Product Description:

The TBM 1.2-40-W1-220/S100 bleeder module is produced by Bosch Rexroth Indramat within the TBM Bleeder Modules series. Installed across the DC link of an Indramat converter, it dissipates surplus regenerative energy as heat and keeps the bus voltage within safe limits during braking cycles in industrial automation cells. It acts as an auxiliary load that protects connected power sections from overvoltage trips during rapid deceleration or repeated load reversals. This role is especially useful on axes that return energy to the drive when a moving load is slowed or reversed. In applications with frequent starts and stops, it helps prevent the DC link from rising faster than the converter can tolerate.

At the electrical interface, the resistor stack supports a peak dissipation of 40 kW, enabling short-term energy absorption when a servo axis returns power to the drive. An auxiliary centrifugal blower powered at 220 VAC pushes cooling air through internal channels, and its supply conductors land on terminals that accept wire up to 2.5 mm². Thermal management uses internal air cooling, so the installation requires a clearance of 80 mm above and below the housing for unobstructed airflow. This airflow helps carry heat away from the resistor assembly during repeated braking events. The air path should remain open, since blocked space above or below the housing reduces heat removal. Control terminals share the same wire capacity for signal leads, and the factory jumper between the resistor bed and the power bus can be extended only to the specified 1 m maximum lead length.

Overall depth is limited to 105 mm, while the front face measures 208 mm wide and 390 mm high, allowing placement beside standard drive controllers on a 400 mm panel. The shallow depth helps the module fit enclosures where rear clearance is limited. Power conductors that carry brake energy connect to cage clamps rated for 10 mm² wire, which offers lower impedance than the smaller control leads. The tall front face leaves room for vertical terminal access and adjacent component placement. Terminal orientation aligns with the airflow path, minimizing cable obstruction and helping maintain the required clearance around the housing.