beautypg.com

Siemens Simatic S7-400 User Manual

Page 314

background image

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 M

ANA

.

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

A

You will find the digitized analog

l

i S

ti

5 3 1 i th

1 to 5 V

"

10 V

B

values in Section 5.3.1 in the
voltage measuring range

2DMU: Current
(two-wire transmitter)

4 to 20 mA

D

To 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

C

You will find the digitized analog
values in Section 5.3.1 in the
current measuring range

R-4L: Resistor

(four-conductor
terminal)

600

W

A

You 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.

This manual is related to the following products: