Lenze 8200 vector series - Connection of Relay Output KSR for Safety Function

Electrical installation
Connection of relay output K
SR
5

157
EDK82EV903 DE/EN/FR 5.1
5.7 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.