Product Description
Rexroth VT-VRRA 1-527-11/V0 0811405123
The Rexroth VT-VRRA 1-527-11/V0 (Bosch Rexroth part number 0811405123) is an analog amplifier card specifically engineered for controlling proportional pressure valves that do not have electrical position feedback. This amplifier, designed in the standard Eurocard format, converts an analog input signal (voltage or current) into a corresponding regulated current for the valve’s solenoid. It features adjustable ramp times for smooth valve operation, multiple command value call-ups for versatile control scenarios, and a “ready for operation” signal. This component is essential for hydraulic systems requiring precise and reliable pressure regulation.
Technical Specifications:
- Product Type: Analog amplifier for proportional pressure valves (without electrical position feedback)
- Series: VT-VRRA 1
- Model Code: 527-11/V0
- Format: Eurocard (100 x 160 mm)
- Operating Voltage: 24 VDC (nominal)
- Power Consumption: Max. 30 VA
- Command Value Input: Differential input; 0 to +10 V (Ri > 100 kΩ) or 4 to 20 mA (Ri = 100 Ω)
- Solenoid Output Current: Max. 1.6 A (PWM controlled)
- Ramp Generator: Separately adjustable ramp times for “up” and “down” (typically 0.02 s to 5 s)
- Command Value Call-ups: Yes, typically 4 call-ups (e.g., KA1 to KA4) via control inputs
- “Ready for Operation” Output: Transistor output (max. 50 mA, short-circuit proof)
- Connection: 32-pin male multipoint connector, type F according to DIN 41612
- Operating Temperature Range: 0 °C to +50 °C (32 °F to 122 °F)
- Storage Temperature Range: –20 °C to +70 °C (–4 °F to 158 °F)
- Protection Features: Short-circuit proof solenoid output, reverse polarity protection for power supply
- Compatibility: Designed for proportional pressure valves such as Rexroth .DBE. and .DBEM. series
Rexroth VT-VRRA 1-527-11/V0 0811405123
Model：Rexroth VT-VRRA 1-527-11/V0 0811405123
