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34020113EN/AA - Page 29
6. Appendix
6.3 Glossary
Alternate source Backup source that steps in if the preferred source fails.
JBUS communication card Internal card implementing the JBus protocol on a serial link to supply the user with
system information.
Load Device(s) or system(s) connected the Upsilon STS output.
Manual bypass Q1BP, Q3 and Q2BP switches, accessible to the user, that may be used to directly
supply the load from Source S1 or S2. The bypass enables servicing on the equipment
without interrupting the supply of power to the load.
Normal mode Operating mode during which the load is supplied by the preferred source.
Preferred source Source selected as the normal source of power.
Relay communication card Internal card implementing contacts to supply the user with system information.
Static switch Electronic switch ensuring instantaneous switching.