Operating Instructions
Safety Relay with IO-Link ESM-CB
16
(Translation of the original operating instructions) 2522722-01-05/19
8.4.
Notes about
Important!
Ì
For use and operation as per the
requirements
1)
, a power supply with the feature “for use in
class 2 circuits” must be used.
Alternative solutions must comply with the following requirements:
- Electrically isolated power supply unit with a max. open-circuit voltage of 30 V/DC and a limited
current of max. 8 A.
Ì
Use cable material made of copper with a temperature resistance of 60° C/75 °C.
1) Note on the scope of the UL approval: the devices have been tested as per the requirements of UL508 and CSA/ C22.2 no. 14 (protection against electric shock
and fire).
9. Application example
9.1.
Dual-channel monitoring of emergency-stop pushbutton and safety switch chain
with IO-Link
WARNING
Loss of functional safety
Ì
Make sure that the signaling device and the safety relay have the same ground potential.
Important!
Observe the information about applications with BR safety switches in the corresponding product
documentation.
Description of the application:
Ì
Dual-channel emergency-stop monitoring on sensor circuit S1
Ì
Dual-channel monitoring of the safety switch chain on sensor circuit S2
Ì
Manual, monitored start of the safety relay by start relay S1 (connection S21)
Ì
Monitoring of external, positively driven contactors in the start circuit at S21
Ì
IO-Link connection of the safety relay to the IO-Link master
Achievable safety integrity:
Ì
Suitable up to category 4, PL e (EN ISO 13849-1), SIL 3 (EN 62061)