Rockwell Automation 865 Differential Protection Relay - Manual (Page 132)

7-6 Communications
865-UM001A-EN-P – July 2009
Extension Port X4
This is a non-isolated RS-485 port for external I/O devices. The port
is located in the same rear panel D9S connector X4 as the local port,
but pins (7, 8, 5) are used instead of the standard RS-232 pins (2, 3,
5) used by the local port. See Figure 7.1.
Table 7.4 – Extension Port X4 Parameters
Parameter Value Unit Description Note
Protocol
None
SPA-bus
ProfibusDP
ModbusSla
ModbusTCPs
IEC-103
ExternalIO
DNP3
Protocol selection for the extension
port.
Command line interface for
SetPointPS
SPA-bus (slave)
Profibus DB (slave)
Modbus RTU slave
Modbus TCP slave
IEC-60870-5-103 (slave)
Modbus RTU master for external
I/O-modules
DNP 3.0 Set
Msg# 0 ... 2 32 –1 Message counter since the device
has restarted or since last clearing Clr
Errors 0 ... 2 16 –1 Protocol errors since the device has
restarted or since last clearing Clr
Tout 0 ... 2 16 –1 Timeout errors since the device has
restarted or since last clearing Clr
speed/DPS
Default =
38400/8N1 for
SetPointPS Display of actual communication
parameters.
speed = bit/s
D = number of data bits
P = parity: none, even, odd
S = number of stop bits
Set = An editable parameter (password needed)
Clr = Clearing to zero is possible
The communication parameters are set in the protocol specific menus. For the local port
command line interface the parameters are set in configuration menu.