Glands And Plugs; Non-Incendive Or I.S. Level C Inputs And Outputs - Mettler Toledo IND780 Guia De Instalacion

2.1.3.

Glands and Plugs

The European ATEX certification and the IECEx certification require that all glands and plugs on the
harsh enclosure IND780 be ATEX- or IECEx-certified increased safety glands and plugs when the
terminal is installed into a Zone 2 or Zone 22 area. The standard glands and plugs are NOT
certified for increased safety. IND780 terminals with factory numbers ending in Z97 have ATEX
plugs in their openings, and are shipped with a kit of ATEX glands.
Figure 2-3 shows examples of these ATEX-certified increased safety "e" glands and plugs.
2.2.

Non-Incendive or I.S. Level c Inputs and Outputs

If a specific input or output is rated non-incendive, or I.S. level c, then a list of the field circuit
parameters for that I/O will be given on the control drawing or certificate that can include the
voltage, current, power, capacitance, and inductance. If an approved apparatus will be connected
to a non-incendive input or output, then a comparison must be made between some of the
electrical field circuit parameters of both devices including the connecting cable. These field circuit
parameters include voltage, capacitance and inductance for Division 2 and Zone 2/22 applications.
A current comparison and power comparison is not required in Division 2 or Zone 2/22
applications since the evaluation is made under normal operating conditions.
The two devices must compare as follows in order for the wiring to be considered non-incendive:
2-4 METTLER TOLEDO IND780 Division 2 and Zone 2/22 Installation Guide
Figure 2-2: Terminal with Power Cord
Figure 2-3: ATEX-Certified Increased Safety Plug and Gland
64063214 | 07 | 02/2018