Securing Cables For Use In Hazardous Areas - Siemens SIMATIC HMI Unified Comfort MTP700 Operating Instructions Manual

HMI devices with display diagonal ≥ 15"
For devices with display diagonal ≥ 15", secure the cables to the marked fixing elements of
the strain relief plate.
The figure below shows the fastening components using the MTP1900 Unified Comfort as
an example.
3.4.10

Securing cables for use in hazardous areas

For securing the connected cables, use the appropriate mounting elements, as described in
the previous chapter.
When devices with Ex approval are used in hazardous areas, note that the connectors must
be secured in a captive manner at the interfaces.
Explosion hazard from sparks when connectors come loose
If a plug connector comes loose from the associated device interface during operation in a
hazardous area, a spark over at the interface may cause an explosion. Death or serious
physical injury as well as property damage may result.
For use in hazardous areas, it must be ensured that the plug connectors of the cables are
fully connected to the respective interface and cannot come loose from the interfaces in any
case.
Secure all connected cables directly at the transition between connector and cable to the
nearest mounting element using a cable tie. Tighten up all cable ties in such a way that
they fully wrap around the respective cable but do not damage the cable.
Unified Comfort Panels
Operating Instructions, 03/2020, A5E46641217-AA
WARNING
Mounting and connecting the device
3.4 Connecting the device
55