5.2.2
Product variants
Characteristic
Type code
Description
Basic function
VEAB
Piezo proportional-pressure
regulator
L
In-line valve
Valve type
B
Sub-base valve
Valve function
26
2x 3/2-way valve, normally
closed
D2
0 … 2 bar
D7
0 … 1 bar
D9
0 … 6 bar
D12
0 … 0.2 bar
D13
–1 … 1 bar
D14
–1 … 0 bar
D15
–0.5 … 0.5 bar
Pressure range
D18
–1 … 5 bar
F
Flange/sub-base
Pneumatic connection
Q4
Push-in connector 4 mm
V1
Voltage variant 0 … 10 V
Setpoint value input and actual
value output
A4
Current variant 4 … 20 mA
Nominal operating voltage
1
24 V DC
Electrical connection
R1
Plug M8, 4-pin
Tab. 2 Product variants
6
Transport and storage
–
Store the product in a dry, UV- and corrosion-protected environment.
–
Ensure short storage times.
7
Mechanical installation
1. Make sure there is sufficient space for the connecting cable and tubing con-
nections.
Ä
In this way you will prevent the connecting lines and the tubes from kink-
ing.
2. Place the valve as close to the consumer as possible.
Ä
This leads to improved control precision and shorter response times.
Mounting options of the valve:
–
Through-hold mounting of the in-line valve through 3 lateral through-holes
–
Mounting of the in-line valve to H-rails using H-rail mounting VAME-P7-T
è
1 Further applicable documents
–
Mounting of the in-line valve to the mounting plate VAME-P7-Y
è
1 Further applicable documents
–
Mounting of the sub-base valve using 2 through holes using the sub-base
VABM-....
è
1 Further applicable documents
8
Installation
8.1
Pneumatic installation (in-line valve)
Valves for standard operation (overpressure)
1. Attach tubing to the following connections:
–
Compressed air connection (1)
è
Fig.3
–
Air connection (2)
è
Fig.2
2. Mount a silencer to the exhaust port (3) or remove the exhaust air with ducts
è
Fig.3.
Valves for vacuum operation (reversible operation)
1. Attach tubing to the following connections:
–
Vacuum connection (3)
è
Fig.3
–
Air connection (2)
è
Fig.2
2. Mount silencer to the compressed air connection (1), to protect the valve from
coarse dirt particles
è
Fig.2.
Operating medium
NOTICE!
Pay attention to compressed air quality.
Damage to property or loss of function from lubricated compressed air.
•
Operate product only with unlubricated compressed air.
•
Observe the requirements for compressed air quality
è
Technical data.
8.2
Electrical installation
WARNING!
Risk of injury due to electric shock.
•
For the electric power supply, use only PELV circuits that ensure a reliable
electric disconnection from the mains network.
•
Observe IEC 60204-1/EN 60204-1.
1. If a screened cable is used: earth the shield at the cable end farther away
from the valve.
2. Install electrical connecting cable without squeezing, kinking or stretching.
3. Screw electrical connecting cable onto the M8 plug connector. Tightening
torque maximum 0.3 Nm
Connection
Pin
Allocation
Wire colour
1)
(NEBU-M8...)
1
+ 24 V DC
BN
2
Setpoint value (+)
WH
3
GND
BU
4
Actual value (+)
BK
1) in accordance with IEC 757
Tab. 3 Pin allocation for plug M8, 4-pin
9
Commissioning
1. Check the operating conditions and limit values
è
Technical data.
2. Switch on compressed air supply.
3. Check pneumatic connection points for tightness.
4. Connect valve to a setpoint signal.
5. Switch on operating voltage.
10
Cleaning
1. Switch off the following energy sources to clean the outside:
–
Compressed air
–
Operating voltage
2. Clean the outside of the product with a soft cloth. Do not use aggressive
cleaning agents.
11
Malfunctions
11.1
Diagnostics
LED
indicator
Status and meaning
LED illuminates green:
–
Operating voltage is present and within the permissible range.
–
No error is present.
–
Setpoint signal lies in the permissible range (0 … 10.8 V or 2.5 … 20.5 mA).
LED flashes red:
–
Operating voltage lies above the permissible range (
>
29 V).
LED flashes alternately red and green:
–
Setpoint signal lies above the permissible range (
>
10.8 V or
>
20.5 mA).
–
Setpoint signal lies below the permissible range (
<
2.5 mA).
LED is off:
–
No operating voltage applied.
–
Operating voltage lies below the permissible range (
<
19 V).
Tab. 4 LED
11.2
Fault clearance
Fault description
Cause
Remedy
Operating voltage not applied
Check operating voltage con-
nection.
No setpoint voltage
Check controller and connec-
tion.
Valve does not react.
Compressed air supply not
present/insufficient
Check compressed air supply.
Flow rate is too low.
Restriction of the flow cross
section due to connection tech-
nology (swivel fittings).
Use alternative connection
technology.
Pressure remains constant des-
pite modified setpoint specific-
ation.
Supply cable breakage; the last
outlet pressure set is main-
tained but not regulated. Slow
pressure drop due to leakage.
Replace supply cable.
Setpoint value is not reached.
Inlet pressure p1 is too low.
Increase inlet pressure p1.
Maintain permissible maximum
operating pressure
è
14 Technical data.
Tab. 5
12
Dismounting
1. Switch off setpoint voltage.
2. Switch off operating voltage.
3. Switch off compressed air supply.
4. Remove electrical connecting cables.
5. Remove compressed air lines.
6. Dismantle the product.
