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80537_MAN_VDA-I_10-2017_ENG

5

2.  INSTALLATION

Attention! 

The devices described in this manual must be installed by trained personnel in conformity to current laws and 

regulations, following all of the instructions in this manual.

Before installing, check that the amplifier is in perfect condition and was not damaged in shipment. Make sure 

that the package contains all of the accessories listed on the accompanying document, especially the gasket 

and the fastening brackets.

Check that the order code matches the configuration required for the intended application (supply voltage, 

number and type of inputs and outputs). 

Attention! 

If even one of the requirements mentioned above (trained technician in, device in perfect condition, correct 

configuration) is not satisfied, interrupt the installation and contact your Gefran dealer or Gefran Customer 

Service.

2.1. 

Mounting the amplifier

2.1.1.  General installation rules 

The amplifier is designed for permanent indoor installation

2.1.1.1. 

Protection against infiltration of dust and 

water

The amplifier has an IP65 protection index, so the device can 

be installed without problems in rooms that are very dusty or 

subject to splashing water

2.1.1.2.  Minimum space for ventilation

The  ambient  temperatur  must  not  exeed  +85°C  during 

 

operation.

2.1.2.  Positioning

Fasten the amplifier to a sufficiently rigid and robust support. 

Use the four through holes on the amplifier and M5 screws.

Advice. 

The lower the temperature in which the de-

vice works, the longer the life of its electronic 

components.

2.2.  Electrical connections

Attention! 

Failure to follow the instructions in this section may cause problems in electrical safety and electromagnetic 

compatibility, in addition to voiding the warranty.

2.2.1.  General rules for connections

1.  Connected external circuits must have double isolation.

2.  Use twisted and shielded cables for connections.

3.  The shield of the shielded cables must be grounded at a 

single point (amplifier connector side).

4.  Do not connect unused terminals.

5. 

Secure the cables so that mechanical forces are not 

exerted only on the connectors.

6.  The power supply of the amplifier must be a class 2 or 

a current-limited low voltage source. The power supply 

lines of the amplifier must be laid separately from lines 

for electromechanical power devices and main power 

lines.

7.  Make sure the ground connection is efficient. Absent or 

inefficient grounding can make the device unstable due 

to excessive noise.

8. 

To prevent noise, the sensors cables must be kept away 

from the power cables (high voltages or high currents).

9.  The amplifier cables and the power cables must not be 

placed parallel to one another.

2. INSTALLATION

Summary of Contents for 80537

Page 1: ...INSTRUCTION MANUAL Code 80537 VDA I VARIABLE DIGITAL INLINE AMPLIFIER 80537_MAN_VDA I_10 2017...

Page 2: ......

Page 3: ...neral installation rules 5 2 1 1 1 Protection against infiltration of dust and water 5 2 1 1 2 Minimum space for ventilation 5 2 1 2 Positioning 5 2 2 Electrical connections 5 2 2 1 General rules for...

Page 4: ...fully checked Gefran S p A assumes no liability regarding the presence of any errors or regarding damage to property and or harm to individuals due to any improper use of this manual Gefran S p A als...

Page 5: ...The variable digital inline amplifier VDA I converts the signal from strain sensors and load cells into a voltage or current output signal The VDA I amplifier can be used in dynamic and static applica...

Page 6: ...L DESCRIPTION 1 2 VDA I Main features Amplifier with fast digital output For dynamic and static applications Very high strain gauge bridge offset range Compact solid aluminium housing IP65 1 3 Dimensi...

Page 7: ...temperatur must not exeed 85 C during operation 2 1 2 Positioning Fasten the amplifier to a sufficiently rigid and robust support Use the four through holes on the amplifier and M5 screws Advice The...

Page 8: ...rain gauge 2 6 n a 6 1 2 3 4 5 Excitation Signal Signal Excitation 2 3 1 4 5 6 1 2 3 4 5 Connection pin Function 1 Excitation 2 Excitation 3 Excitation 4 Signal 5 Signal 6 Excitation Sensor 2 4 bridge...

Page 9: ...output signal To run a Reset supply voltage from 12 to 36 V for at least 25 ms there are no limits to longer durations to the Reset input of the function in question It s possible to tare an input si...

Page 10: ...E stretching Allowed load 5 k 0 500 Temperature effects zero 0 01 FS C Temperature effects span 0 01 FS C 1 incl Non linearity Hysteresis Repeatability Zero offset and Span offset 2 Uses 50V 2J Voltag...

Page 11: ...stored 2 10 6 reset cycles allowed HO11 External high reset 24V with power on reset infinite reset cycles allowed HR11 Peak feature no peak hold O 0 0 Order code VDA I Example VDA I H A N 2 1000 00 H...

Page 12: ...80537_MAN_VDA I_10 2017_ENG 10...

Page 13: ......

Page 14: ...GEFRAN Spa Via Sebina 74 25050 Provaglio d Iseo Bs Italien Tel 39 0309888 1 Fax 39 0309839063 info gefran com http www gefran com...

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