Dry Node Definition: A dry node is a passive switch with two states: open and closed. There is no polarity between the two nodes, and they are interchangeable. Examples include buttons, rotary switches, relay outputs, etc.
Wet Node Definition: A wet node is an active switch with two states: energized and de-energized. The polarity between the two contacts is reversible. A wet node can be understood as a signal with a voltage difference, usually with polarity and not interchangeable.
Agnes Wang is an IoT Solutions Specialist at IOTRouter, focusing on industrial IoT gateways, edge computing, and industrial automation solutions.
She specializes in industrial communication technologies, including Modbus, IEC 60870-5-104, MQTT, OPC UA, PLC integration, and remote monitoring applications. She contributes to technical articles and application guides covering industrial IoT solutions, protocol conversion, and edge computing.
