Operating instructions

Function
Leuze electronic MSI-SR4 9
Start button monitoring during manual start
(see figure 3.1), (see figure 3.2), (see figure 3.3)
To detect static faults or blocking of the start button, the button function is monitored for signal changes.
Enabling occurs when the button is released (1/0 signal change). During automatic start (see e.g.
figures 3.4, 3.5), this function is deactivated.
Contactor monitoring (EDM) with manual start
(see figure 3.2)
For function monitoring of the external contactors, their NC contacts (K4, K5) are looped into start circuit
S35 with start button in series.
Contactor monitoring (EDM) with automatic start
(see figure 3.4)
For function monitoring of the external contactors, their NC contacts (K4, K5) are looped in between S34
and S35 in series.