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Notes
1. Selected
“Ex i”
-Equipment shall have intrinsically safe outputs for
Ex ia IIC T4 Ga
Class I, Zone 1, AEx ia IIC T4 Ga
2.
Caution
: Use connection XEXT1 either for charging (pin 4,5) outside the hazardous area or the
RS485 port (pin 1,2,3). Using XEXT1 for both applications at the same time is not permitted.
3.
Caution
: Use connection XEXT2 either for the relay output (pin 4, 5, 6) or the RS485 port (pin 1,2,3).
Using XEXT2 for both applications at the same time is not permitted.
4.
Warning:
Live maintainance is not permitted in Zone 0 areas.
5.
Warning:
Substitution of components may impair intrinsic safety.
6.
Cable Parameters
:
If cable parameters are unknown, use the following parameters:
Cable Capacitance: C
c
= Ccable = 60 pF/ft (200 pF/m)
Cable inductance: L
c
= Lcable = 200 nH/ft (660 nH/m)
„Ex i“
- Equipment:
Uo <= 8.01 V
Io <= 0.105 A
Po <= 0.21 W
Co <= 350 nF
Lo <= 250 uH
RS485-A
RS485-B
XEXT1
Ex i Equipment
Uimax
8.01 V
>=
8.01 V
Iimax
0.105 A
>=
0.105 A
Pimax
0.21 W
>=
0.21 W
Ci
250 nF
+C
c
<=
350 nF
Li
100 uH
+L
c
<=
250 uH
Shielding optional
„Ex i“
- Equipment:
Uo <= 8.01 V
Io <= 0.105 A
Po <= 0.21 W
Co <= 350 nF
Lo <= 250 uH
RS485-A
RS485-B
Shielding optional
XEXT2
Ex i Equipment
Uimax
8.01 V
>=
8.01 V
Iimax
0.105 A
>=
0.105 A
Pimax
0.21 W
>=
0.21 W
Ci
250 nF
+C
c
<=
350 nF
Li
100 uH
+L
c
<=
250 uH
2 (3)
2 (3)
Thomas Treptow
2020-12-08T11:07:20
Andreas Suerig
2020-12-08T11:58:01
Title
Document Number - Revision
Page
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AAC 00xx and AAC 03**
can be connected with non-
intrinsically safe quipment
(e.g. a PC RS485 interface)
via Z-barriers:
Notes
1.
XEXT1 and/or XEXT2 can be used
for connection of non-intrinsically
safe equipment via Z-barriers. As
an example the circuit diagram
shows a connetion to XEXT2.
2.
Series connection of the types
Fuchs Z757
with
Pep-
perl+Fuchs Z966H
(BAS 01 ATEX
7005 and IECEx S06.0012 xx) is
permitted as shown.
3.
Barrier must be installed as instruc-
ted by the manu
facturer’s control
drawing.
4.
Caution
: Use connection XEXT1
either for charging (pin 4,5) outside
the hazardous area or the RS485
port (pin 1, 2, 3). Using XEXT1 for
both applications at the same time
is not permitted.
5.
Caution
: Use connection XEXT2
either for the relay output (pin 4, 5,
6) or the RS485 port (pin 1, 2, 3).
Using XEXT2 for both applications
at the same time is not permitted.
6.
Warning:
Substitution of compo-
nents may impair intrinsic safety.
7.
Cable Parameters:
Use Belden
3107A, 2 x 2 AWG22. Maximum
length = 25 m = 82 ft between
AAC 00xx and the Z-barriers.
Connection of „Ex i“
-Equipment in Hazardous Areas
