Daktronics Labelle GL100 - Manual

ED-8722
DAKTRONICS, INC. Networking Displays

HSSI* Remote Echo RDT ReaderBoard Network
The HSSI network is used when two or more displays must run synchronized messages. Master / Remote
Echo display connection, using Belden #8142 (25 conductor cable), runs from the DB25 ACCESSORY OUT
port on the Master to the DB25 ACCESSORY IN port on the first remote Echo board. The cable for the next
remote’s ACCESSORY IN port, etc. A DB25 terminator plug is required at the ACCESSORY OUT port of
the last Echo display. Refer to the attached PIN-OUT DIAGRAM and RDT NETWORK DIAGRAMS.
*High Speed Serial Interface (U.S. patent #4551720)

PC-Controlled Multiple Master RDT Readerboard Network
The two types of RDT networks described below are uni-direction; all information is sent from a PC to the
individually addressable RDT displays in the network.

Linear Configuration: The PC connects to an RS232:422 Transmitter (part number CDP8000-10-113);
use Belden #9271 between the Transmitter and the first RDT’s RS422:232 Receiver. Each master RDT
must have its own receiver, with each Receiver wired to the next in line using Belden #9271. A 120 Ohm
terminating resistor is required at the last RS422:232 receiver in the network. Refer to the attached RDT
NETWORK INSTALLATION DIAGRAM.

“Star” or Multiple “Leg” Configuration: The PC connects first to an RS232:422 Transmitter, which
connects to an RS422 Network Expander. This Expander, which acts like four additional Rs232:422
Transmitters, is designed to be wired to RS422:232Receivers attached to master readerboards. Each
Expander can be wired to another Expander to create additional “legs.” 120 Ohm terminating resistors
are required at the last Receiver in each “leg.” See the RDT INSTALLATION or RS422 NETWORK
EXPANDER DIAGRAMS.
DAKTRONICS, INC.
Setting New Standards Worldwide
P.O. Box 5128 331 32 nd Ave. Brookings, SD 57006
Phone (605)697-4400 or (800) 843-9879 Fax 697-4444