Rockwell Automation 865 Differential Protection Relay - Manual (Page 165)

Connections 9-5
865-UM001A-EN-P – July 2009
Auxiliary Voltage The external auxiliary voltage U
aux
(standard 40…865 V ac or dc) for
the terminal is connected to the terminals X3: 17-18.
NOTE: Polarity of the auxiliary voltage U aux (24 V ac, option B):
– = X3: 17 and + = X3: 18
The pin assignments of communication connectors including
internal communication converters are presented in the following
figures and tables.
Front Panel Connector
Figure 9.2 – Pin Numbering of front panel D9S Connector
Table 9.1 – Pin Numbering
Pin RS232 signal
1 Not connected
2 Rx in
3 Tx out
4 DTR out (+8 V)
5 GND
6 DSR in (activates this port and disables the X4 RS232 port)
7 RTS in (Internally connected to pin 8)
8 CTS out (Internally connected to pin 7)
9 No connected
NOTE: DSR must be connected to DTR to activate the front panel
connector and disable the rear panel X4 RS232 port. (The
other port in the same X4 connector will not be disabled.)
Rear Panel Connector X5 (REMOTE)
The X5 remote port communication connector options are shown
in Figures 9.3 through 9.6.
Without any internal options, X5 is a TTL port for external
converters. Some external converters are attached directly to the
rear panel and X5. Some other types may require various
TTL/RS-232 converter cables. The available accessories can be
ordered through your local Rockwell Automation distributor.
2&4-wire galvanically isolated RS-485 (Figure 9.4), Internal
options for fibre optic (Figure 9.5), and Profibus (Figure 9.6) are
available.
Serial Communication
Connectors