Connections and Switch Settings
C441 PROFIBUS Module User Manual MN042002EN—July 2015 www.eaton.com 11
Power and I/O Wiring Diagrams for the C441Q
and C441S Modules
The C441Q module contains four 24 Vdc inputs and two
relay outputs. The two relay outputs provided are one
form A (NO) and one form C (NO, NC).
24 Vdc Inputs
The 24 Vdc input circuit is capable of both isolated and
unisolated behavior. The isolated inputs share a single
common tie point. A 24 Vdc current limited source/ground is
provided in the situations that require locally supplied input
signal voltage. To use the unisolated inputs, tie the 24 Vdc
ground/common to the isolated common.
Figure 9. C441Q: 24 Vdc Wiring Diagram
Note: Do not connect a 24 Vdc source to pins 6 and 7. The
“I/O Power: 24 Vdc” is to be used only in conjunction
with the inputs. It is a 24 Vdc output intended to only
supply signal power for the inputs. When using the
24 Vdc input supply, pin 6 should only be connected to
pin 5 (24 Vdc input supply common to input common).
See example wiring diagram above. Any device using
the provided 24 Vdc input supply must have 500 V
isolation from ground. Example devices include
pushbuttons and auxiliary contacts.
Pin 1
Pin 12
NET
24 Vdc
+
-
+
I1
I2
I3
I4
C
NO
NO
NC
I1
I2
I3
I4
C
C
Q1
NO
Pin 1
24 Vdc
Pin 12
NET
+
-
+
0V
+
-
24
Example: Isolated 24 Vdc Input Source
- The inputs must be supplied by an
external power source.
- Do not connect the external supply to
terminals 0V and 24.
- Connect isolated power source between
C and Inputs.
Example: Non-Isolated 24 Vdc Input Source
- Input source power is taken from the 5-pin
connector.
- Connect C and 0V together.
- Use 24 to source inputs.
24 Vdc
24 Vdc
I/O Power
AC/DC
AC/DC
24 Vdc
AC/DC
AC/DC
C
Q1
Q2
Q2
I1
I2
I3
I4
C
NO
NO
NC
I1
I2
I3
I4
C
C
Q1
NO
0V
+
-
24
C
Q1
Q2
Q2
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