Q: I have a question about the ECA-DIN Current and Voltage Alarm with the DH1L1 (Dual, High/Low, Failsafe) output option. The literature for the product says that "the failsafe relays are de-energized in an alarm condition or during power loss to the unit." Is this statement also true if there is a loss of input signal such as a broken wire?

A: The Failsafe setting means that the relay coils are de-energized in the alarm state. Naturally, if power is lost they will be de-energized. In case of loss of signal, the ECA will perceive the condition as a low signal and behave accordingly. That is, if you have a low alarm setting, the alarm will be activated. If you have a high alarm set, it will not be activated.
If you need more functionality such as being able to discern between a low signal and a lost signal, we recommend the SPA2. Unlike the ECA, it is a microprocessor-based design. This means that it can be configured for a variety of alarm and input signal conditions.

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