Marine And Offshore Ex I Applications - WAGO 750 Series Manual

Serie 750, 753 Planning
Clearance and Creepage Distance Requirements
For all sections of a node that contain I/O modules for Ex i use, stricter requirements re-
garding clearances and creepage distances apply. Before the first such node section, the
respective Ex i supply module (750-606 or 750-625/000-001) ensures the required dis-
tance.
After each such node section, four distance modules (750-616) must be used. This also
applies when the next section also starts with an Ex i supply module (750-606 or
750-625/000-001).
Exceptions:
If the following section consists of an end module for bus extension (750-627), one
distance module (750-616) is sufficient.
If the following section consists of one end module (750-600), no distance modules are
required.
5.5.3 Marine and Offshore Ex i Applications
When I/O modules are used in marine Ex i applications, additional requirements must be
8 Ex i Applications [} 38]
considered alongside those described under Ex i.
Power Supply Concept for Marine Applications in Ex i Zone, Class A
To use intrinsically safe modules Class A marine applications (all areas, except bridge
and open deck), the filter module 750-624/xxx-xxx must be used in conjunction with the
Ex i supply module.
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