Trio MC403 - Cable Shields Best Practices; Encoder Cable Shielding; Serial Cable Shielding (RS232;RS422;RS485)

11
CABLE SHIELDS
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Both ends of the encoder cable’s screen must be connected using a 360
degree contact and not a pig-tail connection.
The 0V must be connected separately from the screen. Make sure that
encoder cables are specied with one extra wire to carry the 0V.
SCREEN CONNECTED INTERNALLY
TO METAL SHIELD
SCREEN CLAMPED
TO EARTH
All serial cables must be terminated in an 8-pin mini-DIN connector. For best EMC
performance, clamp the screen of the serial cable where it enters the connector cover.
Do not make a “pig-tail” connection from the screen to the plug cover.
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Both ends of the serial cable’s screen must be connected using a 360 degree
contact and not a pig-tail connection.
The 0V must be connected separately from the screen. Make sure that
serial cables are specied with one extra wire to carry the 0V.
This applies to RS422/RS485 serial connections as well as RS232.