Operation
Instruction handbook b maXX BM3000, BM3200, BM3300
Document no. 5.11018.11
153
of 218
8
The STO function of the devices
BM33XX-XXXX-XXXXX[-X]-XXXXX-S01/S02
complies with the following safety levels and standards:
m Characteristic data according IEC 61508-1 to 7 and IEC 62061
(data for use of the device as a subsystem in safety functions)
n Safety Integrity Level SIL CL 3
n PFH: 3.6 x 10
-10
1/h, corresponds to 0.4 % of SIL 3
n PFD
av
: 3.2 x 10
-5
corresponds to 3.2 % of SIL 3
n Proof Test interval 20 a
Remark: At a PFH value, which is < 1 % of the allowed SIL-threshold, the perfor-
mance of special Proof Tests within the mission time of the product is re-
garded as not necessary.
m Characteristic data according EN ISO 13849-1
n Performance Level PL e
n Category: Cat 4
n MTTFd: high (751 a)
n Diagnostic Coverage: high (99 %)
For further information call our application department.
8.5.3 Function
In case of a failure or on request (by activating an emergency stop device, interrupting a
safety light curtain), the STO function ensures that the power supply of the converter in
the power stage is shut down safely and the pulse inhibitor is activated. Thus, the motor
can no longer generate a rotating field. The mains supply is not disconnected from the
motor when the shut down function is activated.
The safety relay function is based on the fail-safe principle. The safety function STO „safe
torque off“ is active, as long as there is no voltage at the input terminals (X102). There-
fore, the functioning of the safety function is ensured at voltage failure, also. In order to
deactivate „safe torque off“, a voltage of 24 V must be applied to the terminals (X102).
The error „Shut down because of safety function“, error No. 1013 is generated if the
BM3300 is in state „Operation enabled“ and the voltage on the input of the STO function
is switched off.
The warning „Safety function“, warning No. 1046 is generated if the BM3300 is in another
state except „Operation enabled“ and the voltage on the input of the STO function is
switched off. The warning is reset as soon as the voltage is available again.
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