This document discusses relay logic and hardwired control systems used in industrial automation. Relay logic relies on electrical relays and hardwired connections to perform control functions and sequence operations. These early automation systems provided rudimentary process control by closing and opening electrical contacts to manage flows of electricity through a network of relays.

1. Relay logic and hardwired controlRelay logic and hardwired controlRelay logic and h

2. Relay logic and hardwired controlRelay logic and hardwired controlRelay logic and h

3. Relay logic and hardwired controlRelay logic and hardwired control

5. • Relay logic and hardwired controlRelay logic and hardwired
controlRelay logic and hardwired control

6. Relay logic and hardwired controlRelay logic and hardwired controlRelay logic and h

7. Relay logic and hardwired controlRelay logic and hardwired controlRelay logic and h

8. Relay logic and hardwired controlRelay logic and hardwired control