Product Description:

Bosch Rexroth Indramat manufactures the VT 3000 S 35-R1, an analog amplifier card in the VT 3000 Analog Amplifiers series. The module converts low-power control references into controlled current for proportional coils, allowing automation controllers to modulate actuators directly from cabinet racks. Designed for DIN-format assemblies, it fits standardized carrier frames so signal conditioning, load driving, and protective functions remain on a single plug-in board. This arrangement keeps the control section compact and suits cabinet-based valve and actuator control where stable analog regulation is required.

The amplifier draws its logic and power circuitry from a 24 VDC bus that tolerates a ±10% deviation, eliminating the need for dedicated regulators. Command inputs span ±9 V, and the card presents a minimum loading of 500 Ω to upstream controllers. A standing bias of 20 mA is delivered at the output to keep connected valves responsive during small command changes, while demand current can rise to 800 mA when full stroke is needed. To reach that peak, the coil resistance must not exceed 19.5 Ω. Circuit protection is supplied by a slow-blow, board-mounted fuse rated at 2.5 A. Only the conductor side occupies a single rack pitch, which leaves room for field wiring and adjacent modules in dense cabinet layouts.

Total device dissipation is limited to 30 W, permitting passive panel cooling in many enclosures. The output drift is specified at 0.5 ‰ (Fmax)/K, so current regulation changes predictably with temperature during normal operation. Reliable operation is declared from 0 °C up to 50 °C, a range that covers typical indoor industrial conditions without extra climate control. The housing takes up 1 TE of horizontal space and weighs 0.15 kg, which helps with dense card stacking and reduces mechanical loading on the backplane. The amplifier’s continuous heat load should be included in cabinet airflow planning so nearby modules are not exposed to unnecessary temperature rise.