Aventics ED07 Instrucciones De Servicio página 13

AVENTICS | ED07 | R414001671–BAL–001–AE | English
8 Triggering the ED07 pressure regulator
You can continually adjust the pressure once you have connected the pneumatic and
electrical supply on the ED07 pressure regulator. To do this, the ED07 pressure
regulator is e.g. controlled via a controller or potentiometer using a set point.
The electronics compares the set point with the output pressure, which is measured
by a pressure sensor, and generates a control variable, which in turn triggers the
venting or exhaust valve via the U/I converter and proportional solenoids. This sets
the stipulated pressure.
24 V
42
A
43
D
CONTROLLER
A
44
D
45
Fig. 4: Function chart
c
Inlet connection for supply pressure
d
Outlet connection
e
Ventilation
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. The electronics reduces the current
consumption and thus the maximum nominal width to prevent the ED07 pressure
regulator becoming hot.
Danger of burns caused by hot coils!
Touching the valve coils during operating may lead to burns.
O Let the device cool off before disassembling it.
O Do not touch the device during operation.
O Always select a supply pressure that is higher than the outlet pressure.
"Pressure reached" switch output
The "Pressure reached" switch output is only featured on "ED07 pressure
regulators with M12 integrated plug X1S and M12 integrated socket X2M,
M12".
The ED07 pressure regulator with M12 integrated plug X1S and M12
integrated socket X2M recognizes whether the required output pressure is
set within a tolerance band of 2% FS.
The switch output on pin 1 of the M12 integrated socket X2M is triggered at a value
equal to the supply voltage or 2.0 V lower (high level) as long as the actual value is
close to the set point in the tolerance band.
If the actual value is outside the tolerance band, a voltage of < 2.0 V DC (low level) is
supplied to the switch output.
This signal can be used to enable further process steps, for instance.
Controlling the pressure
Depending on the version, the output pressure of the ED07 pressure regulator can
be controlled via the current, voltage or a potentiometer.
Depending on the version, the characteristic curves in the following section depicts
the linear interrelation between current and outlet pressure or voltage and outlet
pressure.
The device generates the supply voltage for the potentiometer in devices with an
external potentiometer. The potentiometer sliding contact is connected to the set
point input (see „Connecting the supply voltage, set point, and external sensor").
1. Select the right characteristic curve according to the output pressure and device
number.
2. Define the required output pressure.
3. Refer to the current or voltage characteristic curve to set the required output
pressure.
4. Depending on the model, control the outlet pressure either via the controller or a
potentiometer.
3 2
U
I
U
I
U
P
1
00121356
42 Supply voltage
43 Nominal input value
44 Actual output value
45 Switch output
CAUTION
Characteristics
The characteristic curves for all ED07 pressure regulator versions are listed in the
following.
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 (6).
O Never operate the device in an atmosphere containing oil.
Characteristic curve for current
control with actual output value
[bar]
P
a, max
0,75 x P
a
0,5 x P
a
0,25 x P
a
P
a, min
0 4 8 12 16 20
0,1
4 8 12 16 20
4,08
P = output pressure
a
9 Disassemble, replace and dispose of ED07
pressure regulator
Disassembling the EV07 pressure regulator
Connecting or disconnecting plugs when under voltage will damage the device!
Large differences in potential occur when connecting or disconnecting plugs
under voltage, which could damage the device.
O Make sure the relevant system component is not under voltage before
assembling the device or when connecting and disconnecting plugs.
Danger of burns caused by hot coils!
Touching the valve coils during operating may lead to burns.
O Let the device cool off before disassembling it.
O Do not touch the device during operation.
The following switch-off sequence must be observed in order to disassemble the
ED07 pressure regulator.
1. Stipulate a set point of 0 bar to exhaust the ED07 pressure regulator and the
outlet line on the outlet pressure connection.
2. Switch off the 24 V DC supply voltage.
3. Remove the connected plugs.
4. Switch off the supply pressure.
5. Undo the four M5x90 screws.
The ED07 pressure regulator can now be removed.
Exchange the ED07 pressure regulator
To replace the ED07 pressure regulator, you must first disassemble it as described
above and then assemble a new ED07 pressure regulator (see Chapter 6 „Mounting
ED07 pressure regulator").
Dispose of ED07 pressure regulator
O Dispose of the ED07 pressure regulator in accordance with the currently
applicable regulations in your country.
NOTICE
Characteristic curve for voltage
control with actual output value
or via potentiometer
[bar]
P
a, max
0,75 x P
a
0,5 x P
a
0,25 x P
a
P
a, min
[mA] 0 2 4 6
0,05
[mA] 0
NOTICE
CAUTION
12
8 10 [V]
100 [%]