Rexroth VT-VSPA2-1-11/T1 Proportional Valve Amplifier

Description

Rexroth VT-VSPA2-1-11/T1 Proportional Valve Amplifier

Product Dimensions：

The Bosch Rexroth VT-VSPA2-1-11/T1 is an analog proportional amplifier card designed to control proportional valves without electrical feedback (such as proportional pressure valves, proportional directional valves, etc.). It utilizes the standard Eurocard format and is specifically designed to convert input analog control signals into the current required to drive proportional solenoids.

Product Details

The VT-VSPA2-1-11/T1 is a classic analog amplifier card from Rexroth. The model designation is broken down as follows:

VT: Hydraulic amplifier/control card series
VSPA2: Proportional valve driver for valves with one or two proportional solenoids
1: Series 1 (design code)
11: Component series 11
T1: Specific functional configuration (e.g., includes ramp generator and specific input voltage/current settings)

The amplifier card incorporates voltage regulation circuitry, command value processing, a ramp time generator, a pulse-width modulation (PWM) output stage, and a constant-current controller for the solenoid; this ensures that the solenoid output remains unaffected by temperature fluctuations or changes in coil resistance.

Key Technical Specifications

Parameter Item Specification / Characteristic
Operating Voltage (U_B) 24 V DC (18 V ~ 30 V DC)
Power Consumption < 50 VA
Control Input Signal 0 ~ +10 V or 4 ~ 20 mA (adjustable/jumper settings)
Max. Output Current Approx. 1.6 A ~ 2.7 A (depending on adjustment and load)
Form Factor Eurocard format (100 x 160 mm), compliant with DIN 41494
Connector Specification 32-pin DIN 41612, Type F
Ramp Adjustment Time 0.05 s ~ 5 s (independently adjustable per channel)
Operating Ambient Temp. 0°C ~ +50°C

Key Advantages

Precise Output Control: Utilizes high-frequency pulse-width modulation (PWM) and constant-current control technology to effectively compensate for resistance changes caused by solenoid coil heating, ensuring precise valve spool positioning. Flexible Ramp Time Adjustment: Onboard potentiometers allow for independent adjustment of rise and fall ramp times, enabling smooth control of hydraulic movements and minimizing mechanical shock.
High Reliability and Stability: Features a proven analog circuit design with strong interference immunity, making it suitable for harsh industrial environments.
Easy Maintenance and Replacement: Utilizes a standard Eurocard plug-in design for installation in 19-inch racks or compatible bases, facilitating quick maintenance and component replacement.

Usage and Installation Precautions

Avoid Live Insertion/Removal: Do not insert or remove the amplifier card while the power is on; doing so can easily damage the output power transistors and the motherboard socket.
Shielding and Grounding: Control signal lines (0-10V/4-20mA) must use twisted-pair shielded cables with the shield grounded at one end only to prevent high-frequency noise from interfering with analog signals.
Power Supply Quality: Requires a stable 24V DC power supply with low ripple (less than 10%) and sufficient capacity margin.
Heat Dissipation: Ensure the installation rack is well-ventilated; the ambient temperature must not exceed 50°C.
Adjustment Sequence: After installing a new card, first adjust the Zero and Gain settings, then adjust the Ramp time based on actual operating conditions to prevent solenoid coil damage caused by excessive current.

Typical Application Scenarios

Plastics Machinery: Proportional control of pressure and flow for injection molding and blow molding machines.
Metal Forming Equipment: Proportional valve driving for hydraulic presses, bending machines, and stamping presses.
Metallurgy and Heavy Industry: Proportional valve speed control for rolling mill hydraulic systems and blast furnace control systems.
General Industrial Hydraulics: Signal amplification and control for proportional valve systems without electrical feedback, such as lifting platforms and machine tool hydraulic stations.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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