Andover Controls SCX 920 - Site Preparation and Layout

Hardware Installation
SCX 920 Installation Guide 9
Table 3 shows the maximum runs for wires of various gauges to keep
errors minimal when sensing temperatures up to 150°F.
Laying Out the Site Setup
You may want to draw a map of where you plan to put each controller
and store it in a notebook.
Find the tag attached to each controller that gives the number of the con-
troller. Before you remove any tags, be sure the tag has all of the
following information on it:
• Location of the controller.
• Serial number.
• Model name and number.
• Communications port the Infinet connects to on Infinity CX 9000.
Then collect the tags. You will need to know where your controllers are
located when you later assign a name to each controller and each input
and output.
Table 3. Wire Gauges and Corresponding Maximum Runs
for Sensing Temperatures Up to 150
°
F
Gauge
1
/
2
°
F Error
1
/
4
°
F Error
1
/
10
°
F Error
#14 4100 ft 2000 ft 800 ft
#16 2600 ft 1300 ft 500 ft
#18 1600 ft 800 ft 300 ft
#20 1000 ft 500 ft 200 ft
#22 650 ft 300 ft 130 ft
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