VT-SR7-1X/0/A4VS.250HS Bosch Rexroth Indramat
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MPN: R900035593
The Bosch Rexroth Indramat VT-SR7-1X/0/A4VS.250HS is part of the VT-SWMA Modules series and features operating and auxiliary voltages of ±24 VDC and ±15 VDC. It offers analog and command inputs of ±10 V, a maximum valve current of ±60 mA, and a dither frequency of 340 Hz. The module connects via a 32-pin DIN 41612 Form D connector and measures 100 x 160 mm.
Internal Product Review
The VT-SR7-1X/0/A4VS.250HS is a versatile analog control module from Bosch Rexroth Indramat's VT-SWMA series, featuring ±10 V actual position and command inputs. With a 32-pin DIN 41612 Form D connection and ±24 VDC operating voltage, installation and integration are straightforward. This module stands out for its precise control capabilities and reliable performance in demanding automation environments.
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Product Description:
The VT-SR7-1X/0/A4VS.250HS is an electronic valve-control card developed by Bosch Rexroth Indramat for the VT-SWMA modules series. It conditions analog reference signals and issues regulated coil current so that proportional or servo-hydraulic actuators track a commanded position or pressure setpoint inside automated machinery. The board follows the 100 × 160 mm Eurocard footprint, allowing direct insertion into standard rack slots used on presses, molding equipment, and test stands. Because it mounts in a standard card rack, it can be used where several hydraulic axes or pressure loops are grouped in one control cabinet.
The card is energized from a bipolar logic supply of ±24 VDC, while the command channel and feedback loop share a single-ended ±10 V range that matches common PLC analog outputs. A high input impedance of 50 kΩ minimizes loading on those controllers. Field wiring terminates on a 32-pin DIN 41612 Form D header, allowing quick removal without individual screw terminals. Internal modulation employs a dither current of 3 mA at 340 Hz; this oscillation reduces hydraulic stiction and steadies small-signal response. When powered, the card also provides an auxiliary ±15 V rail for external transducers and monitoring circuits, avoiding the need for a separate power supply.
The output stage can deliver up to ±60 mA to the valve coil, enabling accurate control of medium-sized proportional spools. A relay on the board engages at a call-up level of +24 V, operates through a 700 Ω coil, and releases within 4 ms, allowing fast safety shutdowns commanded by the machine controller. Overall card depth is 160 mm, and the exposed front panel rises 128.4 mm above the rack rail. The front-facing arrangement keeps status access and electrical connections concentrated at the rack face, which suits compact panel layouts.
