Allen-Bradley 2085-IRT4 Installation Manual

Installation Instructions

Original Instructions

Micro800 4-channel Thermocouple/RTD Input
Module

Catalog Numbers 2085-IRT4

Top ic Pa ge

Summary of Changes 1
Additional Resources 3
Overview 4
Mount the Module 4
Wire the Module 6
Specifications 7

Summary of Changes

This publication contains the following new or updated information. This list includes substantive updates only
and is not intended to reflect all changes. Translated versions are not always available for each revision.

Top ic Pa ge

Updated template Throughout
Updated Environment and Enclosure 2
Updated Attentions 3
Added Micro870 controller to Overview 4
Updated Environmental Specifications 8
Updated Certification 8

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Environment and Enclosure

ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in EN/IEC 60664-1), at
altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not provide
adequate protection to radio communication services in such environments.

This equipment is supplied as open-type equipment for indoor use. 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 enclosure must have suitable flame-retardant properties to
prevent or minimize the spread of flame, complying with a flame spread rating of 5VA or be
approved for the application if nonmetallic. The interior of the enclosure must be accessible
only by the use of a tool. Subsequent sections of this publication may contain more
information regarding specific enclosure type ratings that are required to comply with
certain product safety certifications.

In addition to this publication, see the following:

• Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
installation requirements.

• NEMA Standard 250 and EN/IEC 60529, as applicable, for explanations of the degrees of
protection provided by enclosures.

Prevent Electrostatic Discharge

ATTENTION: 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.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in use.

, for more

North American Hazardous Location Approval

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 cod e. 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.

WARNING: EXPLOSION HAZARD

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

• Do not disconnect connections to this eq uipment
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.

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.

WARNING: 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.

2 Rockwell Automation Publication 2085-IN007C-EN-P - August 2022

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

ATTENTION:

• This product is grounded through the DIN rail to chassis ground. Use zinc-plated chromate­passivated steel DIN rail to assure proper grounding. The use of other DIN rail materials (for
example, aluminum or plastic) that can corrode, oxidize, or are poor conductors, can result in
improper or intermittent grounding. Secure DIN rail to mounting surface approximately every
200 mm (7.8 in.) and use end-anchors appropriately. Be sure to ground the DIN rail properly.
Refer to Industrial Automation Wiring and Grounding Guidelines, Rockwell Automation
publication 1770-4.1, for more information.

• To comply with UL restrictions, this equipment must be powered from a source compliant
with the following: Class 2 or Limited Voltage/Current.

• To comply with the CE Low Voltage Directive (LVD), all connected I/O must be powered from a
source compliant with the following: Safety Extra Low Voltage (SELV) or Protected Extra Low
Voltage (PELV).

• Failure to connect a bus terminator module to the last expansion I/O module will result in a
controller hard fault.

• Do not wire more than 2 conductors on any terminal.

WAR N IN G :

• 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.

• If you connect or disconnect wiring while the field-side power is on, an electric 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.

• If you insert or remove the module while backplane power is on, an electric arc can occur.
This could cause an explosion in hazardous location installations. The module does not
support “Removal and Insertion Under Power” (RIUP) capability. Do not connect or disconnect
the module while power is applied. Be sure power is removed before proceeding.

• Do not unscrew the RTB hold down screws and remove the RTB while power is on. This could
cause an explosion in hazardous location installations. Be sure that power is removed before
proceeding.

• Do not connect directly to line voltage. Line voltage must be supplied by a suitable, approved
isolating transformer or power supply having short circuit capacity not exceeding 100 VA
maximum or equivalent.

• When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a
suitable enclosure with proper wiring method that complies with the governing electrical
codes.

Additional Resources

Resource Description

Micro830, Micro850, and Micro870 Programmable Controllers
User Manual, publication 2080-UM002

Micro800 Bus Terminator Installation Instructions,
publication 2085-IN002

Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1

You can view or download publications at rok.auto/literature.

Rockwell Automation Publication 2085-IN007C-EN-P - August 2022 3

A more detailed description of how to install and use your
Micro830, Micro850, and Micro870 programmable controllers.

Information on installing the bus terminator module.

More information on proper wiring and grounding techniques.

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

1

1

7

Front view

Right top view

1

2

6

5

4

4

4

3

3

2085-IRT4

Overview

The Micro800™ expansion I/O is a modular I/O that complements and extends the capabilities of Micro850® and
Micro870® controllers. These expansion I/O modules interface with the controllers using an I/O expansion port.

I/O Module Overview

Module Description

Description Description

1 Mounting screw hole / mounting foot 5 Module interconnect latch
2 Removable Terminal Block (RTB) 6 DIN rail mounting latch
3 Thermistor 7 I/O status indicator
4 RTB hold down screws

This equipment is sensitive to electrostatic discharge (ESD).
Follow ESD prevention guidelines when handling this equipment.

Mount the Module

For more information on proper grounding guidelines, see the Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1.

Module Spacing

Maintain spacing from objects such as enclosure walls, wireways, and adjacent equipment. Allow 50.8 mm (2 in.)
of space on all sides for adequate ventilation, as shown.

4 Rockwell Automation Publication 2085-IN007C-EN-P - August 2022

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Mounting dimensions do not include mounting feet or DIN rail latches.

90 mm
(3.54 in.)

150 mm (5.91 in.)

Micro850 Controller

Bus terminator

2085-IRT4

44.5 mm (1.75 in.)

87 mm (3.42 in.)

Mounting Dimensions and DIN Rail Mounting

DIN Rail Mounting

The module can be mounted using the following DIN rails: 35 x 7.5 x 1 mm (EN 50022 - 35 x 7.5).

For environments with greater vibration and shock concerns, use the panel mounting method,
instead of DIN rail mounting.

Before mounting the module on a DIN rail, use a flat-blade screwdriver in the DIN rail latch and pry it downwards
until it is in the unlatched position.

1. Hook the top of the DIN rail mounting area of the controller onto the DIN rail, and then press the bottom
until the controller snaps onto the DIN rail.

2. Push the DIN rail latch back into the latched position.
Use DIN rail end anchors (Allen-Bradley® part number 1492-EA35 or 1492-EAHJ35) for vibration or shock
environments.

To remove your controller from the DIN rail, pry the DIN rail latch downwards until it is in the unlatched position.

Panel Mounting

The preferred mounting method is to use two M4 (#8) per module. Hole spacing tolerance: ±0.4 mm (0.016 in.).
For mounting dimensions, see the Micro830®, Micro850, and Micro870 Programmable Controllers User Manual,
publication 2080-UM002

Follow these steps to install your module using mounting screws.

1. Place the module next to the controller against the panel where you are mounting it. Make sure that the
controller and module are spaced properly.

2. Mark drilling holes through the mounting screw holes and mounting feet then remove the module.

3. Drill the holes at the markings, then replace the module and mount it.
Leave the protective debris strip in place until you are finished wiring the module and any other devices.

.

Rockwell Automation Publication 2085-IN007C-EN-P - August 2022 5

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

If a thermocouple is used, the use of the
supplied CJC assembly is compulsory.

Terminal Block 1 Terminal Block 2

System Assembly

The Micro800 expansion I/O module is attached to the controller or another I/O module by means of
interconnecting latches and hooks, as well as the bus connector. The controller and expansion I/O modules must
terminate with a 2085-ECR Bus Terminator module.

Be sure to lock the module interconnect latches and tighten the RTB hold down screws before applying power to
the module.

For installation of the 2085-ECR module, see the Micro800 Bus Terminator Module Installation Instructions,
publication 2085-IN002

.

Field Wiring Connections

In solid-state control systems, grounding and wire routing helps limit the effects of noise due to electromagnetic
interference (EMI).

Wire the Module

Included with your module are two 12-pin Removable Terminal Blocks (RTB). Basic wiring of the module is shown
below.

Basic Wiring to the Module

CJC+

TH

CJC-

3-wire RTD

1

1a

2

Shielded cable

Thermocouple

1

2

Shielded cable

mV

OR

2-wire RTD

1

2

1
1a

2a

2

4-wire RTD

Shielded cable

Shielded cable

CH0+

CH0H

CH0L

CH0-

CH1+

CH1H

CH1L

CH1-

NC

NC

NC

NC

CH2+

CH2H

CH2L

CH2-

CH3+

CH3H

CH3L

CH3-

CJC+

TH

CJC-

NC

The module currently ships with the CJC assembly fixed to the module.

6 Rockwell Automation Publication 2085-IN007C-EN-P - August 2022

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Min Max

Solid

0.34 mm

2

(22 AWG) 2.5 mm2 (14 AWG) Copper wire rated @ 90 °C

(194 °F), or greater, 1.2 mm
(3/64 in.) insulation max

Stranded

0.20 mm

2

(22 AWG) 2.5 mm2 (14 AWG)

Specifications

General Specifications

Attribute Value

Number of I/O 4

Dimensions, HxWxD

Shipping weight, approx. 220 g (7.76 oz)

Bus current draw, max

Wire size

44.5 x 90 x 87 mm
(1.75 x 3.54 x 3.42 in.)

5V DC, 160 mA
24V DC, 50 mA

Wiring category

Terminal screw torque

Input type

Resolution 16 bits
Channel update time, typical 12…500 ms per enabled channel
Input impedance > 10 MΩ
Power dissipation, total 2 W
Enclosure type rating None (open-style)
Status indicators 1 health status indicators

Isolation voltage

North American temp code T4

(1) Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and Grounding Guidelines,

(2) RTB hold down screws should be tightened by hand. They should not be tightened using a power tool.

(1)

publication 1770-4.1

2 – on signal ports

0.5…0.6 N•m
(4.4…5.3 lb•in)

Thermocouple type: B, C, E, J, K, TXK/XK (L), N, R, S, T
RTD type:
100 Ω Pt  = 0.00385 Euro
200 Ω Pt  = 0.00385 Euro
100 Ω Pt  = 0.003916 U.S
200 Ω Pt  = 0.003916 U.S.
100 Ω Nickel 618
200 Ω Nickel 618
120 Ω Nickel 672
10 Ω Copper 427
mV range: 0…100 mV
Ohm input: 0…500 Ω

50V (continuous), Reinforced Insulation Type, channel to system.
Type tested at 720V DC for 60 s

.

(2)

Rockwell Automation Publication 2085-IN007C-EN-P - August 2022 7

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Environmental Specifications

Attribute Value

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

Temperature, operating

Temperature, surrounding air, max 65 °C (149 °F)

Temperature, nonoperating

Relative humidity

Vibration

Shock, operating

Shock, nonoperating

Emissions IEC 61000-6-4

ESD immunity

Radiated RF immunity

EFT/B immunity

Surge transient immunity

Conducted RF immunity

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

-20…+65 °C (-4…+149 °F)

IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):

-40…+85 °C (-40…+185 °F)
IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing
IEC 60068-2-6 (Test Fc, Operating):

2 g @ 10…500 Hz
IEC 60068-2-27 (Test Ea, Unpackaged Shock):

25 g
IEC 60068-2-27 (Test Ea, Unpackaged Shock):

25 g – DIN rail mount
35 g – Panel mount

IEC 61000-4-2:
6 kV contact discharges
8 kV air discharges

IEC 61000-4-3:
10V/m with 1 kHz sine-wave 80% AM from 80…6000 MHz

IEC 61000-4-4:
±2 kV at 5 kHz on signal ports
±2 kV @ 100 kHz on signal ports

IEC 61000-4-5:
±1 kV line-line(DM) and ±2 kV line-earth(CM) on signal ports

IEC 61000-4-6:
10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz

Certifications

Certification (when product is

(1)

marked)

c-UL-us

CE

RCM

KC

Value

UL Listed Industrial Control Equipment, certified for US and Canada. See UL File E322657.
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for U.S. and Canada.

See UL File E334470

European Union 2014/30/EU EMC Directive, compliant with:

EN 61326-1; Meas./Control/Lab., Industrial Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

European Union 2011/65/EU RoHS, compliant with:

EN IEC 63000; Technical documentation

Australian Radiocommunications Act, compliant with:

EN 61000-6-4; Industrial Emissions

Korean Registration of Broadcasting and Communications Equipment, compliant with:

Article 58-2 of Radio Waves Act, Clause 3

8 Rockwell Automation Publication 2085-IN007C-EN-P - August 2022

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Certifications (Continued)

Certification (when product is

(1)

marked)

EAC

Morocco Arrêté ministériel n° 6404-15 du 29 ramadan 1436

UKCA

(1) See the Product Certification link at rok.auto/certifications

Value

Russian Customs Union TR CU 020/2011 EMC Technical Regulation
Russian Customs Union TR CU 004/2011 LV Technical Regulation

2016 No. 1091 – Electromagnetic Compatibility Regulations
2016 No. 1101 – Electrical Equipment (Safety) Regulations
2012 No. 3032 – Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic
Equipment Regulations

for Declaration of Conformity, Certificates, and other certification details.

Rockwell Automation Publication 2085-IN007C-EN-P - August 2022 9

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Notes:

10 Rockwell Automation Publication 2085-IN007C-EN-P - August 2022

Notes:

Micro800 4-channel Thermocouple/RTD Input Module Installation Instructions

Rockwell Automation Publication 2085-IN007C-EN-P - August 2022 11

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Use these resources to access support information.

Technical Support Center

Knowledgebase Access Knowledgebase articles. rok.auto/knowledgebase
Local Technical Support Phone Numbers Locate the telephone number for your country. rok.auto/phonesupport

Literature Library

Product Compatibility and Download
Center (PCDC)

Find help with how-to videos, FAQs, chat, user
forums, and product notification updates.

Find installation instructions, manuals, brochures,
and technical data publications.

Download firmware, associated files (such as AOP,
EDS, and DTM), and access product release notes.

rok.auto/support

rok.auto/literature

rok.auto/pcdc

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Waste Electrical and Electronic Equipment (WEEE)

At the end of life, this equipment should be collected separately from any unsorted
municipal waste.

Rockwell Automation maintains current product environmental compliance information on its website at rok.auto/pec.

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