VT-SR7-1X/1/A4VS.250HS Bosch Rexroth Indramat
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MPN: R900029274
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The Bosch Rexroth Indramat VT-SR7-1X/1/A4VS.250HS is part of the VT-SWMA Modules series. It operates with a nominal supply voltage of ±24 VDC and has a command input limit of ±10 V. The module features a 32-pin male DIN 41 612 Form D connection and a regulated output voltage of ±15 V within 2%.
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Product Description:
The VT-SR7-1X/1/A4VS.250HS is an electronic servo amplifier card built by Bosch Rexroth Indramat for the VT-SWMA Modules series. It mounts in a sub-rack and conditions analog command signals so that proportional or servo-hydraulic valves receive the correct coil current. By translating differential inputs into a controlled, dither-superimposed output, the module supports precise pressure or flow regulation on presses, molding machines, and similar automated stations. Its card format also suits control cabinets where several hydraulic channels are grouped in a shared rack.
Its differential input stage accepts a maximum command swing of ±10 V; anything beyond this range is clipped to protect downstream circuits. A high input impedance of 50 kΩ minimizes loading on PLC or motion card outputs and helps maintain accurate reference tracking. Field wiring terminates on a 32-pin male DIN 41 612 Form D connector, enabling quick exchange or service. Internally, the board injects a dither of 3 mA at 340 Hz. This periodic perturbation lowers static friction in the valve spool and improves response linearity. Normal operation is powered from a symmetrical supply centered on ±24 VDC, and the onboard regulator also furnishes ±15 V within ±2% for auxiliary sensors.
The supply rails can tolerate drops to ±22 VDC or surges up to ±28 VDC without affecting calibration, an envelope that accommodates common industrial power fluctuations. Overall current drawn from the backplane peaks at 150 mA, while the dedicated output stage delivers a regulated 150 mA so a feedback-controlled solenoid receives steady drive. When an external limit circuit is engaged, the valve current is capped at ±60 mA, allowing delicate actuators to be protected from overheating. This operating range helps the card remain stable in hydraulic control racks where supply voltage can vary during machine cycles.
Frequently Asked Questions about VT-SR7-1X/1/A4VS.250HS:
Q: What is the command input voltage range for the VT-SR7-1X/1/A4VS.250HS module?
A: The VT-SR7-1X/1/A4VS.250HS accepts a command input limit of ±10 V.
Q: What is the command input resistance of the VT-SR7-1X/1/A4VS.250HS?
A: This model has a command input resistance of 50 kΩ.
Q: What type of connection interface does the VT-SR7-1X/1/A4VS.250HS utilize?
A: A 32-pin male connector following DIN 41 612 Form D is used for connections.
Q: What regulated output voltage does the VT-SR7-1X/1/A4VS.250HS provide?
A: The regulated output voltage is ±15 V with a ±2% tolerance.
Q: What is the valve current limit of the VT-SR7-1X/1/A4VS.250HS module?
A: The maximum valve current limit for this module is ±60 mA.
