Siemens 7SG11 Manual page 130

Hardware Release History
The Argus hardware is used in many different relays. The list of hardware revisions applying to Argus 1, up to and
including this document issue is:
Feb 2004 Additional model:
Mar 2002 Appearance change: modification to grey fascia design – logo, dark grey band, buttons and label.
Jan 2002 External change:
Jul 1999 Appearance change: introduction of grey fascia design to replace existing black fascia.
Jul 1999 External change:
Mar 1998 Additional features:
Apr 1997 Internal change:
Oct 1996 Additional features:
Nov 1995 First release
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4 pole variant with 3 status inputs and 5 output relays
SMA fibre-optic connectors replaced by ST
introduction of Epsilon case and terminal blocks
introduction of new expansion board (8SI).
introduction of additional memory
introduction of I/O expansion card (4SI+4OR).
7SG11 Argus 1 Diagrams and Parameters
TM
(BFOC/2.5) by default.