® Vickers Accessories Power Amplifiers for CVU**-EFP1 Electrohydraulic Proportional Throttle Valves EEA-PAM-571-A-14 Design but can be selectively disabled by � 1 ramp for acceleration and General Description suitable wiring to an external switch. deceleration. This basic amplifier is designed for � 24V DC power supply. The amplifier front panel contains LEDs driving Vickers type CVU-**-EFP1 � Pulse-width-modulated coil drives. showing the status of power, control proportional throttle valves in � Wider supply voltage range plus high supply and outputs. Potentiometers for applications requiring only one tolerance to ripple. adjusting ramp, deadband (adjustable) ramp setting for both � Low supply voltage protection. compensation and gain are also acceleration and deceleration. � Additional monitor points on edge mounted on the front panel. connector. Analog command input signals can be � Gain positioned in circuitry to give: non-inverting current, or non-inverting, Features - Ramp setting unaffected by gain inverting or differential voltages. The adjustment � Basic valve amplifier. amplifier requires a power supply of 24V - Constant trigger voltage for � Voltage and current command signals. DC and is enabled by a 24V logic deadband compensation. signal. The ramp is normally enabled Panel Display [1] 24V power supply input, green [2] 15V control supply output, green [3] Output (solenoid) enabled, yellow LEDs [4] Overload, red [5] LVDT failure, red [6] Output level to solenoid, yellow [7] Deadband compensation Potentiometers [8] Gain [9] Ramp [10] Monitor point �, conditioned command signal [11] Common ground 0V � [12] Monitor point �, LVDT (spool) position � ∅2 (0.0787 dia) sockets. Warning: Electromagnetic Compatibility (EMC) This product does not conform to the European Community directives for electromagnetic compatibility (EMC). It is only suitable for use within the European Economic Area in a sealed electromagnetic environment or as a spare for an existing machine. (Ref. UK Electromagnetic Compatibility Regulations 14 & 18, 1995.) 5103.00/EN/0897/A C.1 Operating Data Power (input) supply 20 to 34V DC x 40W max. 24V DC nominal <4V pk-to-pk ripple amplifier shuts down below 19V Control (output) supplies z22 +15V x 50 mA max. in addition to LVDT demand z2 +10V x 5 mA max. b2 –10V x 5 mA max. Command signal inputs: Direct voltage pins b8, b6, z8, b10 Inverting voltage pin z10 Voltage range 0 to 10V Input impedance (voltage) 47 kΩ Current pin z6 Current range 0 to 20 mA Input impedance (current) 100Ω Standing solenoid current at zero command signal 1.1A Deadband compensation: Factory setting 10% of max. stroke� Adjustment 0 to 50% of max. stroke� Gain control: Factory setting Max. spool stroke at 10V command signal� Adjustment per direction from centered position 1.9 to 20% of max. spool stroke per V� Ramp time adjustment, linear: Factory setting Max. time Adjustment 50 ms to 2s, under pre-set deadband compensation and gain conditions Dither Factory-set Feedback from LVDT b14 12 to 20 mA (100Ω) Overload protection, factory-set Automatic reset when fault removed Output enabled (power available to solenoid) z24 Apply 10 to 30V (6,8 kΩ) Output disabled (no power output to solenoid) z24 Apply ≤0,8V or open circuit Ramp enabled (machine actuator acceleration and deceleration limited by ramp potentiometer) b12/b20 Open circuit between b20 and b12 Ramp disabled (fastest acceleration and deceleration of machine actuator; ramp circuit bypassed) b12/b20 Link b20 to b12 Command signal monitor point 5V full scale. Command signal conditioned by deadband compensation, gain and ramp functions Spool position monitor point Front panel and z18 5V full scale Monitor point impedance Front panel and b18 10 kΩ Monitor point protection Short-circuit protected Output point to alarm indicator z12 >+6V when enabled <–6V when disabled Ambient temperature range 0 to 50�C (32 to 122�F) Mass 0,22 kg (0.48 lb) � From spool-closed position. C.2 Circuit and Connections z2 +10V 5 mA 24V zbd32 24V DC power b2 –10V 5 mA zbd30 supply Power zero z22 +15V 50 mA 15V z12 Monitor drive output Output enable 24V Close to enable output Output Current command z24 enable z6 Overload Voltage 100Ω low voltage b26 – commands 47 kΩ b6 b28 Power b8 stage + Dither z28 Ramp b10 z26 Gain z8 z10 Output PWM bdz4 Control zero z22 Deadband b14 Customer’s protective compensation ground connection Ramp b16 enable LVDT fail b20 b12 b18 Link to z18 bdz16 disable Command signal LVDT signal ramp monitor point monitor point on (conditioned) front panel on front panel Command Signals and Outputs Command signals Input pins Secondary pins ref. Type Ref. Signal polarity Non-inverting voltages b6/8/10 or z8 + bdz4 Non-inverting current z6 + bdz4 Inverting voltage z10 – Link one of b6/8/10 or z8 to bdz4 z10 – One of b6/8/10 or z8 Differential voltage One of b6/8/10 or z8 + z10 No connection LVDT Connections LVDT Amplifier Valve Wiring Connections plug pin pin Solenoid Connections 1 b14 Note: Connections not Pin 1 Pin 3 2 z22 polarity sensitive z26 (or z28) z28 (or z26) Pin 4 Pin 2 3 bdz16 4 – and screw terminals for wiring user-fitted into 19� rack housing designed Amplifier Cardholder, part number to accept a number of amplifiers. connections 02-104807 Vickers amplifiers (plug-in units of 3U Supporting products: Female Edge Connector for 19� Rack height to IEC 297) clip into this type of Power supply unit Mounting, part number 508178 cardholder, which prevents them from options EHH PSU 704 * 20 This female edge connector, DIN 41612 accidentally working loose. Cardholders Portable test type F48, has terminals to which the wires have a female edge connector to DIN equipment EHA TEQ 700 A 20 can be soldered. The connectors can be 41612, F32 for the amplifier connection C.3 Installation Dimensions in mm (inches) Plug-in Unit of 3U Height, to IEC 297 DIN 41612 F48 male connector 7.92 Mating connector can be F32 or F48 type (0.31) d-pin row Components b-pin row envelope z-pin row M2,5 x 11(0.43) long collar screws supplied with panel, for fixing 2,5 (0.1) 122,4 100 128,4 (4.819) (3.94) (5.055) Model designation 14,2 8 (0.31) (0.56) 3 (0.118) 175,24 7,45 3 (0.118) 7,2 (6.9) 14 (0.29) 40,3 (0.28) (0.55) (1.59) C.4