Chapter 3—Installation and Wiring
42
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
USB Port
The USB port on the Base Control Module is a standard
Micro USB port. It supports the Modbus protocol and is
typically used to interface the Power Xpert
in
Control
Software Tool to the C445 Motor Management Relay for
configuration and monitoring. Since this port supports the
Modbus slave protocol, it will respond to Modbus commands
from any Modbus master connected to this port. All
parameters shown in the C445 Modbus Register Table in
Appendix E
can be accessed by the Software Tool or any
Modbus master.
When a Micro B cable is connected, this port acts as a serial
Modbus port with the following interface parameters:
19200 Baud, 8 bits/byte, Even Parity and 1 Stop Bit
The LED labeled “USB” above the USB port flashes green
when the port is connected and data is being transferred.
Test/Reset Button
There is a small indented push button on the front of the
Base Control Module that supports reset and Test Trip
functions as follows:
Factory Reset – This is a power up service. With the C445
powered down, press the button and hold it while applying
power. Continue to hold down the button for 5 seconds after
applying power.
Test Trip – This is a runtime service. With the C445 already
powered, press and hold the button for at least 5 seconds
and a Test Trip Fault will occur.
Fault Reset – This is a runtime service. With the C445 already
powered, press and hold the button for at least 0.5 seconds
to perform a fault reset.
RJ12 Ports
The two RJ12 ports on the bottom of the Base Control
Module are used to connect the Measurement Module and
the optional User Interface module, to create a complete
C445 Motor Management Relay system. RJ12 cables of
varying lengths are available for this purpose. Refer to
Table 3
on
Page
4
for part numbers and cable lengths.
When a Measurement Module and an optional User
Interface module are initially connected to the Base Control
Module, they are automatically accepted. Either RJ12 port
can be used for either module. After the C445 system is
initially connected, a fault will be generated by the Base
Control Module if the Measurement Module is moved to the
other RJ12 port on the Base Control Module while the
system is powered. This applies to the User Interface as
well. A fault reset must be sent to clear this fault. If the
modules are connected to different RJ12 ports while the
system is powered down, no faults will be generated upon
power up.
If one or both of the Measurement Module and User
Interface are removed while the system is powered up or
down and not plugged back into the Base Control Module, a
communication loss fault will be generated. If the removed
module is meant to be removed from the system
permanently, a “repair” service should be sent from the
Power Xpert
in
Control Software Tool. Following this, the
device will soft reset itself and the fault will be cleared,
resulting in a new system configuration without the removed
module. This really only applies to removing a User Interface
module since a Measurement Module is required.
Connecting a Measurement Module or User Interface
module with a different part number to the Base Control
Module while the system is powered will also result in a
fault. A fault reset will clear the fault. If the desire is to use
the new module, a “repair” service should be sent with the
Software Tool. If the new module was connected by
mistake, connect the correct module with the old part
number and send a fault reset. A soft reset always follows a
“repair” service.
Connecting a Measurement Module or User Interface
module with a different part number to the Base Control
Module while the system is powered down will result in a
fault when the system is re-powered. A “repair” service
should be sent if the desire is to use the module with the
new part number. If the new module was connected by
mistake, connect the module with the old part number and
issue a fault reset.
A fault reset can be issued from the following sources:
1.
By holding the small button on the front of the Base
Control Module down for at least 0.5 seconds while
the device is powered.
2.
From the Power Xpert
in
Control Software Tool.
3.
From any Modbus master to the USB port or the
RS-485 port.
4.
From a Modbus TCP master to the optional
Ethernet card.
5.
From an EtherNet/IP master to the optional
Ethernet card.
Measurement Module
1.
PTC Input
To utilize this optional feature, a Measurement Module
must first be purchased with this feature included from
the factory. This is not a field upgradable option.
Wire a compatible thermal detector, up to a 6 MARK A
type PTC thermal detector across the T1 an T2 terminals
of the 2-point connector on the Measurement Module.
There are no settings of any kind to make in the C445.
To make this PTC input a Trip or Warning, enable it as
such using the Power Xpert
in
Control Software Tool
under the Protections category.
