Specifications

EATON Screw-In Cartridge Valves E-VLSC-MC001-E2 May 2015 C-23.A
C
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Electronic Controls
“Soft Switch” Power Plugs
0V
24V DC
Power
input
Command
Signal
Power
amp.
PWM
Dither
Gain
Ramp
+
–
1
2
3
4
(NC)
Max.
limiter
X1
X2
2k7W
Solenoid
Deadband
Electrical Block Diagram
EHH-AMP-702-C-*
10 Series
Note: This product has been
designed and tested to meet
specific standards outlined in
the European Electro-magnetic
Compatibility Directive (EMC)
89/336/EEC, amended by
91/26/EEC, 92/31/EEC and
93/68/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
2468. Wiring practices relevant
to this Directive are indicated
by a warning symbol and
Electromagnetic Compatibility
(EMC).
EHH-AMP-702-C-*
10 Series
For use with valve types:
EPV**-12D-1*
EFV1-**-012DE*
ERV1/2**-12D-1*
EPRV1/3**-12D-1*
ESV1**-12D-1*
IRV**-012D-1*
PFR21*
PFR24*
PDR21A*
PPD22**-012D-1*
Application
Focus applications for this plug
are in the control of hydraulic
solenoid operated directional
and pressure control valves
where control of valve response
time can significantly reduce
shocks in the hydraulic system.
Best results in reducing
hydraulic shocks will only be
obtained by using valves with
the right “low shock”, or “
proportional” features.
General Description
These plugs, conforming to
ISO 4400/DIN 43650 interface,
offer adjustable, ramped on/off
switching times through the
use of an integral amplifier.
The switching time range
is 50 ms to 5 seconds.
The soft switch plug is rated
for 24V DC nominal and
controlled by a 24V logic
signal. Applying an “on” signal
causes the output current to
ramp up to, and stay at, an
adjustable maximum while the
“on” signal is maintained. At
“switch-off” the output current
is ramped down to zero and
will remain at zero until the
next “on” signal.
Ramp times (switching times)
can be adjusted by an in-built
potentiometer.
An adjustment also allows
for compensation of any
deadband in the valve.
Features and Benefits
• Integral amplifier provides
control from on/off logic
command signal
• Adjustable ramp time
• Deadband compensation
• Adjustable output level
• Adjustable dither
• EMC to latest European
standards
• Improved switching time
repeatability
• Fully short-circuit and
reverse-polarity protected
• Protection to IP67
.B