User Manual

20
Installation and wiring
7.3.4. Wiring the output module "OUT"
The "OUT" outputs module has two 4-20 mA analogue outputs and two digital outputs. The outputs are galvani-
cally insulated, and therefore voltage free.
+-
+-
1
I+
I-
I+
I-
FE
T+
T-
T+
T-
0 VDC
+
-
12-36 VDC
+
-
0 VDC
12-36 VDC 0 VDC
12-36 VDC
12-36 VDC
0 VDC
2 3 4 5 6 7 8 9
(AO1) (AO2) (DO1) (DO2)
Load 2
Load 1
1st 4-20 mA
input (at external
instrument)
2nd 4-20 mA input (at
external instrument)
digital outputsanalogue outputs
(designation in the configuration menus of the Mx
additional output module)
FE = functional earth
Figure 11 : Wiring the "OUT" output module
7.3.5. Wiring the "pH/ORP" module
• Wire a pH/redox sensor in symmetrical mode to obviate the influence of interference and, in this case,
wire the equipotential electrode (compulsory).
• When the pH/redox sensor is wired in asymmetrical mode, measurement of the pH or the oxidation
reduction potential may drift over time when the equipotential electrode is not wired.
Type 8619
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