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Help CenterDP820 3BSE013228R1 Digital Output Module of ABB S800 DCS System
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DP820 3BSE013228R1 Digital output module of ABB S800 DCS system
DP820 3BSE013228R1 Digital output module of ABB S800 DCS system
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The relay can be configured to store various data in a non-volatile memory, which
retains its data also in case of loss of auxiliary voltage (provided that the battery has
been inserted and is charged). Operation indication messages and LEDs, disturbance
recorder data, event codes and recorded data can all be configured to be stored in the
non-volatile memory whereas setting values and trip counters are always stored in
the EEPROM. The EEPROM does not require battery backup.
5.1.1.7. Self-supervision
The self-supervision system of the relay manages run-time fault situations and
informs the user about an existing fault. There are two types of fault indications;
internal relay fault (IRF) indications and warnings. Internal relay faults prevent relay
operation. Warnings are less severe faults and continued relay operation with full or
reduced functionality is allowed.
Internal relay fault (IRF)
When the self-supervision system detects a permanent internal relay fault, the green
indicator LED starts to flash. At the same time, the IRF contact (also referred to as
the IRF relay), which is normally picked up, drops off. The text INTERNAL FAULT
and a fault code appear on the display.
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