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Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
2-8
Table 2-1. Length of Annealed
Copper (cu) Wires
Table 2-2. Length of
Hand-drawn Copper (cu) Wires
Figure 2-4. Supply Current
versus Input Voltage
Types of Power
Supply Wires
Maximum Length of the Wire for Each
Corresponding Power Supply Source
Wire
Gauge
Annealed Cu
milliohms/ft
(milliohms/m)
42 V DC
Supply ft (m)
30 V DC
Supply ft (m)
20 V DC
Supply ft (m)
12.5 V DC
Supply ft (m)
20
0.01015
(0.033292)
1478
(451)
887
(270)
394
(120)
25
(8)
18
0.006385
(0.020943)
2349
(716)
1410
(430)
626
(191)
39
(12)
16
0.004016
(0.013172)
3735
(1139)
2241
(683)
996
(304)
62
(19)
14
0.002525
(0.008282)
5941
(1811)
3564
(1087)
1584
(483)
99
(30)
12
0.001588
(0.005209)
9446
(2880)
5668
(1728)
2519
(768)
157
(48)
10
0.000999
(0.003277)
15015
(4578)
9009
(2747)
4004
(1221)
250
(76)
Types of Power
Supply Wires
Maximum Length of the Wire for
Each Corresponding Power Supply Source
Wire
Gauge
Annealed Cu
milliohms/ft
(milliohms/m)
42 V DC
Supply ft (m)
30 V DC
Supply ft (m)
20 V DC
Supply ft (m)
12.5 V DC
Supply ft (m)
18
0.00664
(0.021779)
2259
(689)
1355
(413)
602
(184)
38
(11)
16
0.004176
(0.013697)
3592
(1095)
2155
(657)
958
(292)
60
(18)
14
0.002626
(0.008613)
5712
(1741)
3427
(1045)
1523
(464)
95
(29)
12
0.001652
(0.005419)
9080
(2768)
5448
(1661)
2421
(738)
151
(46)
10
0.01039
(0.003408)
14437
(4402)
8662
(2641)
3850
(1174)
241
(73)
1.0
0.8
0.6
0.4
0.2
0
0
10
20
30
40
50
Power Supply (Volts)
Sup
p
ly C
u
rrent (Am
p
s
)
Summary of Contents for 8712
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Page 26: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 2 16 ...
Page 84: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 4 46 ...
Page 102: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 5 18 ...
Page 114: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 6 12 ...
Page 154: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 D 6 ...
Page 194: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 E 40 ...
Page 208: ...Reference Manual 00809 0100 4664 Rev BA January 2010 Rosemount 8712 F 14 ...
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