Figure 55. Control User Interface Digital Inputs; Figure 56. Control User Interface Input Connector Wiring - Eaton Power Xpert C445 User Manual

Chapter 3—Installation and Wiring
Control User Interface
1. Input Connector
The connector on the Control User Interface is used for
four 24 Vdc digital inputs. These inputs may be used as
general purpose inputs. The state of these inputs is
contained in the "Digital Input Status" Modbus register.
They can be monitored by the system controller via any
of the supported fieldbus networks.

Figure 55. Control User Interface Digital Inputs

1 2 3 4
5 6 7 8
Pin # Description
1 24V Source for Inputs
2 24V Source for Inputs
3 24V Source for Inputs
4 24V Source for Inputs
5 Input 1
6 Input 2
7 Input 3
8 Input 4
These inputs should only be used to monitor inputs from
sources inside the same panel as the Control User Interface
module they're wired to. The reason for this is that the
24 Vdc source for these inputs is also on the 8-position
connector with the four inputs. Long runs outside of the
panel are not recommended.
Some examples for the inputs on the Control User
Interface are:
Circuit Breaker On/Off status
●
Circuit Breaker tripped
●
AUX contact on the contactor
●
Panel temperature switch
●
44 Power Xpert C445 Global Motor Management Relay MN042003EN—October 2016 www.eaton.com
Below is a diagram showing the function of each of the
8 pins on the Input connector.

Figure 56. Control User Interface Input Connector Wiring

2. USB Port
The USB port is a standard Micro USB port. It supports the
Modbus protocol and is typically used to interface the Power
Xpert inControl 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