Allen-Bradley 1756-L6 Series, Reference Manual, Page: 51 / 134

Rockwell Automation Publication 1756-RM001I-EN-P - May 2012 51
ControlLogix I/O Modules Chapter 5
Wiring the Single-ended Input Module in Current Mode
Make sure you:
• review the considerations in Using Analog Input Modules on page 47 .
• use the correct documentation (listed in Additional Resources on page 10 )
to wire the module.
• place devices correctly in the current loop. You can locate other devices in
an input channel’s current loop anywhere as long as the current source can
provide sufficient voltage to accommodate all of the voltage drops (each
module input is 250 ohms)
Figure 23 shows how to wire the 1756-IF8 module for use in Current mode.
Figure 23 - ControlLogix Analog Input Module Wiring in Current Mode
Wiring the Thermocouple Input Module
Make sure you:
• review the considerations in Using Analog Input Modules on page 47 .
• use the correct documentation (listed in Additional Resources on page 10 )
to wire the module.
• wire to same input channel on both modules. When wiring
thermocouples, wire two in parallel to two modules. Use the same channel
on each module to make sure of consistent temperature readings.
Figure 24 on page 52 shows how to wire the 1756-IT6I module.
Current
Source A
Ch0 +
43369
Ch0 +
Ch0 – Ch0 –
Current
Source B
Allen-Bradley Motors