Siemens SWT 3000 Equipment Manual page 42

Functional Description
2.4 Equipment Versions
[dwswtnbs-120911-01.tif, 1, en_US]
Figure 2-2
2-Wire Connections
2-wire cable connections can be implemented with the narrow-band versions of the SWT 3000.
[dwswtnb2-120911-01.tif, 1, en_US]
Figure 2-3
NBx Narrow-Band version
In this case, the receiver input of the SWT 3000 is connected parallel to the transmitter output. Since there is
only one wire pair available for the transmit and receive direction, use different frequencies.
The variants listed in the following table are provided for the 2-wire connections.
42
Parallel Connection of Several SWT 3000 Units at One Connection
Example of a 2-Wire Connection with Narrow-Band Versions
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020