Disassembly And Exchange; Care And Maintenance - Aventics EV04 Série Mode D'emploi

AVENTICS | EV04 | R414001169–BAL–001–AA | English
Selecting the correct supply pressure
A permanent deviation will occur if the supply pressure is less than the outlet
pressure stipulated by the electrical set point.
O Always select a supply pressure that is higher than the outlet pressure.
Commissioning the EV04 pressure regulator
1. Switching on pneumatic supply.
2. Switching on the 24-V-DC supply voltage.
Setting the set point
O Enter the desired set point in the controller or potentiometer.
9 Control
You can continually adjust the pressure once you have connected the pneumatic and
electrical supply on the EV04 pressure regulator.
O To do this, the EV04 pressure regulator is e.g. controlled via a controller or
potentiometer using a set point.
– The electronics compare the set point with the outlet pressure, which is
measured by an internal pressure sensor.
– The electronics generate a control variable.
– The control variable controls the pressure of the pilot chamber using
directional valves.
– The valve is operated by the diaphragm.
The operating line is either supplied with pressure or exhausted depending on the
deviation. This sets the stipulated pressure.
7
Fig. shows a function block diagram for an EV04 pressure regulator without
analog output.
P1 Inlet connection 1 for supply pressure
A
Outlet connection 2
Controlling the pressure
Malfunction caused by closed housing ventilation port
If the housing ventilation port is closed, there is no atmospheric equalization and
the characteristics curve will change.
O Ensure that the air can circulate freely through the housing ventilation port (7).
O Never operate the device in an atmosphere containing oil.
Depending on the model, the set point can be controlled by the current, voltage, or a
potentiometer.
The device generates the supply voltage for the potentiometer in devices with an
external potentiometer. The sliding contact of the potentiometer is connected with
the set point input (see „Versorgungsspannung und Sollwert anschließen").
O Depending on the model, control the outlet pressure either via the controller or a
potentiometer. The characteristic curve depicts the linear interrelation between
current and outlet pressure or voltage and outlet pressure.
The devices have a set point entry at 0.1 bar. This means that set points with
an outlet pressure of less than 0.1 bar will be set to 0 bar and the outlet
connection exhausted.

10 Disassembly and Exchange

Disconnecting plugs when under voltage will damage the device
Large differences in potential occur when disconnecting plugs under voltage,
which could damage the device.
O Make sure the relevant system component is not under voltage before
disassembling the device.
Disassembling the EV04 pressure regulator
1. Stipulate a set point of 0 bar to exhaust the EV04 pressure regulator and the
outlet line at outlet pressure connection 2 (6).
2. Switch off the 24 V DC supply voltage.
3. Remove the connected plugs.
4. Switch off the supply pressure and exhaust the supply line.
5. Remove the pneumatic lines.
6. Remove the fastening screws depending on the mounting type.
Exchanging the EV04 pressure regulator
1. Disassemble the EV04 pressure regulator (see „EV04-Druckregelventil
demontieren").
2. Assemble a new EV04 pressure regulator (see „Montage").
R1
Exhaust 3
INPUT Nominal input value
NOTICE
NOTICE
11 Disposal
O Dispose of the EV04 pressure regulator in accordance with the currently
applicable regulations in your country.

12 Care and Maintenance

Dangerous movements
Danger of death, injuries or damage to property!
O Make sure the relevant system component is not under pressure or voltage
before assembling or when connecting and disconnecting plugs. Protect the
system against being switched on.
O Ensure personnel safety before switching on the device.
Servicing the EV04 pressure regulator
No special care is required for the EV04 pressure regulator. Note the following if you
would like to clean the device:
Damage to components
Solvents and aggressive detergents will destroy the surface, labeling and seals of
the device!
O Check that all seals and plugs for the plug connections are firmly fitted so that
no humidity can penetrate the EV04 pressure regulator during cleaning.
O Only clean the device using a slightly damp cloth. Only use water to do this
and, if necessary, a mild detergent.
Maintaining the EV04 pressure regulator
In normal ambient conditions
In normal operation, the EV04 pressure regulator is maintenance-free.
O However, the system-specific maintenance intervals must be observed.
In aggressive ambient conditions
The seals in the EV04 pressure regulator may age faster under aggressive ambient
conditions.
O Every now and then, check that the seals on the pressure regulator are in perfect
order. A damaged seal can be recognized by parts of the seal visibly protruding
from the housing gaps. Defective seals will lead to pneumatic leaks and non-
compliance with the IP54 protection class.
O Immediately exchange the device if the seals are defective.
13 Troubleshooting
Malfunction Possible cause
No output pressure No power supply
present
No set point stipulated
No supply pressure
available
Outlet pressure too Supply pressure too low
low
Outlet pressure less A load with high air
than the set point consumption results in a
large pressure drop in the
device.
Outlet pressure does Housing ventilation port is
not correspond to the closed
stipulated set point
EV04 pressure Exhaust port silencer is
regulator does not clogged
exhaust
WARNING
NOTICE
Remedy
Connect the power supply.
Check the polarity of the
power supply.
Switch on the system
parts.
Stipulate a set point.
Connect the supply
pressure.
Increase the supply
pressure.
Reduce air consumption
Use a device with a larger
nominal width
Ensure that the housing
ventilation port is open
Make sure the exhaust port
is open
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