Connecting counter sensors and their supply
(Original Document)
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Process diagram:
NOTE: In order to use counter proximity sensors, it is necessary to polarize the EPSR input (encoder return supply). To do this, connect:
  • the EPSR (terminal 18) to the + 24 VDC sensor supply (terminal 26 or 28),
  • the –0 VDC sensor supply (terminal 27) to the –0 VDC encoder supply (terminal 25).