Ferrites And Option Board Cabling; Ferrites - Mettler Toledo IND780 Guide D'installation

Periodically inspect the terminal to insure that it is securely anchored to the wall. If not, remove the
terminal and retighten the mounting anchor bolts.
2.4.

Ferrites and Option Board Cabling

2.4.1.

Ferrites

In order to meet certain electrical noise emission limits and to protect the IND780 from external
influences, it is necessary to install a ferrite core on each cable connected to the terminal. Two
types of ferrites are supplied with the basic terminal, and additional ferrites may be supplied with
each of the options.
• The large clamp ferrites can be attached to larger cables such as Ethernet, USB and some PLC
• The large core ferrite is used with the panel mount power cable, serial interface and analog load
• The small clamp ferrite is to be used on the ground wire of the POWERCELL MTX board. In this
To install the large core ferrite on the panel mount power cord, remove the insulation and shielding
from the end of the cable. Before attaching the power connector, route the blue and brown wires
through the center of the core and take two wraps around the outside of the core, each time routing
the cables through again. Note that the striped green and yellow ground wire does not pass through
the core. Similarly, on the analog load cell cable, wrap the individual wires around the ferrite core
twice to reduce the effects of electrical noise and interference.
When using a clamp type ferrite, a loop can be made in the cable and the ferrite snapped over the
spot where the cable overlaps itself. Either the complete cable or individual wires can be wrapped
through the ferrite.
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cables.
cell cable.
case, no wrap is required.
Figure 2-15: Ferrite Core on Panel Mount Power Cord
Figure 2-16: Ferrite Core on Analog Load Cell Cable
METTLER TOLEDO IND780 Installation Guide
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