Installation Procedure; Mounting The Terminal - Mettler Toledo IND780 Guia De Instalacion

In addition to the formulas above, the temperature rating of the IND780 terminal must be checked
against the AIT (Auto Ignition Temperature) of the hazardous product. For this example, the
hazardous product has an AIT of 200°C (393°F), which is higher than the rating of the IND780
terminal UL approval value of 135°C (211°F). This indicates the temperature comparison test
passes.
Since all three field circuit parameters for power, CANBus listening, and CANBus talking pass the
formula evaluations and the temperature comparison test passes, the products listed in this
example may be safely installed into a Division 2 area. They must be installed according to the
IND780 control drawing 64069877 using all pertinent local and national standards.
2.9.

Installation Procedure

Once the information in this chapter and in all other suggested regulatory documents has been read
and understood, the IND780 terminal may be installed. In addition to the information in this
chapter, instructions, control drawings and details listed in the certificates found in the Appendix of
this guide must be followed during the installation.
2.9.1.

Mounting the Terminal

The Panel Mount enclosure is designed to mount into a cutout of a flat surface such as an
instrument panel or industrial enclosure or door. The harsh enclosure is designed to be placed on a
desktop or can be mounted to a vertical surface with the optional mounting brackets. Mount the
terminal where viewing is optimal and the terminal keypad is easily accessible.
2.9.1.1. Panel Mount Enclosure
The Panel Mount enclosure comes with a gasket and a backing plate, used to mount the unit to a
panel. The enclosure will mount and seal properly on panel thicknesses from 16 GA to 11 GA
(1.52 mm to 3.04 mm).
Install the Panel Mount enclosure by following these steps:
Cut an opening and holes in the panel or industrial enclosure as indicated in the panel cutout
dimensions shown in Figure 2-4 in inches and [mm].
2-14 METTLER TOLEDO IND780 Division 2 and Zone 2/22 Installation Guide
CANBus listening
L + L ≤ L or L
i (PDX) cable a o (l/c)
L = 0 µH
i (PDX)
L = 0.2 µH / foot * 600 feet = 120 µH
cable
(0 µH + 120 µH) = 120 µH ≤ 2.0 mH
Formula
Pass or Fail
PASS
64063214 | 07 | 02/2018