Environment and enclosure information – Rockwell Automation 6181X-12TPXPDC Industrial Integrated Computers for Hazardous Locations User Manual
Page 17
Rockwell Automation Publication 6181X-UM001B-EN-P - May 2011
17
Installation Chapter 2
The USB peripheral devices and their associated cabling shall have circuit
parameters with the limits given in the
Control Drawing - Class I Division 2 and
Zone 2 Required Circuit Parameters for USB Peripheral Devices
section table for
them to remain nonincendive when used with the 6181X computers’ USB ports.
For the comparison of C
a(USB)
, use the capacitance of each individual connected USB
peripheral device, C
i(peripheral)
, and its associated cable, C
cable
.
If cable capacitance and inductance are not known, the following values may be
used:
C
cable
= 197
µ
F/m (60 pF/ft)
L
cable
= 0.7
µ
H/m (0.20
µ
H/ft)
Environment and Enclosure
Information
Review the information on enclosures and environments before installing the
product.
ATTENTION: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined
in IEC publication 60664-1), at altitudes up to 2000 m (6561 ft) without
derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR Publication 11. Without appropriate precautions,
there may be potential difficulties ensuring electromagnetic compatibility in
other environments due to conducted as well as radiated disturbance.
This equipment is supplied as an open-type equipment. It must be mounted
within an enclosure that is suitably designed for those specific
environmental conditions that will be present and appropriately designed to
prevent personal injury resulting from accessibility to live parts. The interior
of the enclosure must be accessible only by the use of a tool. Subsequent
sections of this publication may contain additional information regarding
specific enclosure type ratings that are required to be complied with certain
product safety certifications.
All 6181X-12 display units are shipped with a gasketed bezel to meet
specified NEMA, UL Type, and IEC ratings only when mounted in a panel or
enclosure with an equivalent rating. Other sections of this publication
contain additional information regarding specific enclosure-type ratings
required to comply with certain product safety certifications.
See NEMA Standard publication 250, UL 50, and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure. Also, see the appropriate sections in this
publication, as well as the Allen-Bradley publication
Automation Wiring and Grounding Guidelines, for additional installation
requirements pertaining to this equipment.