Lenze E82EV 8200 - Manual (Page 125)

Electrical installation
Connection of relay output K
SR
5
l
125 EDK82EV113 DE/EN/FR 11.0
Connection of relay output K
SR
for safety function
Controller version x4x supports the "Safe torque off" (STO) safety function according to IEC
61800−5−2 (formerly "Safe standstill"), "Protection against unexpected start−up" according to the
requirements of performance level "PL d" of EN ISO 13849−1. Depending on the external wiring, up
to "PL d" according to EN ISO 13849−1 is reached.
)
Note!
The two independent "Pulse inhibit via safety relay K
SR
" and "Controller inhibit"
methods must be used for the "PL d" performance level according to EN ISO 13849−1 to
be complied with.
ƒ Only qualified personnel may install and commission the Safe torque off" function.
ƒ All control components (switches, relays, PLC, ...) and the control cabinet must comply with
the requirements of EN ISO 13849−1 and EN ISO 13849−2. This includes among other things:
– Control cabinet, switches, relays in enclosure IP54!
– All other requirements can be found in EN ISO 13849−1 and EN ISO 13849−2!
ƒ Wiring with insulated wire end ferrules or rigid cables is absolutely required.
ƒ All safety−relevant cables (e.g. control cable for the safety relay, feedback contact) outside the
control cabinet must be protected, e.g. by a cable duct. It must be ensured that short circuits
between the individual cables cannot occur!
ƒ With the Safe torque off" function no emergency stop can be effected without additional
measures:
– There is neither an electrical isolation between motor and controller nor a service or repair
switch!
– An "Emergency stop" requires the electrical isolation of the conductor to the motor, e.g. by
means of a central mains contactor with emergency stop wiring.
ƒ If in the case of the "Safe torque off" a force effect is to be expected from outside, (e.g.
sagging of hanging loads), additional measures are required (e.g. mechanical brakes).
ƒ After the installation the operator has to check the function of the "Safe torque off" circuit.
– The functional test must be repeated at regular intervals.
– Basically, the inspection intervals depend on the application, the related risk analysis, and
the overall system. The inspection intervals must not be longer than 1 year.