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

Installation Instructions

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.

Identifies information about practices or circumstances that can cause

WARNING

an 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

•recognize the consequence

			When you insert or remove the module while backplane power is on,
	WARNING
			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.
			FLEX I/O is 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 (e.g. aluminum,
			plastic, etc.) that can corrode, oxidize, or are poor conductors, can
			result in improper or intermittent grounding.

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 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

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.

• If available, use a static-safe workstation.

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.

Publication 1794-IN095A-EN-P - April 2004

2

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 Location approved: 1794-IV16, 1794-OV16 and 1794-OV16P.

The following information applies when operating this	Informations sur l’utilisation de cet équipement en
equipment in hazardous locations:	environnements dangereux :
Products marked “CL I, DIV 2, GP A, B, C, D” are suitable for	Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent
use in Class I Division 2 Groups A, B, C, D, Hazardous	qu’à une utilisation en environnements de Classe I Division 2
Locations and nonhazardous locations only. Each product is	Groupes A, B, C, D dangereux et non dangereux. Chaque produit
supplied with markings on the rating nameplate indicating the	est livré avec des marquages sur sa plaque d’identification qui
hazardous location temperature code. When combining	indiquent le code de température pour les environnements
products within a system, the most adverse temperature code	dangereux. Lorsque plusieurs produits sont combinés dans un
(lowest “T” number) may be used to help determine the overall	système, le code de température le plus défavorable (code de
temperature code of the system. Combinations of equipment	température le plus faible) peut être utilisé pour déterminer le
in your system are subject to investigation by the local	code de température global du système. Les combinaisons
Authority Having Jurisdiction at the time of installation.	d’équipements dans le système sont sujettes à inspection par
	les autorités locales qualifiées au moment de l’installation.
EXPLOSION HAZARD		RISQUE D’EXPLOSION
WARNING	AVERTISSEMENT	• Couper le courant ou s’assurer que
• Do not disconnect equipment
unless power has been removed or		l’environnement est classé non
the area is known to be		dangereux avant de débrancher
nonhazardous.		l'équipement.
• Do not disconnect connections		• Couper le courant ou s'assurer que
to this equipment unless power		l’environnement est classé non
has been removed or the area is		dangereux avant de débrancher les
known to be nonhazardous.		connecteurs. Fixer tous les
Secure any external connections		connecteurs externes reliés à cet
that mate to this equipment by		équipement à l'aide de vis, loquets
using screws, sliding latches,		coulissants, connecteurs filetés ou
threaded connectors, or other		autres moyens fournis avec ce produit.
means provided with this product.		• La substitution de composants peut
• Substitution of components may
		rendre cet équipement inadapté à une
impair suitability for Class I,		utilisation en environnement de
Division 2.		Classe I, Division 2.
• If this product contains		• S’assurer que l’environnement est
batteries, they must only be		classé non dangereux avant de
changed in an area known to be		changer les piles.
nonhazardous.
Installing Your Digital Module
		7
3		1
		2
		6
4		5

The module mounts on a 1794 terminal base.

During mounting of all devices, be sure that all

ATTENTION

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.

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.

		If you remove or insert the module while the
	WARNING
		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.

Publication 1794-IN095A-EN-P - April 2004