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The Ex Power Supply is specified as follows:
Power supply
Operating temperature
Storage temperature
Rating
Material
For further information to relevant standards and the examination certificate, see
Conformity for Ex Power
page 142.
9.2.3 Installation
The basic installation of sensing heads and the Ex Power Supply is shown in the following figure.
MI3 Communication Box
100 to 127 VAC
200 to 240 VAC
115 / 230 VAC is selected by switch. Before installation please check lokal mains voltage to avoid damage!
Figure 42: Basic Installation in the Explosion Critical Area
In areas with explosive environments, only intrinsically safe sensing heads must be
used!
The total sensing head cable length for all networked sensing heads must not exceed
30 m (98 ft)!
60
115 / 230 VAC, 50/60 Hz, 0.1 A, internal fuse 0.25 A (nonexchangeable)
-10 to 65°C (14 to 149°F)
-20 to 85°C (-4 to 185°F)
IP65
Aluminum, die casted
Figure 41: Dimensions of Housing for Ex Power Supply
Supply, page 135 or
Ex Power Supply
Data cable
Rev. G Nov/2015
max. torque 3 Nm (2.2 lbf ft)
Protective ground (PE)
IECEx Certificate of Conformity for Power
ATEX Certificate of
Explosion critical area
Total sensing head cable length:
max. 30 m (98 ft)
Supply,
MI3
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Questions and answers
I am currently installing 4 modules, each with 2 of the Raytek MI3 units. 7 of the units arrived with the normal display (Bottom Unit in photo), but 1 has only a full white block in the display. Is this indicative of a failed unit, or would this require external adjustments. These units always work when received, so I am unfamiliar with the required troubleshooting.