3500 Series Flat Panel Industrial PC
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group rating will be. A device approved for installation within Class I, Group A locations
may also be used in Groups B, C, or D.
Note
Approved Class I equipment may not be suitable for Class II installa-
tions. Class I includes Groups A, B, C, and D. Class II includes Groups
F, and G.
Power Switch
The systems do not have a power switch. The amount of input power required by these
systems classifies a power switch as an incendiary device because the voltage and cur-
rent across the make/break device are capable of creating a spark.
Hazardous locations’ regulations require that a power switch rated for ordinary locations
may be used if it is located in an area specified as non-hazardous. However, limits in ca-
ble length between the workstation and the power switch may apply. Otherwise the
switch must be compliant with Class I, Division 1 requirements (intrinsically safe).
These switches are built in a manner that prevents the possibility of a spark when con-
tacts are made or broken.
Use suitable UL listed and/or CSA Certified Class I, Division 1 switches in hazardous
locations. These switches are available from a wide number of sources. It is the respon-
sibility of the customer to ensure that the power switch selected for their installation has
the correct hazardous locations rating for the location in which it is installed.
Cable Connections
Division 2 hazardous locations’ regulations require that all cable connections be pro-
vided with adequate strain relief and positive interlock. USB connections can never be
used in hazardous location installations, because USB connectors do not provide ade-
quate strain relief. Never connect or disconnect a cable while power is applied at either
end of the cable.
All communication cables should include a chassis ground shield. This shield should in-
clude both copper braid and aluminum foil. The D-sub style connector housing should be
a metal conductive type (e.g., molded zinc) and the ground shield braid should be well
terminated directly to the connector housing. Do not use a shield drain wire.
The outer diameter of the cable must be suited to the inner diameter of the cable con-
nector strain relief in order to ensure that a reliable degree of strain relief is maintained.
Always secure the D-Sub connectors to the 3515/3512KPM workstation-mating con-
nectors via the two screws located on both sides.
Warning
Never connect or disconnect the communication cables while power is
applied at either end of the cable. This may result in an incendiary spark.
Permanent damage to the workstation communication components may
occur.