Note: Following IEC 62061:2005, term 3.2.34.
MTTF
Refer to
"Mean time to failure (MTTFd)" on page 63
Network Time Expectation (NTE)
Maximum transmission time between producer and consumer
Passivation
If the safety module (F-periphery) detected an error, it switches the respec‐
tive channel or all channels of the module to the safe state. The channels are
passivated. The detected error is reported to the control.
In case of a safe input module, substitute values "0" are provided for the
safety program during passivation of the F-system instead of process values
present at the safe inputs.
In case of a safe output module, substitute values "0" are transferred to the
safe outputs during passivation of the F-system instead of output values pro‐
vided by the safety system.
Performance level PL
Discrete level specifying the ability of safety-related parts to perform a safety
function under predictable conditions.
PFH (Probability of dangerous fail‐
ure
Average probability of a dangerous failure in one hour (DIN EN 62061)
PL
Refer to
"Performance level PL" on page 64
Producer
Device sending safe data
Remaining risk
The residual risk is the risk remaining after the protection measures were tak‐
en following ISO 12100:2011, 3.13.
Risk
Combination of probability when the damage occurs and the extend of the
damage (ISO 12100:2011, 3.12).
Risk analysis
The risk analysis is the combination of the determination of the machine lim‐
its, the identification of the danger and the risk assessment (ISO 12100:2011,
3.15).
Risk assessment
Complete procedure covering a risk analysis and a risk evaluation (ISO
12100:2011, 3.17).
Risk evaluation
Evaluation based on the risk analysis whether the goals to minimize the risk
were achieved (ISO 12100:2011, 3.16).
Safety measures
Measure for the intended risk reduction
Example 1
Implemented by the designer: Inherent design, technical protection meas‐
ures, supplementing protection measures and user information.
Example 2
Implemented by the user: By organization (safe working procedure, supervi‐
sion, operating permit to perform works), provision and application of addi‐
tional protective devices (personal protective equipment, training).
Note: Following ISO 12100:2011, term 3.19.
SDID (Safety Device ID)
Safe device address in a network
Safety integrity level SIL
Discrete level (one of four possible levels) to specify the safety integrity of the
safety functions assigned to the E/E/PE safety-related system. The safety in‐
tegrity level 4 is the highest and 1 the lowest level (IEC 61508-4:2010, 3.5.8).
SNN (Safety Network Number)
Specifies the current physical network of the device.
Timeout
Waiting period before an error reaction is started.
TiMu (Timeout Multiplier)
Number of repetitions
TUNID (Target Unique Network
Identifier)
Unique network address of the safe communication partner
UNID (Unique Network Identifier)
Unique network address
Bosch Rexroth AG
DOK-CONTRL-S20*SSDO*8*-AP02-EN-P
64/85
IndraControl S20 Module With Safe Digital Outputs S20-SSDO-8/3
CSos glossary