Allen-Bradley MicroLogix 1100 Instrucciones De Instalación página 20

20 MicroLogix™ 1100 Programmable Controllers
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.
2-Wire Transmitter
+
Power
Supply
-
3-Wire Transmitter
+
Power
Supply
-
4-Wire Transmitter
+
Power
Supply
-
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.
Publication 1763-IN001A-MU-P - May 2005
IA
COM
Transmitter Transmitter
+ -
Transmitter
Supply Signal
GND
Transmitter
Supply Signal
+ +
-
-
Sensor 2
(V) Voltage
IV1(+) IV2(+)
Sensor 1
(V) Voltage
Controller
IV1(+) or IV2(+)
IA COM
Controller
IV1(+) or IV2(+)
IA COM
Controller
IV1(+) or IV2(+)
IA COM