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BOSCH REXROTH
0811405152

Bosch Rexroth
VT-VARAP1-527-20/V0
p/Q closed-loop control amplifier

BOSCH REXROTH

MATERIAL: 0811405152

SUMMARY: Bosch Rexroth
VT-VARAP1-527-20/V0
p/Q closed-loop control amplifier

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Pressure sensor connection versions

technical illustration-0811405152-Bosch Rexroth
VT-VARAP1-527-20/V0
p/Q closed-loop control amplifier

01	02	03	04	05	06	07		08		09		10		11
VT-	V	A	R	A	P	1	–		–	2X	/	V0	/

01		VT-
02		V
Hydraulic component (control)
03	Axis control	A
Valve type
04	High-response valve	R
Control
05	Analog	A
Function
06	p/Q control	P
Output stages
07	1 output stage	1
Serial number for types
08	2.7 A solenoid	527
08	3.7 A solenoid	537
09	Component series 20 ... 29 (20 ... 29: unchanged technical data and pin assignment)	2X
Customer version
10	Catalog version	V0
Option
11	High-response valve size 6/10, direct operated	no code
	p/Q valve size 10, direct operated	5/3V
	High-response valve, pilot-operated	2STV
	High-response valve, pilot-operated, control line A → X	3/2V

General

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!

a
b	Problem: P share too small Solution: → Rotate KP against 13 (fine adjustment) → P gain >
	DIL 14	ON
	DIL 15	OFF
	DIL 16	ON
c	Problem: P share too large Solution: → Rotate KP against 0 (fine adjustment) ➝ Use DIL 14–16 to reduce the P gain according to the table
d	Problem: P share correct, control deviation too large Solution: ➝ Increase the I gain share → DIL 11 ON = I share = 0 DIL 12 ON = I share connected → Rotate KI against 13
e	Problem: Time constant of the I share too low Solution: ➝ Rotate KI against 13 until control deviation and vibration are perfect → If KI = 13 is not sufficient, the P share must also be reduced
f	Problem: D share too low Solution: ➝ Rotate KD against 13 → D share >
	DIL 8	ON
	DIL 9	OFF
	DIL 10	OFF