Is it possible to set the two low limit alarms in RTC 48 relay.

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Yes, it is possible to set the alarm at low limit settings by using the Alarm property "Energise/De-energise", means what type of action do we want to do like Alarm ON or Alarm OFF when Process Value crosses the Set Point limit. Similarly this can be done for the two alarms also but this depends on the RTC48 Model whether it has single or double alarms output. The alarm setting details with instruction sheet for RTC 48 relay is attached herewith.