VT-2000-A52

Product Description:

Bosch Rexroth Indramat manufactured the VT-2000-A52. To provide long-term operation and interoperability with industrial automation systems the VT-2000-A52 proportional amplifier relies on a well-defined electrical specification. Although the amplifier can tolerate a wide range of 22VDC to 35VDC (+40% to -5%), the fundamental supply voltage is 24VDC. This tolerance is wide enough to account for the power supply fluctuations that are common in industrial environments. By allowing these variations without compromising performance, circuit stress and failures due to voltage or thermal derating can be avoided. By keeping internal signal processing and power regulation circuits within their specified ranges, the design flexibility improves reliability and prevents errors due to low voltage or over-voltage stress on sensitive components. Keeping input conditions steady further increases the amplifier and its peripherals life time. The VT-2000-A52 power consumption is tuned for thermal stability and energy efficiency. The amplifier has a low electrical footprint, which is important in control systems where many power-dense components are packed in small cabinet areas by drawing less than 25VA of apparent power and less than 1A of current.

In addition to protecting against prolonged overcurrent events that can cause thermal fatigue or internal damage, this kind of fuse is also resistant to transient surges that can occur during initial energization or quick load changes. When combined, these features reduce thermal cycle stresses, protect upstream components and ensure steady energy consumption. Key signal modulation parameters inside the VT-2000-A52 allow to control of hydraulic actuators with precision. The ramp time controls the output current slew rate in response to the control input. It can be set from 30ms to 1 or 5 seconds, depending on the jumper S1. This has a direct impact on the actuator acceleration profile and is important for dynamic tuning and mechanical stress management. By compensating deadband effects and reducing system latency, this pre-biasing improves control loop accuracy.

The PWM frequency used to modulate the solenoid current is another important control parameter. Jumper S2 on the VT-2000-A52 allows to switch between 100Hz and 200Hz (+/-10%). Lowering the current ripple with a higher modulation frequency improves valve performance and reduces mechanical oscillations and audible noise. Based on a coil resistance of 19.5Ω at 20°C, the output solenoid current is set to 800mA with a tolerance of +/-10% to -5%. The position and force response of the actuator is determined by this current level, which is important to ensure the right magnetic force is applied to the valve spool. A 32-pin DIN 41 612 form D male connector and standard Euro-card dimensions (100x160mm) allow easy integration, and the front panel dimensions meet industry standards (3HE x 3TE front, 1TE rear). Auxiliary electronics like sensors or signal conditioning modules can be powered via its ±9V regulated output (+/-1%) that can source ±25mA.