Ach550 Drive Inputs And Outputs - ABB ACH550 User Manual

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Drive Fault
The Drive Fault relay is energized during normal operation. The Drive Fault relay is
de-energized when an ACH550 drive fault has occurred.
Hand/Off/Auto
The Hand/Off/Auto relay is energized when the bypass is in the Auto mode and de-
energized in the Hand mode and when the bypass is Off. In the Auto mode the
bypass start/stop command comes from the Start/Stop input terminal on the bypass
control board.
Digital Output
Safety Interlock
The Safety Interlock output is active when the Safety Interlock Input contact is
closed. The Safety Interlock output is available for customer connection and routing
through the ACH550 drive. User's can select from a variety of optional
communication protocols to monitor the Safety Interlock status through the ACH550
digital inputs. Refer to the ACH550-UH User's Manual and the appropriate
communications manual for additional information about monitoring ACH550 digital
inputs.

ACH550 Drive Inputs and Outputs

Some of the ACH550 inputs and outputs are pre-wired to the bypass control board
and not available for external use. The inputs and outputs that are not pre-wired are
available for external use by connecting directly to the terminals in the ACH550. The
pre-wired and available inputs and outputs are described below. Refer to the
ACH550-UH User's Manual for additional information about the inputs and outputs.
See also "Installation" for additional information and connection instructions.
The ACH550 has two relay outputs that are pre-wired to the bypass control board.
These two relay outputs are used to provide the System (Drive) Started and Drive
Fault outputs that are described above.
Two of the ACH550's digital inputs, the Auto Mode Start/Stop input and the Run
Enable input are also pre-wired to the bypass control board. These two digital inputs
are coordinated with the Start/Stop and Run Enable inputs that control the motor in
both the Drive and Bypass modes of operation.
Note! The E-Bypass will not work properly if the Drive relay outputs RO1 and RO3 or
the Drive digital inputs DI1 and DI2 are reassigned by changing ACH550
configuration settings. The only macro that, by default, provides the proper
configuration settings is the E-Bypass macro. If any other macro will be used, see
"The Bypass Application Macro" on page 32.
Four of the digital inputs of the ACH550 are available for routing E-Bypass outputs
(digital and relay outputs) through the ACH550 drive. Users can select from a variety
of communication protocols to monitor the E-Bypass status through the ACH550
digital inputs. The digital inputs of the ACH550 are also available for selecting
constant speeds or providing Speed Increase and Speed Decrease inputs. The
Start-up
E-Bypass Configurations for ACH550 Drives