Electrical Installation Of The Encoder; Emc Information; General Information - Kübler Sendix SIL Serie Instrucciones De Uso

7. Electrical installation of the encoder

Please always disconnect the power supply before connecting or disconnecting the signal line.
Comply with the corresponding operating instructions of the external drive system/controller when
connecting the encoder.

7.1 EMC Information

• Use only shielded twisted-paired conductors as encoder cables.
• Connect the shield at both ends to the ground on a large contact area. Make sure that the cable
shields are well fastened.
• When wiring your installation, take care to route the cables properly. Separate the wiring in cable
groups such as motor / power supply cables and signal / data cables. Route the signal and data
cables as close as possible to grounded surfaces (supporting beams, metal rails, cabinet sides) and
not parallel to motor and power supply cables.
• Connect all equipment with low impedance to the ground/protective conductor system.

7.2 General information

1. Safety standards in force
• Before commissioning, all required cable wires are to be connected in compliance with the data
sheet! Insulate all unused ends properly in order to prevent any short-circuit.
• When confectioning the mating connector, observe the instructions possibly attached to this con-
nector.
• Recommended cable lengths:
• For symmetric transmission (e. g. compliant with RS422), max. cable length 50 m
(Cable length with twisted pairs)
• Connect or disconnect the mating connector only when the encoder is switched off.
• Respect the proper operating voltage and the maximum allowable output current (see data sheet)!
• The operating voltage of the encoder and of the controller must be switched on and off simultane-
ously.
2. An EMC-compliant installation is the prerequisite for achieving CE conformity:
• Use totally shielded cables as control cables. In case of symmetric transmission (e. g. RS422), use
a cable with twisted wire pairs. The shield of the cable is ideally applied on the encoder and on the
controller through the complete periphery (360°) of shieldable connectors or cable feedthroughs.
• The protective earth (PE) is to be applied preferably on both sides, on the encoder and on the
controller, with low impedance.
• In case of problems due to ground loops, disconnect the protective earth (PE) from the encoder
side. The encoder should then be electrically insulated from the drive.
• The encoder lines must be routed separately from cables with high interference levels.
• No electrical devices with high interference levels such as e. g. frequency converters, solenoid
valves, contactors, etc., should be connected to the voltage supply of the encoder. Otherwise, a
suitable voltage filtering must be provided.
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