Proportional Pressure Valves
Series RE*T / R*V
Operation Manual
15
Parker Hannifin Corporation
RE_-R_V obe_24-45-A-B 5715-651 UK 29.01.19
Command signal input:
The solenoid current behaves proportional to the
command signal amplitude.
Details are shown from the technical specifications.
The command input signal needs to be fil-
tered as well as free of inductive surges and
modulations. Due to the sensitivity of the
valve a high signal quality is recommended,
this will prevent malfunction.
Incorrect signal amplitude levels may disturb
the functionality and can damage the valve.
The option 4...20 mA uses the “0 mA“ con-
dition as breakdown-information. This means
the presence of an evaluable failure infor-
mation if the input signal line is interrupted.
In this case the actuator drive will be swit-
ched off. The drive will switch on when the
input signal reaches a value of 3.8 mA, it
switches off when the command falls below
3.6 mA. This determination follows the NA-
MUR-specification NE43.
NAMUR is an association of users of process
control technology.
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 30 V! Non-observance
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.
Wiring diagram of supply voltage
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