On-off delay alarm

Does the subject want to ask "what is the on-off delay alarm"? Power failure alarm. Power-on delay refers to the delay action of time relay contact when the coil is powered on. Power failure alarm is also called remote power failure alarm. When the alarm detects a power outage, it sets the required delay time through the imported delay chip. After the power outage, the delay can be set to 0-999 minutes, and the alarm will be given after the power outage is delayed for n minutes. Send an alarm message through the network: call the police for power failure or restore power supply, and call the police five times in turn. The alarm receiver can judge the location and reason of the alarm according to the incoming number and the content of the short message, and can also remotely control the on-off of the field equipment by typing or sending short messages, which is suitable for monitoring the power supply situation of the field station and the station that cannot install a fixed alarm and is far away.