Connection Of Outputs In Parallel And Switching On The Load Via A Contact - Siemens S5-155U System Manual

8.2.5
Connection of Outputs in
Parallel and Switching On
the Load via a Contact
Digital output modules for
DC voltage
2L+
Output
1
2L-
Figure 8-10 Parallel Connection of Outputs for DC Voltage Outputs
Digital output modules for AC
voltage
System Manual
C79000-B8576-C199-03
Caution
The parallel connection of outputs to increase the load is not
permissible.
Outputs of modules with the same load voltage supply may be
connected in parallel without additional circuitry.
An external diode must be fitted to the output lines of modules fed
from different load voltage supplies (exception: 453, 457). In the case
of different logic states of the two outputs, the maximum permissible
output current corresponds to that of the lower stage.
The contact (e.g. for manual operation) is connected to one of the
two L+.
Manual
A1 A2
Load
Outputs can be connected in parallel without increasing the load if
they are connected to the same phase (L) and the same neutral
conductor (N).
The load must be at least 50 mA per output to keep to the permissible
residual voltage at logic 0. The maximum switching current of 2 A per
load must not be exceeded.
Installation and Startup
1L+
Output
2
1L-
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