Festo Пропорциональные регуляторы давления MPPE - Handbuch (Seite 6)

4.2 Pneumatic
• Remove the sealing elements from the compressed air ports.
• Attach the pneumatic tubing to the following connections (position of the con-
nections Fig. 1):
– Compressed air supply port 1
– Air supply port 2
• Screw a silencer (accessories www.festo.com/catalogue) into the exhaust
port 3.
4.3 Electric
Warning
• Use only PELV circuits in accordance with IEC/DIN EN 60204-1 (protective
extra-low voltage, PELV) for the electrical power supply.
• Also observe the general requirements for PELV circuits in accordance with
IEC/DIN EN 60204-1.
• Use only power sources that guarantee safe electrical isolation of the operat-
ing voltage in accordance with IEC/DIN EN 60204-1.
• Note the rating plate.
A distinction is made between the following valve variants ( Fig. 5).
Designation on the rat-
ing plate MPPE-...-010B MPPE-...-420B
Designation Voltage variant Current variant
Electrical setpoint value DC 0 ... 10 V 4 ... 20 mA
Fig. 5
Note
• Check the use of the following options on the MPPE-3-... :
– Reference voltage V
ref
of DC 10 V on the valve
– Scanning an external pressure sensor
– Measuring the actual voltage/current value
• Use the following accessories (accessories www.festo.com/catalogue):
– Socket with cable or
– Plug socket and
– shielded cable.
You can then guarantee that the specified protection clss IP 65 and EMC are
fulfilled.
• Wire the screening with earth potential at the cable end away from the MPPE.
Note
Make sure that the cable is laid as follows:
– not squashed
– not bent
– not stretched
Fig. 6
• Wire the MPPE-... according to one of the connection diagrams:
Voltage variant with external set
value voltage Voltage variant with potentiometer
Pin
Uv
G nd
Uref
w
G ND
0..10 V
x
7
3
5
4
2
6
8
G ND
V
X extin
1
Pin
U v
G nd
U ref
w
G N D
x
7
3
5
4
2
6
8
G N D
V
X ext in
1
Fig. 7 Fig. 8
Current variant
Pin
Uv
G nd
U ref
w
G N D
x
7
3
5
4
2
6
8
G N D
A
X ext in
4..20 m A
B ürde m ax. 300
1
Fig. 9
The individual pins on the electrical connection are assigned as follows:
Pin num-
ber Description Voltage
variant Current
variant Cable col-
our
3)
3
7
2
4
1
6
8
5 1 X extin
- with actual value
reader
- without actual value
reader
DC 0 ... 10 V
1)
4 ... 20
mA
-
White
(WH)
-
2 Setpoint value 2) GND GND Brown
(BN)
3 Supply 2) GND GND Green
(GN)
4 Setpoint DC 0...10 V 4...20 mA Yellow
(YE)
5 Ref. output DC 10 V DC 10 V Grey (GY)
6 Actual value output DC 0...10 V 4...20 mA Pink (PK)
7 Supply voltage DC 24 V DC 24 V Red (RD)
8 Actual value
2)
GND GND Blue (BU)
1) Connect to GND for hardware versions from 1.11.98 (see rating plate).
For older hardware versions: no assignment.
2) Connected internally
3)
When using the socket with cable type KMPPE-...
Fig. 10
5 Commissioning
1. Supply the MPPE-... with direct current
(supply voltage U
v
= DC 24 V).
2. Supply the MPPE-... with a setpoint sig-
nal.
3. Pressurise the MPPE- with an input pres-
sure higher than the maximum required
output pressure.
A proportional output pressure P
s
is then
set.
Different pressure ranges are assigned to
the setpoint signal range DC 0 ... 10 V
and 4 ... 20 mA depending on the design
(
Fig. 13 and Fig. 14):
Fig. 11
24 VDC
3
7
Fig. 12
4..20mA
0..10V
3
7
2
4
1
6
8
5
Fig. 13
10 [V]
20 [mA]
[bar P]