VDA168-H
VARIABLE DIGITAL AMPLIFIER 168
Main features
• Dynamic and static applications
• Used for any kind of strain gage sensors
• Digital amplified output from 0...±10VDC
• High resolutions (24-Bit ADC, 16-Bit DAC)
• Quick plug-in sensor and measure
• Fast and easy self-calibration
• Very rugged aluminium housing (IP62)
This digital amplifier measures at the strain gage bridge
eight times per millisecond which gives a high oversampling range.
This gives a stable signal output with high accuracy and
reproducibility. The digitalised signal can be trensformed
into various outputs
TECHNICAL DATA
Input Bridge resistance 120...1000Ω
Signal input range (FS) 0.1...3mV/V
Span adjustment ±200% FS
Zero adjustment ±500% FS
Resolution ADC 24-Bit
Resolution DAC 16-Bit
Sampling rate 8kHz
Output rate 800Hz
Low-pass lter 100Hz
Output signal 0...±10VDC, 4...20mA
Noise < 10mV
Accuracy < ± 0.2% FS
Accuracy of zero point < ± 0.1% FS
Linearity < ± 0.02% FS
Output resistance 10Ω
Reset time > 25ms
Reset voltage 15...28VDC, 0VDC
Supply voltage 20...28VDC
Supply current < 60mA
Inverse polarity protection Yes
Accidental short-circuit protection Yes
Operating temperatur range -10...+70°C
Storage temperatur range -10...+70°C
Temperature coefcient at 10°C < 0.1 (0.05 typical)
Protection class IP62
EMC 2014/30/EU
Case material Aluminium
Weight 260g
MECHANICAL DIMENSIONS
RESET FUNCTIONS
24V -TYPE
0V - TYPE
Reset control input
Minimum reset pulse duration >25ms
Reset 15...28 V
Operate 0V/open
Reset control input
Minimum reset pulse duration >25ms
Reset 0V
Operate 5...28V/open
ELECTRICAL CONNECTIONS
SENSOR:
half bridge
full bridge
CONTROLLER
ORDER CODE
DIGITAL STRAIN-GAUGE
AMPLIFIER VDA168 - H
- -
-
Output range of used sensor
Full bridge
version
2/4 bridge
version
dene your range
με up to 1000 με;
(100
0.5 mV/V up to 3 mV/V)
Full Bridge 4
2/4 bridge 2
0.5 mV/V 0005
1.0 mV/V 0010
2.0 mV/V 0020
με
500
με
1000
Bridge
0500
1000
XXX
Feature
N peak-hold negative
P peak-hold positive
Output 4mA..20mA
I
(instead of 0...±10V)
With EEPROM function
E
(only for DLC)
O no features
Reset
HO
HR
LO
External reset (24V), without
power-on reset
(5‧10˄5 reset cycles allowed)
External reset (24V), with power-
on reset (innite reset cycles
allowed)
External reset (0V), without
power-on reset
(5‧10˄5 reset cycles allowed)
External reset (0V), with power-
LR
on reset (innite reset cycles
allowed)
ST Static (no external reset)
Example: VDA168 - H - 0020 - 4 - HR - P
is a VDA168-H2 strain-gauge amplifier for four strain gauges, with an output signal of 0...10V(with sensitivity sensor
2mV/V), with a 3m cable, with power-on reset and with peak-hold positive.
GEFRAN spa reserves the right to make any kind of design or functional modification at any moment without prior notice.
DTS_VDA168-H_04-2016_ENG
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