ABB DSAI 135 57120001-LE Analog Input Unit

The preparation of bus cables is an essential factor in ensuring reliable operation and electromagnetic compatibility (EMC). Wiring requirements 

 The cables must be shielded.  The cable shield must be made from a copper braid. 

 The cable shield must make a low impedance connection with the connector casing over a large contact area. This is achieved by:  Use of metal or metallized connector casings with a cable clamp for strain relief. 

 The cable clamp must be screwed securely to the connector.

Connecting the cable shield

1 Strip the cable end so that approx. 3 cm of the shield braid is exposed. 

2 Fold back the shield braid over the cable shield. 

3 Fit approx. 3 cm of heat shrinkable tubing over the folded back end of the shield braid or use a rubber grommet.  5…8 mm of the shield braid must be exposed at the cable end.  The folded back shield braid end must be covered by the heat shrinkable tubing or by the rubber grommet. 

4 Fit the D-Sub connector to the cable end:  The exposed metal shield braid must be clamped to the connector casing with the cable clamp.

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