KROHNE DA Flap-type EN - Manual (Page 10)

8 Indicator part
8.1 Contact
inserts
The flowmeter SDA can be equipped with a maximum of two electronic limit
switches.
The limit switch functions with a slot-type initiator which is
operated inductively through the semicircular metal vane
belonging to the measuring pointer. The switching points
are set through the contact pointer. The setting of the
contact pointer serves at the same time for the optical
display of the
set limit.
Contact types: 1 Limit switch
SC3,5-N0-Y 2-wire technology (NAMUR) 2 Contact pointer
SJ3,5-SN 2-wire technology safety-oriented 3 Connecting plug
SJ3,5-S1N 2-wire technology safety-oriented (inverted) 4 Connecting terminal
SB 3.5-E2 3-wire technology 5 Terminal socket
8.1.1 Electrical
connection
The housing cover of the M9 display has to be removed in order to connect the contact insert. The connecting
terminals (4) have a pluggable design and can be removed in order to connect the lines. The built-in contact types are
listed in the rating plate of the display.
Electrical connection of the limit switches in 2-wire technology
Connection assignment for
SC3,5-N0-Y
SJ3,5-SN
SJ3,5-S1N
Electrical connection of the limit switches in 3-wire technology
Connection assignment for
SB3,5-E2
Connection diagram 3-wire technology
Contact MIN MAX
Connector color black gray
Labeling 1 2 3 4 5 6
2-wire technology - + - +
Contact MIN MAX
Connector color black gray
Labeling 1 2 3 4 5 6
3-wire technology + DC - + DC -