Product Description:

The VT 3000-3X-ES43A8-2590 is an analog amplifier card produced by Bosch Rexroth Indramat for the VT 3000 Analog Amplifiers series. Mounted in hydraulic control racks, the unit translates low-level command voltages into proportional coil currents that drive servo and proportional valves in automated machinery such as presses, forming lines, and handling systems. By conditioning differential reference signals and supplying controlled current loops, the module provides a compact interface between PLC analog outputs and electrohydraulic actuators in closed-loop hydraulic circuits.

It follows the 32-pin Eurocard hardware format, allowing direct insertion into standardized DIN 41612 backplanes used in industrial control assemblies. The control path accepts an input control voltage range of ±9 V and an auxiliary command channel of ±6 V, both referenced to a 10 V differential input stage that maintains common-mode rejection. To prevent overloading of upstream sources, the input circuitry presents a minimum load of 500 Ω and provides four onboard potentiometers for gain and offset trimming. Four front-panel LEDs indicate supply status, signal presence, and error states during operation. The amplifier delivers a continuous output current from 20 mA to 800 mA, permitting direct connection to proportional valve coils while maintaining linear response. Temperature drift is limited to 0.5 ‰/K to keep calibration stable across normal cabinet temperatures.

The power section is fed by a regulated 24 VDC ±10% source and is protected by a 2.5 A fuse that disconnects the board under abnormal load or internal short conditions. Six onboard relays switch feedback paths and enable signals, while the driver stage is rated for coils up to 19.5 Ω, helping maintain full stroke on higher-resistance actuators used in hydraulic valve assemblies. Overall consumption does not exceed 30 W, keeping panel thermal load modest and supporting dense rack layouts with its 0.15 kg mass.