TR-Electronic CDH 75 M - Incremental Interface; SIN;COS Interface

Printed in the Federal Republic of Germany  TR-Electronic GmbH 2009, All Rights Reserved
12/13/2018 TR - ECE - BA - DGB - 0070 - 17 Page 93 of 108
5.6 Incremental interface / SIN/COS interface
In addition to the SSI interface for output of the absolute position, the measuring
system in the standard version also has an incremental interface.
However, this can alternatively also be designed as a SIN/COS interface.
This additional interface is not evaluated in relation to safety and must
not be used for safety-oriented purposes!
 The measuring system checks the outputs of this interface for the feed-
in of external voltages. In the event of voltages > 5.7 V, the measuring
system is switched off for safety reasons. In this state the measuring
system behaves as if it were not connected.
 The interface is generally used as position feedback fo
r motor control
applications.
Danger of damage to subsequent electronics due to overvoltages caused
by a missing ground reference point!
•
If the ground reference point is completely missing, e.g. 0 V of the power
supply not connected, voltages
equal to the supply voltage can occur at
the outputs of this interface.

It must be guaranteed that a ground reference point is present at all
times.
The signal characteristics of the two possible interfaces are shown below.