Printed in the Federal Republic of Germany
TR-Electronic GmbH 2022, All Rights Reserved
04/20/2022
TR-EMO-BA-GB-0023 v00
Page 7 of 35
1.2 Associated documentation
● Operator’s operating instructions specific to the system
● This safety manual
● Plug assignment
● Interface-specific user manual
● The customer-specific user manual (optional)
● Product data sheet, including dimensional drawing (depending on the drive variant)
1.3 Abbreviations and terms used
DC
avg
Average
D
iagnostic
C
overage
EMC
E
lectro-
M
agnetic
C
ompatibility
ESD
E
lectro
S
tatic
D
ischarge
Functional safety
Part of the overall system safety, which depends on the correct function-
ing of safety-related systems for risk reduction. Functional safety is en-
sured when each safety function is executed as specified.
IEC
International Electrotechnical Commission
ISO
I
nternational
S
tandard
O
rganization
MTTF
d
M
ean
T
ime
T
o
F
ailure,
d
angerous
Mean time until a dangerous error occurs
PFD
P
robability of
F
ailure on
D
emand
Probability of failure of a safety function
PFH
P
robability of
F
ailure per
H
our
Operating mode with high requirement rate or continuous demand. Prob-
ability of dangerous failure per hour.
PL
P
erformance
L
evel
: Discrete level, which specifies the capability of safety-
related parts of a control to execute a safety function under foreseeable
conditions.
SIL
S
afety
I
ntegrity
L
evel: Four discrete levels (SIL1 to SIL4). The higher the
SIL of a safety-related system, the lower the probability that the system
cannot execute the required safety functions.
VDE
V
erband
d
er
E
lektrotechnik, Elektronik und Informationstechnik (Associa-
tion for Electrical, Electronic and Information Technologies)
Repeat test (proof test)
Repetitive test to detect hidden dangerous failures in a safety-related sys-
tem.