SEW-Eurodrive MOVIPRO PHE Series, Руководство по эксплуатации, Страница: 18 / 100

3
Functional safety
Integrated safety technology
Operating Instructions – MOVIPRO
®
PHE..B-A15-.1X0..B-00
18
3.1.5 Limitations
• The brake control integrated in this device and the standard brake integrated in
brakemotors are not safety-related and therefore not part of the safety functions
described in chapter "Drive safety functions". If the brake controller and/or the mo-
tor brake fails, the drive can coast for much longer depending on the application
(i.e. the friction and inertia of the system). In case of regenerative loads (e.g. lifting
axes, declining conveying lines), the drive can even accelerate. This must be
taken into account for a risk analysis of the system/machine. Additional safety
measures might have to be implemented (e.g. safety brake system).
– The device must not be used without an additional brake system for applica-
tion-specific safety functions that require active deceleration (braking) of the
dangerous movement.
• When using the SS1(c) function as described in chapter "Drive safety functions",
the brake ramp of the drive is not monitored with respect to safety. In case of a
fault, the drive might not be decelerated after the delay time, or it might be acceler-
ated in the worst case. In this case, the "STO function" (→
2
16) is only activated
after the set time delay has passed. The resulting danger must be taken into ac-
count for the risk analysis of the system/machine. Additional safety measures
might have to be implemented.
• The system/machine manufacturer must perform a system/machine-specific risk
analysis. The use of the device must be taken into account.
• The safety concept is only suitable for performing mechanical work on driven sys-
tem/machine components.
• If the 24 V supply voltage is disconnected, the supply voltage is still present at the
frequency inverter DC link.
• To perform work on the electrical section of the drive system, the supply voltage
must be disconnected using an external maintenance switch.
INFORMATION
There is no galvanic isolation when the STO safety function is activated. This means
it is not protected against electrical shock. This is the reason why the STO safety
function cannot be used to implement an emergency off device in terms of normative
requirements. For this purpose, the entire system must be switched off by means of a
line disconnector.
23576855/EN – 10/2017