User`s manual

Electromagnetic Compatibility Measures for Bus Adapter 170 INT 110 03

Central Shielding Measures for the INTERBUS

Central shielding

measures

For the commissioning phase, a large surface area connection should be made

between each cable shield and ground (FE/PE rail) directly after the cable enters the

switch cabinet.

Static discharge Very long bus cables, which have been laid but not yet connected, are discharged

as follows:

Notes for

connection the

cable shield with

earth

Step Action

1 Begin with the static discharge with the INTERBUS plug nearest to the FE/PE

rail.

2 Touch the FE/PE rail of the switch cabinet with the metal of the plug case.

3 Then plug the bus plug into the device, but only after this has been statically

discharged.

4 Discharge the cable’s other INTERBUS plugs in the same way and then plug

these into the device.

Note: The metal guide of the INTERBUS plug is internally connected with the cable

shield during the construction of the cable. If the bus cable plug is plugged into the

module’s INTERBUS interface, a short connection is automatically established

between the shield and PE.