KROHNE VA40 - 4.6 Limit Switch Function Reversal

4 ELECTRICAL CONNECTIONS
20
VA40 - VA45
www.krohne.com 08/2015 - 4000424402 - MA VA40-45 R04 en
4.6 Limit switch function reversal
4.6.1 Conversion of the function of ring type limit switch
Bistable ring type limit switches can be changed over from NO to NC.
• Remove upper device connection
• Unscrew upper union nut
• Lift up and remove connection very carefully.On depending adhesion of the upper sealing ring,
the connection may take the measuring glass with it!
• Untighten plastic screw 1 on ring limit switch
• Carefully take the measuring glass out of the housing and the sensor. The ring limit switch
remains in the housing. Avoid CANTING (glass breakage!)
• Turn limit switch through 180°
• Assemble in reverse order. Make sure sealing ring is seated correctly!
4.6.2 Conversion of the function of limit switch MS14
Two contact functions are available:
• Closing, at increasing flow. Arrow on reed cartridge points towards measuring glass.
• Closing, at decreasing flow. Arrow on reed cartridge points away from measuring glass.