VDA-I
VARIABLE DIGITAL INLINE AMPLIFIER
Main features:
• Amplier with fast digital output
• For dynamic and static applications
• Very high strain gauge bridge offset range
• Compact solid aluminium housing (IP65)
The variable digital inline amplier VDA-I converts the signal from strain sensors and load cells into a current or voltage
output signal. The VDA-I amplier can be used in dynamic and static applications.
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
Case material Aluminum anodized
Reset time > 25 ms
Reset voltage 12…36 VDC,
Supply voltage 12…36 VDC
Power consumption 0.5 W 1W
Zero output signal 0 V (N) 4 mA (E)
Full scale output signal
Allowed load ≥5 kΩ 0..500 Ω
Operating temperature range -40…+85°C
Storage temperature range -40…+100°C
Temperature effects (zero) ± 0,01% FS/°C
Temperature effects (span) ± 0,01% FS/°C
Weight ~150 g
Protection class IP65
Output short circuit protection Yes
Reverse polarity protection Yes
Dielectric strenght (2) 250V
EC Conformity According to Directive 2014/30/EU
+ 10 V (N) stretching 20 mA (E) stretching
- 10 V (N) compression -
(1) incl. Non-linearity, Hysteresis, Repeatability, Zero-offset and Span-offset
(2) Uses 50V 2J Voltage suppressor
DIMENSION
VDA-I
124
7
7
110
Dimensions in mm
RESET FUNCTION
24V - TYPE
V
24V
Reset control input
0V
Operate > 25ms
Reset
With the power-on reset function the amplier generates a reset signal when power is applied to device.
Operate
t
Minimum reset pulse duration >25ms
Reset 12...36V
Operate 0V / open
ELECTRICAL CONNECTION SENSOR SIDE
Sensor 2/4 bridge M16 6-pin
Sensor 4/4 bridge M16 6-pin
Strain gauge 1
Strain gauge 2
Strain gauge 1
Strain gauge 2
Excitation +
Signal +
Signal -
Excitation -
Connector
PIN
3
2
1
4
6
5
1 Strain gauge 1
2 Strain gauge 1
3 n.a.
4 Strain gauge 2
5 Strain gauge 2
6 n.a.
Connector
PIN
3
2
1
4
6
5
1 Excitation +
2 Excitation +
3 Excitation -
4 Signal +
5 Signal -
6 Excitation -
Function
Function
ELECTRICAL CONNECTION CONTROLLER SIDE
Controller M12 5-pin
4
1
Stretching (positive strain) gives positives signal.
Compression (negative strain) gives negative signal.
Connector
PIN
3
5
2
1 Power 12...36VDC
2 Signal -
3 Power GND
4 Signal +
5 Reset
Function
ORDER CODE
Variable digital
inline amplier
Electrical connection
sensor side
M16 6-pin H
Electrical connection
controller side
M12 5-pin A
Output signal
4…20 mA E
0…±10 VDC N
Bridge
4/4 bridge 4
2/4 bridge (350 Ω) 2
Output range of used sensor
2/4 bridge version
4/4 bridge version
VDA-I
250 µε 0250
500 µε 0500
1000 µε 1000
0,5 mV/V 0500
1,0 mV/V 1000
2,0 mV/V 2000
3,0 mV/V 3000
- - - - - - 0 0
Reset type
External high-reset (24V), without power-on reset, zero stored (2·10^6 reset cycles allowed) HO11
External high-reset (24V), with power-on reset (innite reset cycles allowed) HR11
Peak feature
no peak-hold O
Example: VDA-I - H - A - E - 2 - 1000 - 00 - HR11 - O
Variable digital inline amplier, Electrical connection sensor side = M16 6-pin half bridge,
Electrical connection controller side = M12 5-pin, Output signal = 4...20mA, Bridge = 2/4 (half bridge),
Output range of used sensor = 1000µε, Reset type = external high-reset 24V with power-on reset, no peak-hold
ACCESSORIES
Description Code
2 m CAV011
Cable with female connector M12 5-pin
Female connector M12 5-pin TE-E-0103_00
GEFRAN spa reserves the right to make any kind of design or functional modication at any moment without prior notice.
5 m CAV012
10 m CAV013
15 m CAV015
DTS_VDA-I_11-2017_ENG
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