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3 INSTALLATION
Connecting the 8225 compact transmitter, 115/230 VAC, with relays, to a PLC
The 4-20 mA output of the transmitter, 115/230 VAC with relays can be connected to
a PLC. Depending on the PLC type, set switch [1] to position "SOURCE" or to position
"SINK" (see figures below and 3.9).
4-20 mA
+
-
Switch [1]
Iout
(see fig. 3.9)
CURRENT
SOURCE SINK
Without
With
SENSOR
1
PT1000
2
3
CELL
4
Connection in sourcing mode
(*) If direct earthing is impossible, connect a 100 nF/50 V capacitor between the negative terminal and the earth.
Fig. 3.14
Connecting compact transmitter, 115/230 VAC, with relays, to a PLC
F1
+
-
12-30 VDC
(*)
PE
NC L+
L-
PE
PE
Iout
L+
L-
Supply
12..30Vdc
E-27-
CONDUCTIVITY 8225
4-20 mA
+
-
Switch [1]
Iout
(see fig. 3.9)
CURRENT
SOURCE SINK
Without
With
SENSOR
1
PT1000
2
3
CELL
4
Connection in sinking mode
F1
+
-
12-30 VDC
(*)
PE
NC L+
L-
PE
PE
L+
L-
Iout
Supply
12..30Vdc
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