Rexroth VT-VSPA2-1-20VOT1 901002090 Analog Amplifier Board

Description

Rexroth VT-VSPA2-1-20VOT1 901002090 Analog Amplifier Board

Product Dimensions：

Here is the detailed product documentation for the Bosch Rexroth VT-VSPA2-1-20/V0/T1 analog amplifier card (Material Number: R901002090).

1. Product Description

The Rexroth VT-VSPA2-1-20/V0/T1 is an analog amplifier card designed in Eurocard format (100 \times 160 mm) to control proportional hydraulic valves without electrical position feedback.

As part of the VT-VSPA2-1-2X series, this card translates standard electrical command values (voltage inputs) into a regulated, pulse-width-modulated (PWM) current to control proportional solenoids. It serves as a modern, high-compatibility replacement for older generation Rexroth amplifier cards.

Retrofitting Note: The VT-VSPA2-1-20/V0/T1 is a direct functional replacement for legacy models such as VT 3000-3X, VT 3013-3X, VT 3014-3X, VT 3026-3X, as well as first-generation VT-VSPA2-1-1X/T1 cards.

2. Technical Parameters

The primary specifications for the card are detailed below:

3. Product Advantages

• Universal Compatibility: Configurable via onboard jumpers and potentiometers to precisely match various proportional valve types, eliminating the need to stock multiple unique amplifier boards.
• Comprehensive Adjustability: Features independent adjustments for the zero point, maximum command values, ramp times (up and down separately), and step levels.
• Onboard Diagnostic Features: Integrated measuring sockets on the front panel allow users to check the internal actual current value and command status without breaking the wiring circuit.
• Robust Circuit Protection: Equipped with reverse polarity protection for the incoming power supply, and short-circuit-proof outputs for the solenoid connections.
• Optimized Dynamic Response: Built-in characteristic curve generators adjust for the non-linear properties of proportional solenoids, guaranteeing smooth and predictable hydraulic flows.

4. Key Applications

This amplifier card is broadly utilized across industrial hydraulics where precise speed, direction, or force control is needed.

• Valve Control: Primarily engineered to drive Rexroth proportional directional control valves without electrical position feedback, including:
  • 4WRA (Sizes 6 and 10, component series 2X)
  • WRZ (Component series 7X)
  • 3DREP 6 (Component series 2X)
• Industrial Machinery: Found in plastic injection molding machines, die casting systems, metal press lines, and heavy-duty hydraulic power units (HPUs).
• Control Systems: Frequently installed inside 19-inch racks or standalone card holders (like the Rexroth VT 3002-2X-48F open holder or VT 12302 enclosed housing) to bridge the gap between programmable logic controllers (PLCs) and hydraulic actuators.

5. Critical Precautions & Operational Notes

• De-energize Before Servicing: Always disconnect the power supply prior to pulling out, plugging in, or altering jumper configurations on the card. Hot-swapping can damage the sensitive electronics.
• Jumper Configuration: Because this card functions as a multi-model replacement, you must configure internal jumpers (J1 through J9) to match your specific valve configuration (e.g., setting the correct PWM frequency and max current limits) before commissioning. Leaving the card on default settings may cause poor valve response or solenoid overheating.
• Shielding & Cable Routing: Command value signal lines must be shielded. Run the signal cables completely isolated from high-power electrical cables (such as motor drives) to avoid electromagnetic interference (EMI).
• Distance to Radio Sources: Maintain a minimum distance of at least 1 meter from radio communication equipment or high-frequency transmitters when the card is operating.
• Measurement Safety: Use high-impedance digital voltmeters (R_i > 100 k\Omega) when taking readings from the front-panel test sockets to prevent artificial signal drops.

Shipping Port: Xiamen, China

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