Allen-Bradley 1756-M02AS Manuale utente

Publication 1756-IN595A-EN-P - March 2004

Installation Instructions

SSI Servo Module

(Catalog Number 1756-M02AS)

The Synchronous Serial Interface (SSI) Servo Module mounts in a

ControlLogix™ chassis and uses a removable terminal block (RTB) to

connect all field-side wiring.

Before you install your module you should have:

•installed and grounded a 1756 chassis and power supply.

•ordered and received an RTB and its components for your

application.

To: See page:

Note the Power Requirements 4

Identifying Module Components 5

Installing the Module 6

Keying the Module & Removable Terminal Block/Interface Module 7

Wiring a Removable Terminal Block (RTB) 8

Wiring to a Servo Module 10

Wiring Registration Sensors 11

Wiring the Home Limit Switch 12

Wiring the OK Contacts 12

Assembling the Removable Terminal Block and the Housing 13

Installing the Removable Terminal Block onto the Module 13

Checking the LED Indicators 14

Removing the Removable Terminal Block from the Module 19

Removing the Module 20

1756-M02AS Specifications 21

Rockwell Automation Support Back Cover

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2SSI Servo Module

Publication 1756-IN595A-EN-P - March 2004

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 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.

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

SHOCK HAZARD Labels may be located on or inside the drive to alert people that dangerous voltage may

be present.

BURN HAZARD Labels may be located on or inside the drive to alert people that surfaces may be

dangerous temperatures.

SSI Servo Module 3

Publication 1756-IN595A-EN-P - March 2004

Environment and Enclosure

Preventing Electrostatic Discharge

ATTENTION 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 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.

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4SSI Servo Module

Publication 1756-IN595A-EN-P - March 2004

Removal and Insertion Under Power

Repeated electrical arcing causes excessive wear to contacts on both the

module and its mating connector. Worn contacts may create electrical

resistance that can affect module operation.

Note the Power Requirements

This module receives power from the 1756 chassis power supply and requires

two sources of power from the backplane:

•700mA at 5.1 V dc

•2.5 mA at 24V dc

Add this current to the requirements of all other modules in this chassis to

prevent overloading the backplane power supply.

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.

SSI Servo Module 5

Publication 1756-IN595A-EN-P - March 2004

Identifying Module Components

You received two components with your order:

•1756-M02AS module

•RTB door label

If you did not receive these components, contact your Rockwell Automation

representative.

This module mounts in a 1756 chassis and uses a separately-ordered RTB or a

Bulletin 1492 Interface Module (IFM)(1) to connect all field-side wiring. This

module uses one of the following RTBs:

•1756-TBCH 36 position Cage clamp RTB

•1756-TBS6H 36 position Spring clamp RTB

Use an extended-depth cover (1756-TBE) for applications with heavy gauge

wiring or requiring additional routing space. When using an IFM, consult the

documentation that came with it to connect wiring.

(1) The ControlLogix system has been agency certified using only the ControlLogix RTBs (i.e. 1756-TBCH,

1756-TBNH, 1756-TBSH and 1756-TBS6H). Any application that requires agency certification of the

ControlLogix system using other wiring termination methods may require application specific approval

by the certifying agency.

IMPORTANT Before you install your module, you should:

•install and ground a 1756 chassis and power supply.

•order and receive an RTB or IFM, and its components, for

your application.

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6SSI Servo Module

Publication 1756-IN595A-EN-P - March 2004

Installing the Module

You can install or remove the module while chassis power is applied.

Repeated electrical arcing causes excessive wear to contacts on both the

module and its mating connector. Worn contacts may create electrical

resistance that can affect module operation.

1. Align the circuit board with the top and bottom chassis guides.

Figure 1 Circuit Board Alignment

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.

20861-M

Printed Circuit Board

SSI Servo Module 7

Publication 1756-IN595A-EN-P - March 2004

2. Slide the module into the chassis until module tabs ‘click’.

Figure 2 Module Locking Tabs

Keying the Module and Removable Terminal Block/Interface

Module

Use the wedge-shaped keying tabs and U-shaped keying bands to prevent

connecting the wrong wires to your module.

Key positions on the module that correspond to unkeyed positions on the

RTB. For example, if you key the first position on the module, leave the first

position on the RTB unkeyed.

1. To key the module, insert the U-shaped band, as shown.

Figure 3 Keying Band

20862-M

Locking Tab

20850–M

U-shaped

bands

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8SSI Servo Module

Publication 1756-IN595A-EN-P - March 2004

2. Push the band until it snaps in place.

3. To key the RTB or IFM, insert the wedge-shaped tab with rounded

edge first, as shown.

Figure 4 Keying Band

4. Push the tab until it stops.

Reposition the tabs to rekey future module applications.

Wiring a Removable Terminal Block (RTB)

Your 1756-M02AS module uses two types of RTBs (each RTB comes with

housing) to connect wiring.

•Cage clamp - Catalog number 1756-TBCH

•Spring clamp - Catalog number 1756-TBS6H

20851–M

Wedge-shaped tab

SSI Servo Module 9

Publication 1756-IN595A-EN-P - March 2004

Connect the wires as shown below.

Figure 5 Connecting to Spring Clamp and Cage Clamp RTBs

Spring Clamp RTB Cage Clamp RTB

20860-M

20859-M

1. Strip 7/16 inch (11mm) maximum

length of wire.

2. Insert the screwdriver into the

inner hole of the RTB.

3. Insert the wire into the

open terminal and

remove the screwdriver.

1. Strip 3/8 inch (9.5mm) maximum

length of wire.

2. Insert the wire into the open terminal.

3. Turn the screw clockwise to close the

terminal on the wire.

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10 SSI Servo Module

Publication 1756-IN595A-EN-P - March 2004

Wiring to a Servo Module

Use the wiring example in the following figure to wire to your module.

Figure 6 Wiring Example

+OUT-0

-OUT-0

+ENABLE-0

-ENABLE-0

DRVFLT-0

CHASSIS

IN_COM

HOME-0.

REG24V-0

REG5V-0

+OK

CHASSIS

+CLOCK-0

-CLOCK-0

+DATA-0

-DATA-0

SSI COM

CHASSIS.

+OUT-1

-OUT-1

+ENABLE-1

-ENABLE-1

DRVFLT-1

CHASSIS

IN_COM

HOME-1.

REG24V-1

REG5V-1

-OK

CHASSIS

+CLOCK-1

-CLOCK-1

+DATA-1

-DATA-1

SSI COM

CHASSIS.

General cable

C0720 To Servo Drive

or valve

To home

limit

switch

To E-stop relay coil

To Servo Drive,

valve or pump

Synchronous

Serial

Interface (SSI)

registration

sensor

43394

General cable

C0721

General cable

C0720

General cable

C0720

General cable

C0722

General cable

C0720

1. This is a general wiring example illustrating Axis 1 wiring only. Other

configurations are possible with Axis wiring identical to Axis 1.

NOTES:

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