Safety engineering
Device modules
Connection of safety sensors
1
1.2
1.2.4
1.2-8
EDS94AYAD EN 2.2
1.2.4 Connection of safety sensors
1.2.4.1 General
The following applies to the sensors o f the SM300, version VA 1.xx:
ƒ Sensor type and function cannot be parameterised.
ƒ The sensor signals are converted into PROFIsafe bit information and
transmitted to the master control for processing. A local evaluation is
not carried out.
ƒ Unused sensor inputs must not be connected. The PROFIsafe bit of a
non-connected input is in the OFF state.
Note!
Make sure that an internal contact function test is carried out at
thesafeinputs:
Safe input in the ON state
ƒ ALOWlevelatone channel puts the input in the OFF state.
The discrepancy monitoring starts simultaneously.
ƒ A LOW level must be detected at both channels within the
discrepancy time, otherwise a discrepancy error will be
reported.
ƒ To be able to confirm the discrepancy error, a LOW level must
be detected before at both channels.
Safe input in the OFF state
ƒ A HIGH level at one channel starts the discrepancy monitoring.
ƒ A HIGH level must be detected at both channels within the
discrepancy time, otherwise a discrepancy error will be
reported.
ƒ To be able to confirm the discrepancy error, a HIGH level must
be detected before at both channels.
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