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D_FB-D_1FB 5715-669 UK.indd CM
Prop. Directional Control Valve
Series D*FB / D*1FB
Operation Manual
Parker Hannifin GmbH
Hydraulic Controls Division
Electrical Interfacing
Supply Voltage:
The supply voltage for the valve has to cover the
range of 18...30 V. The residual ripple may not
exceed 5% eff.
The applied power supply must comply to the
relevant regulations (DIN EN 61558) and must
carry a CE-mark. The operating voltage for
the valve must be free of inductive surges. Do
not exceed the max. value of 30V! Non-ob-
servance of this rule may result in permanent
damaging of the valve.
The increased inrush current of the valve
should be considered when selecting the
power supply. A stabilized power supply with
overcurrent limiting feature should not be
used. Due to the inrush current of the valve the
current limit circuit may respond prematurely
and create problems during energizing of the
supply voltage.
The operation of the valve is blocked if the
supply voltage polarity is interchanged.
Each valve requires a separate pre-fuse (ra-
ting: s. techn. data). Non-observance of this
instruction may create irreparable damage of
valve resp. incorporated system parts.
The shielding has to be assembled according the
outline below:
The backshell nut of the cable gland has to be
tighten with a suitable tool. The target value for the
tightening torque is 4 Nm. Tighten the cap nut with
a torque of approx. 5 Nm after attaching the female
connector on the socket outlet.
Incomplete tightening of backshell nut resp.
cap nut may result in automatic release of
the connection as well as degradation of the
water tightness.
Follow the “instructions for use“ for installation
of female connectors made by other kind of
brands!
The cable connection to the female connector
has to take place by qualified personnel! A
short between individual conductors resp. to
the connector housing , bad soldering as well
as improper shield connection may result in
malfunction and breakdown of the valve.
The mounting surface of the valve has to be
carefully tied to the earth grounded machine
frame. The earth ground wire from the valve
connecting cable as well as the cable shield
have to be tied to the protective earth terminal
within the control unit. It is necessary to use
a low ohmic potential connection between
control unit and machine frame to prevent
earth loops (cross section AWG 6).
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