Allen-Bradley 1734-OB2 Manuale utente

POINT I/O is a trademark of Rockwell Automation

DeviceNet is a trademark of ODVA, Inc. Publication 1734-IN018A-EN-P - November 2004

Installation Instructions

POINT I/O Output Module

(Cat. No. 1734-OB2, -OB4 and -OB8 Series C)

Description Description

1Mounting Base16RTB Removal Handle

2Mechanical Keying (orange) 7Removable Terminal Block (RTB)1

3Module Wiring Diagram 8DIN Rail Locking Screw (orange)

4Module Locking Mechanism 9Slide-in Writable Label

5Insertable I/O Module 10 Interlocking Side Pieces

1Wiring Base Assembly consists of item 1) mounting base, 1734-MB and item 7) removable

terminal block, 1734-RTB or -RTBS.

24VDC

Source

Output

Module

Status

Network

Status

1734

OB4E

NODE:

2POINT I/O Output Module

Publication 1734-IN018A-EN-P - November 2004

This Series C product can be used with DeviceNet and PROFIBUS

adapters. It can be used with ControlNet and Ethernet adapters using

RSLogix 5000, version 11 (or higher) software.

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.

POINT I/O Output Module 3

Publication 1734-IN018A-EN-P - November 2004

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.

ATTENTION 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

IMPORTANT Identifies information that is critical for successful

application and understanding of the product.

Important User Information

4POINT I/O Output Module

Publication 1734-IN018A-EN-P - November 2004

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.

ATTENTION POINT I/O is grounded through the DIN rail to chassis

ground. Use zinc plated, yellow chromated steel DIN rail

to assure proper grounding. Using other DIN rail

materials (e.g. aluminum, plastic, etc.) which can corrode,

oxidize or are poor conductors can result in improper or

intermittent platform grounding.

POINT I/O Output Module 5

Publication 1734-IN018A-EN-P - November 2004

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.

ATTENTION 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.

•When not in use, store the equipment in

appropriate static-safe packaging.

6POINT I/O Output Module

Publication 1734-IN018A-EN-P - November 2004

Installing the Mounting Base

To install the mounting base on the DIN rail, proceed as follows.

1. Position the mounting base vertically above the installed units

(adapter, power supply or existing module.

2. Slide the mounting base down allowing the interlocking side pieces to

engage the adjacent module or adapter.

3. Press firmly to seat the mounting base on the DIN rail. The mounting

base will snap into place.

4. To remove the mounting base from the DIN rail, remove the module,

and use a small bladed screwdriver to rotate the base locking screw to

a vertical position. This releases the locking mechanism. Then lift

straight up to remove.

Installing the I/O Module

The module can be installed before, or after base installation. Make sure that

the mounting base is correctly keyed before installing the module into the

mounting base. In addition, make sure the mounting base locking screw is

positioned horizontal referenced to the base.

1. Using a bladed screwdriver, rotate the keyswitch (2) on the

mountingbase clockwise until the number required for the type of

module being installed aligns with the notch in the base.

2. Make certain the DIN rail locking screw is in the horizontal position.

(You cannot insert the module if the locking mechanism is unlocked.)

3. Insert the module straight down into the mounting base and press to

secure. The module will lock into place.

WARNING 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.

POINT I/O Output Module 7

Publication 1734-IN018A-EN-P - November 2004

Installing the Removable Terminal Block (RTB)

A removable terminal block is supplied with your wiring base assembly. To

remove, pull up on the RTB handle. This allows the mounting base to be

removed and replaced as necessary without removing any of the wiring. To

reinsert the removable terminal block, proceed as follows.

1. Insert the end opposite the handle into the base unit. This end has a

curved section that engages with the wiring base.

2. Rotate the terminal block into the wiring base until it locks itself in

place.

3. If an I/O module is installed, snap the RTB handle into place on the

module.

WARNING When you connect or disconnect the Removable

Terminal Block (RTB) with field side power applied, 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.

8POINT I/O Output Module

Publication 1734-IN018A-EN-P - November 2004

Removing a Mounting Base

To remove a mounting base, you must remove any installed module, and the

module installed in the base to the right. Remove the removable terminal

block (if wired).

1. Unlatch the RTB handle on the I/O module.

2. Pull on the RTB handle to remove the removable terminal block.

3. Press on the module lock on the top of the module.

4. Pull on the I/O module to remove from the base.

5. Repeat steps 1, 2, 3 and 4 for the module to the right.

6. Use a small bladed screwdriver to rotate the orange base locking

screw to a vertical position. This releases the locking mechanism.

7. Then lift straight up to remove.

WARNING When you connect or disconnect the Removable

Terminal Block (RTB) with field side power applied, 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.

WARNING 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.

POINT I/O Output Module 9

Publication 1734-IN018A-EN-P - November 2004

Communicating with Your Module

I/O messages are sent to (consumed) and received from (produced) the

POINT I/O modules. These messages are mapped into the processor’s

memory. This POINT I/O output module consumes 1 byte of I/O data

(scanner Tx).

Default Data Map for the 1734-OB2 Output Module

Message size: 1 Byte

Default Data Map for the 1734-OB4 Output Module

Message size: 1 Byte

Default Data Map for the 1734-OB8 Output Module

Message size: 1 Byte

7 6 5 4 3 2 1 0

Consumes

(scanner Tx)

Not used Ch1 Ch0 Channel state

Where: 0 = Off, 1 = On

7 6 5 4 3 2 1 0

Consumes

(scanner Tx)

Not used Ch3 Ch2 Ch1 Ch0 Channel

state

Where: 0 = Off, 1 = On

7 6 5 4 3 2 1 0

Consumes

(scanner Tx)

Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Channel

state

Where: 0 = Off, 1 = On

10 POINT I/O Output Module

Publication 1734-IN018A-EN-P - November 2004

Wiring the Protected Output Modules

24VDC

Source

Output

Module

Status

Network

Status

1734

OB2

NODE:

24VDC

Source

Output

Module

Status

Network

Status

1734

OB4

NODE:

24VDC

Source

Output

Module

Status

Network

Status

1734

OB8

NODE:

42016

Module Status

Network Status

Status of Output 0

Status of Output 1

Status of Output 2

Status of Output 3

Output 0

Output 1

Output 0

Output 2

Output 1

Output 3

C = Common

V = Supply

1734-OB2 1734-OB4

Output 0

Output 2

Output 1

Output 3

Output 4

Output 6

Output 5

Output 7

1734-OB8

Status of Output 0 & 4

Status of Output 1 & 5

Status of Output 2 & 6

Status of Output 3 & 7

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