Rockwell Automation 865 Differential Protection Relay - Manual (Page 127)

Chapter
7
865-UM001A-EN-P – July 2009
Communications
Communication Ports
The relay has three communication ports as standard.
There are three communication ports in the rear panel. The Ethernet
port is optional. The X4 connector includes two ports: local port and
extension port. The front panel RS-232 port will shut off the local
port on the rear panel when a programming cable (#857-VX003-3)
is inserted.
Note: By default the X5 is a D9S type
connector with TTL interface. The DSR
signal from the front panel port selects
the active connector for the RS232
local port.
1 2 3 4 5
6 7 8 9
D9S
F
ron
t
pa
nel
in
us
e
Rx in
DSR in
LOCAL
PORT
EXTENSION
PORT
REMOTE
PORT
Tx out
RS-232
DTR out
+8 V GND
FRONT PANEL
COMMUNICATION PORTS
Communication
option 1
Communication
option 2
X9
X10
Figure 7.1 – Communication Ports and Connectors
By default the remote port has a TTL interface. It can only be used
together with external converters or converting cables. Built-in
options for RS-485, fiber optic (plastic/plastic, plastic/glass,
glass/plastic or glass/glass), Profibus and Ethernet are available.