Reference: A938
Index: B
Page 22
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Instruction Manual – NPS914 Alarm and Indication IED
I/O
Figure. 3.4. - 19. I/O section.
The "I/O" section is divided into two subsections: "Direct output control" and "Blocking input control".
In "Direct output control" you can connect the stage's signals to physical outputs, either to an output relay or
an LED (START or TRIP LEDs or one of the 16 user configurable LEDs). If the stage is blocked internally (DI
or another signal), you can configure an output to indicate the stage that is blocked. A connection to an output
can be either latched ("|x|") or non-latched ("x").
"Blocking input control" allows you to block stages. The blocking can be done by using any of the following:
• digital inputs
• logical inputs or outputs
• the START, TRIP or BLOCKED information of another protection stage
• object status information.
