Installation Procedure; Mounting The Terminal - Mettler Toledo IND780 Installationsanleitung

C + C
i (PDX)
C
i (PDX)
C
cable
(.00602 µF + 0.036 µF) = 0.04202 µF ≤ 1000 µF
L + L
i (PDX)
L
i (PDX)
L
cable
(0 µH + 120 µH) = 120 µH ≤ 2.0 mH
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.

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.

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.
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).
IND780 Terminal Division 2 and Zone 2/22 Installation Manual
Formula
CANBus listening
≤ C
or C
cable a o (l/c)
= .602 nF * 10 cells = 6.02nF = .00602 µF
= 60 pF / foot * 600 feet = 36,000 pF = 0.036 µF
≤ L
or L
cable a o (l/c)
= 0 µH
= 0.2 µH / foot * 600 feet = 120 µH
Pass or Fail
PASS
PASS
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