TR-Electronic CDH 75 M - 10 Appendix; Abbreviations and Terms Used

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12/13/2018 TR - ECE - BA - DGB - 0070 - 17 Page 107 of 108
10 Appendix
10.1 Abbreviations and terms used
CDH
Absolute encoder with redundant dual scanning,
hollow shaft design
CDV
Absolute encoder with redundant dual scanning,
solid shaft design
CD_
Absolute encoder with redundant dual scanning,
all designs
CRC
C
yclic
R
edundancy
C
heck
EU
E
uropean
U
nion
EMC
E
lectro
M
agnetic
C
ompatibility
ESD
E
lectro
S
tatic
D
ischarge
IEC
I
nternational
E
lectrotechnical
C
ommission
VDE
Association for Electrical, Electronic & Information Technologies
SIL
Safety Integrity Level: 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.
SIS
Safety Instrumented S
ystem: is used to protect a dangerous process
and reduce the risk of an accident. Process instrume
nts are a
constituent of a Safety Instrumented System. This comprises the
essential components of a complete safety-relevant process unit:
Sensor, fail-safe processing unit (control) and actuator
Functional
safety
Part of the overall system safety, which
depends on the correct
functioning of safety-
related systems for risk reduction. Functional
safety is ensured when each safety function is executed as specified.
SCS
S
afety
C
omputer
S
ystem with control function
SSI
S
ynchronous-
S
erial-
I
nterface
LSB
L
east
S
ignificant
B
it
MSB
M
ost
S
ignificant
B
it
T Period
t
M
SSI mono time
t
p
Pause time
t
D
Delay time
S Sign
0x Hexadecimal representation