Gefran VDA-I Data Sheet

VDA-I

VARIABLE DIGITAL INLINE AMPLIFIER

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)

The variable digital inline amplier VDA-I converts the signal from strain sensors and load cells into a current or voltage
output signal. The VDA-I amplier 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 amplier generates a reset signal when power is applied to device.

Operate

t

Minimum reset pulse duration >25ms

Reset 12...36V

Operate 0V / open