/torque command signals and supports incremental encoder feedback (typically TTL or RS422), enabling closed-loop control with high dynamic response and positioning accuracy.

Positioned as a rugged, field-proven solution for both new installations and brownfield retrofits, the Indramat TDM3.2-20-300-W0 features comprehensive protection mechanisms—including overcurrent, overvoltage, undervoltage, overheating, and short-circuit safeguards—to ensure operational continuity in electrically noisy or thermally challenging environments. Its “W0” suffix denotes a standard wall-mount configuration without integrated line filter, allowing flexible integration into custom electrical cabinets with external filtering per site requirements. Despite being part of a legacy platform, the Indramat TDM3.2-20-300-W0 remains widely supported in global manufacturing due to its reliability, serviceability, and compatibility with existing Indramat motor ecosystems.

Technical Specifications

Main Features and Advantages

Analog simplicity with high dynamic performance: The Indramat TDM3.2-20-300-W0 uses straightforward ±10 V analog command signals, eliminating the complexity of fieldbus configuration while delivering sub-millisecond current loop response times. This makes it exceptionally well-suited for high-speed applications like web tension control, flying shear, or robotic pick-and-place where deterministic behavior is critical.

Robust thermal and electrical design: Equipped with an internal heat sink and forced-air cooling option (via optional fan kit), the Indramat TDM3.2-20-300-W0 maintains stable operation even under sustained 150% overload conditions. Its power stage employs high-reliability IGBT modules with snubber circuits to suppress voltage spikes from inductive loads, extending both drive and motor life.

Seamless integration with Indramat motors: The drive is fully compatible with Indramat’s MDD, MKD, and MSK motor families, automatically recognizing motor parameters when used with appropriate tachometer or encoder feedback. Diagnostic LEDs on the front panel provide immediate status indication for ready, fault, and enable states, accelerating commissioning and troubleshooting.

Legacy support with modern relevance: Although superseded by digital platforms like IndraDrive, the Indramat TDM3.2-20-300-W0 continues to be specified in maintenance and spare parts programs worldwide. Its modular architecture allows easy replacement without rewiring entire cabinets, and Bosch Rexroth still provides firmware documentation, repair services, and cross-reference guidance for migration planning.

Application Field

The Indramat TDM3.2-20-300-W0 is commonly found in industries requiring high-precision, high-torque servo control with proven reliability. In metalworking and woodworking CNC machinery, it powers spindle orientation, tool changers, and linear axis drives—often synchronized across multiple axes for contouring operations. Within the printing sector, the Indramat TDM3.2-20-300-W0 controls impression rollers, register correction systems, and unwind/rewind shafts, maintaining micron-level registration at high web speeds.

In automated assembly lines, particularly in automotive component manufacturing, this drive actuates robotic arms, part feeders, and press-fit stations where repeatable torque control prevents damage to delicate parts. Similarly, in food and pharmaceutical packaging, the Indramat TDM3.2-20-300-W0 drives form-fill-seal mechanisms, cappers, and label applicators under stringent hygiene and uptime requirements. Its ability to operate reliably in environments with wide temperature swings, dust, and electrical interference ensures consistent performance in both factory floors and outdoor processing units.

Related Products

TDM3.2-15-300-W0: Lower-current variant (15 A) for lighter-duty axes.
TDM3.2-30-300-W0: Higher-power version (30 A) for heavy-load applications.
DKC02.3: Digital successor platform with Sercos III and EtherCAT support.
HCS02: Compact digital servo drive for space-constrained installations.
MDD035B: Compatible Indramat servo motor often paired with TDM3.2 drives.
MKD041B: High-inertia servo motor for direct-drive rotary tables.
RAC2.1: Regenerative power supply unit for multi-axis TDM3.2 systems.
AFE: Active front end for energy recovery in large-scale installations.

Installation and Maintenance

Pre-installation preparation: Before installing the Indramat TDM3.2-20-300-W0, ensure adequate clearance for airflow (minimum 100 mm on all sides if using forced cooling) and verify that the DC bus voltage from the rectifier or regenerative unit falls within the 200–300 V range. Confirm that motor encoder cables are shielded and grounded at one end only to prevent ground loops. Connect the analog command signal, enable signal, and feedback lines according to the terminal diagram, double-checking polarity to avoid damage. Secure the Indramat TDM3.2-20-300-W0 to a flat, vibration-free mounting surface using the provided brackets.

Maintenance recommendations: Regularly inspect cooling vents for dust accumulation and clean with dry compressed air during scheduled outages. Monitor the green “Ready” LED during operation; a red “Fault” LED indicates issues such as overtemperature or overcurrent—consult the status code table in the manual for diagnosis. Check terminal tightness annually to prevent arcing. If the drive exhibits erratic behavior, verify encoder signal integrity with an oscilloscope. Keep a spare Indramat TDM3.2-20-300-W0 on hand for rapid replacement, as these legacy units may have extended lead times.