Page 2–20   
UPLC-II™ System Manual
      Description                                                           Part Number              Digit 6 of
                                                                                                                  UPLC-II Cat. No.
Ethernet Module dual RJ-45 electrical                     CU20-XVRA5-001                M
Ethernet Module dual ST Fiber                                CU20-XVRA6-001                 P
Ethernet Module dual 1 RJ-45 elec, 1 ST Fiber      CU20-XVRA7-001                 R
2.4.6 Ethernet Module 
Description
The Ethernet module is an optional daughter board
that plugs onto the Transceiver board and is
attached by 3 screws. If this option is not pur-
chased, then none of the Ethernet ports will be
available on the UPLC-II™, although the front
port will physically be present, it will not work.
The Ethernet board supports 3 Ethernet ports, two
on the rear which are part of this board, and one
on the front panel. The front port is completely
isolated from the 2 rear ports and is intended sole-
ly for PC interface. The rear Ethernet ports can be
used for PC interface, connection to an Ethernet
network, or for other features such as DNP3 or
IEC61850 communication. 
There are 2 modes of operation for the 2 rear
ports. This mode of operation is selected on the
ADMIN web page of the UPLC-II™. They can
operate:
• One as a standby/redundant port for the
other. (Default Mode)
•  Like  Ethernet  switch  ports  allowing  daisy
chaining of other UPLC™/UPLC-II™s or
Ethernet connected devices with itself. 
Customer interface points:
• Connector (J5) – Only used when placing
this  board  on  older  style  Transceiver
boards  in  UPLCs  to  add  front  port
Ethernet  when  doing  hardware  upgrades.
Requires  a  ribbon  cable  assembly,  part  #
1088-256, to be plugged into connector J5
of this Ethernet  board with  the other end
plugged into connector J1 on the back of
the front display board. The UPLC-II™ does
not need this cable.
• Jumper  (JMP1/2)  –  Always  set  to  the  ON
position for UPLC-II™s but,  if  putting this
board  into  a  UPLC™  with  an  older
Transceiver PC board CU50-XVRMN rev 8
or lower, this jumper has to be set to the OFF
position.  It  works  in  conjunction  with  con-
nector  J5  above  when  adding  a  front
Ethernet  port  to  an  existing  older  UPLC™
allowing the older Transceiver board to still
be used.
• Ethernet  connectors  (J3  –  RJ45  or  U2/U4-
Fiber  ST)  -  Located  on  rear  of  board  and
sticks out through a rectangular cutout in the
back of chassis backplane.
P
L
A
C
E J
U
M
P
E
R P
E
R
C
U
5
0
-
X
V
R
M
N R
E
V  #
≥≤9  ON   OFF 8
J5
JMP1
JMP2
Not to Scale for Reference Only
Component Side
J3
Figure 2–11. Ethernet Module
Connectors/Jumpers