Eaton Moeller Series, Руководство пользователя

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9
10/12 MN04913001Z-EN
2 Engineering
Distinction from other
regulations The safety-related part of the CMD contactor monitoring
device's control system has EN/ISO 13849-1 approval. The
CMD is used for safety-related applications in machine
control systems. It has not been assigned to a SIL category
as per IEC/EN 61508. The system must be set up as per
IEC/EN 60204-1.
Performance Level The CMD contactor monitoring device can be used to set up
control systems that meet the requirements of performance
level (PL) "d" as per
EN/ISO 13849-1. The control system's setup meets the
requirements of category “3“ as per EN/ISO 13849-1.
In order to reach a PL of “d“, a common-cause failure (CCF)
analysis must be performed for the control system.
The control system must meet the requirements of one of the
following two combinations of the average diagnostic
coverage (DC
avg
) and the mean time to dangerous failure
(MTTF
d
):
• DC
avg
= low and MTTF
d
= medium to high,
or
• DC
avg
= medium and MTTF
d
= medium.
Control system of
category 3 The CMD contactor monitoring device can be used in combi-
nation with DOL starters or reversing starters. The sche-
matics are shown in section “Connection” (
a
page 15).