Benutzerhandbuch / User Manual - TR Electronic

General information
1.3 General functional description
The CDx-75 rotary measuring system is a safe and absolute Multi-Turn position
measuring system with PROFIBUS interface and PROFIsafe protocol.
The measuring system has primarily been designed for use in systems that require
safe position detection.
The safety measuring system consists of a redundant, two-channel system, in
which optical and magnetic scanning units are arranged on a drive shaft, designed
as a hollow shaft or solid shaft.
1.3.1 Main features
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PROFIBUS interface with PROFIsafe protocol, for transfer of a safe position and
speed
Quick process data channel via PROFIBUS, not safety-oriented
Additional SIN/COS or incremental interface, not safety-oriented
Two-channel scanning system, for generation of safe measured data through
internal channel comparison
– Channel 1, master system:
optical Single-Turn scanning via code disk with transmitted light and
magnetic Multi-Turn scanning
– Channel 2, inspection system:
magnetic Single and Multi-Turn scanning
A common drive shaft
Due to its technology the optical system possesses greater accuracy, therefore it is
used as master system. The data of the master system are unevaluated in the nonsafety-oriented
process data channel with normal PROFIBUS protocol, but are made
available with a short cycle time.
The magnetic scanning system serves for the internal safety check. The "safe data"
obtained through two-channel data comparison are packed into the PROFIsafe
protocol and also transmitted to the control via the PROFIBUS.
The SIN/COS interface, or the optionally available incremental interface, is derived
from the master system and is not evaluated in relation to safety.
© TR-Electronic GmbH 2010, All Rights Reserved Printed in the Federal Republic of Germany
Page 114 of 207 TR - ECE - BA - DGB - 0079 - 03 05/25/2011