5 Startup
5.6 Connect electrical bus cables
38
OZD Profi G12D... ATEX 1 V. 03 07/2014
z
Warning!
OZD Profi G12DU ATEX 1: The sheath of the data
cable must be connected in the control cabinet
together with the functional earth connection to a
potential equalisation bar.
OZD Profi … DK … and OZD Profi … DE … :
The connection for the functional earth on the
housing must be connected to the potential equal-
isation bar.
The potential equalisation bars of the control cabi-
nets, which are mutually connected via an electri-
cal RS 485, must be connected mutually at low-
resistance.
z
Warning!
Do not connect any RS 485 bus cables, which are
laid wholly or partially outside
the building. Otherwise, lightning strikes in the
area may destroy the repeater.
Establish the bus connections, leave the build ing
with fibre optic cable!
z
Warning!
There is no galvanic separation between the bus
cables and the functional earth connection.
Hence follow the follow ing safety infor mation:
Do not connect the repeater via bus cables with
system parts, having a different earth potential.
The potential differences may lead to destruction
of the repeater!
S0 S1 S2 S3 S4 S5 S6 S7
Sys
te
m
C
H1
C
H
2
C
H
3
C
H
3
C
H
2
24
V*
24
V
DI
B
DI
A
0V
0V
FG FG
DO
B
DO
A
CH
0V
F
NC
F
NO
CH
3
CH
2
F
94388
1
32
1
00000000
1
S
e
r.
-No
.
: 0
1
23456789
Fig. 23: Cable lead-through of the electrical bus cables for OZD
Profi G12DK ATEX 1
(OZD Profi ... DE ... : analog)
Lead both the RS 485 cables OZD Profi G12DK ATEX
1 and OZD Profi G12DE ATEX as shown in figure 23
through the two cable entries (PG-glands).