40 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Chapter 3 Wire Your Controller
Sinking and Sourcing Wiring
Diagrams
Any of the MicroLogix 1400 DC embedded input groups can be configured as
sinking or sourcing depending on how the DC COM is wired on the group.
1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA, 1766-
L32AWAA, 1766-L32BXBA Wiring Diagrams
Figure 13 - 1766-L32AWA/L32AWAA Input Wiring Diagram
(1)
(1) “NOT USED” terminals are not intended for use as connection points.
WARNING: The local programming terminal port is intended for temporary use only
and must not be connected or disconnected unless the area is free of ignitable
concentrations of flammable gases or vapors.
Type Definition
Sinking Input
The input energizes when high-level voltage is applied to the input terminal (active high).
Connect the power supply VDC (-) to the input group’s COM terminal.
Sourcing Input
The input energizes when low-level voltage is applied to the input terminal (active low).
Connect the power supply VDC (+) to the input group’s COM terminal.
ATTENTION: The 24V DC sensor power source must not be used to power output
circuits. It should only be used to power input devices (for example. sensors,
switches). See Master Control Relay
on page 23 for information on MCR wiring in
output circuits.
In Figure 13 to Figure 19, lower case alphabetic subscripts are appended to common-
terminal connections to indicate that different power sources may be used for
different isolated groups, if desired.
NOT
USED
NOT
USED
COM 0
L2a
L1a
IN0 IN1 IN2 IN3 COM 1
L2b
L1b
IN4 IN5 IN6 IN7 COM 2
L2c
L1c
IN8 IN9 IN10 IN11
COM 3
L2d
L1d
IN12 IN13 IN14 IN15 IN17 IN18 IN19IN16
COM
ANA
A
GND AIN0
IV0(+) IV1(+) IV2(+) IV3(+)
A
IN1 AIN2 AIN3
1766-L32AWAA only
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