4-39
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b
In a 2-wire circuit there are no sensor lines. A 2-wire circuit for voltage out-
put is possible if the line resistance of the signal lines is negligible with
respect to the load resistance.
Close the DIL switches in DIL switch block S2 in order to obtain a precise
output voltage in the 2-wire circuit. This creates a low-ohmic link between
the sensor input and the associated output, thus preventing a circuit-related
error due to the output-voltage feedback.
The illustration below shows how to connect loads in a 2-wire circuit for
voltage output.
1
234
5
678
ON
ON
CH0
CH1
CH2
CH3
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
R
L
R
L
S2
Shield
.
Figure 4-26
Connection of Loads to ET 200C; AO 4
12 Bit, 2-Wire Circuit for
Voltage Output
Load in 2-Wire
Circuit (Voltage
Output)
Mechanical and Electrical Installation
Summary of Contents for SIMATIC ET 200C
Page 18: ...xviii ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Contents ...
Page 26: ...1 8 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Configuration ...
Page 44: ...2 18 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b ET 200C Configuration Options ...
Page 68: ...3 24 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b ET 200C Components ...
Page 202: ...10 4 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b General Technical Specifications ...
Page 226: ...11 24 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Digital Modules ...
Page 270: ...12 44 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Analog Modules ...
Page 280: ...13 10 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Other ET 200C Components ...
Page 310: ...C 4 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Safety Related Guidelines ...
Page 318: ...Glossary 8 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Glossary ...
Page 324: ...Index 6 ET 200C Distributed I O Station EWA 4NEB 812 6119 02b Index ...