RA 29 904/06.98 - Airline Hydraulics

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98 Technical data (For applications outside these parameters, please consult us!) Operating voltage Operating range – Upper limiting value – Lower limiting value VDC VDC(t)max VDC(t)min 24 VDC + 40 % – 5 % 35 V 22 V Power consumption I <1A Fuse I 2. 5 A MT R130 t t - Ramp time "down" w - Command value I - Actual current value J14 w I Max. When switching the command value voltage on or off it must be taken care that both signal and reference potential are switched simultaneously. 5 A MT = + 0 V ( ) 18ac 2 x 220 µF Block circuit diagram / pin allocation VT 2000-5X Measuring zero (M0) is raised by 9 V compared to 0 V operating voltage ! F "I" 8 Actual current value at "I" 1 mV ∆ 1 mA M0 = Command value attenuation t = Time setting upward ramp Pulse generator t = Time setting downward ramp Power supply R130 = Biasing current (0 to 300 mA) Differential input Summation 5 6 Current regulator with summator Current amplifier 3 Max. Is the external potentiometer correctly connected? (for the connection, see figure on the top left) 6. 5 Ω 0 to 300 mA (adjustable using R130 on the printed circuit board) 100 Hz or 200 Hz ± 10 % (dependent on setting with jumper J27) + 6 V; Ri = 1 kΩ 0 to 800 mV 0 to 800 mA Type of connection 32-pin blade connector, DIN 41 612, form D Card dimensions Euro-card 100 x 160 mm, DIN 41 494 Front panel dimensions – Height – Width solder side – Width component side 3 U, 5. Therefore do not connect measuring zero (M0) to 0V operating voltage ! – For switching the command values, use relays with dry contacts (small voltages, small currents) ! – Always shield command value cables; connect the shield on the card side to the 0V operating voltage, leave the other end open ! Recommendation: Also shield solenoid cables ! For solenoid cables of up to 150 ft (50 m) length use stranded 16 AWG (LiYCY 1. 100 Hz or 200 Hz Gw J27 t t - Ramp time "up" X1 F 2. The time constant of this signal can be set separately for the upward and downward ramp via two potentiometers. 98 VT 2000 amplifiers are suitable for the control of direct and pilot operated proportional pressure control valves without electrical position feedback. (330) 263-3400 Fax: (330) 263-3333 6/6 All rights reserved – Subject to revision Printed in U. Is the solenoid correctly connected? When the card is removed, a resistance of approx. 98 Functional description The command value voltage for the VT 2000 proportional amplifier is entered directly at the command value input 1 or via an external command value potentiometer using the regulated voltage + 9 V of the power supply [8]. The current command value is modulated with the pulse generator signal [7]. 08 mm) = 1 division 3 HP = 3 divisions Permissible operating temperature range t Storage temperature range t +32 … +122 °F (0 … 50 °C) to DIN/IEC 68-2, T1, T2, T14 and T30 1) –13 … +185 °F (– 25 … + 85 °C) 1) Resistance to internal faults Class 3 to DIN/VDE 843 T2 and T4 1) Mechanical loadability To DIN/IEC 68-2, T6, T24 and T27 1) Weight 1) 2/6 For further details please consult us ! m 0. In addition, the command value is led via the current regulator [5] to the current output stage [6]. Note: The output stage switches off in the case of excessive temperatures (e. Is the operating voltage applied? Measure contacts 24ac against 18ac 2. (See RA 30 111) Unit dimensions: dimensions in (millimeters) Gw 3U 5. As a result of the external contacts "ramp up/down off", the upward and downward ramp times can be set individually to their minimum value (approx