to prevent damage to the relay due to changes in earth potential.
Other considerations: When connecting RTD sensors, all RTDs must be of the same type,
and the connecting wires should be shielded three-wire cables of the same length with resistance not exceeding the specified value,
avoiding parallel laying with high-current wires. If RTD #8 (RTD #10 for 169 Plus) is used to monitor ambient temperature,
it needs to be properly selected and installed. Programming access terminals should be disconnected after programming is complete
or safety measures should be taken to prevent inadvertent change of setpoints.
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