VEGA VEGAPULS 56 Profibus PA - Manual (Page 40)

40 VEGAPULS 56 Profibus PA
4.3 Connection of the sensor
After mounting the sensor at the measure-
ment location according to the instructions in
chapter "3 Mounting and installation“, loosen
the closing screws on top of the sensor. The
sensor lid with the optional indication display
can then be opened. Unscrew the sleeve nut
and slip it over the connection cable (after
removing about 10 cm of insulation). The
sleeve nut of the cable entry has a self-lock-
ing ratchet that prevents it from opening on
its own.
Now insert the cable through the cable entry
into the sensor. Screw the sleeve nut back
onto the cable entry and clamp the stripped
wires of the cable into the proper terminal
positions.
The terminals hold the wire without a screw
(spring-loaded terminals). Press the white
opening tabs with a small screwdriver and
insert the copper core of the connection
cable into the terminal opening. Check the
hold of the individual wires in the terminals by
lightly pulling on them.
Electrical connection
Example 2
You want to set address 27.
16 + 8 + 2 + 1 = 27
You must set the DIP switches
5 = 16
4 = 8
2 = 2
1 = 1
to "ON“.
Example 3
You want to set address 99
64 + 32 + 2 + 1 = 99
You must set the DIP switches
7 = 64
6 = 32
2 = 2
1 = 1
to "ON“.
Software addressing
The DIP switches must be set to an address
of 126 … 255, i.e.
- either all DIP switches are set to "ON“,
corresponding to address 255 (delivery
status)
ON Addr.
8 7 6 5 4 3 2 1
OFF
1
2
4
8 16
32
64
128
8 7 6 5 4 3 2 1
- or only DIP switch 8 is set to "ON“, corre-
sponding to address 128.
Of course, software addressing is also pos-
sible, if the switches 7 … 2 are set to "ON“
(address 126).
The adjustment of the address with software
VVO is described in chapter "5.2 Adjustment
with VVO“ under the heading "Software ad-
dressing“ or in chapter "5.3 Sensor adjust-
ment with the adjustment module MINICOM“.