Fig. 38: 2 channel antivalent mode implemented in DX581-S
NOTICE!
2 channel equivalent and 2 channel antivalent modes are implemented in DI581-S and DX581-S
module to handle relatively static safety signals, e.g., those for emergency stop devices.
If frequently changing signals, like those from light curtains, laser scanners, door switches, etc. must
be handled by DI581-S and DX581-S, then it is highly recommended to configure related channels in
1 channel mode and do 2 channel equivalent and 2 channel antivalent evaluation at SM560-S Safety
CPU using PLCopen Safety FBs SF_Equivalent and SF_Antivalent (
Ä
Chapter 4.6.6.2 “SF_Equiva-
lent” on page 269 and
Ä
Chapter 4.6.6.3 “SF_Antivalent” on page 274).
DX581-S contains 8 safety digital output channels with the following features:
n Internal output channel tests can be switched off.
AC500-S Safety Modules
DX581-S digital safety input/output module > Functionality
30.03.2017 AC500-S 111
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