Siemens Simatic S7-300

Analog modules
6.8 Analog input module SM 331; AI 2 x 12 bit; (6ES7331-7KB02-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-69
6.8.1 Measuring methods and ranges
Introduction
Module SM 331; AI 2 x 12 Bit has a measuring range module. Use the measuring range
module and the "measuring method" parameter in
STEP 7 to set the measuring methods
and measuring ranges. The "voltage" measuring method and "± 10V" measuring range are
set by default at the module. You can those default settings without having to program the
SM 331; AI 2 x 12 Bit in
STEP 7 .
Measuring range module
Reposition the measuring range module to suit the measuring method and range (see the
chapter
Setting measuring methods and ranges of analog input channels ). The necessary
settings are also available on the module's imprint.
Table 6-21 Measuring methods and ranges
Selected measuring method Measuring range
(type of sensor)
Measuring range module settings
± 80 mV
± 250 mV
± 500 mV
± 1000 mV
A
V: Voltage
± 2.5 V
± 5 V
1 to 5 V
± 10 V
B
TC-I: Thermocouple
(internal comparison) (thermal voltage
measurement)
TC-E: Thermocouples
(external comparison)
(thermal voltage measurement)
Type N [NiCrSi-NiSi]
Type E [NiCr-CuNi]
Type J [Fe-CuNi]
Type K [NiCr-Ni]
Type L [Fe-CuNi]
A
2DMU: Current (2-wire transducer) 4 mA to 20 mA D
4DMU: Current (4-wire transducer) ± 3.2 mA
± 10 mA
0 mA to 20 mA
4 mA to 20 mA
± 20 mA
C
R-4L: Resistance
(4-wire connection)
150 Ω
300 Ω
600 Ω
A