Electric amplifiers. RE 30044/02.12 Replaces: Type VT-VRPA X/V0/RTS-2STV. Component series 2X 1/8

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1 Electric amplifiers RE 30044/02.12 Replaces: /8 Type VT-VRPA X/V0/RTS-2STV Component series 2X Table of contents Contents Page Features 1 Ordering code, accessories 2 Front plate 2 Block diagram with pin assignment 3 Block diagram ramp function 4 Technical data 5 Setting information 6 Unit dimensions 6 Project planning / maintenance instructions / additional information 7 Features Suitable for controlling directional control valves, pilot operated, with positive overlap Amplifier with additional electronics (daughter card) Analog amplifiers in Europe format for installation in 19" racks Controlled output stage Enable input Outputs short-circuit-proof Adjustment possibilities Zero point valve Cable break detection for actual value cable Position control with PID behavior Ramp function External voltage-controlled ramp setting via differential inputs Ramp function that can be switched off Notice: The photo shows an example configuration. The delivered product differs from the figure.

2 2/8 Bosch Rexroth AG Hydraulics VT-VRPA X/V0/RTS-2STV RE 30044/02.12 Ordering code, accessories Hydraulic component For valves with electrical feedback Valve type Directional control valve Control Analog VT- V R P A X V0 RTS-2STV = R = P = A Option RTS-2STV = Directional control valve, pilot operated RTS = Ramp function Customer version V0 = Catalog version 2X = Component series 20 to 29 (20 to 29: Unchanged technical data and pin assignment) Serial number for types 527 = Pilot control valve size 6 Preferred types Amplifier type Material number For directional control valves, pilot operated, with electrical position feedback and positive overlap VT-VRPA /V0/RTS-2STV WRL E/W...-3X... Suitable card holder: Open card holder VT X/32F (see data sheet 29928). Only for control cabinet installation! Front plate LED Ramp time ΔT = 0 (Ramp off) LED LED LED green red yellow Enable U B < U B min. 0,3 V comp. step. zero adj. Cable break ON RAMP off UB ext 0,1...3 ΔT int sec. S I 0, ΔT int gain zero 0 valve Q 0 Lvdt LED External ΔT (U T ext.) Accelerations (acc.) Adjustment range Decelerating (dec.) Gain U E Gain U E Zero (U E 0.3 V) Zero (U E 0.3 V) Zero window

3 RE 30044/02.12 VT-VRPA X/V0/RTS-2STV Hydraulics Bosch Rexroth AG 3/8 Block diagram with pin assignment Potentiometer supply Control zero z32 b32 b12 /10 ma /10 ma 15 V 15 V 10V Enable max 40 V= z16 On 15 V 8,5 V= Error Control zero 24 V z22 24 V= 0 V max 100 ma b14 U B max 40 V green Safety logic U B Lvdt. red yellow Signal inputs 0 V Q = 0 U EΙ U EΙΙ U EΙΙΙ z20 b20 z10 z12 gain Q = 0 zero gain U E DC U B z2 U B 24 V= Supply z4 b4 DC b2 z28 0 V Neutral point 0 V U B Logik max 0,1A D T = 0 (ramp off) U T ext. mode acc. U T D T ext. decc. U T Diff 0 (U T ) V max R i 0 0 z18 z14 z6 b16 b18 z24 U K Σ U E Differential amplifier U E U T ext. ramp U E U E U A T = 0 U T = ext. > 0,3 V U T int. D T1 D T2 ramp U E U E U E acc. Δ T int. decc. S Ι 0,1 3 sek 0,3 10 sek mode Block diagram ramp function, see page 4 b2 Power zero z28 Control zero Δ S Δ S Signal 15 V Ref 0 15 V Signal 15 V Ref 0 15 V b26 z30 b28 b30 b22 z30 b24 b30 b6 b Size U s U s

4 0... U E Ι 0... U E ΙΙ 0... U E ΙΙΙ V= Ramp off U T ext. Σ Δ T = 0 Δ T 3 sec. 10 sec. D A ext. int. U E gain 0,3 V comp. step. Q max U E Q 0 U A zero 0... Diff. 0 V U T ext U T U T acc. decc. acc. decc. zero adj. zero 24 V= Q = 0 (U A = 0) max 0.1 A 4/8 Bosch Rexroth AG Hydraulics VT-VRPA X/V0/RTS-2STV RE 30044/02.12 Block diagram ramp function Inputs Ramp Amplitude Differential amplifier Valve Control signal Adjustment: 1. Zero ±0.3 V 2. Max/gain ± U E 3. Ramp time ± Functions of the daughter ramp card Three command value inputs U E I Differential input (b20 = 0...±, z20 = 0 V) U E II Referred to control zero (z10) U E III } With summing effect (z12) Selection of internal and external ramp time setting via control input U Text. (z6), LED display on front plate Ramp increase time can be set by means of switch at front plate in ΔT sec. or ΔT sec. Connection and shut-off of the ramp function via control input Ramp off (z14), LED display of operating mode on the front plate Internal ramp time setting via potentiometer on the front plate Acceleration Deceleration External ramp time setting via voltage-controlled differential inputs U T Acceleration (b16) Deceleration (b18) Signal output "Ramp timeout in case of U E = 0 (z18; open collector output to U A ) LED display on front plate Setting: Sensitivity Q A /Q B Limitations in the range % Q max. Automatic quadrant recognition in the transmission of the valve from one quadrant to the other one thus only one setting potentiometer and/or one control voltage for the ramp time specification for acceleration and deceleration each.

5 RE 30044/02.12 VT-VRPA X/V0/RTS-2STV Hydraulics Bosch Rexroth AG 5/8 Technical data (For applications outside these parameters, please consult us!) Supply voltage U B at z2 b2 Smoothing capacitor, separately at z2 b2 Nominal 24 V =, Battery voltage V, Rectified alternating voltage U eff = V (one-phase, full-wave rectifier) Recommendation: Capacitor module VT (see data sheet 30750) (only necessary if the ripple of U B > 10 %) Valve solenoid, max. A/VA 2.7/40 (pilot control valve size 6) Current consumption, max. A 1.5 The current consumption may increase with min. U B and extreme cable length to the control solenoid Power consumption (typical) W 37 Input signal (command value) b20: 0...± z20: 0...± }Differential amplifier (R i = Ω ) Signal source Potentiometer 10 kω Supply with ± from b32, z32 (10 ma) or external signal source Enable output stage At z16, U = V, R i = Ω, LED (green) on front plate lights up Position transducer Supply b30: 15 V z30: 15 V Pilot control valve Actual value signal b22: 0...± Actual value reference b24 Main stage Actual value signal b26: 0...± Actual value reference b28 Solenoid output b6 b8 I max Clocked current controller 2.7 A Cable lengths between amplifier and valve Solenoid cable: 20 to 20 m 1.5 mm 2 20 to 60 m 2.5 mm 2 Position transducer: 4 x 0.5 mm 2 (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 Adjustment Zero point via trimming potentiometer ±5 % LED displays green: Enable yellow: Cable break actual value red: Undervoltage (U B too low) Error message Cable break actual value U B too low ±15 V stabilization z22: Open collector output to U B max. 100 ma; no error: U B Circuit board format mm (100 x 160 x approx. 35) / (W x L x H) Europe format with front plate 7 TE Plug-in connection Connector DIN F32 Ambient temperature C Storage temperature range C Weight m 0.44 kg Notice: Power zero b2 and control zero b12 or b14 or z28 must be separately led to the central ground (neutral point).

6 6/8 Bosch Rexroth AG Hydraulics VT-VRPA X/V0/RTS-2STV RE 30044/02.12 Setting information 1. Before setting the ramps "Acceleration/Deceleration", you must first of all align Q = 0 and Q max.. For that purpose, the ramp function can be switched on or off. 2. Q 0 is to be set in case of 0 V = U E. Q max. is to be set in case of ± = U E. 3. Zero point calibration: For the calibration, a small command value (U E = V) must be specified in order to ensure that the dead zone has been left. 4. Now, by means of command value changes 0 0U E and U E 0, you can set the desired ramp behavior Prerequisite: No command at z14. Unit dimensions (dimensions in mm) 24 V= Plug-in connector DIN F 32 Mains 160

7 RE 30044/02.12 VT-VRPA X/V0/RTS-2STV Hydraulics Bosch Rexroth AG 7/8 Project planning / maintenance instructions / additional information The amplifier card may only be unplugged and plugged when de-energized. The distance to aerial lines, radios and radar systems must be sufficient (> 1 m). Do not lay solenoid and signal lines near power cables. For signal lines and solenoid conductors, we recommend using shielded cables. The cable shield must be connected to the control cabinet extensively and as short as possible. The valve solenoid must not be connected to free-wheeling diodes or other protective circuits. The cable lengths and cross-sections specified on page 5 must be complied with.

8 8/8 Bosch Rexroth AG Hydraulics VT-VRPA X/V0/RTS-2STV RE 30044/02.12 Notes Bosch Rexroth AG Hydraulics Zum Eisengießer Lohr am Main, Germany Phone 49 (0) / 18-0 documentation@boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.