Chapter 5—System Configuration and Operation
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
63
Chapter 5—System Configuration and Operation
Control Sources
Types
The C445 can be operated from either a Local or a Remote
control source. There are four options for the Local Control
Source:
●
Auto detect User Interface
●
No Local Control
●
User Interface Control
●
Fieldwire Control
Auto detect User Interface—By default the local control
source is set to the “Auto detect User Interface” selection.
In this selection, if a User Interface with control buttons is
connected, the User Interface will be the Local Control
Source.
User Interface Control—User Interface will be the Local
Control Source. If a Status only User Interface without
control buttons is connected or if no User Interface is
connected at all, the system will remain inhibited.
Fieldwire Control—The Fieldwire will act as the Local Control
Source.
Page 67
displays the wiring options for all modes.
There are three options for the remote control source:
●
No remote control source
●
Fieldbus
●
Fieldwire
●
Logic Engine
No remote control source—Remote Control is not allowed
under any condition.
Fieldbus—Fieldbus will be the Remote Control source if the
Active Control Source is Remote.
Fieldwire—Fieldwire will be the remote control source if the
Active Control Source is Remote. This selection cannot be
used if the Fieldwire is already selected as a local control
source. The default wiring method is 2-wire control. 3-wire
control is an option. Wiring options for all modes are shown
later in this chapter.
Active Control Source
The C445 system can have only one active control source at
any given point of time. At power up, the control source is
determined by the local/remote power up mode setting,
which can be set to either remote control, local control or
hold last control state. By default the setting is set to hold
last control state and out of the box local control will be
source of control. The current active control source can be
determined by reading the active control source parameter.
Switching Between Local and Remote
Local to Remote
When the active control source is local, the following actions
will change the active control source to Remote control:
1.
Pressing the AUTO button on the User Interface if User
Interface is the local control.
2.
Setting the REMOTE input on the Fieldwire if the
Fieldwire is used as the local control.
3.
Setting the Local Control Source to No local Control and
the Remote Control Source is not set to No remote
control source.
After switching to Remote control, the Remote control
source is determined by the Remote Control Source
parameter.
Remote to Local
When the active control source is remote, the following
actions will change the active control source to Local control:
1.
Pressing any button on the User Interface except the
AUTO and the Reset button.
2.
Clearing the REMOTE input on the Fieldwire if the
Fieldwire is used as the local control.
After switching to Local control, the Local control source is
determined by the Local Control Source parameter.
Note:
The Remote Control source can optionally be configured
to control the mode. Refer to
Appendix C
for more
information.
