Product Description:

The VT-VRPD-2-23/V0/0-0-1 electronic amplifier is produced by Bosch Rexroth Indramat for the VT-VRPA Electric Amplifiers series. It conditions command signals, monitors feedback, and drives proportional solenoids in hydraulic or pneumatic axes used within automated machinery. By combining analog reference handling with digital diagnostics, the module serves as an interface between a PLC and a valve coil. It converts low-level setpoints into controlled current while capturing operational data for maintenance.

Its signal stage accepts a differential analog input, reducing common-mode noise when wiring runs through plant conduits. The reference channel provides a stable range from -10 V to +10 V with a 0.5% tolerance, allowing external motion controllers to scale position or pressure commands accurately. Digital enable lines treat any level above 24 V as high and 0 V as low, providing straightforward compatibility with standard PNP outputs. Configuration data is stored as 16 selectable setpoints that operators can choose through the RS-232 service port. This port communicates at 57,600 baud for rapid parameter loading. Each detected fault triggers an automatic shutdown, followed by a five-second pause before operation resumes, allowing the machine controller to record the event before power is reapplied.

The power stage supports solenoid cables up to 50 m long when 1.5 mm² conductors are used. Transducer feedback can be routed over the same distance with 0.25 mm² conductor pairs without reducing accuracy. Output modulation includes a one-step pulse width of 0.5 s and a ten-step pulse width of 2 s, which support controlled manual jogging and adjustment. These timing options allow brief or extended output changes without requiring continuous input commands. A circular fault-history buffer stores up to 16 events for later review when intermittent operating issues occur. As new faults enter a full buffer, they replace the oldest records so the most recent operating events remain available.