System External Control; Systen Overload; Contactor Fault; System Underload - ABB ACH550 series User Manual

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Bypass Underload (20) [BYP UNDERLD]
If configured for Bypass Underload, the relay is energized when the bypass motor
underload level has fallen below the programmed protection setting. This output is
often used for broken belt indication. The Bypass Underload relay is de-energized
during normal operation.
PCB Overtemperature (21) [PCB OVERTMP]
If configured for PCB Overtemperature, the relay is energized when the temperature
of the bypass control, printed circuit board has exceeded the fixed protection setting.
The PCB Overtemperature relay is de-energized during normal operation.
System Underload (22) [SYS UNDERLD]
If configured for System Underload, the relay is energized when either the drive or
bypass motor underload level has fallen below the programmed protection setting.
This output is often used for broken belt indication. The System Underload relay is
de-energized during normal operation.
System Fault (23) [SYSTEM FLT]
If configured for System Fault, the relay is energized when either a drive/bypass fault
has occurred or the bypass motor overload/underload protection has tripped. The
System Fault relay is de-energized during normal operation.
System Fault/Alarm (24) [SYS FLT/ALM]
If configured for System Fault/Alarm, the relay is energized when either a drive/
bypass fault has occurred, the bypass motor overload/underload protection has
tripped or when a drive/bypass alarm condition is present. The System Fault/Alarm
relay is de-energized during normal operation.
System External Control (25) [SYS EXT CTL]
If configured for System External Control, the relay is energized when Auto is selected as
the control mode for the selected power source (Drive or Bypass). The System External
Control relay is de-energized when either Hand or Off is selected as the control mode for
the selected power source.
Systen Overload (26) [SYS OVERLD)
If configured for System Overload, the relay is energized when either the drive or bypass
motor overload level has risen above the programmed protection setting. This output is
often used for motor overload indication. The System Overload relay is de-energized
during normal operation.
Contactor Fault (27) [CONTACT FLT)]
If configured for Contactor Fault, the relay is energized when either a drive contactor/
bypass contactor fault has occurred. The Contactor Fault relay is de-energized during
normal operation.
Overview of Bypass Functionality
E-Clipse Bypass Configurations for ACH550 Drives