Rockwell Automation 2706-P42R_P42C_P43R_P43C_P44R_P44C_P72CNx_P74CNx InView Marquee Message Display - Manual (Page 17)

Publication 2706-IN006E-EN-P
16 InView Marquee Message Display
P1 can be used for incoming RS-232 only, although it is optional
and not recommended.P1 is intended for RS-232 application
downloads and RS-485 terminating resistor connection. See
publication 2706-IN007 for more information on RS-485
termination.
9. Carefully close the front of the sign case and turn the
quarter-turn latches to the right with a large screwdriver.
TB1 - RS-232
1. GND 5. NC
2. NC 6. NC
3. RS-232 TX 7. NC
4. RS-232 RX 8. NC
Controller Board
1
2
3
4
5
6
7
8
TB1