Analog Modules
5-98 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Unused Channels
Unused channels can usually be left open. Put the measuring range modules in
position “B”. You can improve the noise immunity of the module in a measuring
environment with serious interference by connecting M– and MANA.
Measuring Ranges
You set the measuring ranges by means of the measuring range modules on the
module and the “Measuring Type” parameter in STEP 7.
Table 5-60 Measuring Ranges of the SM 431; AI 8 x 14 Bit (6ES7431-1KF20-0AB0)
Method Selected Measuring Range
(Type of Sensor) Measuring Range
Module Setting Description
U: Voltage " 1 V AYou will find the digitized analog
l i S ti 53 1 i th
1 to 5 V
" 10 V
Bvalues in Section 5.3.1 in the
voltage measuring range
2DMU: Current
(two-wire transmitter) 4 to 20 mA DTo supply these transmitters with
current you must connect 24 V to
the L+ and M front connector
terminals.
You will find the digitized analog
values in Section 5.3.1 in the
current measuring range
4DMU: Current
(four-wire transmitter) 4 to 20 mA
" 20 mA
CYou will find the digitized analog
values in Section 5.3.1 in the
current measuring range
R-4L: Resistor
(four-conductor
terminal)
600 AYou will find the digitized analog
values in Section 5.3.1 in the
resistance measuring range
Default Settings
The module has the following default settings in STEP 7:
•Channels 0 to 7: “Voltage” for the measuring method ; “" 10 V” for the
measuring range
You can use these measuring methods and measuring ranges without
parameterizing the SM 431; AI 8 14 Bit in STEP 7.