Siemens S7-400 Manual Do Utilizador
Interface Submodules
13-42
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
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:
Analog output current
QV:
Analog output voltage
S:
Reference potential of the analog circuit
R
L
:
Load resistance
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.
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.
+24 V
R
L
L
+
QI
Ground bus
V
CM
M
0 V
Figure 13-20 Connecting Loads/Actuators via a Two-Wire Connection to a Current Output