KROHNE GA 24 EN - Manual (Page 13)

ELECTRICAL CONNECTIONS
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GA24
www.krohne.com 02/2011 - 4001229901 MA GA24 R01 en
4.2.1 MS14 limit switch connection
The switching function requires a float with integrated magnet.
4.2.2 TG21 limit switch connection
The TG 21 is adapted for switch amplifiers with an intrinsically safe circuit as per DIN EN 50227
NAMUR.
The TG 21 includes an inductive slotted proximity switch with bistable switching characteristics.
The slotted proximity switch is activated by the immersion of an aluminum lug. The magnet of
the immersion lug is moved by the magnet in the float.
The switching function requires a float with integrated magnet.
Figure 4-2: Connection limit switch type MS14
1 Connection Reed-switch
2 Connection Receiver device
3 Terminal connection (potential-free)
Figure 4-3: Connection limit switch type TG21
1 Terminal -
2 Terminal +
MA_GA24_R01_en_4001229901_PRT.book Page 13 Wednesday, February 2, 2011 8:57 AM