5.6.2 Connecting remote communication interfaces LDCM
The Line Data Communication Module (LDCM), see figure 26 is the hardware
used for the transfer of binary and analog signal data between IEDs in different
protection schemes on the IEEE/ANSI C37.94 protocol. The optical ports on the
rear side of the IED are X312 and X313. For location of LDCM, refer to section
"Rear side connectors".
5.7 Installing the serial communication cable for RS485
5.7.1 RS485 serial communication module
RS485
PWB
Screw
terminal
X1
Backplate
Screw
terminal
X3
Angle
bracket
1
2
4
5
6
3
1
2
en07000140.vsd
IEC07000140 V1 EN
Figure 51: The connection plate to the backplate with connectors and screws.
This figure also shows the pin numbering from the component side
Pin
Name 2-wire Name 4-wire Description
x3:1 soft ground
x3:2 soft ground
x1:1 RS485 + TX+ Receive/transmit high
or transmit high
x1:2 RS485 – TX- Receive/transmit low
or transmit low
x1:3 Term T-Term Termination resistor
for transmitter (and
receiver in 2-wire
case) (connect to TX+)
x1:4 reserved R-Term Termination resistor
for receiver (connect to
RX+)
x1:5 reserved RX- Receive low
x1:6 reserved RX+ Receive high
Table continues on next page
1MRK 502 029-UEN A Section 5
Installing the IED
77
Installation and commissioning manual
To Next Page
Loading...
