8
MicroLogix™ 1762-IQ8 DC Input Module
1762-IN004A-US-P
Input Wiring
Basic wiring
(1)
of input devices to the 1762-IQ8 is shown below.
A write-on label is provided with the module. Mark the identification of each
terminal with permanent ink, and slide the label back into the door.
(1)
Sinking/Sourcing Inputs - Sourcing/sinking describes the current flow between the I/O module and the
field device. Sourcing I/O circuits supply (source) current to sinking field devices. Sinking I/O circuits are
driven by a current sourcing field device. Field devices connected to the negative side (DC Common) of
the field power supply are sinking field devices. Field devices connected to the positive side (+V) of the
field supply are sourcing field devices.
!
ATTENTION: Be careful when stripping wires. Wire fragments
that fall into a module could cause damage when power is applied.
Once wiring is complete, ensure the module is free of all metal
fragments.
!
ATTENTION: Miswiring of the module to an AC power source
will damage the module.
IN 7
IN 5
IN 3
IN 1
DC
COM
IN 6
IN 4
IN 2
IN 0
24V dc
DC
COM
Commons are
connected internally.
+DC (sinking)
-DC (sourcing)
-DC (sinking)
+DC (sourcing)