Lenze ECS Série Instructions De Montage page 124

4 Electrical installation
Control terminals
Safe torque off
"Safe torque off" with safety PLC
The version "safe torque off" with safety PLC must ensure the function of the
multiple−contact switches. The following conditions must be met:
The NO contacts only close when the NC contacts are open.
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The voltage supply for the brake must be switched off safely in the event
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of LOW level at X6/SI1 and/or LOW level at X6/SI2.
The voltage supply for the output X6/SO must be switched off safely in
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the event of HIGH level at X6/SI1 and/or HIGH level at X6/SI2.
Safe processing of the output signal at X6/SO for higher level safety
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concepts.
The PLC must be programmed such that
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–
the input and output states of the output X6/SO are checked for
plausibility according to the following truth table.
–
the entire system will immediately change to a safe state when the
plausibility check results in an impermissible state.
States of the "safe torque off" function at the axis module
Level at input terminal
X6/SI1
LOW
LOW
HIGH
HIGH
All control components (switches, relays, PLC, ...) and the control cabinet
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must meet the requirements of EN ISO 13849. These include for instance:
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Switches, relays in enclosure IP54.
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Control cabinet in enclosure IP54.
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All other requirements can be found in EN ISO 13849.
Wiring with wire end ferrules is essential.
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All safety−relevant cables (e.g. control cable for the safety relay, feedback
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contact) outside the control cabinet must be protected, e.g. in the cable
duct. It must be ensured that short circuits between the individual cables
cannot occur! For further measures, see EN ISO 13849.
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Resulting level at
output terminal
X6/SI2 X6/SO
LOW HIGH
HIGH LOW
LOW LOW
HIGH LOW
l
Impermissible level at
output terminal
X6/SO
LOW
HIGH
EDKCSEX064 DE/EN/FR 4.0