Product Description:

The BZM01.3-01-07 is an auxiliary bleeder module produced by Bosch Rexroth Indramat within the Auxiliary Bleeders series. Installed alongside drive controllers, it absorbs regenerative energy that returns to the shared DC bus during motor braking, helping keep bus voltage within its allowable range and reducing nuisance shutdowns. The module routes excess energy through an internal resistor network and releases it as heat. In multi-axis systems, this function helps stabilize the common power section when several axes decelerate at the same time. This makes it suitable for applications with high-inertia loads, fast deceleration, or vertical axes that feed braking energy back into the drive system.

Its continuous thermal capacity is rated at 1 kW, which is the amount of power it can dissipate without interruption under normal operating conditions. For short intervals, the resistor stage can absorb up to 40 kW of returning energy during rapid stops or aggressive braking. The associated drive package operates on a 700 V DC link. Control electronics require DC 24 V ±20% at connector X4, and current draw is limited to 90 mA, which keeps the auxiliary supply demand low. Because the control supply is separate from the braking path, the monitoring circuit can remain active while the resistor stage is ready to switch on when bus voltage rises.

The module uses Design Version 3 and Series Version 1. These version codes identify the product build used for this bleeder type and help distinguish it from other revisions in the same line. The unit is intended for compatible drive assemblies that need a separate path for dissipating regenerative energy outside the main controller. This arrangement is useful where regenerated energy cannot be returned to the mains and instead must be converted directly into heat inside the cabinet system. During repetitive deceleration cycles, the bleeder resistor helps limit overvoltage on the DC bus while the drive continues normal braking operation.