Disassembly And Exchange; Care And Maintenance - Emerson Aventics EV07 Mode D'emploi

AVENTICS | EV07 | R414001175–BAL–001–AB | English
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Contact 3 of plug 2 is a constant +10 V DC on devices with supply of a set
point potentiometer.
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For devices with actual current value, the electrical reference point (-) for
the actual value (+, contact 3 of plug 2) is contact 1 of plug 1 (supply
voltage).
O Make sure before connecting the plugs that all seals and caps are included and
not damaged.
O Only use tested plugs and cables.
O Use a shielded line to connect plug 2 (set point-actual value).
O The shield on plug 2 must be connected to the FE contact on the plug and to the
system.
O A shielded line does not need to be used to connect the supply voltage.
O Protect the supply voltage with an external M 0.5 A fuse.
The EV07 pressure regulator can now be supplied with voltage and controlled
with a set point.
8 Commissioning
Defective seals or leaky connections
Liquids and foreign objects could penetrate the device and plug connections and
destroy the electronics.
O Before commissioning, make sure that all seals and plugs are leaktight.
O Never open the device.
Malfunction due to atmosphere containing oil!
Oil may clog the housing ventilation port. This will change the characteristic curve.
O Never operate the device in an atmosphere containing oil.
Switching on the pneumatic and electrical supplies
Danger of destruction to connected devices if switched on in the wrong order
If the valve is first connected to the electric supply and then the pneumatic supply,
overshooting may cause the pressure in the working line to reach a level that is
much higher than the set pressure. The pressure in the working line may even
reach the level of the supply pressure before the adjusted pressure is reached.
O Make sure that the connected devices are resistant to the max. supply
pressure.
O Always comply with the order for switching on the devices.
Connected devices may be destroyed due to process-related leaks.
If switched on in the proper order, the device is first connected to the pneumatic
supply and then the electric supply. If the device has not yet been connected to the
electric supply, contamination may cause the poppet valve to leak, causing the
pressure in the working line to reach the level of the supply pressure.
O Make sure that the connected devices are resistant to the max. supply
pressure.
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 EV07 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 EV07 pressure regulator.
O To do this, the EV07 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.
NOTICE
NOTICE
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Fig. shows a function block diagram for an EV07 pressure regulator without
analog output.
1 Inlet connection 1 for supply pressure
2 Outlet connection 2
3 Actual output value
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 „Connecting the supply voltage and set point").
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 (0,15) bar. This means that set
points with an outlet pressure of less than 0,1 (0,15) 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 EV07 pressure regulator
1. Stipulate a set point of 0 bar to exhaust the EV07 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 EV07 pressure regulator
1. Disassemble the EV07 pressure regulator (see „Disassembling the EV07
pressure regulator").
2. Assemble a new EV07 pressure regulator (see „Assembly").
11 Disposal
O Dispose of the EV07 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 EV07 pressure regulator
No special care is required for the EV07 pressure regulator. Note the following if you
would like to clean the device:
4 Nominal input value
5 Exhaust
NOTICE
NOTICE
WARNING
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