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47LLC OPERATING MANUAL EM-9505-B Rev.4
1.6.4 WIRING INPUT sIGNAL
Connect (a) strain gauge(s) to measure.
Excitation
2.5 V, 5 V, 7.5 V or 10 V
Maximum current
120 mA
Load resistance
≥ 85 Ω
IMPORTANT
•
For 4-wire strain gauges. The 47LLC does not have a remote sensing function.
•
Be sure to confirm the polarity of the input and excitation voltage in wiring.
•
Use excitation voltage of the unit to apply to a strain gauge.
•
Using recommended excitation voltage or lower voltage is recommended.
•
Maximum 4 strain gauges with output resistance 350 Ω are connectable.
•
Do not connect other devices to a strain gauge.
•
The input signal is a minute voltage. Connect a shielded wire to the terminal SG and ground. Ground the input shield
to the most stable earth to prevent noise troubles.
•
Do not connect anything to unused terminals.
Strain gauge input
EXC+
EXC-
INP+
INP-
SG
1
2
3
5
4
Ground
(resistance
100 ohms or less)