EUCHNER CES-I-AR-U-C04 (Unicode) - Manual (Page 4)

Operating Instructions Safety Switch CES-I-AR-U-C04
4
Important!
Ì In the estimation of the PL for the overall system, a maximum value of 100
years can be assumed for the MTTF
d
according to the limit value in EN ISO
13849-1:2008, section 4.5.2. This corresponds to a minimum value for the
PFH
d
of 2.47x10 -8 /h.
Ì When up to 11 devices are connected in series, these limit values can be
assumed for the entire switch chain as a subsystem. As a subsystem, this
switch chain achieves PL e.
Ì In the case of series connection of more than 11 devices, the PFH
d
can be
calculated according to one of the stated methods in EN ISO 13849-1:2008,
section 4.5.1.
Ì If the simplified method according to section 6.3 of EN ISO 13849:2008-12
is used for validation, the Performance Level (PL) might be reduced when
more than 11 devices are connected in series.
Ì It is only allowed to use components that are permissible in accordance with
the table below.
Possible combinations for CES components
Safety switch
Actuator
CES-A-BBN-C04-115271 CES-A-BDN-06-104730
CES-I-AR-U-C04-...
Key to symbols Combination possible
Note!
The devices can be operated on an AR evaluation unit. Please refer to the operating
instructions for the relevant AR evaluation unit for more information.
Exclusion of liability and warranty
In case of failure to comply with the conditions for correct use stated above, or
if the safety instructions are not followed, or if any servicing is not performed as
required, liability will be excluded and the warranty void.