RE 29 739/10.95 Electric amplifier modules RE for the closed loop control of proportional directional valves 29 739/10.95 with electric positional feedback Replaces: 02.90 Types VT 11023, VT 11024, VT 11074 and VT 11075, Series 1X The amplifier modules VT 11 023, VT 11 024, VT 11 074 and VT 11 075 are used for the closed loop control of direct operated proportio- nal directional valves with electric positional feedback (type 4WRE: sizes 6 and 10). Characteristics: – Differential input – Adjustable ramp generator (max ramp time 5 s) – Step function generator (only with VT 11 023 and VT 11 024) – Two pulsed current output stages – Controller for the valve spool position – Polarity safeguard for the voltage supply Oscillator and demodulator for the inductive positioning signalling – – Controller release H/A 5310/95 – Cable break recognition VT 11 023 (from series 15) – LED-displays: "power" – internal supply voltage (green) "H1" – multifunction indicator (orange) Function description The following may be set via an external trimming potentiometer: The amplifier module is clipped onto carrier rails such as those – the ramp time up to ca. 5 s commonly installed in electronic control cabinets. The electric connection is via a terminal strip. – a command value reduction in the range from 0 % to 100 % – the zero point of the position transducer The amplifier module contains the electronic components for the control of two proportional solenoids. Depending on the command value polarity solenoid "a" or "b" is controlled. The actual value (position of valve spool) is signalled by an inductive transducer measuring system and compared to the externally signalled command value. Occurring differences between actual and command value are levelled out.Through the connection of a positive voltage (U > 8,5 V) at terminal 3 the controller and the F output stage are released. Ordering code VT 11 0_ _ –1X / * Amplifier module Further details in clear text for proportional directional valves type 4WRE6 = 23 1) 1X = Series 15 to 19 for proportional directional valves type 4WRE10 = 24 (15 to 19: unchanged technical data and terminal 1) for proportional directional valves type 4WRE6 = 74 connection) 1) = 75 for proportional directional valves type 4WRE10 1) 1) with V spool Compatible with units of series 10 to 14, when terminal 6 was not connected to ground (0V) in these units (see project instructions page 4). 1/4 RE 29 739/10.95 Technical data (For application outside these parameters please consult us!) Operating voltage U + 24 VDC + 40 % –10 % B Function range: – upper limit value u (t) + 35 V B max – lower limit value u (t) + 21 V B min Max. current consumption I 2 A Fuse I 3 A; sluggish; after release self-activating Inputs: 1) – Differential input (command value input) U 0 to ± 10 V; R = 50 kΩ (standard) e e – Release • active U 8,5 V < U < 40 V F F • inactive U < 6,5 V F – Demodulator input (positional measuring system) R > 50 kΩ e Ramp time (setting range) t 10 ms to 5 s Outputs: – Output stage • Solenoid current/resistance VT 11023 I 1,8 A; R = 5,4 Ω max (20) VT 11024 I 2,2 A; R = 10 Ω max (20) VT 11074 I 1,8 A; R = 5,4 Ω max (20) VT 11075 I 2,2 A; R = 10 Ω max (20) • Pulse frequency f freely pulsating up to ca. 1,5 kHz – Driver for the inductive transducer f 5,8 kHz ± 10 % • Oscillator frequency • Max. capacity I 30 mA • Voltage amplitude (U ) U 5 V per output SS a • Max. stroke of transducer VT 11023 s 2,8 mm s 4,0 mm VT 11024 VT 11074 s 2,8 mm VT 11075 s 4,0 mm – Test points • Command value wU 0 to ± 5V w • Actual position value xU 0 to ± 5V x Type of connection 12-pin terminal strip Housing dimensions (W x H x D) 40 x 79 x 85,5 mm 2) Permissible temperature range t 0 to 50 °C to DIN/IEC 68-2, T1, T2, T14 and T30 2) Storage temperature range t – 25 to + 85 °C to DIN/IEC 68-2, T1 and T2 2) Disturbance resistance Class 3 to prEN 50082 T2 2) Mechanical loadability to DIN/IEC 68-2, T6, T24 and T27 Weight m 0,14 kg 1) Current input on request 2) Further details on request Response in case of error Error → Missing Cable break Asymmetry of Cable break 1) release (U < 6,5 V) transducer internal supply voltage current input F Response of Electronics → E, R, AE, R, AE, R, AS, A 1) only in special versions with current input 4 to 20 mA (on request) Meaning of abbreviations: E = Output stage is switched off (solenoids are moved into currentless state) R = Controller is switched off S = Command value is set to 0% A = Multifunction display is illuminated 2/4 RE 29 739/10.95 Block circuit diagram/ VT 11023, VT 11024, VT 11074 and VT 11075 (from series 15) only in special versions with current input 4 to 20 mA (on request) 5 6 3 Release + U 7 F u b PI 8 i H1 10 11 Differential input 4 Reference potential 5 6 u(i) 9 5 a 0 V to + 10 V → b u u PI 0 V to – 10 V → a 10 2 i 8 3 4 1 Gw 2 1 PI Σ 3 4 t Gx 11 1 + UM + U B DC + Operating voltage M0 2 Zx DC 0 V – UM 12 1 12 ≈ = 9 power 6 2 7 1 1 Ramp generator 6 Output stage Actual value 0 to ± 5 V H1 Multifunction display Zx Zero point position 7 Oscillator/Demodulator 2 Step function generator 2 Command value 0 to ± 5 V transducer 023 and (only with VT 11 8 Differential amplifier 3 Measuring zero Gw Command value reduction VT 11 024) 9 Power supply 4 Measuring zero 3 Summator Gx Actual value adjustment 10 Monitoring t Ramp time 4 Controller for spool position 11 Proportional valve 5 Current controller 12 Position transducer Positive command value causes current increase in solenoid "b" and flow from P to A and from B to T. Negative command value causes current increase in solenoid "a" and flow from P to B and from A to T. Terminal connection   1 7 + U B Operating Connection   solenoid "b" voltage 2  0 V 8  Release U 3 9  F Connection  solenoid "a" Reference  4 10  Differential potential  input   5 11 ±U Com Position  transducer Position 2 6 12 1  connection transducer connection Connection cable (recommendation): – Position transducer→ 3-strand cable, single screened, 2 cross section max. 1,5 mm – Solenoid connection→ 2 or 4-strand cable, single screened, 2 cross section max. 1,5 mm – Differential input → 2-strand, single screened 3/4 RE 29 739/10.95 Project / Maintenance instructions / Additional information – The amplifier module may only be connected when switched off! – Do not connect earth terminal of inductive transducer to ground! – Do not connect terminal 6 to ground, earth or screen; otherwise function disturbance may occur! (This was also not allowed with units of series 10 to 14, but did not lead to function disturbances.) – Always screen command value lines and lines of the inductive transducer separately, screen open at valve; connect screen to 0 V operating voltage (terminal 2) on module side only, in order to avoid coupling! – Do not lay lines near power cables! – Do not use free wheel diodes in the solenoid lines! – The distance to arial lines, radio sources and radar equipment must be at least 1 m! – Because of the load current of the integrated smoothing capacitor external fuses must have slow characteristics! – Warning: • When using the differential input (command value as voltage signal) both inputs must always be switched on or off simultaneously! • When assembling this module amplifier a minimum distance of 2 cm on both sides must be guaranteed! • The actual value adjustment (potentiometer "Gx") is calibrated by the factory and must not be altered! Unit dimensions (Dimensions in mm) Carrier rail NS 35/7,5 to DIN 50 022 78 9 10 11 12 H1: Multifunction indicator (see page 2) REXROTH power: Internal supply voltage VT 11023-1X Gw: Command value reduction Gw t: Ramp time power t Gx: Actual value adjustment Gx H1 Zx: Zero point position transducer Zx Test point 1: Actual value 0 to ± 5V 1 2 Test point 2: Command value 0 to ± 5V 3 4 Test point 3: Measuring zero 1 2 3 4 5 6 Test point 4: Measuring zero 85,5 40 Mannesmann Rexroth Limited Mannesmann Rexroth GmbH Cromwell Road, St. Neots, D-97813 Lohr am Main Huntingdon, Cambs. PE19 2ES Jahnstraße 3-5 • D-97816 Lohr am Main Tel: (01480) 476041 Telefon 0 93 52 / 18-0 • Telefax 0 93 52 / 18-10 40 Fax: (01480) 219052 Telex 6 89 418-0 The specified data is for product description purposes only and may not be deemed to be 4/4 guaranteed unless expressly confirmed in the contract. All rights reserved – Subject to revision 79