Rockwell Automation 1794-IM8, 1794-OM8 User Manual

FLEX I/O 220V ac Digital Input and Output

Installation Instructions

Modules

Cat. No. 1794-IM8, -OM8

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

IMPORTANT

ATTENTION

WARNING

ATTENTION

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.

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.

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.

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

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.

North American Hazardous Location Approval

The following modules are N ort h A m erican Hazardous Location approved: 1794-IM8 and 1794-OM8.

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

Products marked “CL I, DIV 2, GP A, B, C, D” are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on th e rating nameplate in dicating the hazardou s location temp erature code. When com bining products within a system, the most adverse temperature code (lowest “T” number) may be used to help determine the overall temperat ure code of the sys tem. Combinations of equipment in your syste m are subject to in vestigation by the local Autho rity Having Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD

• D o not disconnect equ ipment unless power has bee n removed or the area is known to be nonhazardous.

• Do not disconnect connections to this equipment unless power has been removed o r the area is known to be nonhazardous. Secure any external con nections that mate to this equipment by using screws, sliding latches, th readed connectors, or other means provided with this product.

• S ubstitution of components may impair suitability f or 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 convien nent 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 des marquages sur sa plaque d’identification qui indiquent le cod e de température pour les environnements dangereux. Lor sque plusieurs produits s ont combinés dans un système, le code de t empérature le plus défavorable (cod e de température le plu s faible) peut être utilis é pour déterminer le code de température global du système. Les combinaisons d’équipements dans le système son t sujettes à inspecti on par les autorités locales qua lifiées au moment de l’insta llation.

AVERTISSEMENT

RISQUE D’EXPLOSION

• C ouper le courant ou s’ass urer que l’environnement est classé non dangereux avant de débrancher l'équipement .

• C ouper le courant ou s'ass urer que l’environnement est classé non dangereux avant de débrancher les connecteurs . Fixer tous les connecteur s externes reliés à cet équipement à l'aide de vis, loquets coulissants, c onnecteurs filetés ou autres moyens fournis avec ce produit.

• L a substitution de com posants peut rendre cet éq uipement inadapté à u ne utilisation en environnement de Classe I, Division 2.

• S’assurer que l’environnement est classé non da ngereux avant de changer les piles.

Publication 1794-IN104A-EN-P - March 2004

Even Numbered I/O Terminals 0 thru 14

L L U

Installing Your 220V ac Digital Input or Output Module

The module mounts on a 1794 terminal base.

ATTENTION

1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position 8 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.

WARNING

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.

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.

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.

5. If daisychaining L1 power to the next terminal base, connect a jumper from terminal 51 (220V ac L1) on this base unit to terminal 34 on the next base unit.

6. If continuing 220V ac common (L2) to the next base unit, connect a jumper from terminal 33 (220V common L2) on this base unit to terminal 16 on the next base unit.

Wiring Connections for the 1794-IM8 and -OM8

1794-IM8 1794-OM8

1794-TBN

Input

Input Ter m in al

Input 0 B-0

Input 1 B-2

Input 2 B-4

Input 3 B-6

Input 4 B-8

Input 5 B-10

Input 6 B-12

Input 7 B-14

B = Even numbered Input terminals 0-14, ac common terminals 16 and 33 C = Power terminals C-34 and C-51, and odd numbered input terminals 1 t hru 15

1 C-1, 3, 5, 7, 9, 11, 13 and 15 on the 1 794-TBN are internally connected in the module to

220V ac L1.

2 C-1, 3, 5, 7, 9, 11, 13 and 15 on the 1 794-TBN are internally connected in the module to

220V ac common L2.

220V ac Supply

C-1

C-3

C-5

C-7

C-9

C-11

C-13

C-15

Output

Output 0 B-0

Output 1 B-2

Output 2 B-4

Output 3 B-6

Output 4 B-8

Output 5 B-10

Output 6 B-12

Output 7 B-14

B = Even numbered Output terminal s 0-14, ac common terminals 16 and 33 C = Power terminals C-34 and C-51, a nd odd numbered terminals 1-15 on row C.

1794-TBN, -TBNF

Output

Common

Te rm in al

C-1

C-3

C-5

C-7

C-9

C-11

C-13

C-15

1794-TBN or -TBNF Terminal Base Wiring for 1794-IM8 and 1794-OM8

1 = 220V ac power - Connect to terminal C-34 2 = 220V ac common - Connect to terminal B-16

se B-33 and C-51 for daisychaining to the next terminal base unit

6789101112

Odd Numbered I/O Terminals 1 thru 15

(1794-TBN show

Connecting Wiring for the 1794-IM8 and -OM8

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

2. 1794-IM8: Connect the associated 220V ac L1 power lead of the input device to the corresponding odd numbered terminal (C-1, 3, 5, 7, 9, 11, 13, or 15) on row (C) for each input as indicated in the table below.

Configuring Your ac Module

Image Table Memory Map for the 1794-IM8

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0

Read Not used - set to 0 I7 I6 I5 I4 I3 I2 I1 I0

Write Not used - s et to 0 Filter Time FT Where I = Input stat us

FT = Input filter time.

(The 220V L1 power terminals of row (C) are internally connected together.) 1794-OM8: Connect the associated 220V ac common L2 lead of the output device to the corresponding odd numbered terminal (C-1, 3, 5, 7, 9, 11, 13, or 15) on row (C) as indicated in the table below. (The 220V L2 commons of odd numbered terminals on row (C) are internally connected together.)

Image Table Memory Map for the 1794-OM8

Dec. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Oct. 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0

Read Not used - set to 0

Write Not used - s et to 0 O7O6O5O4O3O2O1O

Where O = Output status

3. Connect 220V ac power (L1) to terminal 34 on the row (C).

4. Connect 220V ac common (L2) to terminal 16 on the

row (B).

Publication 1794-IN104A-EN-P - March 2004

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