SIEMENS
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Siemens NC 62 · 2016
5
SINAMICS S120 drive system
Encoder system connection
SME20/SME25 Sensor Modules External
■
Overview
SME20/SME25 Sensor Module External
SME20/SME25 Sensor Modules External are encoder evaluation
units for machine encoders (direct measuring systems).
The enclosures are designed with IP67 degree of protection.
This means that the units can be installed outside the control
cabinet near the machine encoder.
The following encoder signals can be evaluated:
•
Incremental encoder sin/cos 1 V
pp
without rotor position track
(C and D tracks)
•
Absolute encoder EnDat 2.1
•
SSI absolute encoder
1)
with incremental signals sin/cos 1 V
pp
(firmware V2.4 and later)
It is possible to connect a motor with a 17-pole circular encoder
connector to the 12-pole circular connector of the SME20 using
adapter cable 6FX8002-2CA88-...
•
KTY/PT1000/PTC temperature sensors can be used for motor
temperature evaluation (only possible with SME20).
•
The Sensor Module is only suitable for motors without absolute
track signals (C and D tracks), e.g.:
- Synchronous motors with pole position identification
(1FN, 1FW)
- Asynchronous motors (1PH)
SME20/SME25 Sensor Modules External evaluate the encoder
signals and convert the information obtained to DRIVE-CLiQ.
Neither motor nor encoder data are saved in the SME20/SME25.
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Design
SME20/SME25 Sensor Modules External feature the following
connections and interfaces as standard:
•
1 encoder connector via circular connector
•
1 DRIVE-CLiQ interface with integrated 24 V DC electronics
power supply from the Control Unit or Motor Module
•
1 PE connection
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Integration
SME20/SME25 Sensor Modules External communicate with a
Control Unit via DRIVE-CLiQ.
1)
For SME25, only SSI encoders with 5 V supply voltage.
© Siemens AG 2016