Daktronics AF-3150-20-R,A - Manual (Page 31)

RS422
Reference Drawings:
System Riser Diagram, RS422 .................................... Drawing A-174135
Schematic, Internal, W/Quick Connect ........................ Drawing B-177662
An RS422 controlled display requires the use of signal converter near the computer.
From the signal converter, cable is run to the surge board assembly in the display or
to a junction box. The junction box has a quick connect plug, which will be
connected to the display. In either case, the cable from the signal converter to the
surge board must be routed though conduit. Do not run signal and display power
through the same conduit. Refer to
Figure 25 and Drawing A-174135 for system
layout.
1. If using a quick connect cable, terminate the 4-conductor shielded cable at
the signal converter, and to the surge board in the junction box. A quick
connect cable will then go to the RS422 middle jack (J32) on the back of
the primary display.
2. When connecting directly to the display, terminate one end at the signal
converter and the other end of the 4-conductor shielded cable to the 6-
position terminal block on the surge board labeled “RS422 IN” (TB1).
Drawing B-177662 and
Figure 26 below show the terminal block wiring.
3. The computer connects to the signal converter using a DB9 to DB25 serial
cable.
Figure 25: RS422 Display Layout
Electrical Installation
3-11