+ TX
–TX
–RX
+ RX
+ TX/RX
–TX/RX
+ TX
–TX
–RX
+ RX
+ TX
–TX
–RX
+ RX
5232
5232
5232
Other RS-
485 Device
Last station in network
may require terminations.
First station in network
may require terminations.
RS-485 network
4000 feet (1200 m)
maximum length
4.6 RS-485
Cable
This cable is used to connect from an RJ-45 based RS-485 port on the SCADAPack 32P controller to
other RS-485 devices. The cable has a RJ-45 connector on one end and stripped wires at the other
end. A 10-foot long cable is available from Control Microsystems as part number 297234.
RJ45 Function
Wire
color
Connect to Chassis
Shield
3 –Tx
Orange
6 +Tx
Blue
5 +Rx
Grey
2 –Rx
Brown
4 GND
Black
7
Do not connect.
Yellow
SCADAPack 32P Controller Hardware Manual
May 26, 2006
24