Installation Instructions



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Publication 1734-IN028B-EN-P - April 2010



Installation Instructions

POINT I/O One-piece Terminal Bases

Catalog Numbers 1734-TOP, 1734-TOPS, 1734-TOP3, 1734-TOP3S

About This Publication

Read this publication for information about these terminal bases.   

   

      


Topic

Page

About This Publication

1

Important User Information



2

Environment and Enclosure

3

Prevent Electrostatic Discharge



4

Install a Base

5

Remove a Base



6

Specifications

7

Catalog Number

Number of Terminations

Termination Type

1734-TOP


8

Screw-clamp

1734-TOPS

8

Spring-clamp



1734-TOP3

12

Screw-clamp



1734-TOP3S

12

Spring-clamp



2

POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010

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://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, when necessary, we use notes to make you 

aware of safety considerations.



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.



IMPORTANT

Identifies information that is critical for successful application 

and understanding of the product.


                                           POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010



Environment and Enclosure

IMPORTANT

Identifies information about practices or circumstances that can 

lead to personal injury or death, property damage, or economic 

loss. Attentions help you to identify a hazard, avoid a hazard and 

recognize the consequences.

SHOCK HAZARD

Labels may be located on or inside the equipment, for example, a 

drive or motor, to alert people that dangerous voltage may be 

present.


BURN HAZARD

Labels may be located on or inside the equipment, for example, a 

drive or motor, to alert people that surfaces may be dangerous 

temperatures.



ATTENTION

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 difficulties with electromagnetic 

compatibility in residential and other environments due to 

conducted and radiated disturbances.

 

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, 

Rockwell Automation publication 

1770-4.1


, for additional 

installation requirements.

NEMA Standard 250 and IEC 60529, as applicable, for 



explanations of the degrees of protection provided by 

different types of enclosure.



4

POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010

Prevent 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.

• Use a static-safe workstation, if available. 

• Store the equipment in appropriate static-safe packaging 

when not in use.

ATTENTION

POINT 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.

ATTENTION

Do not wire more than 2 conductors on any single terminal.



                                           POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010



Install a Base 

To install a base on DIN rail, proceed as follows, referring to the figures to identify major parts 

of the base.

Wiring Block

Mechanical 

Keying 


(Orange)

44047


1734-TOP and 1734-TOPS

DIN-rail Locking Screw (Orange)

Handle

Interlocking Side Pieces



44050

Wiring Block

DIN-rail Locking Screw (Orange)

Mechanical 

Keying 

(Orange)


Handle

Interlocking Side Pieces



1734-TOP3 and 1734-TOP3S

6

POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010

Refer to your I/O module user manual for keying information and informatin on how to 

configure your module. 

1.

Position the base vertically above the installed units, such as an adapter, power 

supply, or existing module. 

2.

Slide the base down, allowing the interlocking side pieces to engage the adjacent 

installed unit.

3.

Press firmly to seat the base on the DIN rail until the base snaps into place. 



4.

Verify that the DIN-rail locking screw is in a horizontal, locked position before 

inserting an I/O module.

Remove a Base 

To remove a wiring base from the DIN rail, you must remove the module installed to the right of 

the base, proceeding as follows.

1.

Squeeze the module locking mechanism of the module to the right of the base, 

pulling up to remove the module. 

2.

Turn the orange locking screw to a vertical position to unlock the base from the 

DIN rail. 

3.

Slide the base up to release it from its mating units.  

 

WARNING

Explosion Hazard

 

Do not disconnect or replace component unless power is 



switched off or area is known to be nonhazardous. Do not 

pull on the installed wiring to remove a terminal base. A 

shock hazard exists if power is applied to the terminal base.

DIN-rail locking screw is in 

horizontal, locked position. 

DIN-rail locking screw is in 

vertical, unlocked position. 


                                           POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010



Specifications

One-piece Terminal Bases - 

 

1734-TOP, 1734-TOPS, 1734-TOP3, 1734-TOP3S 



Attribute

Value

Dimensions 

(HxWxD), 

Approx.


1734-TOP, 1734-TOPS  49 x 12 x 144 mm (1.93 x 0.47 x 5.67 in.)

 

1734-TOP3, 1734-TOP3S   49 x 12 x 168 mm (1.93 x 0.47 x 6.61 in.)



Weight, 

Approx.


1734-TOP 63.8 g (2.25 oz), 1734-TOP3 79.2 g (2.79 oz), 

 

1734-TOPS 55.68 g (1.96 oz), 1734-TOP3S 66.8 g (2.36 oz)



Wire Size

0.25... 2.5 mm² (22...14 AWG) solid or stranded copper wire rated at 75 °C 

(167 °F ), or greater, 1.2 mm (3/64 in.) insulation max 

Category


Dependent on I/O module installed in terminal base

(1)


(1)

Use this conductor category information for planning conductor routing as described in Industrial 

Automation Wiring and Grounding Guidelines, publication 1770-4.1.

Supply voltage

300V max terminal voltage

Supply power

8A max terminal current

Isolation 

Voltage

Capable of 240V (continuous), Reinforced Insulation Type, or the lesser of the 



installed module.

Enclosure Type 

Rating

None (open-style)



Field Power 

Bus Supply 

Voltage

28.8V DC, 120/240V AC



Terminal Base 

Screw Torque

1734-TOP and 1734-TOP3 0.6 Nm (7 lb-in)

Terminal block 

torque

0.4Nm (3.5 lb-in) for 1734-TOP and 1734-TOP3 only



8

POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010

Environmental Specifications

Attribute

Value

Temperature, 

operating

IEC 60068-2-1 (Test Ad, Operating Cold),

 

IEC 60068-2-2 (Test Bd, Operating Dry Heat),



 

IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

 

-20…60 °C (-4…140 °F)



Temperature, 

nonoperating

IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),

 

IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),



 

IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):

 

-40…85 °C (-40…185 °F)



Relative humidity

IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

 

5...95% noncondensing



Shock, operating

IEC 60068-2-27 (Test Ea, Unpackaged Shock): 30 g

Shock, nonoperating

IEC 60068-2-27 (Test Ea, Unpackaged Shock): 50 g

Vibration

IEC 60068-2-6 (Test Fc, Operating): 5 g @ 10…500 Hz



Certifications

Certification (when the 

product is marked)

(1)

Value

 C-Tick


  Australian Radiocommunications Act, compliant

 

  with: AS/NZS CISPR 11; Industrial Emissions



c-UR-us

UL Recognized Component Industrial Control Equipment, certified 

for US and Canada. See UL File E65584.

CE  


European Union 2004/108/EC EMC Directive, compliant with: 

 

   EN 61326-1; Meas./Control/Lab., Industrial Requirements



 

   EN 61000-6-2; Industrial Immunity

 

   EN 61000-6-4; Industrial Emissions



 

   EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

 

European Union 2006/95/EC LVD, compliant with:



 

   EN 61131-2; Programmable Controllers (Clause 11).

(1)

See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, 



and other certification details.

                                           POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010



Notes:

10

POINT I/O One-piece Terminal Bases 

Publication 1734-IN028B-EN-P - April 2010

Notes:


                                           POINT I/O One-piece Terminal Bases 11 

Publication 1734-IN028B-EN-P - April 2010



Notes:

Publication 1734-IN028B-EN-P - April 2010

PN 75026


Supersedes Publication 1734-IN028A-EN-P - February 2006

Copyright © 2010 Rockwell Automation, Inc. All rights reserved. 

Printed in the U.S.A

Allen-Bradley, POINT I/O, and Rockwell Automation are trademarks of Rockwell 

Automation, Inc. Trademarks not belonging to Rockwell Automation are property 

of their respective companies.



Document Outline

  • 1734-IN028B-EN-P POINT I/O One-piece Terminal Bases Installation Instructions
    • About This Publication
    • Environment and Enclosure
    • Install a Base
    • Remove a Base
    • Specifications
  • Back Cover


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