IC-ME Datasheet, PDF (7/11 Pages) IC-Haus GmbH – DUAL LIGHT-GRID PULSE RECEIVER

iC-ME
DUAL LIGHT-GRID PULSE RECEIVER
INPUT SAFETY SWITCH
preliminary
Rev A1, Page 7/11
The FMEA driven schematic design and layout topol-
ogy of the iC-ME ensures maximum safety and allows
the utilisation of an input safety switch.
or results in a safe state. Likewise external single fail-
ures (e.g. shortcircuit of PD0 to PD1) are safe or de-
tectable even during an internal single failure.
Figure 5 shows the schematic of the input safety
switch. Given this particular topology in addition to the
redundant layout (e.g. of ground switches) any single
fault can either be detected by the evaluation circuitry
Due to the redundancy of the layout, a ground break-
age or a simultainous failure of the bypass switches is
practically impossible.
Figure 5: Input safety switch