Rockwell Automation 1769-IF4 Compact (Series B or Later) Analog Input Module - Manual (Page 10)

10 Compact™ 1769-IF4 (Series B or Later) Analog Input Module
Publication 1769-IN048A-EN-P
• The 1769-IF4 module does not provide loop power for analog inputs.
Use a power supply that matches the input transmitter specifications.
• Differential analog inputs are more immune to noise than single-ended
analog inputs.
• Voltages on Vin+, V/Iin-, and Iin+ of the 1769-IF4 module must be
within ±10V dc of analog common.
External Power Switch
The 1769-IF4 (Series B or later) has an external 24V dc power switch which
gives you the option of using an external power supply. The switch is
located in on the lower left portion of the module’s circuit board, as shown
below. With this switch in the up position (default), 24V dc power is drawn
from the 1769 system power supply via the 1769 I/O bus. In the down
position, 24V dc power is drawn from the external power supply.
Wire the external power supply to the module via the module’s terminal
block. The external power supply must be rated Class 2, with a 24V dc
range of 20.4 to 26.4V dc and 60 mA minimum.
!
ATTENTION
Be careful when stripping wires. Wire fragments that fall
into a module could cause damage at power up. Once
wiring is complete, ensure the module is free of all metal
fragments.
External Power Switch
Bus Power (default)
External Power