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(Cat. No. 1794-IR8)

 

This module mounts on a 1794 terminal base unit.

1. Rotate keyswitch (1) on terminal base unit (2) clockwise to position 

3

as required for this type of module.

2. Make certain the flexbus connector (3) is pushed all the way to the left

to connect with the neighboring terminal base/adapter. You cannot
install the module unless the connector is fully extended.

3. Make sure that the pins on the bottom of the module are straight so

they will align properly with the connector in the terminal base unit.

4. Position the module (4) with its alignment bar (5) aligned with the

groove (6) on the terminal base.

5. Press firmly and evenly to seat the module in the terminal base unit.

The module is seated when the latching mechanism (7) is locked into
the module.

Installation Instructions

Allen-Bradley

Summary of Contents for FLEX I/O 1794-IR8

Page 1: ...er You cannot install the module unless the connector is fully extended 3 Make sure that the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit 4 Position the module 4 with its alignment bar 5 aligned with the groove 6 on the terminal base 5 Press firmly and evenly to seat the module in the terminal base unit The module is seated ...

Page 2: ...ective This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following standards in whole or in part documented in a technical construction file EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment EN 50082 2 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Low...

Page 3: ...e 9501 3Ćwire Less than 100ft 30 5m with normal humidity 9533 Over 100ft 30 5m high humidity1 83503 1 Greater than 55 for more than 8 hours 4 Connect individual channel shield returns to the associated terminal on row B for 1794 TB3 and TB3S or row C for the 1794 TB3T or TB3TS as shown in the wiring table 5 Connect 24V dc to terminal 34 on the 34 51 row C ATTENTION To reduce susceptibility to nois...

Page 4: ...31 32 33 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 34 1794ĆTB3 ĆTB3S ĆTB3T 0 15 34 51 16 33 A B C RTD 1794ĆTB3 and ĆTB3S Terminal Base Units RTD Channel High Signal Terminal Low Signal Terminal Signal Return1 Shield Return 0 0 1 17 18 1 2 3 19 20 2 4 5 21 22 3 6 7 23 24 4 8 9 25 26 5 10 11 27 28 6 12 13 29 30 7...

Page 5: ... 17 19 21 23 25 27 29 31 and 33 24V dc power 34 and 51 1 Terminals 39 to 46 are chassis ground Example of 2Ć 3Ć and 4Ćwire RTD Wiring to a 1794ĆTB3 Base Unit 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 34 1794ĆTB3 0 15 34 51 16 33 A B C 4ĆWire RTD 2ĆWire RTD 3ĆWi...

Page 6: ...iring to a 1794ĆTB3T Base Unit 1794ĆTB3T 0 15 34 51 16 33 A B C 3ĆWire RTD 2ĆWire RTD 4ĆWire RTD Attention Indicators 3 A B _ _ _ _ _ _ _ _ A Status Indicator indicates diagnostics results and configuration status B Insertable label for writing individual input designations ...

Page 7: ...1 00 0 Reserved 1 Channel 0 Input Data 2 Channel 1 Input Data 3 Channel 2 Input Data 4 Channel 3 Input Data 5 Channel 4 Input Data 6 Channel 5 Input Data 7 Channel 6 Input Data 8 Channel 7 Input Data 9 Overrange Bits Underrange Bits 10 0 0 0 0 0 Bad Cal Cal Dne Cal Rng RIUP Critical Error Bits Pwr Up Res 0 0 Write Words Dec Bit Word 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 0 8Ćbit Calibrati...

Page 8: ...ite Word 1 Bit 03 02 01 00 Channel 0 0 0 0 0 Resistance default 0 0 0 1 No sensor connected do not scan 0 0 1 0 100 ohm Pt α 0 00385 Euro 200 to 870oC 0 0 1 1 100 ohm Pt α 0 003916 U S 200 to 630oC 0 1 0 0 200 ohm Pt α 0 00385 Euro 200 to 630oC 0 1 0 1 500 ohm Pt α 0 00385 Euro 200 to 630oC 0 1 1 0 Reserved 0 1 1 1 10 ohm Copper 200 to 260oC 1 0 0 0 120 ohm Nickel 60 to 250oC 1 0 0 1 100 ohm Nicke...

Page 9: ...24V dc FLEX I O RTD Input Module 9 Allen Bradley ...

Page 10: ...nĆhazardous locations only The products having the appropriate CSA markings that is Class I Division 2 Groups A B C D are certified for use in other equipment where the suitability of combination that is application or use is determined by the CSA or the local inspection office having jurisdiction Due to the modular nature of a PLC control system the product with the highest temperature rating det...

Page 11: ... en vigueur est indiquée par l étiquette du produit et non par des affirmations dans la documentation à l usage des utilisateurs Exemple d étiquette de certification d un produit par la CSA I Pour satisfaire à la certification de la CSA dans des endroits dangereux les informations suivantes font partie intégrante de la documentation des produits industriels de contrôle AllenĆBradley certifiés par ...

Page 12: ... lescomposants Avant de débrancher l équipement couper le courant ou s assurer que l emplacement est désigné non dangereux Avant de débrancher les connecteurs couper le courant ou s assurer que l emplacement est reconnu non dangereux Attacher tous connecteurs fournis par l utilisateur et reliés aux circuits externes d un appareil AllenĆBradley à l aide de vis loquets coulissants connecteurs fileté...

Page 13: ...binary Normal Mode Noise Rejection 60db 60Hz for A D filter cutoff 10Hz Accuracy without calibration at low humidity Normal mode 0 05 Full Scale maximum Enhanced mode 0 01 Full Scale typical Common Mode Rejection 120db 60Hz 100db 50Hz with A D filter cutoff 10Hz Common Mode Voltage 0V between channels common return System Throughput Normal mode Enhanced mode Programmable from 28ms channel to 325ms...

Page 14: ...e greater than 100ft 30 5m high humidity 55 for 8 hrs Belden 83503 External dc Power Supply Voltage Voltage Range Supply Current 24V dc nominal 19 2 to 31 2V dc includes 5 ac ripple 19 2V dc for ambient temperatures 55oC 24V dc for ambient temperatures 55oC 31 2V dc for ambient temperatures 40oC See derating curve 140mA 24V dc Dimensions Inches Millimeters 1 8H x 3 7W x 2 1D 45 7 x 94 0 x 53 3 Env...

Page 15: ...Groups A B C D certified UL listed CE marked for all applicable directives User Manual Publication 1794Ć6 5 4 19 2 24 0 31 2 25oC 40oC 50oC 55oC 0oC Safe operating area The area within the curve represents the safe operating range for the module under various conditions of user supplied 24V dc supply voltages and ambient temperatures Allen Bradley ...

Page 16: ...mation representative visiting www theautomationbookstore com and placing your order calling 1 800 963 9548 USA Canada or 001 330 725 1574 Outside USA Canada The publication number of the user manual for your product is listed under Specifications in this installation instruction Publication 1794Ć5 22 May 1999 Supersedes publication 1794Ć5 22 September 1996 PN955126 12B Copyright 1999 AllenĆBradle...

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