Chapter 1—Power Xpert C445 Overview
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
7
Figure 9. Base Module Features and Connections—
Bottom View
Relay Outputs 1 & 2: Two normally open outputs.
Relay Output 3: Form C NC/NO. Factory orderable as latching
or non-latching.
Two options available: 120–240 Vac or 24 Vdc
RS-485: Modbus Serial terminal (factory orderable option
only)
CH1 Port: Provides communication and power from the Base
Control Module to the connected module (Measurement
Module or user interface)
CH2 Port: Provides connection and power from the Base
Control Module to the connected module (Measurement
Module or user interface)
Measurement Module Basic Overview
The Measurement Module is a pass-through device which
samples current and voltage data consumed by the system.
This data is continually transmitted back to the Base Control
Module for analysis. Various frame sizes are available for
applications up to 800 A, with factory orderable options for
voltage measurement and positive temperature coefficient
(PTC) protection.
Figure 10. Measurement Module Image
Measurement Module Features
●
0.3–136 A pass-through current measurement
●
External CTs for applications up to 800 A
●
Optional line voltage measurement and protection
●
Optional positive temperature coefficient (PTC) protection
●
DIN rail or panel mounting
●
The Measurement Module is powered through its cable
connection to the Base Control Module
Figure 11. Measurement Module Features and
Connections
Voltage Terminals: Optional Factory installed terminals for
measuring line voltage. Required for monitoring voltage,
power and energy and related protection features. Cannot be
installed in the field.
PTC Terminal: Optional factory installed terminal for Positive
Temperature Coefficient (PTC) protection. PTC protection
uses temperature measurement signals from the motors
stator windings. Cannot be installed in the field.
RJ-12 Terminal: Connection port to the Base Control Module.
Pass through current measurement: for measuring motor
lead current from 0.3 to 136 A.
Relay Outputs
1 & 2
RS-485
Input Power
CH1 Port
Relay
Output 3
CH2 Port
Measurement
Module Top
PTC Terminal
RJ-12 Terminal
Voltage Terminals
Measurement
Module Bottom
Pass through
current
measurement