Cleco mPro300GCD-STO Serie Descripción Del Hardware página 17

Fig. 1-3 STO circuit design
8.2 Diagnostic Coverage (DC)
The Diagnostic Coverage depends on the inclusion of the integrated safety function for the controller into the controller
chain, as well as the implemented measures for the diagnostics. If a fault is detected during the diagnostics, suitable
measures must be provided to maintain the safety level.
8.3 Interfaces
The STO safety function for the controller is controlled via the digital I/O interfaces X41, X42. The interfaces for all con-
trollers with the STO function are designated the same, highlighted in yellow and functionally identical with the same
specifications, see chapter 6 Pin Assignment, page 12.
The STO safety function is requested exclusively via the two digital control inputs STO-A and STO-B. Another connec-
tion of the signals, e.g,. feedback or auxiliary voltage, is not absolutely required.
Note
Cross-connection detection of the input circuit is not performed by the controller.
All system components allow the short circuit fault exclusion.
The state of the STO safety function is reported back via a potential-free feedback contact (closer). This information is
linked in a successive circuit of several controllers with the STO function.
Interface port X41 – IN
Depending on the position of the currently considered control in the STO line (see chapter System Layout, page 118),
the interface port X41 is the connection to the previous controller or to the external safety relay.)
By providing an auxiliary power supply of 24 VDC in connector X41, it is possible to supply the voltage to safety relays
for normally open contacts, or similar.
Apex Tool Group P2552HW | REV D l 2023-12
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