Eaton C440/XTOE - 24 Vdc Input Requirements; 24 Vdc Input Specifications

C440-COM-ADP Communication Module
12 C440/XTOE Electronic Overload Relay, DeviceNet MN04210002E—March 2011 www.eaton.com
24 Vdc Input Requirements
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 situations that require locally supplied input signal
voltage. To use the unisolated inputs tie the 24 Vdc ground/
common to the isolated common.
24 Vdc Inputs
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 diagrams. Any device using the
provided 24 Vdc input supply must have 500V
isolation from ground. Example devices include
pushbuttons.
24 Vdc Input Specifications
Example: Non Isolated 24 Vdc Input Source
Example: Isolated 24 Vdc Input Source
Specification Value
Number of inputs 4
Nominal voltage 24 Vdc
Nominal current 5 mA
Type Current sinking
Input type IEC 61131-2, type 1 digital
Maximum 24 Vdc source current 50 mA
Isolation voltage 250 Vac
V
dc
Vdc
Vdc
24 V
dc
24 V
dc
Example: Non isolated 24 Vdc input source.
In
p
ut source
p
ower is taken from
the 5 pin connector.
Connect C and 0V together.
Use 24 to source inuts.
–
–
–
24 Vdc
24 V
dc
24 V
dc
Example: Non isolated 24 Vdc input source.
The inputs must be supplied by an
external power source.
Do not connect the external su
pp
l
y
to terminals 0V and 24.
Connect isolated power source
between C and inputs.
C440 DeviceNet.book Page 12 Friday, March 25, 2011 10:41 AM
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