[dw_serma2, 1, en_US]
Figure 4-6 Redundant Communication with 2 Masters Using RS485 Bus (for Example, Redundant
IEC 60870-5-103 Protocol)
The preceding figure shows the use of both connections on one module for connecting the devices to 2 inde-
pendent masters following the same principle as with a single master.
Reorders
When reordering serial communication modules, specify the product code for the physical version of the
module. The order configurator (IPC configurator) shows you which applications are capable of running on the
module:
•
Serial
•
1-channel or 2-channel
•
Electrical or optical
USART-AB-1EL
Description
Serial asynchronous communication module with one electrical inter-
face
Product code P1Z79
Figure
Connector type 2 x RJ45
Baud rate 1.2 kbit/s to 115.2 kbit/s
Protocol IEC 60870-5-103
DNP3
SUP serial
4.2.3.2
Plug-In Modules
4.2 Communication Modules
SIPROTEC 5, Hardware Description, Manual 163
C53000-G5040-C002-M, Edition 12.2021
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