Lenze EVF9383 - Manual (Page 413)

Safety engineering
Important notes
11
11.1
l
11.1−1 EDSVF9383V EN 7.1−04/2012
11.1 Important notes
(
Stop!
In the case of the devices EVF9335 ... EVF9383 of variants V060,
V110, V270, and V300, the integrated brake transistor is
deactivated if the "Safe torque off" function is active.
The controllers support the safety functions "Safe torque off" (former
designation "Safe standstill"), "Protection against unexpected start−up", in
accordance with the requirements of control category 3 of ISO 13849−1
(former EN 954−1). Depending on the external interconnection, a standard
up to "category 3" in accordance with ISO 13849−1 is achieved.
)
Note!
In order to comply with control category 3 in accordance with
ISO 13849−1 (former EN 954−1), the two methods "Pulse inhibit
via safety relay K
SR
" and "Controller inhibit", which are
independent of each other, have to be used.
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).