7 Hazardous location installation
Version 2.1
7.1 General installation requirements
The AMS Asset Monitor must be solely connected to SELV/PELV electrical circuits to meet
the requirements for explosion protection. This also applies to all devices connected to the
AMS Asset Monitor. Exceptions are explicitly stated. In version 1.0, the Relay Terminal
Block is approved for voltages up to 250 V. An installation in Zone 2 is permitted if the
conditions stated in the following chapters are met.
Ensure a distance of at least 50 mm between the outer edge of the terminals used for
intrinsically safe field installation wiring and all other circuits or wirings.
Use wire types and wiring apparatus with a temperature rating ≥70°C.
7.2 Connection requirements
The wire cross-section of the used cables must be within the range of 0.34<F<2.5 mm
2
.
Use ferrules at stranded conductors.
Connect the shield of the Ethernet cable to ground at the remote station. Integrate the
grounding of all cable shields into to potential equalization system.
All used connectors (Ethernet- and power supply terminals) must be locked. Ensure this
besides using suitable connectors by using cable glands, suitable for the respective cable
diameter approved for the use in potentially explosive atmospheres.
Only use the USB port at open field housing, which requires a hazard-free environment.
7.3 Special conditions of safe use
1. The end user shall ensure appropriate earthing upon installation. The transmission
resistance for SELV/PELV circuits must not exceed 10
9
Ω. For the grounding of
hazardous live voltages comply with the additional requirements of protective
grounding.
2. Electrostatic charging during operation and maintenance has to be excluded. The
device shall only be installed in areas where operational and process related
electrostatic charges are not present.
3. Final acceptance of this equipment when installed is subject to the jurisdiction of
the local inspection authority. The DeltaV CHARMs have their own component
certification to be assessed within the overall system.
The following warnings must be observed:
• WARNING: EXPLOSION HAZARD - DO NOT CONNECT OR DISCONNECT WHILE
CIRCUITS ARE LIVE UNLESS AREA IS KNOWN TO BE NON-HAZARDOUS
Installation Guide Hazardous location installation
MHM-97923-PBF March 2024
MHM-97923-PBF, Rev. 2.10 73
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