HESS Hydraulic Equipment Systems and Solutions

Гидравлическое Оборудование Системы и Решения

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p/Q closed loop amplifier VT-VARAP1-2X

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p/Q closed loop amplifier VT-VARAP1-2X

  • Component series 2X
  • Suitable for controlling direct and pilot-operated high-response valves
  • Amplifier with additional electronics (daughter card)
  • Analog amplifiers in Europe format for installation in 19" racks
  • Valve position control with PID behavior
  • Pressure control with external pressure load cell
  • Controlled output stage
  • Enable input
  • Short-circuit-proof outputs
  • Adjustment options: Valve zero point
  • Cable break detection for actual value cable and pressure sensor
  • Fast energization and fast deletion for short actuating times
  • External controller shut-off
  • Suitable for pressure sensors (1...6 V, 0...10 V, 4...20 mA), see data sheet 30271

Type / version

    VT-VARAP1-527 VT-VARAP1-537

Supply voltage
UB at z2 ‒ b2

    nominal 24 V=
battery voltage 21...40 V,
rectified alternating voltage Ueff = 21...28 V
(single-phase, full-wave rectifier)

Smoothing capacitor, separately
at z2 – b2

    Recommendation: Capacitor module VT 11110 (see data sheet 30750)
(only necessary if the ripple of UB >10 %)

Valve solenoid, max.

 

A

2.7 3.7

Current consumption, max. 1)

 

A

1.7 2.7

Power consumption (typical)

 

W

37 55

Input signal (command value)

    b20: 0...±10 V – differential amplifier
z20: 0...±10 V – differential amplifier
(Ri= 100 kΩ)

Input signal (command value p)

    z12: 0...+10 V – differential amplifier
z10: 0 V – differential amplifier

Actual value from the pressure sensor

    z14: 4...20 mA – current input
b16: 0...+10 V/1...+6 V – voltage input
b18: 0 V – reference

Pressure controller OFF

    b10: 6...40 V=

External enquiry pressure controller active

    z24: 24 V/0.1 A max.

Limit frequency

    for applications ≤ 30 Hz

Signal source

    Potentiometer 10 kΩ
Supply with ±10 V from b32, z32 (10 mA) or external signal source

Enable output stage

    at z16, U= 8.5...40 V, Ri = 100 kΩ LED (green) on front plate lights up

Sensor supply

    z6: +15 V/35 mA, Ri ~ 25 Ω

Position transducer

Supply

    b30: -15 V (25 mA)
z30: +15 V (35 mA)

Pilot control valve

Actual value signal

    b22: 0...±10 V, RL = 10 kΩ/Ref. b24

Main stage

Actual value reference

    b26: 0...±10 V, RL = 10 kΩ/Ref. b28

Solenoid output
b6 ‒ b8

    Clocked current controller

Imax

A

2.7 3.7

Cable lengths between amplifier and valve

Solenoid cable

 

m

20
 

m

20 … 60

Number of wires / line cross-section

Position transducer

    4 x 0.5 mm2 (shielded)

Pressure sensor

    4 x 0.5 mm2 (shielded)

Special features

    Cable break protection for actual value cable
Position control with PID behavior
Pulsed output stage
Fast energization and fast deletion for short actuating times
Short-circuit-proof outputs
External controller shut-off

Adjustment

    Zero point via trimming potentiometer ±5 %
Command value attenuator Q
Pressure controller KP, KI and KD
Sensitivity pressure load cell
Zero point pressure load cell

LED displays

green

    Enable

yellow

    Cable break position transducer

red

    Supply voltage (UB too low)

yellow

    Pressure controller OFF

yellow

    Pressure controller working

both yellow LEDs are flashing

    Cable break pressure sensor

Error message

Cable break actual value
UB too low
±15 V stabilization

    z22: Open collector output to +UB
max. 100 mA; no error: +UB

Plug-in connection

    Plug to DIN 41612-F32

Operating temperature

 

°C

 0+70

Storage temperature range

 

°C

-20 … +70

Weight

m

kg

0.49

1) Current consumption may increase with min. UB and extreme cable lengths to the control solenoid

 

Power zero b2 and control zero b12 or b14 or z28 must be separately led to the central ground (neutral point).

For applications outside these parameters, please consult us!

Pressure sensor connection versions

 

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