Product Description:

The TVM 1.2-050-W1-115 is a power supply module manufactured by Bosch Rexroth Indramat for the TVM Power Supply Modules series. It converts incoming AC mains into a regulated DC bus and distributes auxiliary low-voltage rails required by Indramat servo drives and control electronics. Configuration code 2 identifies the wiring layout used inside the housing, and an integral fan on the front panel pushes air across the heat sinks so the module can be mounted inside enclosed automation cabinets.

This power unit provides a continuous output current of 25 A, which is the maximum steady-state load it can support on the drive bus without thermal derating. The internal rectifier maintains a bus potential of 300 VDC when the terminal block is supplied with the nominal line of 220 VAC. Under these conditions, the module can deliver up to 15 kW to connected inverters. Regenerative braking energy is dissipated through an onboard bleeder resistor that can continuously absorb 0.30 kW, which helps prevent the DC link voltage from rising beyond safe limits during deceleration cycles. Auxiliary outputs supply +15 V and -15 V at 0.85 A each, and a separate +24 V rail at 4 A powers contactors and logic interfaces. The cooling fan draws 30 W and is protected by a 0.630 A fuse.

Short-term transients are handled by a peak current capability of 150 A for 300 ms, allowing the module to ride through simultaneous motor startups. The energy storage network can accept up to 14 kWs of returned energy before the bleeder activates, supporting frequent stopping operations in indexing machinery. Internal resistive and switching elements generate a maximum power loss of 550 W, and the integrated 115 VAC fan removes this heat to keep component temperatures within acceptable limits. The cast-aluminum enclosure and magnetic components contribute to a total weight of 15 kg, which must be supported by the control cabinet's mounting rails.