Table of Contents
Figure 4-4 Encoder connection detail
4.6
Connecting the proximity switch
Connection via the I/O interface on digital input E0.5
4.7
Combining different types of encoder
With regard to applications with encoder systems, please note that due to the
monitoring features implemented in the SI-Safety module range, it does not impose any
special requirements on the internal configuration of the encoder electronics, i.e. as a
rule, it is possible to work with standard sensors.
However, the following restrictions do apply:
Safety instructions
WARNING
•
SIN/COS encoder: The internal layout of the sensor system must be designed in
such a way that it enables output signals on both tracks to be generated
independently of one another, thereby eliminating the possibility of commonly
caused faults. Furthermore, the mechanical configuration must be verified, e.g.
mounting of the code disc to the shaft. Sensors with appropriate verifications and
test reports are available on the market.
•
Compact encoder with 2 x SSI or SSI + incremental: Here also verification is
required to ensure that the two inner encoder units are feedback free, including the
internal mechanical configuration.
•
When using just one encoder (e.g. compact sensor), the fault exclusion parameter
must be in place for 'shaft break / fault in the mechanical encoder connection'. To
this end, appropriate steps need to be taken, e.g. positive connection of the sensor
using groove-wedge or retaining pin.
40
SI-Safety Installation & Operating Manual
Issue Number: 1
Table of Contents
