plc relay output circuit

Relay Symbols

Relay circuits

Relays may be connected together to perform logic and control functions, acting as logic elements much like digital gates (AND, OR, etc.).

Transistor Output Wiring

PLC Output Types

PLC outputs are of two types: 1. Relay. 2. Solid state. Relay outputs are mechanical contacts and Solid State outputs are like transistor, TRIAC.