Connecting Loads/Actuators To Voltage Outputs - Siemens SIMATIC S7-300 Reference Manual

4.14

Connecting Loads/Actuators to Voltage Outputs

Connecting Loads to a Voltage Output
Connecting loads to a voltage output is possible both in a four-conductor and a
two-conductor connection. However, not all analog output modules allow both
types of connection.
Note
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 4.13 with
its generally valid information for connecting loads and actuators.
Abbreviations and mnemonics used in the figures below
The abbreviations and mnemonics used in the figures below have the following
meanings:
Q :
V
S +:
S–:
M
ANA
R :
L
L +:
M :
U :
ISO
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Analog output voltage
Detector lead (positive)
Detector lead (negative)
: Reference potential of analog circuit
Load impedance
Terminal for 24 VDC supply voltage
Ground terminal
Potential difference between M and M terminal of CPU.
ANA
Analog Modules
4-67