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EGC/EGC-HD Toothed belt axes and spindle axes – Subject to change – 2012/07
Displacement encoder for monitoring the linear axis
Safety at a glance – Sensors and safety solutions
Reliable thanks to optional
sensing
• Inductive proximity sensor
SIES-8 M
• Flush mounting of up to
2 sensors in the profile slot –
no protruding edges outside
of the drive cross section
• Output status display:
2 yellow LEDs for improved
visibility, regardless of the
direction of approach
Features SIES-8M
• As normally open/normally
closed contact with switching
output PNP and NPN
• Switching distance 1.5 mm
• Repetition accuracy ±50 μm
(radial)
• Max. 10 m cable length
The slide position cannot be
monitored directly by the
encoder in the motor for safety
critical applications since if
there is a fault in the motor
encoder, a secondary system
is required to determine if the
axis slide is moving.
However, with an external
linear displacement encoder
mounted directly on the drive,
the axis slide position can be
monitored and the information
fed back to a safety system.
Functional safety
The Machinery Directive
2006/42/EC requires numerous
safety functions as protective
Motor controller CMM…
The safety function STO is
integrated as standard in all
motor controllers in the CMM...
series. This allows easy
implementation of the
emergency stop requirements
with safe stop SS1 up to
category 3, PLd. For higher
requirements, the series
CMMP-AS-…-M3 provides
optional safety modules for
safety functions up to category
4, PLe.
Safety system CMGA
Safely monitors command
input devices, safety sensors,
safety switches, encoders
and measuring systems and
processes their input signals
in order to guarantee the safe
status of a handling unit
through appropriate, safety-
oriented reactions.
measures for sufficient risk
reduction according to the
DIN EN 61800-5-2 and
EN 60204-1 standards.
Implementing these safety
functions in a practical
manner requires different
components that can easily
be integrated into an overall
concept.
• Incremental displacement
encoder for position detection
• Enhanced absolute accuracy
due to linear displacement
encoder
• Detection of all drive train
elasticity
• System-intrinsic inaccuracies
can be optimally adjusted by
the motor controller
• Minimum resolution: 2.5 μm
at a maximum 4 m/s
• Suitable for safety-oriented
applications (second channel)