ABB PFSK129 3BSE007284R1 Channel isolation card

It is essential to connect the encoder with screened lines and wherever possible with differential signals (RS422). The DAC output must also be connected with screened lines to the motor power section. Always install the screens to the motor controller and to the encoder on both sides. To prevent undesirable current leakage through the screening, it may be necessary to also provide a potential equalization conductor, particularly in case of long distances or different supplies. If a frequency converter is applied, its motor cables should if possible be installed so as to be screened

Encoder power supply 

The DC/DC converter on the board also provides the +5V power supply to the encoder . This eliminates the need for a special supply for these encoder . As a zero pulse generator, proximity switches can be used, which are also supplied from the board with 15V.The additional inputs and outputs must always be wired inside the control cabinet (max. length 1m). Otherwise they must be provided with screening. See also INDEL wiring guidelines and INDEL design guidelines.

Grounding 

Grounding of the 4KP is through the casing. The motor controller must be separately grounded. Take care to ensure that the mounting bar has very good contact to the mounting plate or to the chassis to ensure that interference is discharged. The encoder are frequently mounted directly on the motor. It is essential to ground also this motor encoder combination as otherwise the motor current will interfere with the encoder electronics .

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