Rockwell Automation FLEX 1794-TB2 Installation Instructions Manual

FLEX I/O Terminal Base Units
1794-TB2, -TB3, -TB3K, -TB3S, -TB32, -TB32S, -TB3G,
-TB3GK, -TB3GS, -TB3T, -TB3TS, -TBN, -TBNK, -TBNF,
-TBNFK, -TBKD, -TB3SK, -TB3GSK, -TB3TK, -TB3TSK
(Modules with a K in the last position of the catalog number 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://www.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.
Identifies information about practices or circumstances that can cause an
WARNING
explosion in a hazardous environment, which may lead to personal injury or
death, property damage, or economic loss.
Identifies information that is critical for successful application and
IMPORTANT
understanding of the product.
Identifies information about practices or circumstances that can lead to
ATTENTION
personal injury or death, property damage, or economic loss. Attentions
help you identify a hazard, avoid a hazard, or recognize the consequence
Environment and Enclosure
ATTENTION
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 Standards 250 and IEC 60529, as applicable, for
explanations of the degrees of protection provided by different
types of enclosure.
Installation Instructions
When you insert or remove the module while backplane power is on, an
WARNING
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.
If you connect or disconnect wiring while the field-side power is on, an
WARNING
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.
FLEX I/O systems are grounded through the DIN rail to chassis ground. Use
ATTENTION
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.
Prevent Electrostatic Discharge
ATTENTION
This equipment is sensitive to electrostatic discharge, which can cause internal
damage and affect normal operation. Follow these guidelines when you handle
this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in
use.
Do not remove or replace a Terminal Base unit while power is applied.
ATTENTION
Interruption of the backplane can result in unintentional operation or machine
motion.
Do not wire more than 1 conductor on any single terminal.
ATTENTION
Personnel responsible for the application of safety-related Programmable
ATTENTION
Electronic Systems (PES) shall be aware of the safety requirements in the
application of the system and shall be trained in using the system.
Publication 1794-IN092E-EN-P - November 2009