Lenze ECSCAxxx - Manual (Page 82)

Electrical installation
Control terminals
Safe torque off
5
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82 EDBCSXA064 EN 3.2
5.3.3.3 Important notes
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Danger!
When using the "safe torque off" function, additional measures are required
for "emergency stops"!
There is neither an electrical isolation between motor and axis module nor a
"service" or "repair switch".
Possible consequences:
ƒ Death or severe injuries
ƒ Destruction or damage of the machine/drive
Protective measures:
An "emergency stop" requires the electrical isolation of the motor cable, e.g.
by means of a central mains contactor with emergency stop wiring.
Installation/commissioning
ƒ The "safe torque off" function must only be installed and commissioned by qualified
personnel.
ƒ All control components (switches, relays, PLC, ...) and the control cabinet must meet
the requirements of EN ISO 13849. These include for instance:
– Switches, relays in enclosure IP54.
– Control cabinet in enclosure IP54.
– All other requirements can be found in EN ISO 13849.
ƒ Wiring with insulated wire end ferrules is essential.
ƒ All safety−relevant cables (e.g. control cable for the safety relay, feedback 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.
ƒ If force effects from outside (e.g. sagging of hanging loads) are to be expected when
the "safe torque off" function is active, additional measures have to be taken (e.g.
mechanical brakes).
During operation
ƒ After installation, the operator must check the "safe torque off" function.
ƒ The function check must be repeated at regular intervals, but no later than after one
year.