Rockwell Automation Trusted T8834 User manual

PD-T8834 Trusted
Rockwell Automation Publication PD-T8834 Issue 3
Trusted 20 Channel Isolated AI/DI FTA External
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Product Overview
The Trusted® 20 Channel Isolated Analogue Input / Digital Input (AI/DI) Field Termination Assembly
(FTA), Part Number: T8834, is designed to act as the main interface between a field device
generating a 4 mA - 20 mA signal and the Isolated Analogue Input Module, Part Number: T8433.
Part Number: T8834 is required where the field device signal is ranged down to 0 mA or the device
must be powered by the FTA.
Features:
•20 isolated input channels per FTA.
•Standard DIN rail compatibility.
•Simple installation and connection.
•Versatile circuit operation.

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Rockwell Automation Publication PD-T8834 Issue 3 i
PREFACE
In no event will Rockwell Automation be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment. The examples given in this manual are
included solely for illustrative purposes. Because of the many variables and requirements related to
any particular installation, Rockwell Automation does not assume responsibility or reliability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, with respect to use of information, circuits,
equipment, or software described in this manual.
All trademarks are acknowledged.
DISCLAIMER
It is not intended that the information in this publication covers every possible detail about the
construction, operation, or maintenance of a control system installation. You should also refer to
your own local (or supplied) system safety manual, installation and operator/maintenance manuals.
REVISION AND UPDATING POLICY
This document is based on information available at the time of its publication. The document
contents are subject to change from time to time. The latest versions of the manuals are available at
the Rockwell Automation Literature Library under "Product Information" information "Critical
Process Control & Safety Systems".
TRUSTED RELEASE
This technical manual applies to Trusted Release: 3.6.1.
LATEST PRODUCT INFORMATION
For the latest information about this product review the Product Notifications and Technical Notes
issued by technical support. Product Notifications and product support are available at the Rockwell
Automation Support Centre at
http://rockwellautomation.custhelp.com
At the Search Knowledgebase tab select the option "By Product" then scroll down and select the
Trusted product.
Some of the Answer ID’s in the Knowledge Base require a TechConnect Support Contract. For more
information about TechConnect Support Contract Access Level and Features please click on the
following link:
https://rockwellautomation.custhelp.com/app/answers/detail/a_id/50871
This will get you to the login page where you must enter your login details.

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ii Issue 3 Rockwell Automation Publication PD-T8834
IMPORTANT A login is required to access the link. If you do not have an account then you can create one
using the "Sign Up" link at the top right of the web page.
DOCUMENTATION FEEDBACK
Your comments help us to write better user documentation. If you discover an error, or have a
suggestion on how to make this publication better, send your comment to our technical support
group at http://rockwellautomation.custhelp.com

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Rockwell Automation Publication PD-T8834 Issue 3 iii
SCOPE
This manual specifies the maintenance requirements and describes the procedures to assist
troubleshooting and maintenance of a Trusted system.
WHO SHOULD USE THIS MANUAL
This manual is for plant maintenance personnel who are experienced in the operation and
maintenance of electronic equipment and are trained to work with safety systems.
SYMBOLS
In this manual we will use these notices to tell you about safety considerations.
SHOCK HAZARD: Identifies an electrical shock hazard. If a warning label is fitted, it
can be on or inside the equipment.
WARNING: Identifies information about practices or circumstances that can cause
an explosion in a hazardous environment, which can cause injury or death,
property damage or economic loss.
ATTENTION: Identifies information about practices or circumstances that can cause
injury or death.
CAUTION: Identifies information about practices or circumstances that can cause
property damage or economic loss.
BURN HAZARD: Identifies where a surface can reach dangerous temperatures. If a
warning label is fitted, it can be on or inside the equipment.
This symbol identifies items which must be thought about and put in place when
designing and assembling a Trusted controller for use in a Safety Instrumented
Function (SIF). It appears extensively in the Trusted Safety Manual.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.
NOTE Provides key information about the product or service.
TIP Tips give helpful information about using or setting up the equipment.

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WARNINGS AND CAUTIONS
WARNING: EXPLOSION RISK
Do not connect or disconnect equipment while the circuit is live or unless the area is
known to be free of ignitable concentrations or equivalent
AVERTISSEMENT - RISQUE D’EXPLOSION
Ne pas connecter ou déconnecter l’équipement alors qu’il est sous tension, sauf si
l’environnement est exempt de concentrations inflammables ou équivalente
MAINTENANCE
Maintenance must be carried out only by qualified personnel. Failure to follow these
instructions may result in personal injury.
CAUTION: RADIO FREQUENCY INTERFERENCE
Most electronic equipment is influenced by Radio Frequency Interference. Caution
should be exercised with regard to the use of portable communications equipment
around such equipment. Signs should be posted in the vicinity of the equipment
cautioning against the use of portable communications equipment.
CAUTION:
The module PCBs contains static sensitive components. Static handling precautions
must be observed. DO NOT touch exposed connector pins or attempt to dismantle a
module.

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Rockwell Automation Publication PD-T8834 Issue 3 v
ISSUE RECORD
Issue Date Comments
1 Oct 05 Initial Issue
2 Aug 06 Terminations
3 Jun 16 Rebranded and updated to incorporate IEEE standards with correction of
typographical errors and also standardise the Relative Humidity Range
and Operating Temperature statements in the Specification Section.

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Trusted 20 Channel Isolated AI/DI FTA External Powered Table of Contents
Rockwell Automation Publication PD-T8834 Issue 3 1
Table of Contents
1. Description .............................................................................................................3
2. Installation.............................................................................................................5
3. Associated Cable Selection.......................................................................................7
4. Assembly Pinout Connections ..................................................................................9
4.1. CON1 Connections ...................................................................................................................... 9
4.2. TB1 Connections .......................................................................................................................11
4.3. TB2 Connections .......................................................................................................................12
4.4. TB3 Connections .......................................................................................................................13
5. Field Circuit Design................................................................................................15
6. Specifications........................................................................................................19

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