VT 3006 S35 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VT 3006 S35 is an analog amplifier from the VT 3000 Analog Amplifiers series with an operating voltage of 24 VDC and a power consumption of less than 50 VA. It features a maximum solenoid current of 800 mA and a differential input of ±10 V with 100 kΩ input resistance. The unit also includes a biasing current of 20 mA ±25% and is protected by a 2.5 A rated fuse.
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Product Description:
The VT 3006 S35 is an analog amplifier card produced by Bosch Rexroth Indramat for the VT 3000 Analog Amplifiers series. It conditions low-level command signals and delivers controlled current to proportional solenoids in hydraulic valves used throughout industrial automation. By translating a ±10 V differential reference into a pulse-width-modulated output, the card allows a PLC or motion controller to set the valve position without direct high-power wiring. This arrangement separates the sensitive command circuit from the higher-current solenoid circuit while preserving proportional valve control.
The amplifier accepts an operating supply of 24 VDC +60%/-5%, allowing the cabinet supply to vary while the card maintains regulation. Nominal current consumption remains less than 1 A, and total apparent power remains below 50 VA, which limits the load placed on the control power source. The card supports five logic inputs: channels 1 through 4 tolerate ±9 V, while channel 5 is rated for ±6 V. These channels operate with the ±10 V differential input window used by the main control loop. Internal electronics generate a regulated ±9 V ±1% rail for signal processing. A time-lag fuse rated at 2.5 A T protects the supply path from excessive current during electrical faults.
On the output side, the card can supply up to 800 mA of solenoid current and is matched to a solenoid coil resistance of 19.5 Ω. A relay coil resistance of 2,150 Ω supports status functions within the connected control circuit. Command information passes through a switching stage that operates at 170 Hz ±10%, providing smooth valve response without excessive switching losses. Precise biasing is established by a reference current of 20 mA ±25%, supporting repeatable null adjustment as temperature changes. The differential input has a resistance of 100 kΩ, which minimizes loading on upstream signal converters. Its high-impedance network also helps reduce sensor offset, while the differential signal structure rejects common-mode noise collected along extended cable runs.
