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General information
1.3.1 Main features
The entire system electronics has a discrete design. Neither microcontrollers nor
programmable logic elements are contained in the system electronics. There is no
interpolation or signal multiplexing. All signal lines are led separately within the
electronics.
1.3.1.1 PSEN enc sincos 4096 hs, PSEN enc sincos 4096 ss
Incremental interface with sinusoidal output signals A, /A, B, /B, Z, /Z; output level
1 Vss.
The safety-evaluated measuring system is designed for the implementation of safety-
related functions in relation to speed and direction of rotation. In the downstream fail-
safe evaluation device an ideal error detection also occurs through evaluation of the
magnitude "SIN(x)
The Z-, /Z-signals are not evaluated from a safety viewpoint and may not be used for
safety-oriented purposes.
1.3.1.2 PSEN enc HTL 1024 ss, PSEN enc HTL 1024 hs
Incremental interface with digital square-wave output signals A, /A, B, /B, Z, /Z; output
level in HTL logic.
The safety-evaluated measuring system is designed for the implementation of safety-
related functions in relation to speed and direction of rotation.
An
"SIN(x)
outputs to high impedance. The Z-, /Z-signals are not evaluated from a safety viewpoint
and may not be used for safety-oriented purposes.
1.3.2 Principle of the safety function
System safety results when:
Operating Manual PSEN enc sincos/HTL
1005022-EN-01
2
2
+ COS(x)
internal
signal
2
2
+ COS(x)
= 1". Safety-relevant errors are indicated by switching of the signal
–
the scanning channel is single fault safe thanks to its own diagnostic
measures and circuit measures
–
the evaluation device checks that the received incremental data meet the
expected tolerance window according to the application.
–
for PSEN enc sincos the evaluation device also checks the magnitude
2
2
SIN(x)
+ COS(x)
incremental data must be evaluated as unsafe. In this way the control
achieves an ideal error detection.
–
when errors are detected the evaluation device introduces appropriate
safety measures defined by the system manufacturer
–
the system manufacturer ensures, through correct mounting of the
measuring system, that the measuring system is always driven by the axis
to be measured and is not overloaded. A fault exclusion is required for
mounting the measuring system to the drive function.
–
the system manufacturer carries out a proven test during commissioning
–
the downstream fail-safe evaluation device evaluates the measuring system
differentially
= 1".
monitor
constantly
= 1; if the result is outside the tolerance range, the
checks
the
magnitude
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