Input Output Module works

plc digital output (hereinafter referred to as modules), for switching bus system fire radio systems and fire radio broadcasts normally between. Output module is embedded microprocessor, microprocessor and fire alarm controller communications, power bus brownout detect, input and output line fault detection, output control, digital input module signal logic state judge, the status indicator control. Module after receiving the fire alarm control start command, pull the relay, the scene shifted from the normal speakers to fire radio broadcasts, and light indicator, while the answer signal information to the fire alarm controller, indicating that the switch was successful