Rockwell Automation 1746-FIO4V SLC 500 Fast Analog I/O/ User Manual - Manual (Page 20)

Publication 1746-UM009B-EN-P - September 2007
20 Install and Wire the Modules
Wiring Schematic for Single-ended Current-loop Analog Input Connections
9. Repeat steps 1…6 for each channel. For each unused input
channel, jumper together the plus (+), minus (–), and common
(ANL COM) terminals. For each unused output channel, do not
connect terminals.
Minimize Ground Loops To keep the ground-loop currents of input circuits to a minimum, we
recommend that you:
• use the same power supply to power both input channels of a
module.
• otherwise, tie together the grounds of separate power supplies.
See Wiring Schematic for Single-ended Current-loop Analog Input
Connections for more information.
IMPORTANT
Single-ended inputs are less immune to noise than are
differential inputs.
Important: The module does not provide loop power for analog inputs.
Use a power supply that matches the transmitter specifications.
Power
Supply
+
–
Power
Supply
+
–
Power
Supply
+
–
2-wire Transmitter
3-wire Transmitter
4-wire Transmitter
Transmitter
Signal Supply
GND
Transmitter
Signal Supply
+
–
Transmitter
+
–
+ – Module
IN +
IN –
ANL COM
Module
IN +
IN –
ANL COM
Module
IN +
IN –
ANL COM