Connecting Analog Strain Gage Sensors - HBM WTX120 Bedienungsanleitung

4.5

Connecting analog strain gage sensors

The WTX120 permits the connection of analog strain gage sensors with the
following specifications:
S Maximum of eight strain gage load cells with 350 Ω each
S Load cell impedance range 43 Ω ... 3321 Ω
S Resolution subject to weights and measures legislation 10,000e, internal
524,000d
S Smallest permissible input signal for applications subject to weights and
measures legislation: 0.33 μV/e
S Adjustable sample rate 50-800 measurements/second
S Supply voltage for load cells: 5 V ±5% (clocked)
KL1 6 wires
1 –EXC
2 –SEN
3 –SIG
4 +SIG
5 +SEN
6 +EXC
7 SHLD
Tab. 4.1 Connection of an analog load cell in 6-wire configuration to the WTX120
Tip
When connecting multiple load cells use a suitable terminal box, such as types
VKK1-4 or VKK2-8 from HBM, to connect the load cells.
To operate load cells without sense wires (4-wire mode), jumpers must be
fitted on terminal KL1 between pins 1 and 2, and 5 and 6.
WTX120
–Excitation
–Sense
–Signal
+Signal
+Sense
+Excitation
SHIELD
A04500_02_Y00_00 HBM: public
Installation
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