Using analog inputs for digital signals

[Charbel]

Dear,
I was looking at tender documents / drawings and this have indicated that they are using analog input for digital signals.
I was wondering maybe they are using it for line monitoring. Anythought on this?
thank you!

charbel

 

[rdrast]

Without any details, I can only say someone had either too much money, or too little sense.

 

[kvogel]

Some of the brick & micro PLCS (ABB, Idec) have a few analog inputs that can be configured to be used as digitals as needed. So it's maybe not that far fetched depending on the device. Specifically buying analog inputs to be used as digitals when you have a choice would be a waste.