On-Board Amplifier; Appearance Of The On-Board Amplifier; Wiring - YUKEN KOGYO ELDFG-01EH 10 Series Instruction Manual

5. On-board amplifier

5.1 Appearance of the on-board amplifier

Indicator Lamp
● Power Supply (Green)
Lights up when the valve is powered on.
● Deviation Alarm (Red)
Lights up when the spool travel deviates about 3% or more from the input value and does not
follow the input signal for one second or more.
CAUTION

5.2 Wiring

If necessary,
measures against AC
power noise, such as
inserting a noise filter.
AC Power Supply
Connect the earth
wire independently to
the earth terminal of
the control panel.
NULL Adjuster
This trimmer is used to adjust the neutral position of the
valve spool.
adjustment is required for the load conditions, remove
the protective screw (M5) and turn the trimmer behind
the screw.
protective screw. The adjustment range is about ±15%.
Do not remove the amplifier cover, since the amplifier contains
precision devices. Doing so may cause malfunction or failure.
take Use a stabilized power supply
dedicated to the valve.
Recommended power capacity:
75 VA or more.
DC Power Supply
Input (+)
Input Signal
Input (-)
Spool Travel Monitoring
COM
- 15 -
It is set by default.
After adjustment, be sure to attach the
Valve Spool Travel
Rated
Travel (+)
Rated
Travel (-)
Valve
EM-1359
If neutral position
Input Signal
NULL Adjustment Range