Siemens Simatic S7-200 System Manual page 366

S7-200 Programmable Controller System Manual
Fixed Terminal Block
Figure A-10
Configuration for EM 231
Table A-18 shows how to configure the EM 231 module using the configuration DIP switches. Switches 1,
2, and 3 select the analog input range. All inputs are set to the same analog input range. In this table, ON
is closed, and OFF is open.
Table A-18
A
354
EM 231
Gain Configuration
Calibration Potentiometer and Configuration DIP Switch Location for the EM 231 and EM 235
EM 231 Configuration Switch Table to Select Analog Input Range
Unipolar
SW1 SW2
OFF
ON ON
ON
Bipolar
SW1 SW2
OFF
OFF
ON
↑On
↓Off
Fixed Terminal Block
Full-Scale Input
SW3
ON 0 to 10 V
0 to 5 V
OFF
0 to 20 mA
Full-Scale Input
SW3
±5 V
ON
± 2.5 V
OFF
EM 235
↑On
↓Off
Gain Offset Configuration
Resolution
2.5 mV
1.25 mV
5 µA
Resolution
2.5 mV
1.25 mV