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Appendix
Optional Serial Communications Adapter
Tools required:
• None
CAUTION
Procedure:
Turn off the circulator before installing the adapter. 
Adapter
1 2 3 4 5
5 4 3 2 1
RS-232 COMM 9 8 7 6
RS-485 COMM
6 7 8 9
Pin #
Function
Pin #
Function
1
No connection
1-7
No connection
2
TX 8
T+
3
RX 9
T-
4
No connection
5
GND = Signal ground
6 - 9
No connection
TX = Transmitted data from circulator
RX = Received data to circulator
1. If the circulator already has a communication cable installed, remove
the cable from the rear of the circulator and plug that cable into PORT
2 on the adapter.
2. Plug the supplied cable into PORT 1 on the adapter and the other end
into the circulator. Regardless of the configuration, the supplied cable
always goes from the circulator to PORT 1.
3. Plug the supplied serial communications cable into the communication
port on the adapter and then the other end into your computer.
4. If desired, use the supplied Velcro® tape to attach the adapter to a convenient location on the circulator.
6
Cole Parmer