VT-SR7-1X/1/A4VS.250HS
VT-SWMA Modules
The VT-SR7-1X/1/A4VS.250HS belongs to the VT-SWMA Modules series manufactured by Bosch Rexroth Indramat. This plug-in card is installed in industrial automation panels to condition command signals and provide regulated power for proportional hydraulic valves. It allows a connected motion controller to adjust valve operation for repeatable control of hydraulic flow or pressure. The card combines analog signal processing, valve-current control, and auxiliary power regulation in a format designed for standardized control racks.
The module operates from a nominal system rail of ±24 VDC, with an acceptable operating range from ±22 VDC to ±28 VDC. This input range allows the electronics to tolerate normal supply variation and ripple on 24-volt utility buses. Internal current consumption does not exceed 150 mA, which helps limit the load placed on the auxiliary power supply. A referenced linear regulator delivers a balanced output of ±15 V ±2% for downstream sensors or local signal stages, helping analog circuits maintain stable offsets as operating conditions change. The regulator can supply 150 mA of continuous current to connected ancillary electronics. The board uses a 32-pin male DIN 41 612 Form D connector that mates directly with a standardized backplane and routes power, command, and discrete signals through a single interface.
Command processing accepts a bipolar input range of ±10 V from a PLC, motion controller, or other analog command source. The input has an impedance of 50 kΩ, which reduces loading on the source and helps preserve the commanded voltage. A fixed dither current of 3 mA at 340 Hz is superimposed on the actuator line to reduce spool friction and mechanical hysteresis without interfering with the primary control signal. Galvanically isolated return paths help minimize ground loops between the controller, card, and hydraulic valve circuitry. The valve driver limits coil excitation to ±60 mA, preventing excessive drive current when the input command reaches saturation. All discrete and analog functions pass through the DIN connector, keeping field wiring separate from the removable circuit board.
Technical Specifications
Command Input Limit
±10 V
Command Input Resistance
50 kΩ
Connection
32-pin male, DIN 41 612 Form D
Dither Current
3 mA
Dither Frequency
340 Hz
Max Power Consumption
150 mA
Max Supply Voltage
±28 VDC
Min Supply Voltage
±22 VDC
Nominal Supply Voltage
±24 VDC
Regulated Output Current
150 mA
Regulated Output Voltage
±15 V ±2%
Valve Current Limit
±60 mA
Frequently Asked Questions
What is the command input voltage range for the VT-SR7-1X/1/A4VS.250HS module?
The VT-SR7-1X/1/A4VS.250HS has a command input limit of ±10 V for signal control.
What are the supply voltage specifications for the VT-SR7-1X/1/A4VS.250HS?
This module supports a supply voltage range from ±22 VDC to ±28 VDC, with a nominal supply voltage of ±24 VDC.
What type of connection interface does the VT-SR7-1X/1/A4VS.250HS use?
It uses a 32-pin male connector compliant with DIN 41 612 Form D for electrical connection.
What is the valve current limit on the VT-SR7-1X/1/A4VS.250HS?
The valve current limit for this module is ±160 mA, providing controlled actuation for connected valves.
What are the dither current and frequency values for the VT-SR7-1X/1/A4VS.250HS?
The dither frequency is set at 340 Hz with a dither current of 3 mA, aiding in precise valve operation.
Internal Product Review
The VT-SR7-1X/1/A4VS.250HS is a Bosch Rexroth valve control module with a ±10 V command input and 50 kΩ input resistance. A nominal ±24 VDC supply and regulated ±15 V output support stable signal conditioning in hydraulic control circuits. The 32-pin DIN 41 612 Form D connection and ±60 mA valve current limit make the module a highly capable interface for precise valve actuation.
Shipping & Payment Options
Warranty
Repair
We offer a repair service for the VT-SR7-1X/1/A4VS.250HS.
Want to 
