Lenze E94AYAE SM301 - Manual (Page 34)

3 Safe configuration
3.7 Safe inputs
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Lenze · SM301 safety module · Parameter setting & configuration · DMS 2.3 EN · 11/2013 · TD05
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3.7 Safe inputs
General information
The following applies to the sensors of the SM301, version VA 1.00:
• The sensor type and function can be parameterised.
• A local evaluation is carried out if a corresponding parameter setting has been made.
• If a safety bus is activated, the sensor signals are sent as status information to the master
control.
• Deactivated sensor inputs must not be connected. The status of a non-connected input is in the
OFF state.
• If a signal is detected at a deactivated sensor input during initialisation, the drive remains
inhibited ( STO ).
• Faulty inputs are evaluated as OFF state.
The following applies to SM301 from V1.1:
If the "Safe cascading" safety function is active, the safe SD-In4 input is used as a cascading input
and can no longer be used as a universal input. For the cascading function, the SD-In4 input must be
parameterised as an active input for the "emergency stop" function.  Cascading (CAS) ( 57)

Tip!
Detailed information on the contact function test, the connection of passive/active sensors
and example circuits can be found in the manual for the safety module.

Note!
Make sure that an internal contact function test is carried out at the safe inputs:
• Safe input in the ON state
• A LOW level at one channel puts the input in the OFF state. The discrepancy
monitoring starts simultaneously.
• A LOW level must be detected at both channels within the discrepancy time,
otherwise a discrepancy error will be reported.
• To be able to confirm the discrepancy error, a LOW level must be detected before at
both channels.
• Safe input in the OFF state
• A HIGH level at one channel starts the discrepancy monitoring.
• A HIGH level must be detected at both channels within the discrepancy time,
otherwise a discrepancy error will be reported.
• To be able to confirm the discrepancy error, a HIGH level must be detected before
at both channels.