Siemens M7-400 Benutzerhandbuch

5-62

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

The necessary connecting cables, which result from the potential connection of the
analog output module, are not drawn in the figures shown below.

In other words, you must continue to take note of and implement Section 5.13 with
its generally applicable information for connecting loads/actuators.

The abbreviations and mnemonics used in the figure below have the following
meanings:

Q

I

:

Analog output current

M

ANA

:

Reference potential of analog circuit

R

L

:

Load impedance

L +:

Terminal for 24 VDC supply voltage

M :

Ground terminal

U

ISO

:

Potential difference between M

ANA

 and chassis ground

You must connect loads to Q

I

 and the reference point of the analog circuit M

ANA

 of

a current output.

+24 V

R

L

L

+

QI

M

ANA

M

0 V

U

ISO

Chassis ground

Figure 5-23

Connecting Loads to a Current Output of an Isolated AO