VEGA VEGAPULS 81 - Manual (Page 51)

VEGAPULS 64 and 81 51
5.4 Connection diagram of
VEGAPULS 81 series
Loosen the six hexagon socket screws on the
upper side of the sensor and remover the
cover of the terminal box. On the upper inner
side of the terminal box cover there is a bent
pin. Insert this pin in the terminal box cover
into the mean upper hole of the open terminal
box. hence the terminal box cover is kept
carefully during the connection work.
Connect the screen of the sensor cable with
an earth conductor of the power supply (e.g.
supply with 90 … 250 V AC) to the screen and
earth terminal in the terminal box. Connect
then the system earth (foundation or plate
earth) with the outer earth connection terminal
on the upper back side of the yellow sensor
housing or on the back of the flange.
Electrical connection
5 6 7 8 9 10
+5V SCL GND I + I - U + U - I + I -
1 2 3 4
SDA
Terminal board with
intrinsically safe circuits
(EEx ia)
Terminal board with
circuits in increased
safety (EEx e)
Cable entries
1 … 4 M20 x 1,5 (cable
diameter 5 … 9 mm)
Note:
The cable diameter of the connection cables
must be min. 5 mm ø and max. 9 mm ø.
Otherwise the seal effect of the cable entries
will not be ensured.
Open terminal box of VEGAPULS 81 - total view
Earth termi-
nal
Note:
Carry out screening only on one sensor end. Screen terminal
and earth terminal are electrically connected.
Screen and earth
terminal
Screen and earth
terminal or earth
conductor