Wiring your analog channels, Minimizing electrical noise on analog channels – Rockwell Automation 1763-L16xxx MicroLogix 1100 Programmable Controllers Installation Instructions User Manual
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Publication 1763-IN001B-EN-P - September 2007
Wiring Your Analog Channels
Analog input circuits can monitor voltage signals and convert them to serial digital
data.
The controller does not provide loop power for analog inputs. Use a power supply
that matches the transmitter specifications as shown below.
Minimizing Electrical Noise on Analog Channels
Inputs on analog channels employ digital high-frequency filters that significantly
reduce the effects of electrical noise on input signals. However, because of the
variety of applications and environments where analog controllers are installed and
operated, it is impossible to ensure that all environmental noise will be removed by
the input filters.
IA
COM
IV1(+)
IV2(+)
Sensor 2
(V) Voltage
Sensor 1
(V) Voltage
IV1(+) or IV2(+)
IA COM
IV1(+) or IV2(+)
IA COM
+
-
+
-
+
-
IV1(+) or IV2(+)
IA COM
+
-
+
-
GND
+
-
Transmitter
Transmitter
Transmitter
Transmitter
Supply
Signal
Supply
Signal
Controller
Controller
Controller
Power
Supply
3-Wire Transmitter
4-Wire Transmitter
2-Wire Transmitter
Power
Supply
Power
Supply