Product Description:

The TCM 1.1-08 is a capacitor module produced by Bosch Rexroth Indramat for the TCM Capacitance Modules series. It is wired across the DC link of Rexroth inverters where it supplements the internal smoothing capacitors, absorbs regeneration peaks, and provides short-term energy during rapid motor acceleration. By reducing voltage ripple on the common bus, this component helps maintain stable drive operation in multi-axis machining centers and transfer lines. Its passive design requires no active cooling, and it can buffer brief energy exchanges between braking and accelerating axes on a shared DC bus.

The energy reserve is fixed at 8 mF, which helps moderate bus transients that arise when several servo axes brake simultaneously. This stored charge can also reduce short bus-voltage dips when multiple axes accelerate in quick succession. The housing occupies a frontal width of 208 mm, so adjacent modules in a control cabinet must be spaced accordingly. A module depth of 105 mm allows installation in shallow enclosures while still leaving room for rear ventilation paths. Overall height reaches 390 mm, so the unit can share mounting rails with standard drive controllers without obstructing top cable ducts. Power leads of up to 6 mm² cross-section can be connected to the input terminals, supporting low-impedance connections to high-current bus bars.

Thermal dissipation and service access both matter during installation. A minimum front-side gap of 80 mm should be maintained to support natural convection and provide safe working space during maintenance. Bus and ground conductors are secured with M5 studs, and each fastener must be tightened to 2.5 Nm to keep contact resistance within the allowed limit. Even clamping pressure at these joints helps avoid localized heating during current surges on the DC bus. Maintaining cabinet airflow and preserving the required clearance around the module also help prevent hot spots near adjacent equipment.