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Safety Manual
The JUMO EM series of protective devices listed in data sheets 602021 and 602026 monitors processes in
plants to check whether a measured value is exceeding or undershooting a set threshold.
The JUMO EM 602021 and 602026 have been type-tested by TÜV Süd Industrie Service GmbH according
to DIN EN 14597 and the B10d value certified according to DIN EN ISO 13849-1. This certification (see p. 3)
is valid for the models and features listed below:
Modes of operation:
Operating media:
The B
value is obtained by means of a check of breaking capacity 16 A, 230 V, resistive load, evaluated by
10d
TÜV Süd Industrie Service GmbH in line with DIN EN ISO 13849-1 (see p. 3), and confirmed with the
following values.
The B
value was checked at a switching frequency of 240 cycles per hour (4 cycles per minute) and
10d
according to the requirements of DIN EN 14597 for temperature controllers under maximum load.
The specification < 1 cycle per hour in the Declaration of Conformity reflects practical experience as well as
classification of the MTTF
For a mean operation time of 365 days per year and 24 hours per day and a B
following is obtained for the MTTF
1 per hour:
240 per hour (4 per minute):
Using the B
value to calculate the MTTF
10d
B
10d
MTTF
=
d
0,1× n
op
B
= Mean number of cycles before 10% of the test pieces
10d
have failed to danger.
MTTF
= Mean time to critical failure
d
n
= Mean number of annual actuations
op
d
= Mean operation time in days per year
op
h
= Mean operation time in hours per day
op
= Mean operation time before 10% failed to danger
T
10d
PL
= Performance Level
TB:
2B, 2F, 2H, 2L, 2P, 2V
STW(STB):
2B, 2K, 2L, 2N, 2P
STB:
2B, 2F, 2H, 2K, 2L, 2N, 2P, 2V
Water, air, oil
B
= 250,000
10d
< 1 cycle per hour
values as high in the sense of DIN EN 13849-1 when calculating the PL.
d
value at a switching frequency of:
d
285 years
1.2 years
d
d
× h
op
n
=
op
value according to DIN EN ISO 13849-1:
s
× 3600
op
h
t
cycles
value of 250,000, the
10d
B
10d
T
=
10d
n
op
[cycles]
[years]
[cycles/year]
[days/year]
[hours/day]
[years]
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