Siemens SWT-3000 User Manual

SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 15
2-wire connections 2-wire cable connections can be implemented with the narrow band ver-
sions of the SWT 3000.
T
R
T
R
SWT 3000 SWT 3000
NB12 NB21
NBx Narrowband Version
Figure 7: Example of a 2-wire connection with narrow band versions
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, different frequencies must be used.
The variants listed in the following table are provided for this.
Table 3: Narrow band variants for VF 2-wire connections
Direction Variant NB12: Transmit channel 1 Receive channel 2
Reverse
direction
Variant NB21: Transmit channel 2 Receive channel 1
Direction Variant NB13: Transmit channel 1 Receive channel 3
Reverse direc-
tion
Variant NB31 Transmit channel 3 Receive channel 1
Direction Variant NB23 Transmit channel 2 Receive channel 3
Reverse direc-
tion
Variant NB32 Transmit channel 3 Receive channel 2

Siemens SWT-3000 Specifications

General

Brand	Siemens
Model	SWT-3000
Category	Industrial Electrical
Language	English