VT 11004-11 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VT 11004-11 is a servo amplifier from the VT Servo Amplifiers series. It operates with a voltage range of 21 to 35 VDC and a clock frequency of 230 Hz. The unit has a maximum output current of 1000 mA, weighs 0.16 kg, and features 12 screw terminals with an IP20 protection class.
Internal Product Review
The VT 11004-11 is a Bosch Rexroth Indramat servo amplifier that stands out for dependable 24 VDC operation and IP20 protection. A ±10 V differential input and 1000 mA maximum output current support precise signal handling and strong actuator control. TH 35-7.5 mounting and 12 screw terminals make this unit an efficient choice for clean panel integration.
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Product Description:
The VT 11004-11 is a plug-in servo amplifier module produced by Bosch Rexroth Indramat for the VT Servo Amplifiers series. Installed in hydraulic drive controls, the unit modulates current to a proportional valve coil so that a PLC or analog reference can position a spool with repeatable accuracy. It is intended for DIN-rail cabinets where compact electronics adjust flow or pressure in presses, injection machines, or other industrial automation assemblies.
The standard control voltage for the amplifier is 24 VDC, with undervoltage and overvoltage thresholds at 21 V and 35 V to protect field wiring. The chopper stage switches at a clock frequency of 230 Hz ±15%, which keeps coil inductance within its linear region while limiting audible noise. A differential command interface accepts a symmetrical span of ±10 V; this signal is converted to an output that starts at the 330 mA I10% factory trim and rises linearly to 660 mA at I90%. For transient motions, the amplifier can source up to 1000 mA toward the valve, and under maximum electrical load, it draws no more than 25 VA from the cabinet supply. The 12 Ω coil resistance used in standard Rexroth valves matches these current levels to the thermal limits of the actuator.
The module mounts on a TH 35-7.5 rail and connects through 12 screw terminals, simplifying wiring and providing convenient access to the connections. Continuous operation is permitted at temperatures up to 50 °C, and convection cooling is normally sufficient because the open frame has an ingress protection rating of IP20. The overall enclosure measures only 40 × 79 × 85.5 mm, allowing several amplifiers to be arranged without crowding inside a control panel. Despite its steel carrier and heat sink, the assembly weighs only 0.16 kg, minimizing stress on lightweight rail sections and simplifying handling during installation.
