Daktronics KE-1010-7.6-RG - Manual (Page 22)

Figure 13: Shift Board
3.5 Master to Master Connections
Most displays systems will consist of a master display or a master and one or more
echo displays. In those cases when there is more than one master display, signal can
be transmitted between master displays using a flipped, 6-conductor RJ11, cable.
The signal into the first display can be either RS422 or Ethernet. The signal
connection between displays will be connected from the RS422 OUT on the first
display to the RS422 IN on the second display. (See Section 3.1 for descriptions and
methods for making flipped cables.)
Figure 14: Master-Master RS422 Connection
Electrical Installation 3-6