Product Description:

The 1070077616-208 is a drive module from Bosch Rexroth Indramat's DM Servo Drives series. Installed inside machine cabinets, it supplies regulated power to synchronous or asynchronous motors in packaging, handling, and general automation equipment. It interfaces with higher-level motion controllers through analog setpoints and discrete I/O, so separate proprietary fieldbus modules are not required for basic command exchange. By combining speed and torque control with resolver feedback, the device closes the electrical loop between a high-voltage DC bus and the mechanical axis. This arrangement supports quick response to load changes and stable operation during long production runs.

Control electronics draw 0.89 A from the 24 V service rail. The power stage operates on a DC link kept between 670 VDC / 715 VDC. Momentary load demands can reach 6.6 Arms, while continuous heat dissipation is limited to 96.5 W. The IGBTs switch at 8 kHz, and separate 4 kHz and 8 kHz derating curves are provided for thermal planning. Analog 12-bit speed or torque commands enter through the setpoint interface, and actual velocity is reconstructed from the resolver encoder. Status voltages proportional to torque can be monitored on the same connector for signal observation during setup. The housing dimensions allow the module to fit into narrow, fan-assisted racks.

Ambient temperature affects current capacity. At 4 kHz, the slope is 0.15 A/K. At the full carrier frequency, the decline relaxes to 0.10 A/K. Position feedback resolves to 12 bits, matching the command granularity and helping the regulator respond in a predictable way. Despite an integrated line filter and metal baseplate, mass remains 6.0 kg, which keeps cabinet loading moderate. A selectable synchronous-or-asynchronous motor parameter allows one hardware type to serve mixed-axis machines with different motor types.