Rockwell Automation 1771-IFFA User Manual

Fast Analog Input Module

Cat. No. 1771-IFF Series A

Installation Instructions

Contents

Use this document as a guide when installing the 1771-IFF series A fast analog
input module.

To See page

Important User Information 1

North American Hazardous Location Approval 4

Understand Product Compatibilty 5

Calculate Power Requirements 6

Determine Module Placement in the I/O Chassis 6

Set the Simulation Jumper 7

Set the Configuration Jumpers 7

Key the Backplane Connector 8

Install the Module and Field Wiring Arm 8

Connect Wiring to the Field Wiring Arm 9

Grounding 13

Configure the Module 14

Interpret Status Indicators 16

Troubleshooting 17

Specifications 18

Important User Information

1 Publication 1771-IN046B-EN-P - December 2003

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.

2 Fast Analog Input Module

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

Publication 1771-IN046B-EN-P - December 2003

Fast Analog Input Module 3

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

dus

trial equipment according to IEC/CISPR

in
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"

m

equip
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.

ent. It must be mounted within an enclosure

See NEMA Standards publication 250 and IEC

u

blication 60529, as applicable, for explanations of

p
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.

Publication 1771-IN046B-EN-P - December 2003

4 Fast Analog Input Module

North American Hazardous Location Approval

This 1771-IFF series A module is hazardous location approved.

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.

EXPLOSION HAZARD

WARNING

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

•Do not disconnect
connections to this equ ipment
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.

RISQUE D’EXPLOSION

AVERTISSEMENT

•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 1771-IN046B-EN-P - December 2003

Fast Analog Input Module 5

Understand Product Compatibilty

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.

The 1771-IFF module can be used with any 1771 I/O chassis. Compatibility
and data table usage is listed below.

Catalog
Number

Use of Data Table Compatibility

Image
Input
Bits

Output
Image
Bits

Read
Block
Words

Write
Block
Words

Addressing Chassis

1/2- Slot 1-Slot 2-Slot

Series

1771-IFF/A 8 8 24 41 Y Y Y A, B
A = Compatible with 1771-A1, -A2, -A4

B = Compatible with 1771-A1B, -A2B, -A3B, -A3B1, -A4B
Y = Compatible without restriction

ATTENTION

Do not use this module with Cat. No. 1771-AL PLC-2/20
or 2/30 Local Adapter.

Publication 1771-IN046B-EN-P - December 2003

6 Fast Analog Input Module

Calculate Power Requirements

Determine Module Placement in the I/O Chassis

The module receives its power through the 1771 I/O power supply and
requires 500mA from the backplane.

Add this current to the requirements of all other modules in the I/O chassis to
prevent overloading the chassis backplane and/or backplane power supply.

ATTENTION

Place your module in any slot of the chassis except for the extreme left slot.
This slot is reserved for PC processors or adapter modules.

Group your modules to minimize adverse affects from radiated electrical noise
and heat. We recommend the following:

• Group analog input and low voltage dc modules away from ac modules

or high voltage dc modules to minimize electrical noise interference.

• Do not place this module in the same I/O group with a digital

high-density I/O module when using 2-slot addressing. This module
uses a byte in both the input and output image tables for block transfer.

Do not insert or remove modules from the I/O chassis
while system power is ON. Failure to observe this rule
could result in damage to the module circuitry.

The 1771-IFF is a modular component of the 1771 I/O system requiring a
properly installed system chassis. Refer to publication 1771-IN075 for detailed
information on acceptable chassis, proper installation and grounding
requirements. Limit the maximum adjacent slot power dissipation to 10W
or less.

Publication 1771-IN046B-EN-P - December 2003