gefran VDA-I User manual

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

80537_MAN_VDA-I_10-2017_ENG 1
Device data ...................................................................................................................................................................................................2
Warnings and safety ....................................................................................................................................................................................2
Disposal2
Disclaimer .....................................................................................................................................................................................................2
Copyright ......................................................................................................................................................................................................2
1. GENERAL DESCRIPTION ............................................................................................................................ 3
1.1. Prole ..................................................................................................................................................................................................3
1.2. VDA-I ...................................................................................................................................................................................................4
1.3. Dimensions.........................................................................................................................................................................................4
2. INSTALLATION ............................................................................................................................................. 5
2.1. Mountingtheamplier.......................................................................................................................................................................5
2.1.1. General installation rules ..........................................................................................................................................................5
2.1.1.1. Protectionagainstinltration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 connections...................................................................................................................................................5
2.3. Electrical connection sensor side ...................................................................................................................................................6
2.4. Electrical connection controller side ...............................................................................................................................................6
3. OPERATION .................................................................................................................................................. 7
3.1. Power-on.............................................................................................................................................................................................7
3.2. Reset ...................................................................................................................................................................................................7
4. TECHNICAL DATA........................................................................................................................................ 8
4.1. VDA-I ...................................................................................................................................................................................................8
5. ORDER CODES............................................................................................................................................. 9
5.1. VDA-I ...................................................................................................................................................................................................9
5.2. Accessories ........................................................................................................................................................................................9
INDEX

80537_MAN_VDA-I_10-2017_ENG2
INTRODUCTION
Device data
In the space below, write the order code and other plate data
shown on the label attached to the outside of the amplier
(see gure).
If you need technical assistance, this information must be gi-
ven to Gefran Customer Service.
VDA-I
Serial No.
Order code
Warnings and safety
Make sure that you always have the latest version of this ma-
nual, downloadable at no cost from Gefran’s website (www.
gefran.com).
The devices described in this manual must be installed by
trained personnel in conformity to current laws and regula-
tions, following all of the instructions in this manual.
Installers and/or maintenance personnel MUST read this ma-
nual and scrupulously follow all of the instructions contained
herein and in the attachments.
Gefran will not be liable for any damage/harm caused to per-
sons and/or property, or to the device itself, if all of such inst-
ructions are not followed.
INTRODUCTION
Disposal
The amplier VDA-I must be disposed of in conformity to current laws and regulations.
If not correctly disposed of, some of the components used in the devices may harm the environment.
Disclaimer
Although all of the information in this manual has been care-
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. also reserves the right to change the contents
and form of this manual, as well as the characteristics of the
devices described herein, at any time and without notice. The
technical data and performance levels specied in this ma-
nual are to be considered a guide for the user in order to
determine the device’s suitability for a dened use, and do not
constitute a guarantee.
They may be the result of test conditions at Gefran S.p.A.,
and the user must compare them to his/her real application
requirements.
Under no circumstances will Gefran S.p.A. be liable for any
damage to property and/or harm to individuals due to tampe-
ring, incorrect or improper use, or use not conforming to the
characteristics of the amplier to the instructions contained in
this manual.
Copyright
This manual and its attachments may be freely reproduced
provided its contents are not changed in any way and provi-
ded every copy includes the above Disclaimer and the state-
ment of ownership of Gefran S.p.A.
Gefran and Sensormate are registered trademarks of Gefran
S.p.A.
This manual may make reference to or reproduce trademarks
and logos of third parties. Gefran S.p.A. acknowledges such
parties’ ownership of these trademarks and logos.

80537_MAN_VDA-I_10-2017_ENG 3
1. GENERAL DESCRIPTION
1. GENERAL DESCRIPTION
The variable digital inline amplier VDA-I converts the signal from strain sensors and load cells into a voltage or current output
signal. The VDA-I amplier can be used in dynamic and static applications.
1.1. Function
Systemoverview
max 15m
sensor
controller
VDA-I
machine

80537_MAN_VDA-I_10-2017_ENG4
1. GENERAL DESCRIPTION
1.2. VDA-I
Main features:
• Amplier with fast digital output
• For dynamic and static applications
• Very high strain gauge bridge offset range
• Compact solid aluminium housing (IP65)
1.3. Dimensions
VDA-I
Dimensions in mm
110
124
7
7

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 amplier 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 conguration 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
conguration) is not satised, interrupt the installation and contact your Gefran dealer or Gefran Customer
Service.
2.1. Mountingtheamplier
2.1.1. General installation rules
The amplier is designed for permanent indoor installation
2.1.1.1. Protectionagainstinltrationofdustand
water
The amplier 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 amplier to a sufciently rigid and robust support.
Use the four through holes on the amplier 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 (amplier 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 amplier must be a class 2 or
a current-limited low voltage source. The power supply
lines of the amplier must be laid separately from lines
for electromechanical power devices and main power
lines.
7. Make sure the ground connection is efcient. Absent or
inefcient 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 amplier cables and the power cables must not be
placed parallel to one another.
2. INSTALLATION

80537_MAN_VDA-I_10-2017_ENG6
2.3. Electrical connection sensor side
Strain gauge 1
Strain gauge 2
Strain gauge 1
Strain gauge 2
Connection
pin Function
1Strain gauge 1
2Strain gauge 1
3n.a.
4Strain gauge 2
5Strain 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 -
4Signal +
5Signal -
6Excitation -
Sensor 2/4 bridge M16 6-pin female
Sensor 4/4 bridge M16 6-pin female
2.4. Electrical connection controller side
Connector
pin Function
1Power 12...36VDC
2Signal -
3Power GND
4Signal +
5 Reset
Controller M12 5-pin male
2. INSTALLATION

80537_MAN_VDA-I_10-2017_ENG 7
3. OPERATION
3.1. Power-on
Power is supplied by the controller to which the amplier is
connected; therefore, the amplier is powered on and off
simultaneously with the controller.
3. OPERATION
3.2. Reset
The reset function is used to tare/zero the 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 signal up to 500%FS with the
amplier. If the signal is higher than 500%FS, it is not possib-
le to tare the signal anymore.
With the power-on reset function the amplier generates a
reset signal when power is applied to device.
10
0
15
28
V
Operative Reset
> 25 ms
Operative t
24

80537_MAN_VDA-I_10-2017_ENG8
4. TECHNICAL DATA
4. TECHNICAL DATA
4.1. VDA-I
TECHNICAL DATA
Output signal VOLTAGE CURRENT
Linearity < ± 0.02% FS
Zero accuracy < ± 0.1% FS
FS accuracy < ± 0.1% FS
Accuracy at room temperature (1) < ± 0.2% FS
Input bridge resistance 120…1000 Ω
Signal input range (FS) 0.1…3mV/V; 100µε…3000µε (with GF=2.00)
Output resolution 16-Bit
Sampling rate 5 kHz
Low-pass lter 1 kHz
Reset time > 25 ms
Reset voltage 12…36 VDC
Zero output signal 0 V (N) 4 mA (E)
Signal Output Full scale output signal + 10 V (N) stretching
- 10 V (N) compression
20 mA (E) stretching
-
Allowed load ≥5 kΩ0..500 Ω
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 Voltage suppressor
GENERAL DATA
POWER SUPPLY
Supply voltage 12…36 VDC
Power consumption 0.5 W 1W
Protections For Output short circuit
For Reverse polarity
Dielectric strenght (2) 250V
AMBIENT
CONDITIONS
Use Internal
Operating temperature range -40...+85 °C
Storage temperature -40...+100 °C
PROTECTION CLASS IP 65
ASSEMBLY Positioning No limitations
Fixing 4x M5 screws
CASE Material Aluminum anodized
Dimensions (L x H × P) 124 × 37 x 30 mm
WEIGHT ~ 0,150 kg
CE STANDARD EMC compliance
(compatibility electromagnetic) According to directive 2014/30/EU