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Disturbances

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13 Disturbances

This chapter describes possible causes for disturbances and measures for their removal. In case of increased

disturbances, please follow the measures for fault clearance in chapter 13.1.

In case of disturbances that cannot be eliminated by following the advice and the fault clearance measures giv-

en here, please contact the manufacturer (see second page).

13.1 Fault Clearance

CAUTION!

The device, the connection line and the signal cable must not be in-

stalled next to sources of interference that emit strong inductive or ca-

pacitive interference or strong electrostatic fields.

External perturbations can be avoided through suitable cable routing.

The shield of the signal output cable should only be connected to the

following circuit on one side. The shield should not be grounded on

both sides. Signal cables always have to be routed separately from the

load power line. A safety distance of at least 0.5 m has to be kept from

inductive and capacitive sources of interference such as contactors,

relays, motors, switching power supplies, clocked controllers etc.!

If interferences occur in spite of all the items stated above being ob-

served, please proceed as follows:

1. Installation of RC-circuits via contactor coils of AC-contactors

(e.g. 0,1 µF / 100 Ω)

2. Installation of recovery diodes via DC-inductors

3. Installation of RC-circuits via the different motor phases (in the

terminal box of the motor)

4. Do not connect protective earth and ground

5. Connect a mains filter ahead of the external power pack

Elgo LIMAX Safe SG User Manual

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