Leuze electronic
MSI-TB
12
After switching on the safety relay via the start input, the functional capability of the connected safety
sensors is cyclically monitored every two seconds.
The potential-free safety relay outputs directly send the signal for shutting down a dangerous movement.
Further integrated functions are listed in the following table.
Table 4.1:
Functions of the different versions
The start/restart interlock prevents automatic start-up of the system (e.g. if the protective field is again clear
or if an interruption in the voltage supply is restored). The operating personnel must make certain that no
people are present in the danger zone before the system is manually re-enabled.
The default factory setting for this function is active.
The safety relay monitors the feedback circuits of connected contactors. The signal at the EDM input is
compared to the state of the OSSDs. While the OSSDs are switched on, the feedback circuit is open (high-
impedance); while the OSSDs are switched off, 24 V is applied to the EDM input.
The reaction at the EDM input with respect to the OSSDs is delayed by maximum 500 ms.
With the MSI-TSB variant, terminal 7 is used for the STOP1 function. The system switches on following an
interruption of the protective field. OSSD and SSD switch off with a delay of 600 ms.
Periodic function test
Start/restart interlock selectable
Contactor monitoring (EDM) selectable
Indication output Safety ON
Indication output STOP1
Indication output Error
