Rexroth Bosch Group VT 2000-52 (5X series) Electrical Proportional Amplifier

Product basic information

Product model: VT 2000 (5X series) electrical amplifier

Applicable objects: Direct acting and pilot operated proportional pressure control valves without electrical position feedback

Document version: RE 29904/09.04

Supporting components

Card holder: VT 3002-2X/32

Power supply: VT-NE30-1X (115/230VAC → 24VDC, 70VA)

To replace the 4X series, an additional blind plate needs to be purchased: R900021004

Core Function Description

Dual instruction value input

Instruction 1: 0~+9V, reference potential M0

Instruction 2: Differential input 0~+10V, compatible with external controls such as PLC

Slope generator

The boost/buck time is independently adjustable

Range: 30ms~approximately 1s/5s (jumper S1 switching)

Output stage

Clock based current output, frequency 100/200Hz (switched by jumper S2)

Improving valve control characteristics with flutter signals

safety protection

Reverse polarity protection of power supply

Electromagnetic valve cable short circuit protection

Overload overheating automatic shutdown output stage

Key Technical Parameters

Parameter item value/specification

Working voltage 24 VDC (22~35V)

Power consumption<25 VA

Fuse 2.5 A slow melting

Command input 1 0~+9 V (M0 as reference)

Instruction input 2 (differential) 0~+10 V, input impedance 100 k Ω

Maximum output current 800 mA

Bias current 0~300 mA (Zw adjustable)

Slope time 30 ms~1 s/5 s

Clock frequency 100 Hz/200 Hz

Measurement port w 0~+6 V (corresponding to 100% instruction)

Measurement port I 0~800 mV (corresponding to 0~800 mA)

32 pin male interface, DIN 41612 D-type

Size Euro card 100 × 160 mm

Working temperature 0~50 ℃

Weight 0.1 kg

Adjustment and jumper settings

Panel adjustment

Gw: Maximum instruction value attenuation (voltage limit)

Step up ramp and step down ramp: speed regulation separately

In board adjustment

Zw (R130): bias current 0~300mA

Jumper settings

S1: Slope time of 1s/5s

S2: Clock frequency 100Hz/200Hz

Troubleshooting (8 steps)

Check the 24VDC power supply (24ac-18ac)

Check the 2.5A fuse on the board

Confirm that ± 9V inside the board is normal

Internal command potentiometer needs to be short circuited 10ac-12ac

The wiring of the external potentiometer is correct

Differential input potential and wiring are normal

The resistance of the solenoid valve coil is 20-30 Ω (22ac-20ac)

The Gw potentiometer cannot be placed in the left limit zero position

Installation and maintenance specifications

Power off installation, measuring instrument impedance>100k Ω

M0 and 0V are not grounded together (M0 is 9V higher than 0V)

Command line shielded at both ends, grounded at one end

It is recommended to shield the solenoid valve wire, and use a 1.5mm ² cable for a maximum length of 50m

Stay at least 1m away from strong electricity and RF sources

Key questions and answers

Question: What are the functions of the core regulating components Gw and Zw in the VT 2000 amplifier?

Answer: Gw is the maximum instruction value attenuation potentiometer on the panel, used to limit the output current and maximum pressure; **Zw (R130) * * is an onboard bias current regulator that can set an initial current of 0-300mA to improve the starting characteristics of proportional valves.

Question: What are the two types of instruction inputs for this amplifier and what scenarios are they suitable for?

Answer: * * Instruction 1 (0~+9V) * * is suitable for direct control with internal/external potentiometers; **Instruction 2 (differential 0~+10V) * * is suitable for external controllers such as PLCs, with stronger anti-interference ability and adaptability to different reference potential systems.

Question: What should be noted when replacing the old 4X series with VT 2000 amplifier?

Answer: The 5X series is electrically and pin compatible with the 4X series, but a separate order for 4TE/3HE blind plates (material number R900021004) is required. The factory default slope is 5s, and the clock 200Hz can be directly replaced.