CPU ADAM 821x
Chapter 2 Hardware description
ADAM 8000 Manual CPU 821x – Rev 1.1
2-11
In addition to the components described in the section on the CPU 821x the
CPU 821xNET module is provided with 2 further LEDs and an Ethernet
interface located at the left-hand side of the module.
The LEDs are located on the left-hand side of the front panel and indicate
communication activities.
The table below shows the color and the meaning of these LEDs.
Name
Color
Description
TxD green
Transmit
data
RxD green
Receive
data
An RJ45 socket provides the interface to the twisted pair cable, required for
Ethernet. The pin assignment of this socket is as follows:
8pin RJ45 socket:
Pin
Signal
1 Transmit
+
2 Transmit
-
3 Receive
+
4 -
5 -
6 Receive
-
7 -
8 -
Star topology
A twisted pair network can only have a star topology. For this purpose a
hub is required as the central node:
Note!
For more detailed information on twisted pair networks refer to chapter
"Deployment of the CPU 821xNET".
CPU 821xNET
LEDs
Ethernet interface
