4 Network topologies
4.4 Combination with network topologies of ex-zone 2, 22
24
OZD Profi G12D... ATEX 1 V. 03 07/2014
For transitions between the ex-zones 1, 21 and 2, 22 an
optical cable for ex-zone 1, 21 a repeater OZD Profi
G12D... ATEX 1 must be used in the ex-zone 1 ,21. Other
network segments outside the zone 1, 21 can be imple-
mented through its second optical interface with
repeaters OZD Profi 12M G11 (PRO), OZD Profi 12M G12
(PRO) or OZD Profi 12M G12 EEC (PRO. All topologies
as per chapter 3.1, 3.2 and 3.3 are applied in the individ-
ual networks.
4.4 Combination with network topologies of ex-zone 2, 22
RS 485-type bus
Optical fibre
Terminal equipment/
bus segment
OZD Profi 12M ...
PRO
CH 1
CH 3
S
E
CH 2
S
E
Terminal equipment/
bus segment
OZD Profi G12D...
ATEX 1
CH 1
CH 3
S
E
CH 2
S
E
Terminal equipment/
bus segment
OZD Profi G12D...
ATEX 1
CH 1
CH 3
S
E
CH 2
S
E
Terminal equipment/
bus segment
OZD Profi G12D...
ATEX 1
CH 1
CH 3
S
E
CH 2
S
E
OZD Profi G12D...
ATEX 1
OZD Profi G12D...
ATEX 1
OZD Profi G12D...
ATEX 1
OZD Profi G12D...
ATEX 1
B
uilding
B
E
x-
Zo
n
e 2
,
22
OZD
Pr
o
fi
G1
2D
...
AT
E
X
1
and
OZD
Pr
o
fi
1
2
M
...
PR
O
B
uilding
A
E
x-
Zo
n
e
1,
2
1
OZD
Pr
o
fi
G1
2D
...
AT
E
X
1
RS 485-type bus
Optical fibre
Fig. 7: Example for a transition from the ex-zone 1, 21 to ex-zone 2, 22