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RE 29 882/02.98

Imin

Imax

5 V– 10 V

2,5 V0 V

0 V+ 10 V

~ 0,8 x Imax

~ 0,06 x Imax

RE29 882/02.98Replaces: 12.94

Electronic Amplifierfor the control

of up to four proportional solenoidsType MHVA 4 B, Series 1X

The electronic amplifier MHVA 4 B is suitable for the control ofup to four proportional solenoids.

Characteristics:– Four pulsed mostly independently functioning output

stages for proportional solenoids– Output stages can be switched off separately– Voltage supply for external command value potentiometers

(+ 5 V)– Four differential inputs ± 10 V– Four additional inputs (M0 ± 2,5 V)– Two switchable command value inputs– Optional: 8 digital inputs, 4 analogue inputs

1 frequency input, serial interface– Step function generator– Adjustable time ramps (via trimming potentiometer);

Separately adjustable for up and down ramp– External time ramp switch off– Potentiometer for adjustment of I10% and Imax per solenoid– Limited short circuit protection and overload protection– Polarity safeguard

Setting rangesolenoids A and C

Setting rangesolenoids B and D

Setting rangesolenoids A and C

Setting rangesolenoids B and D

12 V version

Output curves Technical data

Common control of solenoid A and C or B and D

H/A 4439/94

Type MHVA 4 B1X/…

Operating voltage:– 12 V version U

eff: 10,5 V to 16 V

– 24 V version Ueff

: 21,5 V to 32 V

Command supply voltage Uext: + 5,0 V (max. 10 mA)M0ext: + 2,5 V (max. 2,5 mA)

Valve type: FTDRE2K, DRE4K ordirect operated solenoid

Pulse frequency f : ca. 150 to 230 Hz(acc. to valve type)

Power consumptionAmplifier without solenoid:– 12 V version Pmax: ca. 1 W (Imax ca. 90 mA)– 24 V version Pmax: ca. 2 W (Imax ca. 90 mA)

Output current (dependent on valve type):– 12 V version Imax: 2,6 A (with DB)– 24 V version Imax: 1,8 A (with DB)

Command voltage range USoll: 0 to ± 10 V (M0 ± 2,5 V)

Max. constant pulse control Umax

: ± 3 V

Input resistance ofdifferential amplifier RE: ca. 10 kΩFuse IS: max. 8 A T

Type of connection: 55-pin AMP-plug

Contact material: CuZn

Plug-in cycles: max. 10

Perm. ambient temperature ϑ : – 25 to + 70 °CStorage temperature ϑ : – 30 to + 80 °CInsulation to DIN 40 050: IP 30

Weight m : ca. 0,55 kg

For application outside these parameters please consult us!

Separate control of solenoid A and C or B and D

Imin

Imax

0 V0 V

2,5 V0 V

2,5 V10 V5 V

10 V

~ 0,7 x Imax

~ 0,06 x Imax

Setting rangeof solenoids A to D

Solenoid A and C

Solenoid B and D

USoll

12 V24 V

Imin

Imax

5 V– 10 V

2,5 V0 V

0 V+ 10 V

~ 0,7 x Imax

~ 0,06 x Imax

ISolenoid

USoll

USoll

ISolenoid

ISolenoid

24 V version

RE 29 882/02.98

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UU I

U

373839

(µP) (µP)

I10%A11

ImaxA

(µP)

(µP)

A

28

1

5

max. 2,5 mAmax. 10 mA

M0ext = 2,5 VUext = 5 V

UU

IU

404142

(µP)

I10%B

12

ImaxB

(µP)

(µP)

B

29

2

6

23DI 5

22DI 4

21DI 3

20DI 2

19DI 1

24DI 625DI 726DI 8

18AI 4

17AI 3

16AI 2

15AI 1

UU

IU

474850

(µP)

I10%D

14

ImaxD

(µP)

(µP)D

+ 10 VGND

31

4

8

+ UB

0…5 V

RS232

5152

5354

TxDRxD

UU I

U

434446

(µP)

I10%C13

ImaxC

(µP)

(µP)

C+ UB

30

3

745

49

5

6

3

1

1

34

6

1

2

34

5

6

1

2

34

5

6

DC

DC

55

932333435

+ UB

0 V

7+ UM (5V)M0 (2,5V)– UM (0V)

4

1027

+ UB

+ UB

+ 10 VGND

+ 10 VGND

+ 10 VGND

+ UB

+ UB

(µP)

–+

2

(µP)

2

(µP)

36

A

A

+ UB

+ UB

X

Block Circuit Diagram / Terminal Connection

Micro-processor

µP(Option)

USollC

USollA

USollB

tabtauf

Ramp "off"

tdowntupRamp "off"

+ UB Output stage A

Solenoid A

Solenoid B

+ UB Output stage B

+ UB Output stage C

Solenoid C

+ UB Output stage D

Solenoid D

EMER.OFF

x…from powersuppply filter or viascreened cable anddirect via prefuseand EMER OFF

1 Differential amplifier2 Release output stage3 Ramp generator4 Step function generator5 Impulse generator6 Output stage7 Power supply

Ramp "off"

Ramp "off"

IComC

IComD

FrequencyOffset

Switchinput C

USollD

Switchinput D

tabtauf

tabtauf

Frequencyinput

Connectionsuggestion

(Voltage supplyof output stages)

RE 29 882/12.94

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RE 29 882/02.98

A

B

C

D

Function Description

The electronic amplifier is suitable for wall mounting. Its electricconnection is via a 55-pin AMP-plug.

The amplifier outputs for the proportional solenoids A, B, C or Dare activated by connecting approx. 10% command voltage atthe differential input. With this the output current jumps to its I10%value. The height of the I10%-jump as well as the increase of theoutput curve (solenoid current) may be set separately externallyvia potentiometer for the proportional outputs A, B, C and D. Asthe command voltage rises the solenoid current of the proportio-nal output in question increases linearly.

Additionally, the output stages C and D can be activated via aswitch input (connecting of + UB); the command value may beset via trimming potentiometers on the card.

LEDs indicate the current output to each proportional outputwhereby the brightness is approximately proportional to thesolenoid current in A, B, C or D.

The output stages may be released or switched off separately(+UB-solenoid) via the supply voltage.

A time ramp function is included in the amplifier which may beexternally changed by means of a trimming potentiometer. Thesetting range for the ramp times is approx. from 50 ms up toapprox. 4 s. The internal time ramp functions may be switchedoff via the inputs "ramp off".

Setting elements

Plu

g

I10%I100%t1↑t2↓I10%I100%t1↑t2↓I10%I100%t1↑t2↓IComI10%I100%t1↑t2↓ISoll

fOffset

Meaning of potentiometer

t1↑: Ramp time (current build-up)Rotation direction clockwise –> extension of ramp time

t2↓: Ramp time (current build-up)Rotation direction clockwise –> extension of ramp time

ICom : Limitation of command value (switch input)Rotation direction clockwise –> current increase

I100%: Current with 100%-command valueRotation direction clockwise –> current increase

I10%: Current step with 10%-command valueRotation direction clockwise –> current increase

Solenoid A

Solenoid B

Solenoid C

Solenoid D

RD 29 882/12.94

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Plug Connection

Project / Maintenance Instructions

Pin-No.: 28 + UB output stage A29 + UB output stage B30 + UB output stage C31 + UB output stage D32 GND33 GND34 GND35 GND36 GND37 Command value A (+ 10 V)38 Command value A (GND)39 UCom A (Potentiometer)40 Command value B (+ 10 V)41 Command value B (GND)42 UCom B (Potentiometer)43 Command value C (+ 10 V)44 Command value C (GND)45 Switch input C46 UCom C (Potentiometer)47 Command value D (+ 10 V)48 Command value D (GND)49 Switch input D50 UCom D (Potentiometer)51 TxD52 RxD53 f –54 f +55 + UB

Pin-No.: 1 Solenoid A +2 Solenoid B +3 Solenoid C +4 Solenoid D +5 Solenoid A –6 Solenoid B –7 Solenoid C –8 Solenoid D –9 GND

10 M0ext (Warning: wrong connection leads to destruction)11 Ramp off A12 Ramp off B13 Ramp off C14 Ramp off D15 Analogue input 1 (Option)16 Analogue input 2 (Option)17 Analogue input 3 (Option)18 Analogue input 4 (Option)19 Digital input 1 (Option)20 Digital input 2 (Option)21 Digital input 3 (Option)22 Digital input 4 (Option)23 Digital input 5 (Option)24 Digital input 6 (Option)25 Digital input 7 (Option)26 Digital input 8 (Option)27 Uext = 5 V (Command value potentiometer ≥ 5 kΩ)

serial input

Frequency inputOption

The GND-Pins 9 and 32 to 36 must be connected!

Notes for fault diagnosis

Overloading of an output:– The output stage concerned switches off automatically, the activation LED switches off.

Cable break in a proportional solenoid line:– The activation LED for the proportional output is permanently illuminated with full intensity.

– The amplifier may only be connected when switched off!– Ensure adequate distance to radio sources!– The amplifier is to be installed in such a way that the plug connection points downwards!– The cable connection must be stress-relieved and connected in such a way that no friction corrosion at the plug contacts

can occur due to vibration! The contacts must be protected from corrosion!– Do not lay lines near power lines!– When connecting several solenoids several ground lines (GND lines) must also be connected!– Do not use free wheel diodes in the solenoid lines! When separating the solenoid lines (e.g. with a relay) adequate

protective switches are necessary!– Caution with time ramp operation! When the electronics are switched off the time ramp is unable to continue!– In case of emergencies or fault the operating voltage of the amplifier and of the output stages must be switched off

externally!– If the solenoid output is overloaded (short circuit) the output concerned is disconnected. This undesirable state must be

rectified immediately! The reconnnection of the solenoid output can only be carried out with a command value of 0 V!– When carrying out electrical welding works the connection plug has to be separated from the amplifier!– When connecting several inputs simultaneously the sum of the corresponding input signals must not be higher than 100% of

the command value in order to avoid overloading!– When the unit is faulty malfunctions have to be taken into consideration (unvoluntary control or switching off of one or

several solenoids)!– All connection lines must be screened; the screen must be connected to ground at the amplfier!

The housing also has to be connected to ground!The connection as well as the installation of the amplifier is to be carried out HF-screened!

– We do not accept system responsibility for this component!

RE 29 882/12.94

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RE 29 882/02.98

Ordering code

top

Minimum spacerequirement for removalof plug

199

162

149

1

34

153

2740

179

Ø 7

13

17

27

2855

120

Unit dimensions (Dimensions in mm)

Installationposition:

Series 10 to 19 = 1X(10 to 19: unchanged technical data andterminal connection)

Operating voltage 12 VDC = G12Operating voltage 24 VDC = G24

We supply as standard version: MHVA4B1X/G24D

Further details in clear text

No code = Basic modelP = With processor 1)

Solenoid type/valve type:D = for direct operated proportional solenoidsE = for proportional valve type DRE 4 KF = for proportional valve type FTDRE 2 K

*MHVA 4 B 1X/

1) Please consult us for detail clarification!

The plug set Junior Timer MHVB is included in the delivery,but can also be ordered separately (order-no. 00571360).

It consists of: 1 plug10 contacts "Junior-Timer" (0,5 to 1,5 mm2)50 contacts "Micro-Timer" (0,5 to 1,0 mm2)

RE 29 882/02.98

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Mannesmann Rexroth AGD-97813 Lohr am MainJahnstraße 3-5 • D-97816 Lohr am MainTelefon 0 93 52 / 18-0 • Telefax 0 93 52 / 18-10 40Telex 6 89 418

Connection command value generator

For supply of command value poteniometer with external voltage (Uext ~ 5 V)

– Common control of solenoids A and B or C and D

Note: When cable break occurs full control ofa solenoid can be carried out!

pink

white

– Separate control of the solenoids A and B or C and D

Note: When cable break occurs full control ofa solenoid can be carried out!

Power supplymodule

VT 11 005or

VT 11 006

SignalgeneratorVT 10 468

Mannesmann Rexroth LimitedCromwell Road, St. Neots,Huntingdon, Cambs. PE19 2ESTel: (01480) 476041Fax: (01480) 219052

With external command value of ± 10 V

The specified data is for product description purposes only and may not be deemed to beguaranteed unless expressly confirmed in the contract. All rights reserved - subject to revision

27 (5 V)

39 (A); 46 (C)

42 (B); 50 (D)

9 (0 V)

10 (2,5 V)

R ≥ 5 kΩ

MHVA 4 B

R ≥ 5 kΩ

10 (2,5 V)

39 (A); 46 (C)

9 (0 V)

27 (5 V)

42 (B); 50 (D)

10 (2,5 V)

R ≥ 5 kΩ

MHVA 4 B

MHVA 4 B

37

38

40

41

43

44

47

48

A

B

C

D

± 10 V

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RE 29 882/02.98



Notes


RE 29 882/02.98

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Notes



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