VT 5012S42

Product Description:

Bosch Rexroth Indramat manufactured the VT 5012S42 IO card. It relies on particular electrical conditions to operate stably. You'll see that input voltage is defined at 24 V DC, with a tolerance range that spans from 10% below to 40% above that. That gives you a functional voltage window of between 21.6 and 33.6 V DC. But what's really important here is that the card can tolerate brief exposure to absolute voltage limits of 21 V (minimum) and 35 V (maximum) without immediately failing. That's because the integrity of its internal semiconductors—like gate drivers, logic circuits and protection diodes—depends on those voltage parameters. If the voltage gets too far out of range, you can get over-voltage breakdowns or undervoltage lockouts. In terms of power demand, the IO card consumes up to 0.6 amps during standard operation and can spike to 1.25 amps under high load conditions. That puts strict requirements on power supply design and affects the card's internal thermal profile due to Joule heating. One of the key features of the VT 5012S42 IO card is its ability to drive industrial solenoids with high precision.

The card's output channel can deliver up to 2.5 amps to solenoids with a series resistance of about 2 ohms. That electrical setup directly impacts the electromagnetic force produced by the solenoid—and its mechanical response. You include that series resistance for a reason: it acts as a passive current limiter and damping element, modifying the RL time constant and influencing the actuation speed and control fidelity. Ohm's law dictates that this combination of output current and resistance yields a voltage drop the card must maintain across dynamic operating conditions. The timing architecture of the IO card is built around an internal oscillator that runs at 5.4 kHz. There's also an alternative frequency mode at 2.5 kHz ±10%. Those oscillator frequencies define the internal timing resolution and are critical for generating PWM control signals. When controlling solenoids, PWM lets you modulate effective current and thermal load while keeping the mechanical output consistent.

Higher oscillator frequencies enhance the resolution and responsiveness of control algorithms, reducing ripple and increasing positional accuracy—especially in rapidly changing systems. Sensor integration on the VT 5012S42 is comprehensive. It supports inductive transducers like swivel angle sensors (IW9, ±4 mm) and valve position sensors (DM2, ±0.6 mm). These devices operate on electromagnetic induction principles, where the displacement of a metal target alters the magnetic coupling and induces signal variations correlating to position. The sensor interfaces on the card accommodate both 3- and 4-conductor connections, corresponding to supply, ground and one or two signal lines depending on the sensor type. You also get dedicated measurement sockets—for analog signals up to ±10 V and pressure readings from 0…10 V (with a resistance of 2 kΩ)—which lets you monitor process variables in real-time without disrupting closed-loop control.