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VAU4/3

Output voltage, External ventilator supply

[V]

3 AC mains voltage

Fuse, external ventilator supply (optional)

surge-proof 500 mA (T)

Maximum switch-on frequency per hour

12

Digital inputs

Signal level, high status

Signal level, low status

12 V – 30 V
0 V – 5 V

Analogue inputs, Transduction accuracy

10 bit

Analogue outputs 

maximum ampacity as current output

maximum apparent ohmic resistance 
as current output

10 mA
1 kOhm

24 V DC fixed voltage output

maximum ampacity

70 mA

10 V DC fixed voltage output

maximum ampacity

30 mA

Potential-free contacts, max. load

230 V/2 A

Ventilation

air cooled by motor ventilator

Ambient temperature during operation

°C

0 – 50

Storage temperature

°C

-20 … 70

Maximum humidity

90% without condensation

Maximum installation altitude

Up to 1000 m above sea level without 
loss of performance

Weight

[kg]

5.6

Type of protection

IP 55

Maximum cross-section power supply

mm

2

2.5

Maximum cross-section pilot wires

mm

2

1.5

Maximum connection cross-section 
external ventilator

mm

2

2,5

Terminal range, power cable:

mm

7.0 … 13, width across flats 25

Terminal range, pilot wires:

mm

4.5 … 9.0, width across flats 20

Certifications

European EMC guidelines

If the VAU4/3 frequency converter is installed and operated according to the recommendations 

of these operating instructions, it fulfils all requirements of the EMC regulations according to 

the EMC product standards for motor driven systems EN 61800-3. 

UR certification 

(Use in North America)

“Suitable for use on a circuit capable of delivering not more than 5000 rms sym-
metrical amperes, 380…480Volts (three phase)” and “when protected by J class 
fuses.” as indicated.“

The VAU4/3 frequency converter is equipped with a motor overload protector. 

Summary of Contents for VariAir VAU4/3

Page 1: ...www becker international com 1 28100241101 11 12 operating instructions Frequency converter vAU4 3 QUICK START GUIDE ...

Page 2: ...ns The latter should be read thoroughly before initial start up The quick start guide contains safety instructions and helps the user to put the basic model of the VAU 4 3 into operation and to operate it with the default settings Intended use i Frequency converters are components that are intended for installation into electrical systems or machines When being installed into machines the commissi...

Page 3: ...r devices that are es pecially sensitive to static electricity Therefore please avoid touching the circuit boards or components with your hands or with metallic objects Only the screws of the terminal strips may be touched by insulated screwdrivers when wires are connected The frequency converter is intended for permanent connection only and may not be operated without an effective earth connectio...

Page 4: ...y charged parts and line connections must not be touched directly after frequency converters are disconnected from the supply voltage as the capacitors may be charged Observe the corresponding signs about this on the frequency converters During operation all covers must be kept closed The frequency converter is maintenance free under normal operating conditions If the air is dusty the cooling surf...

Page 5: ...Rel 2 Terminal Connection L1 L2 L3 Mains feeder phase L1 L2 L3 PE Mains feeder earth line PE U V W Connection strands motor winding U V W X Y Z Feeder phase external ventilator phase L1 L2 L3 optional Connection terminals of the bottom row of the double decker terminal block Terminal Connection 1 24 V SELV 1 24 V DC fixed voltage output 2 Digital 1 Digital input 1 Digital 2 Digital input 2 Digital...

Page 6: ... switch block 1 with 4 switches Setting Function DIP switch 1 OFF Speed set operation ON Controlled operation DIP switch 2 OFF No control via RS485 field bus interface ON Control via RS485 field bus interface DIP switch 3 OFF No analogue control ON Analogue control DIP switch 4 OFF Pressure mode ON Vacuum mode DIP switch block 2 with 2 switches DIP switch 1 DIP switch 2 Analogue input 1 OFF OFF 0 ...

Page 7: ...with the continuously lit red LED Table of possible error messages Display Malfunction Short circuit Overvoltage Intermediate circuit Undervoltage Intermediate circuit Overtemperature motor Mains interruption Offset current sensor Overtemperature Power output stage Overcurrent Inner temperature too high Charge relay defective I2 t limitation Earth fault Feldbus timeout IO controller defective RS48...

Page 8: ...m installation altitude Up to 1000 m above sea level without loss of performance Weight kg 5 6 Type of protection IP 55 Maximum cross section power supply mm2 2 5 Maximum cross section pilot wires mm2 1 5 Maximum connection cross section external ventilator mm2 2 5 Terminal range power cable mm 7 0 13 width across flats 25 Terminal range pilot wires mm 4 5 9 0 width across flats 20 Certifications ...

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