General information
TR-Electronic GmbH 2016, All Rights Reserved
Printed in the Federal Republic of Germany
Page 10 of 40
TR - ECE - BA - GB - 0120 - 13
10/23/2019
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 Variant 1 (IV58+FS01 SIN/COS, IH58+FS01 SIN/COS)
Incremental interface with analog output signals SIN±, COS± and Ref±; 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 processing unit an ideal error detection also occurs through evaluation of the
annulus relationship “SIN(x)
2
+ COS(x)
2
= 1”.
The Ref± reference signals are not evaluated from a safety viewpoint and may not be
used for safety-oriented purposes.
1.3.1.2 Variant 2 (IV58+FS01 TTL/HTL, IH58+FS01 TTL/HTL)
Incremental interface with digital square-wave output signals K1±, K2± and K0±;
output level in TTL or 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 internal signal monitor constantly checks the annulus relationship
"SIN(x)
2
+ COS(x)
2
= 1". Safety-relevant errors are indicated by switching of the signal
outputs to tri-state. The K0± reference 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:
– the scanning channel is single fault safe thanks to its own diagnostic
measures and circuit measures
– the control checks that the received incremental data meet the expected
tolerance window according to the application.
– for variant 1, the control also checks the annulus relationship
SIN(x)
2
+ COS(x)
2
= 1; if the result is outside the tolerance range, the
incremental data must be evaluated as unsafe. In this way the control
achieves an ideal error detection.
– when errors are detected the control 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 processing unit evaluates the measuring system
differentially
