Chapter 5—System Configuration and Operation
64 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Pre-Defined Operation Modes
There are 12 selectable Operation modes for the C445. This
section describes the modes in detail. Selecting one of these
modes will determine the behavior of the relay’s inputs and
outputs.
Active Operation Mode
The Active Operation Mode parameter is used to select the
active mode. Any change to this parameter will require a soft
reset or power cycle before the new mode takes effect. The
following modes are supported:
●
Overload Only
●
Direct (FVNR)
●
Reverser (FVR)
●
Star/Delta
●
Two Speed Two Winding
●
Two Speed Dahlander
●
Auto Transformer
●
Solenoid Valve
●
MCCB Actuation
●
Contactor Feeder
●
General Purpose Input/Output
●
Stand Alone Ground Fault Module
Note: All Operation Modes require, as a minimum, a Base
Control Module and a Measurement Module except
“General Purpose Input/Output” and “Stand Alone
Ground Fault Module”. In the General Purpose I/O
mode, only a Base Control Module is required.
In Stand Alone Ground Fault Module mode, a
Base Control Module and a Ground Fault Module
are required.
2-Wire and 3-Wire Control Fieldwiring
The diagrams shown below for each operation mode show
the default 2-Wire control. Users can also choose to select
3-Wire Control, which will change how the input behavior is
defined if fieldwire is used as a local or remote control
source.
2-Wire: In 2-wire control, Input 1 is dedicated to accept a run
signal. The user is free to define their start stop logic as
required to send a run command to Input 1. It is common to
use a hand/off/auto switch to provide a maintained signal to
Input 1.
3-Wire: In 3-wire control, there is a dedicated start input and
a dedicated permissive (stop) input. If no signal is present at
the permissive input, the system will not be allowed to run. If
the permissive signal is removed while running, it will stop. If
the permissive signal is present and a signal is sent to the
start input, it will act as a run command. The start input can
be a maintained or momentary.
The 3-wire inputs are:
For Run1 only modes (all except Reverser and 2-Speed
modes): Input 1 is Start and Input 2 is permissive (stop).
For Run1/Run2 modes (Reverser and 2-Speed): 3-Wire
control is only allowed if fieldwire is the remote control
source. Inputs 1 and 2 are Start (Fwd/Rev and Fast/Slow) and
Input 3 is Permissive.
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