What you'll learn
Terminate a six-wire strain-gauge load cell on a weighing transmitter, including excitation, millivolt signal, sense conductors and shield. Send the transmitter’s conditioned 4–20 mA output to a PLC analog input.
Lab time: ~22 minutes.
Lesson briefing
Six-Wire Load Cell and Transmitter
Terminate a six-wire strain-gauge load cell on a weighing transmitter, including excitation, millivolt signal, sense conductors and shield. Send the transmitter’s conditioned 4–20 mA output to a PLC analog input.
Why it is wired this way
Remote-sense wires let the transmitter compensate excitation voltage drop along the cable. The SIG pair carries only millivolts and is highly noise-sensitive. The shield is bonded at one end and must not carry operating current.
Commissioning standard
Before energising, prove protective earth and continuity, verify the drawing terminal-by-terminal, then energise through the protective device and measure the expected supply, signal and return values. Never use this training panel as a substitute for the machine manufacturer’s instructions, risk assessment, isolation procedure or applicable electrical standard.
Hints
Match EXC+, EXC−, SIG+, SIG− and both SENSE conductors one-for-one.
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This lesson uses 6 placed components on the lab canvas. Components are vendor-neutral (no proprietary trademarks); the wiring rules apply to any equivalent industrial part.
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