Omron E5CN-HT User Manual page 53

Section 2-2
Wiring Terminals
Note Wire all voltage input terminals correctly. The Digital Controller may
fail if the voltage input terminals are wired incorrectly.
Control outputs that are voltage outputs are not isolated from the internal circuits.
When using a grounded thermocouple, do not connect any of the control output ter-
minals to ground. (If both are grounded, measurements will be unreliable due to
sneak current.)
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