Publication 1794-IN128E-EN-P - March 2011
Installation Instructions
FLEX I/O ControlNet Adapter Modules
Cat. No. 1794-ACN15, 1794-ACN15K, 1794-ACNR15,
1794-ACNR15XT, Series D
(1794-ACN15K and 1794-ACNR15XT are conformally coated to meet noxious gas
requirements of ISA/ANSI-71.040 1985 Class G3 Environment.)
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication
SGI-1.1
available from your local
Rockwell Automation sales office or online at
http://literature.rockwellautomation.com
)
describes some important differences between solid state equipment and hard-wired
electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is
acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular
installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual
use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING
Identifies information about practices or circumstances that can
cause an explosion in a hazardous environment, which may lead to
personal injury or death, property damage, or economic loss.
IMPORTANT
Identifies information that is critical for successful application and
understanding of the product.
ATTENTION
Identifies information about practices or circumstances that can
lead to personal injury or death, property damage, or economic
loss. Attentions help you to identify a hazard, avoid a hazard, and
recognize the consequences.
SHOCK HAZARD
Labels may be on or inside the equipment, for example, a drive or
motor, to alert people that dangerous voltage may be present.
BURN HAZARD
Labels may be on or inside the equipment, for example, a drive or
motor, to alert people that surfaces may reach dangerous
temperatures.
ATTENTION
Environment and Enclosure
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
may 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 will be present and
appropriately designed to prevent personal injury resulting from
accessibility to live parts. The enclosure must have suitable
flame-retardant properties to 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 the use of a tool. Subsequent sections of this
publication may contain additional information regarding specific
enclosure type ratings that are required to comply with certain
product safety certifications.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines,
Rockwell Automation publication
1770-4.1
, for additional
installation requirements.
• NEMA Standard 250 and IEC 60529, as applicable, for
explanations of the degrees of protection provided by
different types of enclosure.
WARNING
If you insert or remove the module while backplane power is on, or
connect or disconnect the ControlNet cable (BNC or NAP) with
power applied to the module or any device on the network, an
electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
WARNING
If you connect or disconnect wiring while the field side power is on,
an electrical arc can occur. This could cause an explosion in
hazardous location installations. Be sure that power is removed or
the area is nonhazardous before proceeding.
WARNING
The Network Access Port (NAP) is intended for temporary local
programming purposes only and not intended for permanent
connection. If you connect or disconnect the NAP cable with power
applied to this module or any device on the network, an electrical arc
can occur. This could cause an explosion in hazardous location
installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
ATTENTION
FLEX I/O is grounded through the DIN rail to chassis ground. Use
zinc plated yellow-chromate steel DIN rail to assure proper
grounding. The use of other DIN rail materials (for example,
aluminum or plastic) that can corrode, oxidize, or are poor
conductors, can result in improper or intermittent grounding. Secure
DIN rail to mounting surface approximately every 200 mm (7.8 in.)
and use end-anchors appropriately.
ATTENTION
Personnel responsible for the application of safety-related
programmable electronic systems (PES) shall be aware of the safety
requirements in the application of the system and shall be trained
in using the system.
