Summing Amplifier for Resistance Strain Gauges

Summing Amplifier for Resistance Strain Gauges
Summing Amplifier
for Resistance Strain Gauges
in robust field case
for all weighing applications
Characteristics
•
4 inputs for resistance strain gauge
full-bridges
•
Addition of single measure values
•
1 output for connection to every
measuring amplifier with input for
resistance strain gauge bridges
•
Cascading of several
summing amplifiers is possible
•
No external power supply necessary*
*if the measuring amplifier´s sensor supply is powerful enough
For generating the desired summing signal from these single signals
that can be lead to a measuring amplifier, the 4-input summing
amplifier for resistance strain gauges can be used.
.
2 to 4 measuring bridges can be connected. The output delivers the
summing signal which behaves like a single resistance strain gauge
bridge and can be evaluated with every measuring amplifier with
resistance strain gauge-input like DLM-HD, ALM, ALM-HD etc.
When the internal bridge supply of the measuring amplifier is used,
you have to take into account the maximum load because the
current consumptions of every single bridge are added. If necessary,
an external power supply can be used. When the summing signal is
built by more than four sensors, the summing amplifiers can be
cascaded to an unlimited number.
.
105 mm
60 mm
Numerous measuring devices in weigh technics require the
evaluation of more than one measuring point (i.e. containers with
three or four feet, weighing plates etc.).
.
80 mm
Description
40 mm
140 mm
20
60 mm
160 mm
DSV1E.CDR
Technical Data
Input
Sensor input:
4 x resistance strain gauge full-bridge
Adjustment:
not requisite
Outputs
Sensor output:
1 x resistance strain gauge full-bridge
Power Supply
Supply voltage:
none
external power supply unit
for bridge supply can be
connected on demand
Ambient Conditions
Operating temperature range:
-20°C ... 60°C
Storage temperature range:
-20°C ... 70°C
Case:
160 x 80 x 60 mm
Fixing:
inner mounting holes in screw channels
Material of case:
aluminium pressure diecasting
Colour:
Bottom part: RAL 7035 light grey
Lid: RAL 7040 window grey
Degree of protection:
IP 65
Weight:
approx. 0,75 kg
Terminals:
plug-in screw terminals in the case for wires
up to 2,5 mm2 through 5 x Pg9 screwing,
MS nickel plated
Dimensions
DSV2E.CDR
Operating, adjustment instructions
1 2 3 4 5
- + - +
Supply
Signal
Summing signal
6 7 8 9 10 11 12 13 14 15
- + - +
Supply
- + - +
Signal Supply
DMS1
Signal
DMS2
16 17 18 19 20 21 22 23 24 25
- + - +
Supply
- + - +
Signal Supply
DMS3
Signal
DMS4
Installation, connections
1. Connect the 5-terminal block to the measuring amplifier.
The amplifier evaluates the summing signal.
2. The supply voltage is connected to the "supply"-terminals (2(-), 3(+))
when all provided sensors are supplied parallel. The measuring amplifier
must have a powerful sensor supply. Otherwise, an external power supply
unit has to be used.
3. The terminals "Signal" (4(-), 5(+)) are connected to the input
of the measuring amplifier. If a shielded cable is used, the shield can be
connected to the terminal "Ground symbol".
4. Two 10-terminal blocks are provided for the connection
of two resistance strain gauge sensors each.
5. The sensor supply wires are connected to the terminals "Supply".
6. The sensor output signals are connected to the terminals "Signal".
7. Existing shields can be connected to the terminal "Ground Symbol".
DSV3E.CDR
Ordering key
D
V
X
X
X
X
X
X
XXX
No.
Sensor
Input
Sensor
Output
Connection
Measuring
range
0
4 x resistance
strain gauge
full-bridge
1 x resistance
strain gauge
full-bridge
Pg9-screwing
none
DSV4E.CDR
Änderungen vorbehalten, Stand 02/00
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