Positioning Terminal On Fasteners; Ferrites And Option Board Cabling; Ferrites - Mettler Toledo IND780 Manual De Instalación

Positioning Terminal on Fasteners

Place the holes in the terminal brackets over the fasteners, and slide the terminal
down firmly so that each fastener and washer engages the slots in the bracket (see
Figure 2-9).
For wallboard or drywall mounting, after engaging the brackets pull them away
from the wall until the toggle nuts are felt to contact the inside of the wall. If
necessary, unmount the terminal and tighten the bolts slightly. Figure 2-14 shows
the relationship between bracket, hardware and wall.
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.

Ferrites and Option Board Cabling

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 cables.
• The large core ferrite is used with the panel mount power cable, serial interface
and analog load cell cable.
• The small clamp ferrite is to be used on the ground wire of the POWERCELL
board. In this case, no wrap is required.
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.
Wallboard
Flat washer
Bracket
Figure 2-14: Wallboard or Drywall Installation
IND780 Installation Manual
Toggle nut
2-11