ABB Busch-Dimmer 6593 U-500 Manual Del Usuario página 38

Important Information ENG 38
The S and G lines shall be considered as internal
connecting lines and shall be kept as short as possible
(see Technical Data).
Capacity Expansion
When operated with power module 6594U-xxx (see Fig. 3),
the controlled outputs must be linked in order to
safeguardall the protective functions of the dimmer system.