AMC VersaTox, Инструкция по эксплуатации

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4.3.2 3 AND 4 WIRE DC POWER ONLY (OPTIONAL)
The figure below is an aid for wire selection. There are two variables that determine the
maximum cable length; wire gauge and power supply voltage. The graph contains 12 and
24VDC power supplies and a wire gauge range from 22 to 16 AWG. All the curves include a
safety margin of 0.5VDC. The user must take responsibility for the selection of wire gauge and
power supply voltage used as the values shown may not be suitable for all applications.
Note: The maximum 4-20mA length is much longer than the DC power wire lengths.
3 and 4 Wire Cable Selection
12V
24V
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
16 17 18 19 20 21 22
Wire Gauge (AWG)
C
a
bl
e
L
e
ng
th
(Fe
e
t)
Figure 4-16 3 and 4 Wire Cable Selection Graph
(Based & V
SM
= .5 V)
4.3.3 4 WIRE AC POWER ONLY (OPTIONAL)
The AC transformer must be employed with every AMC-VersaTox for proper operation. The
maximum wire length for 4-20mA is quite long and is not discussed in this manual.