Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 37)

Chapter 4
Installing the DL50
4–12
The RS-232 interface allows connection of a single DL50 display, with a
maximum recommended cable length of 50 feet
.
Figure 4.9 shows the location of the DL50’s RS-232 port terminals. The
terminals are labeled:
RS-232 Connection Terminals
Terminal Number* Label Definition
1 T Transmit Line
2 R Receive Line
3 GND Signal Ground
* Pin #1 is on top.
Figure 4.9
RS-232 Terminal Location
G (Terminal #3)
R (Terminal #2)
T (Terminal #1)
RESET
RESET
RS-232 Connections