- contact
brown
blue
black
1
3
2
blue
black
brown
With cable connection
Connection box
7.Electrical Connection
Limit switch NBK-R, NBK-RM, NBK-RT, NBK-RA
Attention!
Observe the allowed electrical ratings for the limit switch.
Maximum values
NBK-R
NBK-RM
Standard-
contact
NBK-RT
High
temperature
contact
NBK-RA
ATEX-contact
Switching capacity: 60 W/VA 80 VA 45 W/VA
Switching current: 1 A 1 A 0,6 A
Switching voltage: 230 VAC/DC 250 VAC/DC 230 VAC/DC
Install the switch (if available) according to the
diagram and connect it to the electrical controller.
When switching inductive loads, such as contactors,
relays, etc., electrical limit values should not be
exceeded, also temporarily by e.g. voltage peaks.
The use of a contact protection relay is
recommended to avoid overloading the reed
contacts.
Valid regulations for hazardous areas, and
regulations for installation (DIN/VDE 0165), should
be observed when installing the NBK level indicator
in zone 1 or 2 of hazardous areas (no combustible
liquids).
Note to NBK-RT200:
The contact must be connected by an adequate
switch amplifier (e. g. REL-6005/-6010) to allow for
an ATEX-conform connection of the contact NBK-
RT-200 (see connecting example).
Note to NBK-RA:
Protect the circuit of the limit contact with a fuse.
This fuse must tolerate the permitted nominal
current of the switching contact and must have a
deactivating ability according to the possible short
circuit current of the power system at the place of
installation. The contact is activated by the North
Pole of a magnet and deactivated by its South Pole.
NBK-RA
NBK-R
NBK-RM
NBK-RT
