Siemens Simatic M7-400 Reference Manual page 538

Interface Submodules
13.7.3 Connecting Loads/Actuators to Analog Outputs
Abbreviations Used
The abbreviations used in Figures 13-20 to 13-21 have the following meanings:
QI:
QV:
S:
R :
L
Figures 13-20 and 13-21 show you how you must connect loads/actuators to the
current or voltage outputs of the analog output module.
Connecting Loads to the Current Output
The following figure shows wiring on one channel as an example.
Figure 13-20 Connecting Loads/Actuators via a Two-Wire Connection to a Current Output
13-42
Analog output current
Analog output voltage
Reference potential of the analog circuit
Load resistance
Ground bus
S7-400, M7-400 Programmable Controllers Module Specifications
+24 V
L
+
QI
R
L
V
CM
M 0 V
A5E00069467-07