Failure to adhere to the requirements listed in this
manual may cause loss of life and property.
Installation and maintenance must be performed only by qualified personnel. Area Classification, Protection Type, Temperature Class,
Gas Group, and Ingress protection must conform to the data indicated on the label.
Wiring and conduit must conform to all local and national codes governing the installation. Wiring must be rated for at least 5ºC above
the highest expected ambient temperature.
Approved wire seals against ingress of water and dust are required and the NPT fittings must be sealed with tape or thread sealant in
order to meet the highest level of ingress protection.
Where the protection type depends on wiring glands, the glands must be certified for the type of protection required.
The metal housing is in a standard die-casting alloy which is predominately aluminum. The housing can be stainless steel also.
Before powering the 12400:
1. Verify that the electronic cover screws are tightened. This maintains the ingress protection level and the integrity of the flameproof
enclosure.
2. If the Installation is Intrinsically Safe, check that the proper barriers are installed and the field wiring meets local and national codes for
an IS installation. Never install a device which was previously installed without an intrinsically safe barrier in an intrinsically safe system.
3. If the Installation is Non-Incendive, check that all the wiring meets local and national codes.
4. Verify that the markings on the label are consistent with the application.
2.2.2. FLAMEPROOF AND DUST IGNITION PROOF REQUIREMENTS
The ½” NPT fittings must enter the housing at least five full turns.
Conduit seals are required within 18” of the conduit for flameproof installation.
2.2.3. INTRINSICALLY SAFE REQUIREMENTS
Wiring must be in accordance with ES-749 (see Section 2.2.6) and must conform to national and local standards for intrinsically safe
installation.
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