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Installing Ferrite Beads On Unshielded Cables; Step 1: Connecting Power Supply - Siemens SITRANS F TRANSMAG 2 Operating Instructions Manual

Electromagnetic flometers
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5.2

Installing ferrite beads on unshielded cables

Usage of ferrite beads
Ferrite beads are used to help reduce high-frequency interference on interface and control
cables. Ferrite beads are only required when electromagnetic compatibility is an issue. When
using shielded cables for inputs and outputs, ferrite beads are not needed.
Installing ferrite beads on the power supply, in/outputs, and bus signal cables
Included in the scope of delivery is a plastic bag containing the ferrite beads:
• One large ferrite bead in a shrink-down plastic tubing to be used for the power supply cable.
• Three small sized ferrites to be used for bus signal and in/output cables.
Install the ferrite beads by threading the cable in a loop through the ferrite bead.
Figure 5-3
Note
Ferrite beads with shielded cables
If shielded cables are used, then the shield and shield drain wire must not pass through the bead.
The ferrite beads should be installed as close as possible to the terminal connector of the device.
5.3

Step 1: Connecting power supply

Only connect the device to the supply which matches the specifications on the rating plate.
Connect the power supply by an easily accessible and appropriately labeled isolating device
and fuse (max. 4 A) or an easily accessible circuit breaker (max. 4 A).
TRANSMAG 2 with MAG 911/E
Operating Instructions, 03/2021, A5E00102775-AC
Cable looped through ferrite bead
CAUTION
5.3 Step 1: Connecting power supply
Connecting
35

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