10. Attach the display cable to a +12 V dc (green) powered-USB port at the rear of
the system unit, or attach the display cable to the RS-485 (number 4) port at
the rear of the system unit.
11. Install any other external options as required.
Notes:
a. Two displays can be stacked on a single post by inserting another head
assembly instead of the round top cover. Either display can face toward the
front or the rear.
b. For a second display, plug a second powered-USB cable into a +12-V dc
(green) powered-USB port on the rear of the system unit. You can attach
two RS-485 displays to a system unit with a Y-cable.
A
B
Figure 58. Attachment points for the display post
Updated October 31, 2007
Chapter 4. Installing external options 65
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