Intec Controls IVA-420I, Руководство пользователя

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2/07
Wiring Details
4-20 mA Output Loop-powered Wiring
4-20 mA Output Loop-powered Wiring
(Factory Setting)
The 4-20 mA output is factory set for loop-powered operation and
requires a power source of 12 Vdc to 30 Vdc. The overall permitted
impedance depends on the voltage supplied at the 4-20 mA loop. To
enable this configuration, the three jumpers must be placed on
positions 2-3, 4-5 and 6-7 at distinct outputs J16 through J23.
Permitted Impedance in the 4-20 mA Loop
3-wire configuration
Voltage Source Applied Total Impedance
12 Vdc 400 Ohms
16 Vdc 600 Ohms
20 Vdc 800 Ohms
24 Vdc 1000 Ohms
30 Vdc 1300 Ohms
DDC System
+ + + + + + + + -
DC Power Supply
- +
V A B
1 1 1 1 1 1 1 1
- + - + - + - +
-
+
-
+ - + - +
P.U.
P.D.
RC
R E.
O
.L
.
SHIELD
OUTPUT 1 - 8
+ - V
U3
8
U3
7
U3
6
U3
5
U3
4 U3
3
U3
2
U31
S9
S8 S7 S6 S5 S4 S3 S2
J8
J1
5
J23 J22
J21
J20
J19
J18 J17
J16
J12
IVA-420I User Manual