6
Installation
and Operation
EDBC250SIO | 2.0
179
Note, information
Use of safe inputs along with the mode selector mode
Two safe inputs are allocated to every test pulse output. If a mode selector is
used, you may still use inputs SI 4 and SI 12 (if available) with the associated test
pulse output (SI 0/4 TP / SI8/12 TP).
PLCopen module "Mode Selector" or a similar module of the safe control unit is used for multi-
channel analysis. The achievable category to EN ISO 13849-1 depends on the switching device's
error model (e.g. mode selector) and must needs be analysed in conjunction with the PLCopen
module's error detection.
Refer to section
►
7.4 Mode Selector, Rotary Table for connection examples.
Note, information
Time discrepancy in mode selector/rotary table mode
A set time discrepancy of 100 ms has been implemented for signals missing at
the inputs when changing to mode selector mode.
Electronic sensors, OSSD sensor
The OSSD sensor provides the fault detection function when connecting an OSSD sensors. De-
pending on the sensor's diagnostic functions, the retrieval of signals by the sensor itself is able
to detect cross-faults between the 24 V power supply and earth as well as cross-faults be-
tween the sensor signals.
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