42 Using in Safety Related Applications
WAGO-I/O-SYSTEM 750 XTR
750-537/040-000 8DO 24 VDC 0.5A Diagn XTR
Manual
Version 1.1.1
7
Using in Safety Related Applications
The 750-537/040-000 I/O module is suited for use in interference-free safety
circuits.
If the field side supply is shut down via a safety switching device, the safety
function of the module is not active.
When the interference-free I/O module is used correctly in a safety related
application, neither the SIL nor Performance Level achieved by the circuit nor the
category will be influenced.
This requires that you adhere to the following notes and connection diagrams!
1
Einsatz der rückwir kungsfrei en Digital ausg angskl emme in Sicher heitsanwendungen
7.1
Important Notes
Only operate interference-free I/O modules at a safe extra low voltage!
When using interference-free I/O modules, only use power supplies with
protective extra-low voltage (PELV/SELV) for the 24 VDC power supply.
Note maximum voltage!
Please note that a maximum voltage U
max
only can act on the reaction-free I/O
module in the event of a failure because irreparable damage could occur to the
module otherwise.
For the reaction-free I/O module , the field supply voltage is:
U
max
< 32 V
Note IP54 protection class!
IP54 protection class is absolutely mandatory. This means that the interference-
free digital output module shall only be integrated and operated in switch boxes
or switch cabinets complying with IP54 or higher.
Avoid reverse supply of output!
The 24 V power supply shall never be applied to the output of an interference-
free digital output module. This wiring failure will not be detected by the system.
