Honeywell IAQPoint2 User Manual page 1277

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.
Voltage Source Applied
3-wire configuration
U31
1
J16
J17
-
+ +
+
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2/08
Permitted Impedance in the 4-20 mA Loop
12 Vdc
16 Vdc
20 Vdc
24 Vdc
30 Vdc
1 1 1 1
J19
J18 J20
- + - + - +
-
OUTPUT 1 - 8
+ + + +
DDC System
420I User Manual
Honeywell
4-20 mA Output Loop-powered Wiring
Total Impedance
1 1 1
J21
J22 J23
-
+ - + - +
+ + +
Wiring Details
400 Ohms
600 Ohms
800 Ohms
1000 Ohms
1300 Ohms
J12
J8
RC
P.U.
P.D.
R
- V
B A V
SHIELD
- -
DC Power Supply
+
+
17