KROHNE VA 40-VA 45 EN - Manual (Page 20)

4
ELECTRICAL CONNECTIONS
20
VA40 - VA45
www.krohne.com 09/2013 - 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.
MA_VA40_45_R04_en_424402_PRT.book Page 20 Monday, September 16, 2013 8:50 AM