Rockwell Automation 1794-IM16, 1794-OM16 User Manual

Installation Instructions

FLEX I/O 240V AC Digital Input and Output Modules

1794-IM16, 1794-OM16

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 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

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

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 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 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, for

additional installation requirements, Allen-Bradley publication

1770-4.1.

• NEMA Standards 250 and IEC 60529, as applicable, for explanations

of the degrees of protection provided by different types of enclosure.

http://www.literature.rockwellautomation.com)

North American Hazardous Location Approval

The following modules are North American Hazardous Location approved: 1794-IM16, 1794-OM16.

ATTENTION

WARNING

The following information applies when operating this equipment in

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.

• Store the equipment in appropriate static-safe packaging when not

in use.

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.

If 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.

Do not connect control circuit directly to line voltage. Line voltage must be supplied by a suitable, approved isolating transformer or power supply having short circuit capacity not exceeding 100 VA maximum or equivalent.

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 the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest “T” number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD

• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.

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

• Substitution of components 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 des marquages sur sa plaque d’identification qui indiquent le code de température pour les environnements dangereux. Lorsque plusieurs produits sont combinés dans un système, le code de température le plus défavorable (code de température le plus faible) peut être utilisé pour déterminer le code de température global du système. Les combinaisons d’équipements dans le système sont sujettes à inspection par les autorités locales qualifiées au moment de l’installation.

AVERTISSEMENT

RISQUE D’EXPLOSION

• Couper le courant ou s’assurer que l’environnement est classé non dangereux avant de débrancher l'équipement.

• Couper le courant ou s'assurer que l’environnement est classé non dangereux avant 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 fournis avec ce produit.

• La substitution de composants peut rendre cet équipement inadapté à une utilisation en environnement de Classe I, Division 2.

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

Publication 1794-IN123B-EN-P - May 2009

2 FLEX I/O 240V AC Digital Input and Output Modules

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.

Install Your Digital Module

Description Description

1 Keyswitch 5 Alignment bar 2 Terminal base 6 Groove 3 Flexbus connector 7 Latching mechanism 4 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

2. Make certain the flexbus connector (3) is pushed all the way to the left to

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

4. Position the module (4) with its alignment bar (5) aligned with the groove

5. Press firmly and evenly to seat the module in the ter minal base unit. The

Do not remove or replace a Terminal Base unit when power is applied. Interruption of the backplane can result in unintentional operation or machine motion.

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.

required for this type of module.

connect with the neighboring terminal base/adapter.

You cannot install the module unless the connector is fully extended.

align properly with the connector in the terminal base.

(6) on the terminal base.

module is seated when the latching mechanism (7) is locked into the module.

Connect Wiring for your 1794-IM16 Module

(using a 1794-TBN Terminal Base)

1. Connect individual input wiring to terminals 0...15 on the 16-33 row (B),

and on the 34-51 row (C) as indicated in Table 1. Auxiliary terminal blocks are required to distribute 240V AC power (L1) to each device.

2. Connect 240V AC power (L1) to terminal 34 on the 34-51 row (C).

3. Connect 240V AC common (L2) to terminal 16 on the 16-33 row (B).

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

terminal 51 (240V AC L1) on this base unit to ter minal 34 on the next base unit.

5. If continuing AC common to the next base unit, connect a jumper from terminal 33 (240V common L2) on this base unit to terminal 16 on the

next base unit.

Table 1 Wiring Connections for 1794-IM16 and 1794-OM16

1794-IM16 1794-OM16

1794-TBN 1794-TBN, 1794-TBNF

Input

Input 0 B-0 Output 0 B-0 Input 1 C-1 Output 1 C-1 Input 2 B-2 Output 2 B-2 Input 3 C-3 Output 3 C-3 Input 4 B-4 Output 4 B-4 Input 5 C-5 Output 5 C-5 Input 6 B-6 Output 6 B-6 Input 7 C-7 Output 7 C-7 Input 8 B-8 Output 8 B-8 Input 9 C-9 Output 9 C-9 Input 10 B-10 Output 10 B-10 Input 11 C-11 Output 11 C-11 Input 12 B-12 Output 12 B-12 Input 13 C-13 Output 13 C-13 Input 14 B-14 Output 14 B-14 Input 15 C-15 Output 15 C-15 Input 0 B-0 Output 0 B-0 240V AC L1 Power terminals C-34 and C-51 are intern ally connected together. Connect 240V AC L1

240V AC L2 Common terminals B-16 and B-3 3 are internally connected together. Connect 240V AC

(1)

Auxiliary terminal blocks are required to distribute 240V AC power L1 to each device.

(2)

Auxiliary terminal blocks are required to connect the associated L2 common for each channel.

Input Terminal

to C-34

common L2 to terminal B-16

(1)

Output

Output Terminal

(2)

1794-TBN Terminal Base Wiring for 1794-IM16 and 1794-OM16

L1 = 240V AC - Connect to terminal C-34 L2 = 240V AC common - Connect to terminal B-16 Use B-33 and C-51 for daisychaining to the next terminal base unit

Even Numbered I/O Terminals 0...14

Odd Numbered I/O Terminals 1...15

6789101112

(1794-TBN shown)

Publication 1794-IN123B-EN-P - May 2009

+ 2 hidden pages