Rockwell Automation T8841 User Manual
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PD-T8841
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Trusted
8 Channel RTD FTA
Introduction
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The Trusted
to eight Platinum 100R RTD sensors which may be connected using two or 3-wire configurations.
Each RTD FTA channel may be configured to provide either a scaled current output in the range of
4-20mA, or a scaled voltage output in the range of 1-5V dc. The RTD FTA also provides sensor
excitation and linearisation for each channels.
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8 Channel RTD FTA T8841 provides an interface between a Trusted
Features
• Eight input channels per RTD FTA
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T
System and up
• Industry standard field device connections
• Standard DIN rail compatibility
• Simple installation and connection
• 24V dc operation
• Configurable 2 or 3-wire inputs
• Configurable current or voltage output
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Issue Record
Issue
Number Date Revised by Technical CheckAuthorised by Modification
5 Sep 05 J W Clark Format
6 Nov 07 N Owens A Holgate P Stock Cable advice
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RTD FTA T8841
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RTD FTA T8841
Figure 1 T8841 Layout
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RTD FTA T8841
Table of Contents
1. Description ...................................................................................................................................7
2. System Functions ........................................................................................................................8
2.1. Zero, Gain & Linearisation ...........................................................................................................8
3. Installation....................................................................................................................................8
3.1. Cable Selection ............................................................................................................................8
4. Assembly Pinout Connections ...................................................................................................11
4.1. RTD1 to RTD8 ...........................................................................................................................11
4.2. IOIF............................................................................................................................................11
4.3. PWR ..........................................................................................................................................11
5. Link Assignments.......................................................................................................................12
5.1. Two Wire Operation...................................................................................................................12
5.2. Voltage Output ...........................................................................................................................12
5.3. Measurement range 0 to 1000C.................................................................................................13
5.4. Measurement range 0 to 3000C.................................................................................................13
6. Specifications.............................................................................................................................14
Figures
Figure 1 T8841 Layout..............................................................................................................................3
Figure 2 Single Channel Circuit ................................................................................................................7
Figure 3 Typical configuration...................................................................................................................9
Figure 4 Configuration using VFTA ........................................................................................................10
Table s
Table 1 RTD Connections ......................................................................................................................11
Table 2 IOIF Connections.......................................................................................................................11
Table 3 PWR Connections .....................................................................................................................11
Table 4 Two Wire Link Assignments ......................................................................................................12
Table 5 Voltage Output Link Assignments .............................................................................................12
Table 6 Range 0 to 100 deg C Link Assignments ..................................................................................13
Table 7 Range 0 to 300 deg C Link Assignments ..................................................................................13
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RTD FTA T8841
Notice
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Disclaimer
The illustrations, figures, charts, and layout examples in this manual are intended solely to illustrate the
text of this manual.
The user of, and those responsible for applying this equipment, must satisfy themselves as to the
acceptability of each application and use of this equipment.
This document is based on information available at the time of its publication. While efforts have been
made to be accurate, the information contained herein does not purport to cover all details or variations
in hardware or software, nor to provide for every possible contingency in connection with installation,
operation, or maintenance. Features may be described herein which are present in all hardware or
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respect to, and assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of
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Issue 6 Nov 07 PD-T8841 5
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