Product Description:

The VT-VPCD-1-16/V0/1-0-1 is an electronic drive card produced by Bosch Rexroth Indramat within the VT-VPCD Drives series. Designed for closed-loop control of proportional valves, the card converts digital setpoints into analog signals that scale hydraulic flow or pressure in automated machinery. By integrating signal conditioning, power regulation, and serial diagnostics on one board, it links field controllers to valve actuators and maintains deterministic motion in pressing, molding, and metal-forming lines. This layout also lets the control system interface directly with hydraulic valve electronics without a separate external converter stage.

In operation, the card is supplied with 24 VDC, a level common to cabinet power buses, and it derives the internal references from this source. When a host issues a command, the board reproduces that request on the analog channel as ±10 V, allowing symmetric control of valves that need bidirectional modulation. The current command input path presents 100 Ω of resistance, so PLC output stages see a predictable load during 4–20 mA transmissions. A separate voltage command input is buffered by 100 kΩ of resistance, minimizing current draw from analog output cards that send 0–10 V setpoints. For onboard logic signaling, each digital output can sink or source up to 30 mA, enough to drive indicator LEDs or opto-isolated feedback lines without external relays.

Power budgeting and update timing are governed by additional limits. The board draws a peak of 3.5 A during solenoid energization and internal relay pull-in, so the 24 V feeder must tolerate that inrush. Supply tolerance spans 21 V to 30 V, giving headroom for battery-backed systems that may droop during startup yet climb when chargers are engaged. A minimum load of 1 kΩ is required on the analog output to prevent saturation when valves are disconnected. The controller scans all inputs and refreshes outputs every 2 ms, a rate that coordinates with RS-232 diagnostics over a 9-pin D-Sub and helps the hydraulic response stay consistent during changing process conditions.