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Parameters of the Ex ia circuits (combined circuits) on the WP Board:
RS485
Uo
Po
Co
Lo/Ro 135 µH/
Ui
Ii
Pi
Ci
Rmin of the external intrinsically safe circuit is
defined by Ui / Ii and is
Ui
Rmin 95.4
Signal
RxD-TxD-P
RxD-TxD-N
Signal GND
UNICOM
Connector for
cable
ProfiBus,
DeviceNet, etc.
Connector for
cable
4...20mA
Input parameters (combined circuits) for UNICOM:
Ui
6.8 V
Output parameters (combined circuits) for UNICOM:
Uo
6.0 V
176
Betriebsanleitung Combics CAIXS2
5.4 V
Io
74 mA***
183 mW
50 µF
Lo
600 µH
±12.6 V
12.0 V
6.0 V
135 mA*** 164 mA*** 3.3 A***
any
260 nF
Li
0 mH
±12.6 V
12.0 V
6.0 V
73.2
2.2
M
J
K
Connector
J
K
M
*: versus ground; **: between the lines; ***: resistively limited
Ii
Pi
200 mA
600 mW
Io
Po
23 mA
34 mW
2018-08-27
T. Hiller
RS232
Uo
10.8 V* / 21.6V**
Po
295 mW
Co
2.14 µF* / 174nF** Lo
Lo/Ro 120 µH/
Ui
12.6V* / 25.2V**
Pi
any
Ci
3 nF* / 0.5nF**
M
J
N
K
A
Signal
Connector
CTS
N
DTR
A
RxD
K
TxD
J
Signal GND
M
Ci
Li
3 µF
20 µH
Co
Lo
10 µF
3 mH
C C o o n n t t r r o o l l D D r r a a w w i i n n g g
6 6 6 6 0 0 1 1 5 5 - - 7 7 5 5 1 1 - - 0 0 7 7
Io
110 mA***/55 mA
2 mH
Ii
328 mA***
Li
0 mH
C C A A I I X X S S 2 2
0 0 4 4
4 4
5 5
R R e e v v i i s s i i o o n n
S S h h e e e e t t
o o f f
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