Basler Electric BE1-BPR - Manual (Page 116)

5-10 BE1-BPR BESTlogic Programmable Logic 9272000990 Rev J
Outputs may be programmed to be normally energized (ALARM output) or de-energized; e.g., BFO.
Outputs OUT1 through OUT4 are jumper selectable for normally open (NO) or normally closed (NC)
contacts. Changing an output contact’s configuration requires moving a soldered jumper located on the
printed circuit board. Caution should be taken with NC outputs because there are no shorting bars to
maintain the closed condition if the electronics are removed from the chassis. In situations where a NC
contact is required even when the electronics are removed, it is recommended that a NO output be used
to drive an external low cost auxiliary relay. The NC output of the auxiliary relay can then be used and the
electronics can still be drawn out. Alternately, an external switch can be used to short across the NC
output when the electronics are removed. Extra care is required to make sure this is done and that the
short is removed once the electronics are reinstalled.
BE1-BPR PREPROGRAMMED PROTECTION SCHEMES
Each BE1-BPR relay comes with a number of preprogrammed breaker failure logic schemes that are
preprogrammed into non-volatile memory. Section 2, Application, contains descriptions of the logic
schemes and their applications.
For reference, each of the preprogrammed schemes and their corresponding logic equations are provided
on the following pages.