Overview
The PowerLink system permits carrier frequency transmission of speech, data, telecontrol, and teleprotection
signals via high voltage overhead power lines and cables.
Carrier frequency equipment must match the particular characteristics of the high voltage line. High interfer-
ence levels over the transmission link and the high attenuation over longer transmission routes require partic-
ularly powerful transmission. The requirements for reliability and availability are especially high in relation to
the transmission of protection signals. For the most efficient utilization of the available frequency range, a
high degree of selectivity is necessary.
In opposition to other PLC systems there is no additional hardware required for channel allocation. For the
different applications like voice, data or protection signal transmission with the SWT 3000, the equipment can
be extended by integrating modules (VFM, VFS resp. VFO) for connecting a modem or external teleprotec-
tion as well as for various telephony services.
[cdbldipl-200813-01.tif, 1, en_US]
Figure 2-1
PowerLink block diagram
VF
Voice frequency
iSWT
integrated SWT 3000
VFO
VF interface FXO
vMUX
versatile MUX
VFS
VF interface FXS
iFSK
integrated FSK channel
VFM
VF interface E&M
DP
Data Pump
X.21-x
sync. digital interface
AGC
autom. gain control
RS232
async. digital interface
ATT
attenuator
aF21…5
analog voice ch. 1 to 5
SL
StationLink
BL
Board Link
CFS-2
Carrier frequency section
PLPA
PowerLink power amplifier
CSPi
Central Signal Processing
AMP50
power amplifier 50 W
RXF
receive filter
TXF
Transmit filter
fE1
fractional E1 interface
2.1
PowerLink Description in Brief
2.1 Overview
22
Smart Communications, PowerLink 100 and PowerLink 50, Product Information
E50405-U53-X-B3-7670, Edition 11.2014