User manual
2.6  Wiring Power and P-Fail Contacts 
The EKI-2548I supports dual +12 ~ 48 V
DC
 and 24 V
AC
 power inputs, and P-Fail relay 
output. 
Terminal Block Front View for P-Fail Alarm 
Contacts 
P-Fail Alarm Application Example 
24Vdc, 1A 
Resistance 
Figure 2.6-1  Pin Assignments of the Terminal Block 
You can connect an alarm indicator, buzzer or other signaling equipment through the 
relay output. The relay opens if power input 1, 2 fails or port link down/break (″Open″ 
means if you connect relay output with an LED, the light would be off). 
17     Chapter2 










