BECKHOFF EL6930 - Manual (Page 41)

Operation
EL6930 39
4.2.10.1 EL6930 project design limits
TwinSAFE connections max. 127 (with 1 or 2 bytes safe user data per connection)
max. 50 connections per TwinSAFE group
Only 16 connections of an EL6930 can be slave connections.
PROFIsafe connections 1 PROFIsafe slave connection (must always be the first connection
in the configuration)
Supported hardware for EL6930
TwinSAFE connections EL1904 (all)
EL2904 (all)
EL2902 (all)
KL1904 (from 2008)
KL2904 (from 2008)
KL6904 as slave (from 2008)
AX5805 (all)
Safe data per connection up to 14 bytes safe user data (correspondingly lower total number
of connections)
TwinSAFE blocks 255 max.
TwinSAFE groups 32 max.
Standard PLC inputs dynamic up to 255-bit
Standard PLC outputs dynamic up to 255-bit
Note
TwinSAFE connection
Only one TwinSAFE connection between two TwinSAFE terminals is possible.
Between two EL6900/EL6930 logic terminals a connection can be set up that may
contain up to 14 bytes safe user data.