Installation manual
Page 56 of204
The current status of the actuator is detected by correspondingly suitable auxiliary contacts or
position indicators and compared with the nominal status. Any deviation is thereby clearly
recognized.
Note: The DC depends on a single-channel or dual-channel diagnose as well as on the switching
frequency.
Testing the cutout ability for EAA1..40:
Once this function has been activated, the cutout ability of these outputs is cyclically tested.
Failure of the cutout possibility is clearly detected.
4.3.2.2 Overview DC with respect to the chosen diagnostics functions
Measure
DC
Note
Use
Monitoring of outputs b a
channel without dynamic
test.
0-90 % DC depending on switching
frequency
When using elements for
switching amplification external
relays or contactors) only
effective in connection with the
readback function of the
switching contacts
Monitoring of electro-
mechanical, pneumatic or
hydraulic actuators / outputs
Redundant cutout path with
monitoring one of the drive
elements
90 %
When using elements for
switching amplification external
relays or contactors) only
effective in connection with the
readback function of the
switching contacts
Monitoring of the outputs
with direct functions as
safety circuit or monitoring
of safety circuits with
elements for switching
amplification of pneumatic /
hydraulic control valves in
connection with readback
functions from their
switching status
Cross-comparison of input
signals with immediate and
intermediate results in the
logic (L) and temporal as
well as logic program
sequence monitoring and
detection of static failures
and short circuits (for
multiple inputs/outputs).
99 %
When using elements for
switching amplification external
relays or contactors) only
effective in connection with the
readback function of the
switching contacts
For applications with frequent
safety shut-down requests
these tests should be
performed more frequently,
e.g. at the beginning of the
shift, 1 x per week. However,
a test should at least be
carried out cyclically 1 x year.
Monitoring of the outputs
with direct functions as
safety circuit or monitoring
of safety circuits with
elements for switching
amplification of pneumatic /
hydraulic control valves in
connection with readback
functions from their
switching status
Summary of Contents for PSCBR-C-10 Series
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