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1、VT 5005 . VT 50081/8RE 30 095/01.99 2002 by Bosch Rexroth AG, Industrial Hydraulics, D-97813 Lohr am Main All rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using electronic systems, in any form or by any means, without the prior written au
2、thorisation of Bosch Rexroth AG. In the event of contravention of the above provisions, the contravening party is obliged to pay compensation. This document was prepared with the greatest of care, and all statements have been examined for correctness. This document is subject to alterations for reas
3、on of the continuing further developments of products. No liability can be accepted for any incorrect or incomplete statements. Table of contents ContentsPage Features1 Ordering code1 Functional description2 Block circuit diagram / pin assignment VT 5005 and VT 5006 3 Block circuit diagram / pin ass
4、ignment VT 5007 and VT 5008 4 Technical data5 Indicator / adjustment elements6 Unit dimensions7 Engineering notes / maintenance instructions / supplementary information7 RE 30 095/05.02 Replaces: 01.99 Electrical amplifiers Types VT 5005 to VT 5008 Series 1X Type VT 5005-1X (from series 17) H/A/D 55
5、81/96 Features Note: The ramp time of the amplifiers is factory-set to 5 s (for setting a ramp time of 1 s, see page 6). Suitable for controlling direct operated proportional directional valves with electrical position feedback (type 4WRE, series 1X) Differential input Enable input with LED lamp Rea
6、diness for operation is signalled by LED lamp Step function generator and ramp generator Five ramp times can be set with the help of potentiometers (VT 5007 and VT 5008 only) Four command values that can be adjusted by means of potentiometers, call-ups are signalled by LEDs Controller for valve spoo
7、l position Two clocked current output stages Oscillator and demodulator for inductive position measurement with cable break detection Polarity reversal protection for voltage supply Card holder: Type VT 3002-2X/32, see RE 29 928 Single card holder without power supply unit Power supply unit: Type VT
8、-NE30-1X, see RE 29 929 Compact power supply unit 115/230 VAC 24 VDC, 70 VA Ordering code Further details in clear text 1X =Series 10 to 19 (10 to 19: unchanged technical data and pin assignment) VT 500_ 1X/ * Amplifier with one ramp time: for valve type 4WRE 6 .-1X= 5 for valve type 4WRE 10 .-1X= 6
9、 Amplifier with five ramp times: for valve type 4WRE 6 .-1X= 7 for valve type 4WRE 10 .-1X= 8 RE 30 095/01.992/8VT 5005 . VT 5008 Functional description External time potentiometer and ramp “off“ Note: When an external time potentiometer is used, the internal ramp time potentiometer must be set to m
10、aximum. The maximum ramp time shortens, because the resistance value of the external po- tentiometer is connected in parallel to that of the internal po- tentiometer (approx. 500 k)! The ramp time is set to its minimum value (approx. 30 ms) by switch- ing relay K5 or by means of an external bridge.
11、The output signal of ramp generator 4 is fed in parallel to summator 6 and step function generator 5. At command value voltages 100 mV step function generator 5 creates a polarity-dependent step-change signal that is added to the output signal of the ramp generator. This step function causes a fast
12、movement through the overlap range of the valve spool. At greater command value voltages the step function generator outputs a constant output signal. The output signal of summator 6 is the position command value and is fed to PID-controller 7, measuring socket “w“ on the front panel of the card and
13、 connection 4a (command value after ramp/ external limitation potential). A voltage of 6 V at command value measuring socket “w“ corresponds to a command value of + 100 %. The PID-controller is specifically optimised for valve type 4WRE (se- ries 1X). The current output stages are controlled in rela
14、tion to the difference between the position command value and the actual po- sition value. A positive command value signal at the amplifier input controls the output stage for solenoid “a“, a negative command value signal the output stage for solenoid “b“. Inductive position transducer 13 senses the
15、 position of the valve spool. The AC voltage signal of the position transducer is converted by oscillator/demodulator 11 and fed to the PID-controller as ac- tual position value. The zero point of the position transducer (actual value zero point) can be adjusted by means of potentiometer “Zx“ (on th
16、e printed circuit board). The gain of the actual position value is factory-cali- brated and must not be changed ( 6 V = max. valve spool stroke). A signal of 8.5 V at the enable input enables the output stages (signalled by yellow LED “H11“ on the front panel). By setting jumper J7 the output stages
17、 can be continuously enabled independently of the state of the enable input. In this case, the enable input is ineffec- tive. LED “H12“ (ready for operation) lights during trouble-free opera- tion; positively when: the enable signal is applied, the internal 9 V voltage supply is correct (amplitude a
18、nd symmetry), the solenoid cables have no short-circuit and there is no cable break of the position transducer cables. In the case of a fault, the two output stages are immediately de- energised and the signal “ready for operation” is reset. After correc- tion of the fault, the card is immediately o
19、perable; LED “H12“ lights up again. 1) = Reference potential for command values 1 to 4 is M0 (mea- surement zero). = Cross-reference to block circuit diagrams on pages 3 and 4 Ramp “adjustable“ Ramp “on/off“ Controlling solenoid “b“ Controlling solenoid “a“ Controlling solenoids “a“+“b“ Inputs Input
20、s Inputs Command value inputs 1 to 4 can be used to call up command val- ues 1 by controlling the related relays (K1 to K4). The command value voltage is applied either directly via the regulated 9 V volt- ages of the internal power supply unit 12 or via an external com- mand value potentiometer. Th
21、e following is valid for these inputs: 9 V = 100 % 1). If these four command value inputs are con- nected directly to the regulated 9 V voltages, then four different command values can be set on potentiometers “w1“ to “w4“. When external command value potentiometers are used on these inputs, the int
22、ernal potentiometers act as attenuators or limiters, unless they are set to their maximum values. External command value potentiometers Which command value is being called up is indicated by LEDs “H1“ to “H4“. If more than one command value is called up at a time, the input with the highest number h
23、as priority. Example: If command value 1 and command value 3 are activated at the same time, com- mand value 3 is effective. A further output of the card provides the supply voltage for the com- mand value call-ups and can be changed over from + 9 V to 9 V using relay K6 1). With amplifier variants
24、with 5 ramp times (VT 5007 and VT 5008), an adjustable ramp time (“t1“ to “t4“) is assigned to each of the four call-up command values. If no command value is called up, time “t5” is effective for these amplifiers. With amplifier variants with one ramp time (VT 5005 and VT 5006) time “t” is effectiv
25、e for all com- mand values. All the relays on the card are switched with 24 VDC (smoothed). Command value input 5 is a differential input (0 to 10 V). If the command value is provided by external electronics with a different reference potential, this input must be used. When the command value voltag
26、e is applied or withdrawn, care must be taken to ensure that both signal cables are connected to or disconnected from the input. Before being passed on, all command values are summated with the correct amount and sign 3. The downstream ramp generator 4 generates a ramp-shaped out- put signal from a
27、step-change-like input signal. The time constant of the output signal can be adjusted by means of potentiometers “t“ or “t1“ to “t5“. The given ramp time refers to a command value step- change of 100 % and can be approx. 1 s or 5 s depending on the jumper setting (J5, J6). If a command value step-ch
28、ange of less than 100 % is applied to the input of the ramp generator, the ramp time shortens accordingly. 24a 9 V 26cM0 28c 5 K 14c (14a, 20a, 20c) 26a+ 9 V 26cM0 28c 5 K 14c (14a, 20a, 20c) 26a+ 9 V 24a 9 V 28c 5 K 14c (14a, 20a, 20c) 8a 10a 28c 500 K 8a 10a VT 5005 . VT 50083/8RE 30 095/01.99 8a
29、10a t u + K6 H1 H2 K3 K2 K1 H4 H3 K4 K5 K6 24a 26a 30a 16c 16a 12a 12c 18c 18a 2c 32c 2a 32a 22a + UB 28a J7 2,5 A T 26c 22c +9 V M0 9 V 2200 F 24c = 12 w 8 6 5 1 i u i PI PI 1 2 = Gx Zx 11 13 30c 10c 8c 28c H10 x PID 10 4a 15 7 14 14 0 V K5 14c 14a 20a 20c 6a K1 K2 K3 K4 w1 (R1) J5, J6 1 43 6c u u
30、2 4c 89 9 F w2 (R2) F w3 (R3) F w4 (R4) F F 0 V F F F F F F F F A positive command value at the input (corresponds to negative command value at measuring socket “w“) causes an increase in current in solenid “a“ and a flow from P to B and from A to T. A negative command value at the input (correspond
31、s to positive command value at measuring socket “w“) causes an increase in current in solenoid “b“ and a flow from P to A and from B to T. Block circuit diagram / pin assignment: VT 5005 and VT 5006 (from series 17) Operating voltage Reference potential/GND Comm. value 5 10 V Differential input Meas
32、urement zero (M0) is raised by 9 V as against 0V operating voltage! Call-up command value 1 Call-up command value 2 Call-up command value 3 Call-up command value 4 Call-up “ramp off“ Call-up “change over auxiliary voltage “ Relay call-up voltage (+ 24 V) Auxiliary voltage 9 V Solenoid “a“ Solenoid “
33、b“ Command value 4 9 V Command value 3 9 V Command value 2 9 V Command value 1 9 V F = on front panel External ramp Enable input Internal “enable” H1 to H4 = LED lamps for com- mand value call-ups K1 to K6= Call-up relays R1 to R4=Command value potentiometers t= Ramp time 1Command values 2Differenti
34、al amplifier 3; 6Summator 4Ramp generator 5Step function 7Spool position controller 8Current regulator 9Output stage 10Monitor 11Oscillator/demodulator 12Power supply unit 13Position transducer 14Threshold value detector 15Proportional valve Ready for operation Enable Measuring socket “w“: 6 V = + 1
35、00 % Measuring socket “x“:+ 6 V = + 100 % Actual position value 0 to 6 V Command value after ramp 0 to 6 V RE 30 095/01.994/8VT 5005 . VT 5008 A positive command value at the input (corresponds to negative command value at measuring socket “w“) causes an increase in current in solenid “a“ and a flow
36、 from P to B and from A to T. A negative command value at the input (corresponds to positive command value at measuring socket “w“) causes an increase in current in solenoid “b“ and a flow from P ro A and from B to T. 8a 10a K1.2 K2.2 K3.2 K4.2 t3t2t1t5t4 u + K6 H1 H2 K3 K2 K1 H4 H3 K4 K5 K6 24a 26a
37、 30a 16c 16a 12a 12c 18c 18a 2c 32c 2a 32a 22a + UB 28a J7 2,5 A T 26c 22c +9 V M0 9 V 2200 F 24c = 12 w 8 6 5 1 i u i PI PI 1 2 = Gx Zx 11 13 30c 10c 8c 28c H10 x PID 10 4a 15 7 14 14 0 V K5 14c 14a 20a 20c 6a K1 K2 K3 K4 w1 (R1) J5, J6 1 43 6c u u 2 4c 89 9 F w2 (R2) F w3 (R3) F w4 (R4) F FFFFF 0
38、V F F F F F F F F Block circuit diagram / pin assignment: VT 5007 and VT 5008 (from series 17) Operating voltage Reference potential/GND Comm. value 5 10 V Differential input Measurement zero (M0) is raised by 9 V as against 0V operating voltage! Call-up command value 1 Call-up command value 2 Call-
39、up command value 3 Call-up command value 4 Call-up “ramp off“ Call-up “change over auxiliary voltage “ Relay call-up voltage (+ 24 V) Auxiliary voltage 9 V Solenoid “a“ Solenoid “b“ Command value 4 9 V Command value 3 9 V Command value 2 9 V Command value 1 9 V F = on front panel External ramp Enabl
40、e input Internal “enable” H1 to H4 = LED- lamp for com- mand value call-ups K1 to K6= Call-up relay R1 to R4=Command value potentiometers t1 to t5= Ramp times 1Command values 2Differential amplifier 3; 6Summators 4Ramp generator 5Step function 7Spool position controller 8Current regulator 9Output st
41、age 10Monitor 11Oscillator/demodulator 12Power supply unit 13Position transducer 14Threshold value detector 15Proportional valve Ready for operation Enable Measuring socket “w“: 6 V = + 100 % Measuring socket “x“:+ 6 V = + 100 % RE 30 095/05.02 Actual position value 0 to 6 V Command value after ramp
42、 0 to 6 V VT 5005 . VT 50085/8RE 30 095/01.99 Technical data (for applications outside these parameters, please consult us!) Note: For details regarding environment simulation tests in the field of EMC (electro-magnetic compatibility), climate and mechanical stress, see RE 30 095-U (declaration of e
43、nvironmental compatibil- ity). Operating voltageUO24 VDC + 40 % 5 % Operating range: Upper limit valueuO(t)max35 V Lower limit valueuO(t)min22 V Power consumptionPS 50 VA Current consumptionI 8.5 V not activeUE 100 k ! The measurement zero (M0) is raised by + 9 V as against the 0V operating voltage
44、and not isolated, i.e. 9 V regulated voltage = 0V operating voltage. Therefore, do not connect the measurement zero (M0) with the 0V operating voltage! Use relays with gold-plated contacts for switching command values (small voltages, small currents)! For switching card relays, use only contacts wit
45、h a load capability of approx. 40 V, 50 mA ! In the case of external controlling, the control voltage may have a maximum residual ripple content of 10 % ! Always shield command value cables; connect the shield to the 0V operating voltage on the card side and leave the other end open (risk of earth l
46、oops)! Recommendation: Also shield solenoid cables! For solenoid cables up to 50 m length, use cable type LiYCY 1.5 mm2. For greater lengths, please consult us! The distance to aerial lines, radio sources and radar equipment must be at least 1 m! Do not lay solenoid and signal cables near power cabl
47、es! Due to the charging current of the smoothing capacitor on the card, back-up fuses must be of the slow-blow type! Do not connect the earth sign on the inductive position transducer to ground! (Precondition for the compatibility with previous series!) Caution:When using the differential input, bot
48、h inputs must be switched on or off simultaneously! Note:Electrical signals brought out via control electronics (e.g. signal “ready for operation) must not be used for switching safety-relevant machine functions! (See also European standard Safety requirements for fluid power systems and components
49、hydraulics, EN 982) VT 5005VT 5007 VT 5006VT 5008 w H t x w w w w w w w w w x H H H H H H H t t t 1 2 3 4 1 2 3 4 8TE (40,3)8TE (40,3) 3HE (128,4) : M0 6 V:= 100 % : M0 6 V:= 100 % 100 89 7165 180 2 8 tt5 RE 30 095/01.998/8VT 5005 . VT 5008 Bosch Rexroth AG Industrial Hydraulics D-97813 Lohr am Main Zum Eisengieer 1 D-97816 Lohr am Main Telefon0 93 52 / 18-0 Telefax0 93 52 / 18-23 58 Telex 6 89 418-0 eMaildocumentationboschrexroth.de Internet www.boschrexroth.de The data specified above onl