Power Connection; Figure 2.9: Pin Assignment Of The Power Connector - Advantech EKI-2525M User Manual

2.5 Power Connection

The EKI-2525M/2526M supports dual +12 ~ 48 V power inputs and power-fail relay
DC
output.

Figure 2.9: Pin Assignment of the Power Connector

You can connect an alarm indicator, buzzer or other signaling equipment through the
relay output. The relay opens if power input 1 or 2 fails ( "Open" means if you connect
relay output with an LED, the light would be off).
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