Emerson AVENTICS AV-EP Serie Instrucciones De Servicio página 26

6 Operating Mode
AV-EP pressure regulators are always used together with an AV-EP base plate that
represents the interface between the valve system and the AV-EP pressure regu-
lator.
Pressure regulators in combination with switching valves
Damage to the individual components or reduction in service life!
If you use pressure regulators in combination with switching valves in a valve
system, you must observe the following to avoid damaging the individual com-
ponents:
- Do not exceed the maximum operating pressure of 8 bar in AV valve systems
with an internal pilot air supply for the switching valves.
- Do not exceed the maximum operating pressure of 10 bar with an external pi-
lot air supply.
If you still want to operate the pressure regulator at the maximum operating
pressure of 11 bar, you must note the following:
- The pilot air supply for the switching valves must be external.
- Position a supply plate that blocks supply air channel 1 directly upstream of
the pressure regulator.
- For single pressure control, position an additional supply plate between the
pressure regulator and the downstream switching valves to block supply air
channel 1.
- If using several single pressure controls in a row, one supply plate positioned
upstream of the adjacent switching valves is enough.
Make sure that the operating pressure lies at least 1 bar above the
maximum output pressure to be controlled. Otherwise, only a reduced
operating pressure range will be available.
6.1 Pressure zone control
All pneumatic connections are located in the AV-EP base plate.
The AV-EP base plate receives the operating pressure from the pneumatic supply
plate (32) on the left side. The base plate forwards the operating pressure to the
AV-EP pressure regulator. The regulator adjusts the pressure to the specified set
point and forwards it to the components to the right via the base plate. The pres-
sure of the pressure zone control is applied up to the end plate or the next supply
plate that blocks supply air channel 1. The exhaust travels through the collector
channel to the next pneumatic supply plate.
AV-EP pressure zone control in the AV05 valve system
If you use a pressure zone control in the AV05 vale system, we recommend exter-
nal pilot air, since the air for the pilot is taken from the last pressure zone. As a re-
sult, the pressure of the pilot air corresponds to the pressure controlled by the
AV-EP pressure regulator. In individual cases, the valves may experience malfunc-
tions.
32
AV-EP
2
3 1
5 3 1
P
Fig. 7: Pneumatic function block diagram for the pressure zone control
32 Pneumatic supply plate
34 Valves
AVENTICS™ AV-EP | R414007537-BAL-001-AB | English
NOTICE
33 34
33 AV-EP pressure regulator
35 Right end plate
6.2 Single pressure control
The AV-EP base plate receives the operating pressure from the pneumatic supply
plate (32) on the left side. The base plate distributes the volume flow from the
supply connection as follows:
• The single pressure control takes as much supply air as necessary to control
the specified set point. The single pressure control forwards the controlled
pressure via the base plate working connection to the connected consumer.
• The portion of the volume flow that is not required is forwarded by the base
plate to the components to the right of the single pressure control.
The exhaust travels through the collector channel to the next pneumatic supply
plate.
The AV-EP pressure regulator should always be placed as close to the
pneumatic supply plate as possible. We recommend assembling the
AV-EP pressure regulator directly to a pneumatic supply plate. Observe
the rules for configuring the valve system.
32
5 3 1
P
Fig. 8: Pneumatic function block diagram for the single pressure control
32 Pneumatic supply plate
34 Valves
6.3 Response to power failure
The response to a power failure depends on how the AV-EP pressure regulator
was configured on delivery. In the event of a power failure, the device either ex-
35
hausts the operating line or briefly maintains the operating pressure, depending
on the configuration.
Refer to the section 5.1
u
your device responds to a power failure.
7 Assembly
Assembly of a complete valve system is described in assembly instructions
R412018507 "Valve system assembly and connection, AV03/AV05".
The assembly of individual AV-EP components is described in chapter 13
g 13. Integrating AV-EP into an AV valve
8 Operation and Displays
8.1 LEDs in devices for fieldbus connection
47
33 34
AV-EP
2
3 1
2
A
33 AV-EP pressure regulator
35 Right end plate
g 5.1 Product identification
system.
The LEDs serve to monitor voltage and diag-
nosis.
On devices without display, the LEDs (47) are
on the rear.
35
for information on how
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