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Electrical installation
Festo – GDCP-CMMD-AS-HW-EN – 1404NH – English
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The shaft encoder mounted on the motor shaft is used for commutation of a 3-phase synchronous
motor and as an actual-value recorder for the built-in speed and position controller. The following en-
coders are supported depending on the motor type:
–
Absolute encoder (single-turn, multi-turn)
–
Digital EnDat 2.1 or 2.2 interface, digital angle information only (analogue SIN-COS signals from the
encoders are not supported)
–
Maximum current consumption of 200 mA.
Supply voltage for the encoders is taken from the in5 V logic supply. The supply voltage toler-
ance is limited downwards. Voltage drops on the connecting cable are not compensated.
Use of third-party cables
–
Double wiring of the supply cable:
The wiring used for the supply cables is to be doubled depending on current consump-
tion and cable length. Example:
when using encoder wiring that exhibits a cable diameter of 0.5 mm
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, a cable length of
25 m (50 m supply and return), and a current consumption of 200 mA, the voltage
drop for a single wiring configuration is Udiff ~ 0.36 V.
A double wiring configura-
tion is required (Udiff ~ 0.18 V).
–
Screening:
•
Run the encoder cable so it is screened
•
Twist differential (unscreened) signal cables in pairs (DATA/#DATA, SCLK/#SCLK,
+5 V/0 V)
•
Apply the screening to the plug housing on the motor and controller side.
For maximum resistance to interference:
•
Use cables with individually twisted and screened pairs
•
Place cable sheaths on screened pairs (internal screens), separating from outer
screen and only on controller side on Pin 3 of the related connection [X2.1] or
[X.2.2]
•
Apply the complete screening to the plug housing on the motor and controller side.
