Daktronics G-100-7.6-R - Manual (Page 19)

Electrical Installation 3-3
RS/422 System
Reference Drawings:
Shop Drawing, G-***-1-7x................................................................Drawing A-86943
System Riser; RS422...................................................................... Drawing A-92267
A RS/422 system requires a signal converter to connect the first sign to the computer.
1. Plug the serial cable’s 25 pin connector into the signal converter.
2. Plug either the 9 pin or the 25 pin connector (depending on your personal computer) into
the RS/232 COM port on the back of the computer.
3. Plug the signal converter’s power cord into a 120VAC grounded outlet.
4. Finally, plug a flipped phone cable into the “RS/422 OUT” of the signal converter and the
opposite end into the “RS/422 IN” of the first display of the system.
Modem System
Reference Drawings:
System Riser Diagram; Modem Drawing A-92570
A modem system uses an external modem and a standard phone line to connect the computer to
the sign. At the display, simply plug into a phone cable from the J-box into the jack labeled
“PHONE IN.” Refer to the modem’s manual for information on connection the modem to the
computer.
TCP/IP or LAN System
Reference Drawings:
System Riser Diagram; TCP/IP ......................................................Drawing A-95515
A LAN system requires a computer running on a LAN.
1. Connect the serial server to the LAN. The server has an RS/232 output just as a PC
would.
2. Follow the steps for the setup of a RS/232 system.
3.4
RS/422 Sign to Sign Connections
Reference Drawings:
System Riser; RS232..................................................................................Drawing A-92268
System Riser; RS422..................................................................................Drawing A-92267
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The sign to sign connections are the same for a RS/232 system and a RS/422 system.
When wiring a sign to sign network, the cable and connectors discussed earlier in this section are used.
Pay special attention to the information regarding flipped cables to help ensure a successful installation.
The best method of wiring the signs together is to start at the first sign, since it is designated to begin the
network.
Plug the cable into the “RS/422 OUT” output jack of the first sign and the other end of the cable into the
“RS4/22 IN” input jack of the next sign. Continue this procedure throughout the network. When the
wiring is complete, the last sign will have nothing in the output jack.