Rockwell Automation 1746-INT4 User Manual

Quick Start

Thermocouple/mV Isolated Input Module

Cat. No. 1746-INT4

Use this document as a guide to install and wire the 1746-INT4 m odule. If you need more detailed information, refer to the Thermocouple/mV Isolated Input Module

User Manual, publication 1746-6.16.

For this info rmation See page

Important User Information 2 Prevent Electrostatic Discharge 3 How to Get the Related User Manual 4 Unpack the Module 4 Review Power Requirements 4 Install the Module and Connect the Thermocouples 5 Configure the Software 12 Set Up Channel 0 13 Program the Transfer of the Configuration Word 14 Write Ladder Logic to Process Input Data 15 Apply Power and Download Your Program 15 Troublshoot the Module 16 Channel Configuration Worksheet 19

For this reference information See page

Specifications 18

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2 Thermocouple/mV Isolated Input Module

WARNING

ATTENTION

IMPORTANT

Important User Information

Because of the variety of uses for the products described in this publication, those

responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.

In no event will R ockwell Automation be responsible or lia ble for indirect or consequential damage resulting from the use or application of these products.

Any illustratio ns, charts, samp le programs, a nd la yout example s shown in this publication are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Rockwell Automation does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

Allen-Bradley and Maintenance of Solid-State Control (available from your loca l Ro ckwel l Aut omati on office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in thi s pu blication.

Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited.

Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard:

publication SGI-1.1, Safety Guidelines for the Application, Installation

IMPORTANT

Publication 1746-QS002B-EN-P - July 2002

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 about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.

Identifies information that is critical for successful application and understanding of the product.

Thermocouple/mV Isolated Input Module 3

ATTENTION

Environment and Enclosure

This equipm ent is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC p ublica tion 6 0664- 1), at altit udes u p to 2000 me ters without derating.

This equipmen t i s co nsidered Group 1, Cl a ss A in dustrial 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 . S ubsequent sect i ons of this publication may contain additional information regarding specific enclosure type rat ings that are required to comply with certain product safety certifications.

See NEMA Standards p ublication 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 Au t oma t ion Wiring and Grounding Guidelines"), for additional installation requirements pertaining to this equipment.

Prevent Electrostatic Discharge

This equipment is sensitive to electrostatic discharge which can cause internal damage and affect normal operation. Follow these guidelines wh en you handle this equipment :

• touch a grounded object to discharge potential static

• wear an approved grounding wrist strap

• 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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How to Get the Related User Manual

The following table describes the related user manual that is available for this module. To order a copy or to view or download an online version, visit The Automation Bookstore at: www.theautomationbookstore.com

For more detailed informa tion about: See this document: Publication number:

Installation, configuration, programming, diagnostics and troubleshooting

Thermocouple.mV Isolated Input Module User Manual

1746-6.16

Unpack the Module

Unpack the module making sure that the contents include:

• module (catalog number 1746-INT4)

• factory-installed removable terminal block with CJC sensors attached

(catalog number 1746-RT32)

• this Quick Start document (publication number 1746-QS002B-EN-P)

If the contents are incomplete, contact your local Rockwell Automation representative for assistance.

Review Power Requi rements

Review the power requirements of the modules drawing power from the chassis power supply.

1. The fixed 2-slot chassis supports 2 1746-INT4 modules. If combining an

INT4 module with a different type of module, refer to Considerations for a Fixed Controller in Chapter 3 of the user manual.

2. For a modular system, compute the total load on the system power supply

using the procedure described in the SLC Installation and Operation Manual

for Modular Controllers (publication number 1747-UM011) or the SLC 500 Family System Overview (publication 1747-SO001).

For more detailed information on these procedures, refer to Chapter 3 (Installation and Wiring) and Appendix A (Module Specifications) of the user manual, publication 1746-6.16.

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Thermocouple/mV Isolated Input Module 5

WARNING

Install the Module and Connect the Thermocouples

If 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.

Insert/remove the module into/from the I/O chassis (slot 1 in this example procedure).

Important:

Thermocouple inputs are highly susceptible to electrical noise. To minimize interference:

Place processor and I/O chassis

in an industrial enclosure.

± Keep signal wires as far from

power and load lines as possible.

Use shielded, twisted-pair

thermocouple extension wire. Ground each shield only at one end. Use correct thermocouple polarity. Keep all unshielded leads short. Connect the terminal block GND

(#18) to nearest I/O chassis mtg.

bolt with 12 gauge stranded wire.

card guide

module release, top and bottom

Connect thermocouple wires to channels 0-3. We show an example for channel 0. Make sure both cold junction compensation (CJC) devices are securely attached with correct polarity.

Important:

Ground all thermocouple shields to earth ground at I/O chassis with 3/8º braid wire. See User

CHL 0+

Manual, figure 3.2.

CHL

0±

CHL 1+

1±

CHL

Thermocouple Wire

CJC Device

Terminal Block

+ ±

To install your module into the chassis:

1. Turn off the chassis power supply.

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6 Thermocouple/mV Isolated Input Module

2. Align the circuit board of the thermocouple module with the card guides

located at the top and bottom of the chassis.

3. Slide the module into the chassis until both top and bottom retaining clips

are secured. Apply firm even pressure on the module to attach it to its backplane connector. Never force the module into the slot.

4. Cover unused slots with the card slot filler, catalog number 1746–N2.

5. To remove, press the releases at the top and bottom of the module, and slide

the module out of the chassis slot.

card guides

top and bottom releases

retaining clips

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Thermocouple/mV Isolated Input Module 7

WARNING

Remove/Install the Removable Term inal Block

The module ships with an attached an 18-p osition removable termi nal block (RTB). When you install the module, it is not necessary to remove the RTB. If you ever need to remove it, follow this procedure:

1. Alternately loosen the two retaining screws to avoid cracking the RTB.

CJC sensors

RTB

2. Grasp the RTB at the top and bottom and pull outward and down. When

removing the RTB, be careful not to damage the CJC sensors.

3. Use the write–on label to identify the slot, chassis and module type.

SLOT

MODULE

To install the RTB:

1. Remove power from the SLC 500 chassis.

When you connect or disconnect the Removable Terminal Block (RTB) with field side power applied, 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.

RACK

retaining screws

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8 Thermocouple/mV Isolated Input Module

ATTENTION

2. Make certain the color of the RTB mathces the color band on the module.

Inserting a wired RTB on an incorrect module can damage the module’s circuitry when power is restored.

3. View the write–on label to identify the slot, chassis and module type.

SLOT

MODULE

4. Align the RTB retaining screws with the mating connector on the module. Be

careful not to damage the CJC sensors.

CJC sensors

5. Press the RTB firmly onto the connector contacts.

6. Alternately tighten the two retaining screws to avoid cracking the RTB.

Tighten to a maximum 6-8 inch-pounds.

RACK

retaining screws

RTB

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Thermocouple/mV Isolated Input Module 9

ATTENTION

Wire the RTB

Use the following illustration to wire the RTB:

CJC A+

CJC Assembly

Retaining Screw

CJC A-

Do NOT use these connections

CJC B+ CJC B-

Cold Junction Compensation (CJC)

Do not remove or loosen the cold junction compensating thermistors located on the terminal block. Both thermistors

are critical to ensure accurate thermocouple input readings at each channel. The module will not operate in the

thermocouple mode if a thermistor is removed

Retaining Screw

Channel 0+

Channel 0Channel 1+ Channel 1-

Channel 2+ Channel 2Channel 3+

Channel 3-

spare part catalog number:

n/c

1746-RT32

In case of accidental removal of one or both thermistors (part number A40845-221-01), replace them by connecting them across the CJC terminals located at the top and/or bottom left side of the terminal block. Always con nect the red lug to the (+) terminal (to CJC A+ or CJC B+) as shown below.

Always attach red lug to the CJC+ terminal

CJC Sensor part number A40845-221-01

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10 Thermocouple/mV Isolated Input Module

Wiring Guidelines

Follow these guidelines when planning your system wiring.

• To limit the pickup of electrical noise, keep thermocouple and millivolt

signal wires away from power and load lines.

• For high immunity to electrical noise, use Alpha 5121 (shielded, twisted pai r)

or equivalent wire for millivolt sensors; or use shielded, twisted pair thermocouple extension lead wire specified by the thermocouple manufacturer. Using the incorrect type of thermocouple extension wire or not following the correct polarity may cause invalid readings. See IEEE Std. 518, Section 6.4.2.7 or contact your sensor manufacturer for additional details.

• When trimming cable leads, minimize the length of unshielded wires.

• Ground the shield drain wire at only one end of the cable. The preferred

location is at the I/O chassis ground.

• For maximum noise reduction, use 3/8 inch braid wire to connect cable

shields to the nearest I/O chassis mounting bolt. Then connect the I/O chassis to earth ground. These connections are a requirement regardless of cable type.

• Tighten terminal screws to 6-8 inch-pounds. Excessive tightening can strip

the screw.

• The open–circuit detector generates approximately 20 nano–amperes into

the thermocouple cable. A total lead resistance of 25 ohms (12.5 one–way) will produce 0.5 mV of error.

• Follow system grounding and wiring guidelines found in your SLC 500

Modular Hardware Style User Manual, publication 1747–UM011.

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Thermocouple/mV Isola ted Input Module 11

Preparing and Wiring the Cables

To prepare and connect cable leads and drain wires, follow these steps:

Remove the foil shield and drain wire from sensor-end of the cable

Signal Wires

Extract th e drain wire bu t remove the foil shield, at the module-end of the cable.

1. At each end of the cable, strip some casing to expose individual wires.

2. Trim signal wires to 5–inch lengths beyond the cable casing. Strip about 3/16

inch (4.76 mm) of insulation to expose the ends of the wires.

3. At the module–end of the cables:

- extract the drain wire and signal wires

- remove the foil shield

- bundle the input cables with a cable strap

4. Connect drain wires together and solder them to a 3/8” wire braid, 12” long.

Keep drain wires as short as possible.

5. Connect the 3/8” wire braid to the nearest chassis mounting bolt.

6. Connect the signal wires of each channel to the terminal block.

Drain Wire

Signal Wires

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12 Thermocouple/mV Isolated Input Module

IMPORTANT

7. At the source-end of cables from mV devices (see following figure):

• remove the drain wire and foil shield

• apply shrink wrap as an option

• connect to mV devices keeping the leads short

Make unshielded wires as short as possible.

Wires

3/8

Make unshielded wires as short as possible.

IMPORTANT

Solder drain wires to braid at casing.

Connect I/O chassis bolt to earth ground

Limit braid length to 12” or less. Solder braid to lug on bottom row of I/O chassis

If noise persists, try grounding the opposite end of the cable. Ground one end only.

3/8

Signal Wires

Chnl 0

Chnl 1

Cables

Chnl 2 Chnl 3

n/c

Terminal Block

Configure the Software

With your programming software already loaded and your computer set for off-line programming:

1. Identify the type of SLC processor and operating sytstem on the PROG DIRECTORY FOR PROCESSORS screen.

Publication 1746-QS002B-EN-P - July 2002

2. With the SLC system installed and wired, us the READ CONFIG feature and follow the prompts to configure the I/O.

3. Enter the rack configuration.

4. Select the type of module in each slot. If 1746-INT4 is not listed, enter ID

code 3515 for OTHER at the bottom of the list.

5. Exit and save to file.

Thermocouple/mV Isola ted Input Module 13

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No manual entry of special I/O configuration (SPIO CONFIG) information is required. Module ID code automatically assigns the number of input and output words required by the module. Refer to your configuration software documentation

for more information..

For more detailed information on these procedures, refer to Chapter 5 (Accessing File s to Configur e I / O)of the user manual.

Set Up Channel 0

Determine the operating parameters for channel 0. The following example shows the channel 0 configuration word defined with all defaults (0) except for the channel enable (bit 11-1). The module is installed in slot 1. For details on channel

configuration, refer to the channel configuration worksheet on page 19.

SLC 500 Controller

Data Files

Address

O:1.0 O:1.1 O:1.2 O:1.3

O:1.7

Input Image

ord 0

W W

ord 1

ord 2

ord 3

ord 7

Output Image

(8 words)

Channel 0 Configuration Word

Channel 1 Configuration W Channel 2 Configuration W Channel 3 Configuration W

Calibration W

ords 4, 6, & 7

(reserved)

ord ord ord

ord 5

emperature Units

Unused

Channel Enable

Unused

Open Circuit

000000000000000

Use Default Settings For:

Type

J Thermocouple

Engineering

Units x 1 Data Word = 0 If Open Circuit Degrees

Bit

Celsius

000010000000000

Set this bit (11) to enable channel. Address = O:1.0/11.

Example Settings for Channel 0.

Data Format

Type Input

Bit 0

For more detailed information on these procedures, refer to Chapter 6 (Channel Configuration, Data and Status) of the user manual.

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Program the Transfer of the Configuration Word

Program the transfer of the configuration word (from previous section) to the module:

1. Using the memory map function, create integer file N10. Integer file N10

should contain one element for each channel used. For this example, we used N10:0.

2. Enter configuration parameters for channel 0 (from previous section) into

N10:0. In this example, all the bits of N10:0 are zero except for the channel enable bit (N10:0/11).

3. Program a ladder logic instruction to copy the contents of N10:0 to output

word O:1.0.

Data Table Display of Integer File N10:0

address 15 data 0 address 15 data 0 N10:0 0000 1000 0000 0000

Ladder Logic to Transfer N10:0 to the Module:

First Pass Bit

S:1

] [

COP

COPY FILE Source # N10:0

Dest # O:1.0 Length 1

On power up, the first pass bit (S:1/15) is set for one scan, enabling the COPY instruction to transfer the configuration word to the processor's output image table. From there it is transferred to the module in the processor's I/O scan.

For more detailed information on these procedures, refer to Chapter 7 (Ladder Programming Examples) and Chapter 9 (Application Programming Examples) of the user manual.

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Thermocouple/mV Isola ted Input Module 15

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Write Ladder Logic to Process Input Data

Write ladder logic to process the thermocouple input data for your application:

SLC 500 Controller

Data Files

Address

I:1.0 I:1.1 I:1.2 I:1.3

I:1.7

Input Image

(8 words)

ord 0 ord 1 ord 2 ord 3

ord 7

Channel 0 Data W

Channel 1 Data W Channel 2 Data W Channel 3 Data W Channel 0 Status W Channel 1 Status W Channel 2 Status W Channel 3 Status W

W W W

For more detailed information on these procedures, refer to Chapter 7 (Ladder Programming Examples) and Chapter 9 (Application Programming Examples) of the user manual.

ord

ord ord ord

ord ord ord ord

Output Image

Address

Bit

I:1.0

000000000000000

ariable

Thermocouple Input Data)

In this example, the module is located in slot 1.

Bit 0

Apply Power and Download Your Program

Apply power. Download your program to the SLC and put the controller into RUN mode. In this example, during a normal startup, the module status LED and channel

status 0 LED illuminate.

If channel LED is blinking:

Module detected: and status word:

open circuit under range over range config error

bit 12 = 1 bit 13 = 1 bit 14 = 1 bit 15 = 1

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CHANNEL STATUS

MODULE STATUS

THERMOCOUPLE/mV

INPUT

ISOLATED

012

Channel LEDs

Module Status LED

For more detailed information on these procedures, refer to Chapter 8 (Module Diagnostics and T roublesh o o t ing) of the user manual.

16 Thermocouple/mV Isolated Input Module

TIP

Troub l eshoot the Module

Monitor the status of input channel 0 to determine its configuration setting and operational status. This is useful for troubleshooting when the flashing channel LED indicates that an error has been flagged. If the module status LED is off, or if the

channel 0 LED is off or flashing, refer to step 8.

SLC 500 Controller

Data Files

Input Image

(8 words)

Output Image

W W W

ord 0 ord 1 ord 2 ord 3

ord 7

Channel 0 Data W Channel 1 Data W Channel 2 Data W

Channel 3 Data W

Channel 0 Status W

Channel 1 Status W Channel 2 Status W Channel 3 Status W

ordW ord ord

ord

Type

Zero (not used)

Open Circuit

Configuration Error

Open Circuit Error

Under Range Error

ord

ord ord ord

For this example, during normal operation only bit 11 is set.

Over Range Error

000010000000000

Bit

emperature Units

Channel Status

Address

I:1.4

Data Format

For more detailed information on these procedures, refer to Chapter 8 (Module Diagnostics and T roublesh o o t ing) of the user manual.

Type Input

Bit 0

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Thermocouple/mV Isola ted Input Module 17

WARNING

The following informat ion 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 yo ur system are subject to investigation by the local Author ity Having Jurisdiction at the time of installation.

EXPLOSION HAZARD

• Do not disconnect

equipment unless power has be en removed or t he area is known to be nonhazardous.

• Do not disconnect

connections to this equipment unless power has be en removed or t he area is known to be nonhazardous. Secure any external connection s that mate to this equipment by using screws, sliding latches, th readed 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 marq ués "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 pla que d’identificati on qu i 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.

AVERTISSE MEN

RISQUE D’EXPLOSION

• 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.

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18 Thermocouple/mV Isolated Input Module

Specifications

Module Location SLC chassis - any I/O module slot except 0 Input from System Backplane 5Vdc @ 0.110 A, 24Vdc @ 0.085A Thermocouple Types b, c, d, e, j, k, n, r, s, t Input Voltage -50 to +50mV and -100 to +100mV Number of Channels 4 (backplane and channel-to-channel isolated) A/D Conver sion Method Sigma-Delta modulation Input Filtering Analog filter with low-pass digital filter Normal mode rejection between

[+] input and [-] input Common mode rejection

between inputs and chassis ground

Channel bandwidth (-3db) 8Hz Calibration Once every six months Isolation Tested to 1000Vac for 60 sec. between channels and between user connections

Operating Temperature

Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),

Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating Damp Heat):

Required Terminal Block Cat. No. 1746-RT32 Wiring

Wire Category Torque

Enclosure Type Rating None (open style) Certifications

(when product is marked)

User Manual Publication 1746-6.16, Thermocouple/mV Isolated Input Module User Manual

Use this conductor category information for planning conductor routing as described in publication 1770-4.1, Industrial

Automation Wiring and Grounding Guidelines.

See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification

details.

Greater than 50dB @ 50Hz Greater than 60dB @ 60Hz

Greater than 120dB @ 50/60 Hz with 1K ohm imbalance

and backplane connections IEC 60068-2-1 (Test Ad, Operating Cold),

IEC 60068-2-2 (Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

C (32–140oF)

0-60

IEC 60068-2-2 (Test Bc, Un-packaged Non-operating Dry Heat), IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal Shock):

C (–40 to 185oF)

–40 to 85

5–95% non condensing

24-14 AWG 2 6-8 in-lbs.

UL UL Listed Industrial Control Equipment CSA CSA Certified Process Control Equipment CSA CSA Certified Process Control Equipment for Class I, Division 2

CE European Union 89/336/EEC EMC Directive, compliant with:

C-Tick Australian Radiocommunications Act, compliant with:

Group A,B,C,D Hazardous Locatio ns EN 50082-2; Industrial Immunity

EN 61326; Meas./Control/Lab., Industrial Requirements EN 61000-6-2; Industrial Immunity EN 61000-6-4; Industrial Emissions

AS/NZS 2064; Industrial Emissions

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Thermocouple/mV Isola ted Input Module 19

Channel Configuration Worksheet

Channel Configuration Word (O:e.0 through O:e.3) - Bit Descriptions

Bit(s) Define To Select

TC Type J 0 0 0 0 TC Type K 0 0 0 1 TC Type T 0 0 1 0 TC Type E 0 0 1 1 TC Type R 0 1 0 0 TC Type S 0 1 0 1 TC Type B 0 1 1 0 TC Type N 0 1 1 1

Input

0-3

Type

TC Type C 1 0 1 0 TC Type D 1 0 1 1

Invalid 1 1 0 0 Invalid 1 1 0 1 Invalid 1 1 1 0

CJC Temp. 1 1 1 1

Engr. Units x1 0 0

Engr. Units x10 0 1

Data

4, 5

Format

Scaled-for-PID 1 0

Counts 1 1

Upscale 0 1

Open

6, 7 Circuit

8oF

9, 10 Unused Unused 0 0 These bits must be zero for a valid configuration.

12-15 Unused Unused 0000 These bits must be zero for a valid configuration.

Enter Your Bit Selections >> 0000 For the Channel Configuration Word

Downscale 1 0

Mode

Invalid 1 1

Units

Degrees C 0

, oC

Degrees F 1

Channel Off 0

Chnl

Enable

Channel On 1

Set these bits in the Channel Configuration Word

15-12 11 10 9 8 7 6 5 4 3 2 1 0

50mV 1 0 0 0

100mV 1 0 0 1

Zero 0 0

Disable unused channels for faster response.

When set, module configures the channel and reads channel input before setting this bit in status word. If you change the configuration word, the status word must reflect the change before new data is valid. If you clear configuration word, module clears channel and status words. For new configuration word, channel data and status words remain cleared until the module sets this bit (11) in the status word.

Description

Project ________________________

Project ________________________ S

lot Number

Slot Number _____ Channel Number _____

Channel Number _____

Configure the channel for the input type connected to it.

Valid inputs are thermocouples and analog input signals o

f +50mV and +100mV. You can configure the channel to

of +50mV and +100mV. You can configure the channel to read the cold-junction (CJC) temperature. When reading the CJC temperature, the channel ignores the physical input signal.

put signal.

Select the channel data format from:

ngineering units (EU) x1 or x10

Engineering units (EU) x1 or x10

For EU x1, values are in 0.1 degrees or 0.01mV For EU x10, values are in whole C or F or 0.1mV

For EU x10, values are in whole oC or oF or 0.1mV

Scaled-for-PID (value is the same for any input type)

Proportional input signal range is scaled to 0-16,383 counts.

Proportional counts (value is same for any input type)

Proportional input signal range is scaled to +32,767 counts.

Select module response to a detected open circuit from: Zero to force the channel data word to zero.

Zero to force the channel data word to zero.

Upscale to force the channel data word to full scale. Downscale to force channel data word to low scale.

Downscale to force channel data word to low scale. Important: A bit selection or 1 1 is invalid.

or an open CJC thermistor, mV channels are not affected.

For an open CJC thermistor, mV channels are not affected.

F Important: The module requires 500 msec or one module update to flag the error while it ramps the channel input.

Select 5C/5F for thermal inputs. Ignored for mV inputs. Important: For EU x1 and 5F (0.15F), an over-range error

will occur above 3276.75F (cannot exceed 32767 counts).

_____

5 5

SLC is a registered trademark of Rockwell Automation, Inc. Allen-Bradley and SLC 500 are trademarks of Rockwell Automation, Inc.

Publication 1746-QS002 B-EN-P - July 2002

Publication 1746-QS002B-EN-P - July 2002 PN 957689-85

Rockwell Automation 1746-INT4 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Important User Information

Prevent Electrostatic Discharge

How to Get the Related User Manual

Unpack the Module

Review Power Requi rements

Install the Module and Connect the Thermocouples

Wire the RTB

Configure the Software

Set Up Channel 0

Write Ladder Logic to Process Input Data

Apply Power and Download Your Program

Troub l eshoot the Module

Specifications

Channel Configuration Worksheet