Rockwell Automation 1794-IG16, 1794-OG16 User Manual

Installation Instructions

FLEX I/O 5V dc TTL Digital Input and Output Modules

1794-IG16, 1794-OG16

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 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.

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 publication 60664-1), at altitudes up to 2000 meters (6562 ft) 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 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 publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure.

SGI-1.1 available from your local Rockwell

ATTENTION

WARNING

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.

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.

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 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.

North American Hazardous Location Approval

The following modules are North American Hazardous Location approved: 1794-IG16, 1794-OG16.

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 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-IN119A-EN-P - June 2008

2 FLEX I/O 5V dc TTL Digital Input and Output Modules

IMPORTANT

To comply with North American restrictions, all connected I/O must be powered from a source compliant with the following:

Class 2

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

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.

Connect Wiring for your Module

(using a 1794-TB3 or -TB3S Terminal Base)

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

2. Connect the associated input and output devices as indicated in the wiring diagrams.

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.

Table 1 Wiring Connections for 1794-IG16 and 1794-OG16

Channel Signal Power Terminal Common Terminal

0 A-0 C-35 B-17

1 A-1 C-36 B-18

2 A-2 C-37 B-19

3 A-3 C-38 B-20

4 A-4 C-39 B-21

5 A-5 C-40 B-22

6 A-6 C-41 B-23

7 A-7 C-42 B-24

8 A-8 C-43 B-25

9 A-9 C-44 B-26

10 A-10 C-45 B-27

11 A-11 C-46 B-28

12 A-12 C-47 B-29

13 A-13 C-48 B-30

14 A-14 C-49 B-31

15 A-15 C-50 B-32

+V DC C-34 thru C-51 are internally conn ected together.

Common B-16 thru B-33 are internally conn ected together.

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 1 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.

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 ter minal base unit. The module is seated when the latching mechanism (7) is locked into the module.

1794-TB3 and 1794-TB3S Wiring for 1794-IG16

I/O wire

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

5 V

d c

o w e r

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

-V

DC power

Common

wire

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Voltage In +V

Use Belden 8761, or equivalent, shielded wire.

Capacitors shown must be 0.01µF and rated for 2000 Volts (minimum). I/O cable length must be less than 10 meters.

I/O wire

Capacitor

0.01

Inputs

Commons

Voltage

TTL input device

F typical

1794-TB3 and 1794-TB3S Wiring for 1794-OG16

I/O wire

TTL

output device

0.01

5 V

d c

p o w e r

Capacitor

F typical

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

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

-V

DC power

Common

wire

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Volt ag e In +V

Use Belden 8761, or equivalent, shielded wire.

Capacitors shown must be 0.01µF and rated for 2000 Volts (minimum). I/O cable length must be less than 10 meters.

Outputs

Commons

Voltage

-V

Common

Voltage Out +V

(1794-TB3 shown)

-V

Common

(1794-TB3 shown)

Volt ag e Out +V

Publication 1794-IN119A-EN-P - June 2008

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