Valve amplifier | for proportional directional cartridge valve type 2WFC VT-MRPA1-2X…WFC

Description

• Component series 2X
• Suitable to control the pilot-operated proportional directional cartridge valve type 2WFC
• One amplifier for all valves of type 2WFC-1X
• Easy selection of the valves to be controlled according to sizes
• Characteristic curves of the valves stored in the device

Features

• Valve optimization via push-buttons
• Command value input 0 ... ±10 V oder 4 ... 20 mA
• Reverse polarity protection of the operating voltage
• Ramp generator up and down is separately adjustable
• Zero point setting
• Command value adjustment
• Position control
• Clocked power output stage
• Output short-circuit-proof
• LED status displays
• Measuring sockets for position actual value, internal command value and parameters to be set

Product description

General

The amplifier module is intended for the assembly on top hat rails. The electrical connection is established via 4 tension spring plug-in connectors. The supply voltage is 24VDC.

Power supply unit (1)

The internal power supply unit has a making current limiter to prevent current peaks. Additionally, inverse-polarity protection is integrated.

Command value, command value summing device [3]

The “internal command value” comprises:

• the “external command value”, connected at the input of the differential amplifier (2)

• the zero point offset (4), “Z” adjustable in the standard - set-up

The “internal command value” can be measured at the “w” measuring socket and, in normal operation, at the “v” measuring socket.

Ramps

Ramps limit the incline of the command values. You can choose between a single ramp (5) (one time for all ramps, default value) and a 2-quadrant ramp (2Q) (6) (different times for the ramps up and down). The 2Q ramp times are set in the expert setup.

Command value attenuator “G” [7]

By means of the command value attenuator, the command value can be reduced.

Position controller (8)

The valve position is recorded, compared to the command value in the current controller and the difference is compensated.

Power output stage (9)

The power output stage creates the clocked solenoid current for the directional control valve. The solenoid current is limited to the maximum admissible current, depending on the set valve size. The output stage is short-circuit-proof. With an internal interference signal or in case enable is missing, the output stage will be switched off.

Enable input (10)

The enable input enables the output stage. The terminal has to be connected.

Logic (11)

Internal logic to enable output stage, internal command value and ready for operation output.

Ready for operation output (12)

Device notifies ready for operation if there is no cable break, no internal error and UB >= UB min.

See also “Symbols/circuit diagrams"

Type code

Available variants

Technical data

Electrical connection

Block diagram

Dimensions

Project planning information

Downloads

	Valve amplifier for proportional directional cartridge valve of type 2WFC Data Sheet | RE30220 | 2019-05-01 | English | PDF | 465k Product Groups: Analog, Modular design Type VT-MRPA1…WFC
	Valve amplifier for proportional directional valve type 2WFC, type VT-MRPA1-2X/.../WFC/... Manual | RE30220-B | 2019-05-08 | English | PDF | 2.7MB Product Groups: Analog, Modular design