Power Plugs for Proportional Valves

Transcription

1 Vickers Amplifier Cards Power Plugs for Proportional Valves EHH-AMP-70-D/J/K; * Series Features and Benefits For use with valve types: KDGV-(S)-H*-6* KTGV-(S)-H*-6* KDGV-5-H*-* KTGV-5-H*-* KCG-/6/8-H-* KX(C)G-6/8-H-* KDG5V-5/7/8-H-* CMX***-E-G EPV**-D-* ERV/**-D-* EPFR**-D-* General Description Three types of plugs, conforming to ISO 00/DIN 650 interface, with integral amplifiers and necessary adjustment potentiometers, are designed for use with non-feedback hydraulic valves. This plug/valve combination offers very low cost solutions to many hydraulic control problems requiring proportional control. Type D is controlled with a 0- command signal, and has adjustable gain, ramp, deadband compensation and dither. Type J, designed for closed-loop applications, is controlled with a 0- command signal, and has no ramp function. Type K is controlled with a -0 ma command signal, and has an adjustable ramp time of 50 ms to 5s. Integral amplifier provides essential functions for control of proportional valves Adjustable ramp time (types D and K), gain, deadband compensation and dither Ease of installation, with reduced cost Fully short-circuit and reverse-polarity protected Differential voltage command signal (types D and J) Electrical Block Diagram EHH-AMP-70-D/J/K-* Power input V DC + + Command signal Type J does not have the ramp function. Model Code EHH-AMP-70- Ramp * - * Dither Gain Deadband Adjustable dither EMC to latest European standards Protection to IP67 Application Primary applications are in the control of directly operated, non-feedback proportional valves where the cost of more sophisticated electronic controls can be avoided. Type J is for closed-loop applications. Max. limiter PWM Power amp. X Solenoid X D J K Adjustment range = Proportional plug: 50 ms to 5s = Proportional plug without ramp function = Proportional plug: -0 ma Design number, 0 series Subject to change. Installation dimensions unaltered for design numbers 0 to 9 inclusive. This product has been designed and tested to meet specific standards outlined in the European Electromagnetic Compatibility Directive (EMC) 89/6/EEC, amended by 9/6/EEC, 9//EEC and 9/68/EEC, article 5. For instructions on installation requirements to achieve effective protection levels, see this leaflet and the Installation Wiring Practices for Vickers Electronic Products leaflet 68. Wiring practices relevant to this Directive are indicated by Electromagnetic Compatibility (EMC). August 996 GB-5E

2 Operating Data Electrical Connections Power (input) supply Absolute maximum voltage Max. power consumption incl. solenoid Reverse polarity protected Short circuit protected Types D and J V DC (power and signal) Positive command signal Negative command signal Type K 0- DC including 0% maximum ripple (peak-to-peak) V DC nominal 5W Yes Yes Maximum output current,6a Max. output voltage typical (,6A output Typically,5V below supply voltage current) Command signal 0- (0 kohms) -0 ma (50 ohms) Deadband triggering For output (LED ON) For no output (LED OFF) Deadband adjustment range 00 mv 00 mv to 0 mv to 00 mv 00 to 000 ma ma -0 ma 0- ma Gain adjustment range 0.0 A/V to 0.6 A/V 0.0 A/mA to 0.08 A/mA Dither adjustment range Ramp time (types D and K only) PWM frequency Dither frequency Protection Isolation to VDE 00 Electromagnetic compatibility (EMC): Emission Immunity Mechanical Housing 0 to 500 ma 50 ms to 5s 00 Hz 0% 0 Hz 0% IEC 59: IP67 (when correctly installed with interface seal in place) Fully short-circuit and reverse-polarity protected Group B EN EN Mounting interface ISO 00 (DIN 650) Cable clamp Cable diameter Wire section Temperature, ambient range Mass PA6 glass-reinforced plastic (conforming to UL-9HB). Color: gray Pg9 screw type Ø 5 to 0 mm (0.97 to 0.9 dia) 0,5 to,0 mm (0 AWG-7 AWG) 0 to +70 C ( to +58 F) 0,07 kg (0.5 lb)

3 Input/Output Characteristics Types D and K Type J Command signal Type K Type D Command signal voltage U s 0 ma ma ma 8V 6V V V 8V 6V V V Output current Ramp setting Output current U S Gain setting U S Gain setting Deadband compensation Deadband compensation Installation Dimensions in mm (inches) rd angle projection 88 (.5) (0.87) 9 (.5) (.) Solenoid Connections No connection (or ) 8 (.5) (or )

4 Installation Data Adjustments Gain Ramp LED Deadband Dither Ramp time: Turn clockwise to increase ramp time. (Only types D/K) Gain: Turn clockwise to increase gain. Deadband compensation: Turn clockwise to increase deadband compensation current. Dither: Turn clockwise to increase the dither current. Terminal : Power supply - DC, positive. Terminal : Power supply. Terminal : Command signal positive (see Operating Data ). Terminal : Command signal negative (see Operating Data ). Installation Wiring Options Positive Command Voltage + V EHH-AMP-70-D/J-0 Bi-polar Command Voltage for Operating Two Solenoids from One Signal EHH-AMP-70-D/J-0 V V + Negative Command Voltage EHH-AMP-70-D/J-0 V EHH-AMP-70-D/J-0-0 ma Command Signal V -0 ma EHH-AMP-70-K-0 Connections when replacing 0 design power plug with 0 design and only wires exist EHH-AMP-70-D/J/K-0 V Customer s protective ground connection. Link pin to pin Warning: Electromagnetic Compatibility (EMC) Screened cables should be used and particular attention paid to the grounding of the screens as shown in the above diagrams.

5 Installation Data Assembly Showing Wiring Connection Points Warning Ensure cable clamp nut is adequately tightened to secure the cable. Do not connect, or disconnect, the plug while power is on. Do not mount, or dismount, the plug while power is on. Wiring Preparation 0,5-,0 mm (0 AWG-7 AWG) 5 (0.) Ø5-0 ( dia) 0 (.6) All seals must be fitted correctly at plug installation to provide protection to IP67 (IEC 59). 5

6 Start-Up Procedure Correctly wire the plug and, before mounting it on the valve solenoid, apply V DC (0 to limits) to the power input terminals. Check for correct plug function by illumination/non-illumination of the LED. The LED should illuminate when the demand applied to the signal input terminal is between 00 mv and (or ma and 0 ma) and should not be illuminated when the applied demand is less than 00 mv ( ma). If there is a malfunction a new plug must be fitted. Spare Parts The only spare part available is the interface seal, part number 700. Ordering Procedure Order plug by full model code, and spare interface seals by part number 700. Switch off power supply and command/input signal and then install plug on solenoid. Ensure that all seals are fitted correctly and clamped as the retaining screw is tightened: this is essential in providing IP67 protection. Ensure that the hydraulic system will not cause any erratic movement of actuators, then: Switch on power supply again. Repeat LED/function check as in. An LED malfunction now indicates a short circuit at the load. Successful completion of these checks means that the plug and load are ready for use. 6