Rockwell Automation Guardmaster 440R-ENETR, Руководство пользователя, Страница: 15 / 86

Rockwell Automation Publication 440R-UM009C-EN-P - July 2019 15
Installation Chapter 2
Network Connections
The ENETR interface has two network connections, using standard RJ45
connectors. The connection that is labeled LNK1 is on the top of the housing,
and the LNK2 connection is on the bottom of the housing. Connection can be
made to either LNK1 or LNK2. The network connection is a repeater; the signal
coming into one Link is repeated at the other Link. Figure 5 shows an example of
a system with both LNK1 and LNK2 connections.
Figure 5 - Example Showing Link 1 and Link 2 Network Connections
Enclosure Considerations
Most applications require installation in an industrial enclosure to reduce the
effects of electrical interference and environmental exposure. Pollution Degree 2
is an environment where normally only non-conductive pollution occurs except
that occasionally temporary conductivity that is caused by condensation can be
expected. Overvoltage Category II is the load level section of the electrical
distribution system. At this level, transient voltages are controlled and do not
exceed the impulse voltage capability of the product insulation.
This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in
IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating. This
equipment is considered Group 1, Class A industrial equipment according to
IEC/CISPR 11. Without appropriate precautions, there can be difficulties with
electromagnetic compatibility in residential and other environments due to
conducted and radiated disturbances.
This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental conditions
that are present and appropriately designed to help prevent personal injury that
results from accessibility to live parts. The enclosure must have suitable flame-
retardant properties to help prevent or minimize the spread of flame, complying
with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if non-metallic.
The interior of the enclosure must be accessible only by use of a tool. Subsequent
sections of this publication contain additional information regarding specific
enclosure type ratings that are required to comply with certain product safety
certifications.
Other helpful publications can be found in Additional Resources on page 6 .