Siemens SIMATIC S7-200 System Manual page 432

S7-200 Programmable Controller System Manual
Configuration for EM 235
Table A-22 shows how to configure the EM 235 module using the configuration DIP switches.
Switches 1 through 6 select the analog input range and resolution. All inputs are set to the same
analog input range and format. Table A-22 shows how to select for unipolar/bipolar (switch 6), gain
(switches 4 and 5), and attenuation (switches 1, 2, and 3). In these tables, ON is closed, and OFF
is open. The switch settings are read only when the power is turned on.
Table A-22 EM 235 Configuration Switch Table to Select Analog Range and Resolution
SW1 SW2
ON OFF
OFF ON
ON OFF
OFF ON
ON OFF
ON OFF
OFF ON
SW1 SW2
ON OFF
OFF ON
OFF OFF
ON OFF
OFF ON
OFF OFF
ON OFF
OFF ON
OFF OFF
418
Unipolar
SW3 SW4 SW5
OFF ON OFF
OFF ON OFF
OFF OFF ON
OFF OFF ON
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
Bipolar
SW3 SW4 SW5
OFF ON OFF
OFF ON OFF
ON ON OFF
OFF OFF ON
OFF OFF ON
ON OFF ON
OFF OFF OFF
OFF OFF OFF
ON OFF OFF
Full Scale Input Full-Scale Input
SW6
ON 0 to 50 mV
ON 0 to 100 mV
ON 0 to 500 mV
ON 0 to 1 V
ON 0 to 5 V
ON 0 to 20 mA
ON 0 to 10 V
Full-Scale Input Full Scale Input
SW6
OFF +25 mV
OFF +50 mV
OFF +100 mV
OFF +250 mV
OFF +500 mV
OFF +1 V
OFF +2.5 V
OFF +5 V
OFF +10 V
Resolution Resolution
12.5 mV
25 mV
125 mV
250 mV
1.25 mV
5 mA
2.5 mV
Resolution Resolution
12.5 mV
25 mV
50 mV
125 mV
250 mV
500 mV
1.25 mV
2.5 mV
5 mV