3.
1.
1.
Pin allocation
The pins on the electrical connection are assigned as follows:
Fig. 5: Pin allocation
PIN
Wire colour
1)
Port identifications
VPPM-...-V1...
VPPM-...-A4...
1
white (WH)
Digital input D1
2
brown (BN)
+24 V DC supply voltage
3
green (GN)
Analogue input W- (- setpoint value)
4
yellow (YE)
Analogue input W+
(+ setpoint value)
0 … 10 V
Analogue input W+
(+ setpoint value)
4 … 20 mA
5
grey (GY)
Digital input D2
6
pink (PK)
Analogue output X (actual value)
7
blue (BU)
GND supply earth
8
red (RD)
Digital output D3
2)
1) With usage of the plug socket with cable as specified in accessories.
2) The hysteresis of the digital comparator output D3 is 0.5% FS.
Tab. 3: Pin allocation
Digital comparator output D3
The “Pressure reached” function permits monitoring of the pressure control func-
tion. The setpoint value is compared with the actual value.
The digital switching output D3 becomes active as soon as the divergence is
£
0.5% FS and becomes inactive when the divergence
>
1% FS is exceeded.
Graph for VPPM-...-...P switching variant
1
2
3
4
Fig. 6: Switching variant VPPM-...-...P
1
Setpoint value
2
Actual value
3
Upper tolerance limit
4
Lower tolerance limit
Graph for VPPM-...-...N switching variant
1
2
3
4
Fig. 7: Switching variant VPPM-...-...N
1
Setpoint value
2
Actual value
3
Upper tolerance limit
4
Lower tolerance limit
Circuit diagram VPPM-...-...P
Circuit diagram VPPM-...-...N
Tab. 4: VPPM-... circuit diagrams Switching output
8
Commissioning
• Keep high-frequency radiation away from the VPPM-... in order to avoid
increased tolerances of the outlet pressure.
• The VPPM-... interprets setpoint signals that are less than 1% Full Scale (FS) as
0 V or 4 mA. In this case the working pressure is set to ambient pressure.
• At typical input values below 3.6 mA , the valve detects a cable break and the
last pressure set remains unregulated. Leakage results in a change of pressure
over the long term.
1. Connect the VPPM-... with a setpoint value signal. The VPPM-... has a differen-
tial input. Apply the setpoint signal 0 … 10 V or 4 … 20 mA to contacts 3 and 4.
Apply the lower potential to contact 3 and the higher potential to contact 4.
Contact 3 (– setpoint value) can be connected to contact 7 (GND).
2. Power the VPPM-... with direct current.
–
Supply voltage UV = 24 V DC ±10%
Select a parameter set for the regulator.
–
Press and hold the [Edit] key for 3 seconds.
–
Select a parameter set with the [UP] and [DOWN] keys. The LED of the
selected parameter set lights up.
–
Press the [Edit] key to confirm the selection.
The control response of the VPPM-... can also be set by remote control via
digital inputs D1 and D2.
Parameter set Control response
Input D1 (PIN
1)
Input D2 (PIN
5)
1
Fast control response
1 (24 V DC)
0 (0 V DC)
2
Factory setting: universal control
response
0
1
3
Precise control response
1
1
Tab. 5: Parameter sets
The following 3 tables show the recommended parameter sets for the different
pneumatic ports:
Parameter sets recommended for VPPM-6...
Tube length
1)
Open system
Output volume in ml
0 … 100
100 … 1000
>
1000
0 m
3
3
2
1
1 m
3
3
2
2
3 m
3
3
3
2
³
5 m
3
3
3
2
1) with inner tubing diameter 6 mm or 8 mm
Tab. 6: Parameter sets recommended for VPPM-6...
Parameter sets recommended for VPPM-8...
Tube length
1)
Open system
Output volume in ml
0 … 500
500 … 2000
>
2000
0 m
3
1
2
3
1 m
3
1
2
3
3 m
3
2
3
3
³
5 m
3
3
3
3
1) with tubing diameter 8 mm or 10 mm
Tab. 7: Parameter sets recommended for VPPM-8...
Parameter sets recommended for VPPM-12L-...
Tube length
1)
Open system
Output volume in ml
0 … 2000
2000 … 10000
>
10000
0 m
3
1
2
3
1 m
3
1
2
3
3 m
3
2
3
3
³
5 m
3
3
3
3
1) with tubing diameter 12 mm or 16 mm
Tab. 8: Parameter sets recommended for VPPM-12L-...
9
Maintenance
9.1
Disassembly
NOTICE
• When switching off the VPPM.-..., first make sure that the setpoint value is set
to 0, then that the supply pressure and finally the supply voltage are switched
off.
Switch off the following energy sources:
–
Operating voltage
–
Compressed air
2. Disconnect the connections from the device.
3. Remove the device from the mounting surface or H-rail.
9.2
Cleaning
Switch off the following energy sources to clean the outside:
–
Operating voltage
–
Compressed air
2. Clean the device on the outside with a soft cloth as required.
