Baumuller BM4400 - Safety Categories According to EN ISO 13849-1

Safe stop
Instruction handbook b maXX BM4400, BM4600, BM4700
Document No.: 5.12008.07 Baumüller Nürnberg GmbH
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of 358
C.3
C.3 Safe stop
C.3.1 Safety categories according to EN ISO 13849-1
Dependent on the possible dangers (these dangers are rated due to the consideration of the
severity of the injuries, the frequency of the length of stay within the danger area and the possi-
bilities to prevent dangers) safety-related components of machines must meet defined safety
criteria. The requirements to safety-based parts are divided into five categories in the standard
EN ISO 13849-1.
Category B requires basic requirements. Safety-approved components and principles in cate-
gory 1, additionally. In category 2 an error between inspection intervals can lead to a loss of the
safety function.
Category 3 complies with the level „the single-error-certainty to recognize errors partially”. The
safety-related components may not lead to a loss of safety function, if one single error occurs.
The errors are not all detected by the system, however. The accumulation of undetected errors
can lead to a loss of the safety function.
Category 4 complies with level „Self-monitoring”. This component detects possible errors.
These errors are reported in time. Therefore, the loss of the safety function is avoided.
The Baumüller converters of b maXX 4000 (BM4X3X-XX2, BM4X4X-XX2, BM4X5X-XX2,
BM4X6X-XX2, BM4X7X-XX2), which are operated with two safety relays (BM4XXX-XX2) op-
tionally, comply with the requirements of category 4 as well as with category 3 (EN ISO
13849-1) for the safety function „Safe stop“.
The Baumüller converters of b maXX 4000 (BM4X1X-XX1, BM4X2X-XX1, BM4X3X-XX1,
BM4X4X-XX1, BM4X5X-XX1, BM4X6X-XX1, BM4X7X-XX1), which are operated with one
safety relay (BM4XXX-XX1), comply with the requirements of category 3 (EN ISO 13849-1)
for the safety function „Safe stop“.