Balluff BMD 1H Series, User Manual

Page: 101 / 474

19 ÏÏÏƖº¹ÄÄÍŰƖ»ÇÅ
5 Connecting to power supply
54455-EN-170712
If screened cable is required, we recommend connecting the cable
screen on both ends to ground potential. In the sensor, the screen
must be connected directly to the internal ground terminal. The
ground terminal on the outside of the housing must be connected to
the ground potential (low impedance).
In Ex systems, the grounding is carried out according to the installa-
tion regulations.
In electroplating plants as well as plants for cathodic corrosion protec-
ÌÁÇÆÁÌÅÍË̺½Ì¹Ã½ÆÁÆÌǹ»»ÇÍÆÌÌÀ¹ÌËÁ¿ÆÁŲ»¹ÆÌÈÇ̽ÆÌÁ¹Ä¼ÁŰ½Ê½Æ»½Ë
exist. This can lead to unacceptably high currents in the cable screen
if it is grounded at both ends.
Information:
À½Å½Ì¹ÄÄÁ»È¹ÊÌËǾÌÀ½ÁÆËÌÊÍŽÆÌƼÈÊÇ»½ËËŲÌÌÁÆ¿Ɠ˽ÆËÇÊƓ»ÇÆ»½Æ -
tric tube, etc.) are connected with the internal and external ground
terminal on the housing. This connection exists either directly via
the conductive metallic parts or, in case of instruments with external
electronics, via the screen of the special connection cable.
ÇÍ»¹ÆŲƼËȽ»ÁŲ»¹ÌÁÇÆËÇÆÌÀ½ÈÇ̽ÆÌÁ¹Ä»ÇÆƽ»ÌÁÇÆËÁÆËÁ¼½ÌÀ½
instrument in chapter " Technical data ".
5.2 Connecting
The voltage supply and signal output are connected via the spring-
loaded terminals in the housing.
Connection to the display and adjustment module or to the interface
adapter is carried out via contact pins in the housing.
Information:
The terminal block is pluggable and can be removed from the
electronics. To do this, lift the terminal block with a small screwdriver
and pull it out. When reinserting the terminal block, you should hear it
snap in.
Proceed as follows:
1. Unscrew the housing lid
2. If a display and adjustment module is installed, remove it by turn-
ing it slightly to the left
3. Loosen compression nut of the cable gland and remove blind
plug
4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of the individual wires
5. Insert the cable into the sensor through the cable entry
Cable screening and
grounding
Connection technology
Connection procedure