Rockwell Automation 1794-IV16, 1794-OV16, 1794-OV16P User Manual

FLEX I/O Digital Sourcing Input and Sinking Output Modules

Cat. No. 1794-IV16, -OV16, and -OV16P

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.ab.com/manuals/gi) 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

ATTENTION

WARNING

Identifies information that is critical for successful application and understanding of the product.

Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you:

• identify a hazard

• avoid a hazard

• recognize the consequence

When you insert or remove the module while backplane 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.

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 (e.g. aluminum, plastic, etc.) that can corrode, oxidize, or are poor conductors, can result in improper or intermittent grounding.

Installation Instructions

ATTENTION

European Hazardous Location Approval

The following modules are European Zone 2 approved: 1794-IV16, 1794-OV16 and 1794-OV16P.

European Zone 2 Certification

This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC.

The LCIE (Laboratoire Central des Industries Electriques) certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in potentially explosive atmospheres, given in Annex II to this Directive. The examination and test results are recorded in confidential report No. 28 682 010.

Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 50021.

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 publication 60664-1), at altitudes up to 2000 meters 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 "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 comply with certain product safety certifications.

See NEMA Standards publication 250 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 1770-4.1 ("Industrial Automation Wiring and Grounding Guidelines"), for additional installation requirements pertaining to this equipment.

Preventing Electrostatic Discharge

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.

• If available, use a static-safe workstation.

Publication 1794-IN095A-EN-P - April 2004

IMPORTANT

Observe the following additional Zone 2 certification requirements.

• This equipment is not resistant to sunlight or other sources of

UV radiation.

• The secondary of a current transformer shall not be

open-circuited when applied in Class I, Zone 2 environments.

• Equipment of lesser Enclosure Type Rating must be installed

in an enclosure providing at least IP54 protection when applied in Class I, Zone 2 environments.

• This equipment shall be used within its specified ratings

defined by Allen-Bradley.

• Provision shall be made to prevent the rated voltage from

being exceeded by transient disturbances of more than 40% when applied in Class I, Zone 2 environments

North American Hazardous Location Approval

The following modules are North American Hazardous L ocation approved: 1794-IV16, 1794-OV16 and 1794-OV16P.

The following information applies when operating this equipment in hazardous locations:

Products marked “ CL I, DIV 2, GP A, B, C, D” a re suitable for use in Class I D ivision 2 Groups A, B, C , D, Hazardous Locations and no nhazardous locations o nly. Each product is supplied with markings on the rating na meplate indicating th e hazardous locatio n temperature code. When combini ng products within a system , the most adverse temperature cod e (lowest “T” number) may be used to help determine the overall temperature c ode of the system. Com binations of equipmen t in your system are subje ct to investigation by the local Authority Having Ju risdiction at the time of installation.

WARNING

EXPLOSION HAZARD

• Do not disconnect equ ipment unless power has been removed or the area is know n to be nonhazardous.

• Do not disconnect conn ections to this equipm ent unless power has been removed or the area is known to be no nhazardous. Secure any ex ternal connections that mate to this equipment by using screws, sliding latches, threaded conn ectors, or other means provided with this product.

• S ubstitution of c omponents may impair suitability for Class I, Division 2.

• If this product contains batteries, they must only be changed in an area known to be nonhazardous .

Informations sur l’utilisation de cet équipement en environnements dangereux :

Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu’à une utilisation en environnements de Classe I Division 2 Groupes A, B, C, D dangereux et non dangereux. Chaque produit est livré avec d es marquages sur sa pla que d’identification qu i indiquent le code de te mpérature pour les environneme nts dangereux. Lors que plusieurs produit s sont combinés dans u n système, le code de temp érature le plus défavorable (code d e température le plus faible) peut être uti lisé pour déterminer le code de tempér ature global du systèm e. Les combinaisons d’équipements dans le système sont sujettes à inspection par les autorités locale s qualifiées au moment de l’ installation.

AVERTISSEMENT

RISQUE D’EXPLOSION

• Couper le courant ou s’assurer que l’environnemen t est classé non dangereux avan t de débrancher l'équipement.

• Couper le courant ou s'assurer que l’environnemen t est classé non dangereux avan t de débrancher les connecteurs. Fixer tous les connecteurs externes reliés à cet équipement à l'aide de vis, loquets coulissants, connecteurs filetés ou autres moyens fo urnis avec ce produit.

• La substitution de composants peut rendre cet é quipement inadap té à une utilisation en e nvironnement de Classe I, Division 2.

• S ’assurer que l’environne ment est classé non dangereux avant de changer les piles.

Installing Your Digital Module

2. Make certain the flexbus connector (3) is pushed all the way to the left to connect with the neighboring terminal base/adapter. You cannot

install the module unless the connector is fully extended.

3. Make sure the pins on the bottom of the module are straight so they

will align properly with the connector in the terminal base.

WARNING

If you remove or insert the module while the backplane 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..

4. Position the module (4) with its alignment bar (5) aligned with the groove (6) on the terminal base.

5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (7) is locked into the module.

Connecting Wiring for the 1794-IV16, -OV16, and -OV16P

(using a

1794-TB3 or -TB3S Terminal Base Unit)

1. Connect individual input or output wiring to numbered terminals on the 0-15 row (A) as indicated in the table below.

2. 1794-IV16 - Connect the associated input device common to the corresponding terminal on the 16-33 row. (B) for each input as indicated in the table below. (Commons are internally connected together.) If using 3-wire input devices, also connect the associated input power lead to the corresponding terminal on the 34-51 row (C). 1794-OV16, -OV16P - Connect the associated +V dc power lead of the output device to the corresponding terminal on the 34-51 row (C) for each output as indicated in the table below. (The +V power terminals of row (C) are internally connected together.)

3. Connect +V dc power to terminal 34 on the 34-51 row (C).

4. Connect dc common to terminal 16 on the 16-33 row (B).

5. If daisychaining power to the next terminal base, connect a jumper

from terminal 51 (+V dc) on this base unit to terminal 34 on the next base unit.

6. If continuing dc common to the next base unit, connect a jumper from terminal 33 (common) on this base unit to terminal 16 on the next base unit.

Note: The total current draw through any terminal base unit is limited to 10A. Separate power connections may be required.

The module mounts on a 1794 terminal base.

ATTENTION

During mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept

from falling into the module. Debris that falls

into the module could cause damage on power up.

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position 2 as required for this type of module.

Publication 1794-IN095A-EN-P - April 2004

+ 2 hidden pages