Siemens PM330 Hardware Installation Manual page 125

Information about the application example
● The 3SK1 is externally supplied with 24 V DC through an SELV/PELV power source.
● The control of the PM330 is supplied from the integrated power supply.
-> electrical isolation between 3SK1 and PM330 possible, reason:
● STO inputs are optocoupler inputs
-> electrical isolation between the input circuit and evaluation electronics
● Feedback circuits are floating contacts
-> electrical isolation between the evaluation electronics and contact
● Separate voltage sources
-> 3SK1 and PM330 are supplied by 2 separate voltage sources
As a consequence, in the example above, the sensor circuit length is no longer relevant for
the PM330. The sensor circuit length is only defined by the restrictions relating to the 3SK1,
refer to the 3SK1 equipment manual.
The cable length between PM330 and 3SK1 must not exceed 30 m.
Settings
PM330:
CU230P-2:
3SK1111:
Display
Display in IOP or STARTER:
In IOP / STARTER, parameter r0002 is used as "Drive operating display".
Enable and inhibit signals as well as operating states are displayed here, e.g.:
● r0002 = [44] Switching on inhibited – connect 24 V to terminal STO (hardware)
– STO active in one or both STO channels
● r0002 = [31] Ready for switching on – set "ON/OFF1" = "1/0" (p0840)
– Drive is ready to switch on, the start signal is still missing
– An STO is not available at any STO input-> STO_A and STO_B have a 1 signal
Display on the 3SK1111:
The 3SK1111 has 2 LEDs to display the operating state, see the 3SK1 documentation.
Power Module PM330
Hardware Installation Manual, 12/2018, A5E32844552B AF
A.3 Application examples for functional safety (STO / SS1-t)
Activate the STO circuit, bring both activation switches S41 towards the front.
No settings are required in the CU230-2 for STO.
Set the switch to "Monitored" -> start using the start button if the application
requires this function.
Appendix
123