Allen-Bradley MicroLogix 1200 RTD/Resistance Bedienungsanleitung

Publication 1762-IN014B-EN-P - July 2013

Installation Instructions

MicroLogix 1200 RTD/Resistance Input Module

Catalog Number 1762-IR4

Topic Page

Module Overview 2

Description 2

Module Installation 3

System Assembly 4

Mounting 4

Field Wiring Connections 7

I/O Memory Mapping 15

Specifications 19

North American Hazardous Location Approval 22

Additional Resources 23

2MicroLogix 1200 RTD/Resistance Input Module

Publication 1762-IN014B-EN-P - July 2013

Module Overview

The 1762-IR4 module receives and stores digitally converted analog data from RTDs or other

resistance inputs, such as potentiometers. The module supports connections from any

combination of up to 4 RTDs or other resistance inputs. See the input specifications on page 20

for supported RTD and resistance types, their associated temperature ranges, and the analog

input signal ranges that each channel supports. Each of the 4 input channels is individually

configurable for a specific input device and provides open- or short-circuit and over- or

under-range indication.

Description

Item Description Item Description

1a upper panel mounting tab 5bus connector cover

1b lower panel mounting tab 6flat ribbon cable with bus connector (female)

2power diagnostic LED 7terminal block

3module door with terminal identification

label 8DIN rail latch

4bus connector with male pins 9pull loop

MicroLogix 1200 RTD/Resistance Input Module 3

Publication 1762-IN014B-EN-P - July 2013

Module Installation

1762 I/O is suitable for use in an industrial environment when installed in accordance with these

instructions. Specifically, this equipment is intended for use in clean, dry environments

(Pollution degree 2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC

60664-1).(3)

Prevent Electrostatic Discharge

Remove Power

(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a

temporary conductivity caused by condensation shall be expected.

(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are

controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

ATTENTION

Electrostatic discharge can damage integrated circuits or semiconductors

if you touch bus connector pins. Follow these guidelines when you handle

the module:

•Touch a grounded object to discharge static potential.

•Wear an approved wrist-strap grounding device.

•Do not touch the bus connector or connector pins.

•Do not touch circuit components inside the module.

•If available, use a static-safe work station.

•When not in use, keep the module in its static-shield box.

ATTENTION

Remove power before removing or installing this module. When you

remove or install a module with power applied, an electrical arc may occur.

An electrical arc can cause personal injury or property damage by:

•sending an erroneous signal to your system’s field devices, causing

unintended machine motion

•causing an explosion in a hazardous environment

•causing permanent damage to the module’s circuitry

Electrical arcing causes excessive wear to contacts on both the module and

its mating connector. Worn contacts may create electrical resistance.

4MicroLogix 1200 RTD/Resistance Input Module

Publication 1762-IN014B-EN-P - July 2013

System Assembly

The expansion I/O module is attached to the controller or another I/O module by means of a

ribbon cable after mounting as shown below.

Mounting

TIP

Use the pull loop on the connector to disconnect modules. Do not pull

on the ribbon cable.

WARNING

EXPLOSION HAZARD

•In Class I, Division 2 applications, the bus connector must be fully

seated and the bus connector cover must be snapped in place.

•In Class I, Division 2 applications, all modules must be mounted in

direct contact with each other as shown on page 5. If DIN rail

mounting is used, an end stop must be installed ahead of the

controller and after the last 1762 I/O module.

ATTENTION

Do not remove protective debris strip until after the module and all other

equipment near the module is mounted and wiring is complete. Once

wiring is complete and the module is free of debris, carefully the remove

protective debris strip. Failure to remove the strip before operating can

cause overheating.

MicroLogix 1200 RTD/Resistance Input Module 5

Publication 1762-IN014B-EN-P - July 2013

Minimum Spacing

Maintain spacing from enclosure

walls, wireways, adjacent

equipment, etc. Allow 50.8 mm

(2 in.) of space on all sides for

adequate ventilation, as shown:

DIN Rail Mounting

The module can be mounted using the following DIN rails: 35 x 7.5 mm

(EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x 15).

Before mounting the module on a DIN rail, close the DIN rail latch. Press the DIN rail

mounting area of the module against the DIN rail. The latch will momentarily open and lock

into place.

TIP

The 1762 expansion I/O may be mounted horizontally only.

ATTENTION

During panel or DIN rail mounting of all devices, be sure that all debris

(metal chips, wire strands, etc.) is kept from falling into the module.

Debris that falls into the module could cause damage when power is

applied to the module.

Side Side

Top

Bottom

MicroLogix 1200

1762 I/O

6MicroLogix 1200 RTD/Resistance Input Module

Publication 1762-IN014B-EN-P - July 2013

Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or 1492-EAH35) for

environments with vibration or shock concerns.

Panel Mounting

Use the dimensional template shown below to mount the module. The preferred mounting

method is to use two M4 or #8 panhead screws per module. M3.5 or #6 panhead screws may also

be used, but a washer may be needed to ensure a good ground contact. Mounting screws are

required on every module.

TIP

For environments with extreme vibration and shock concerns, use the

panel mounting method described below, instead of DIN rail

mounting.

End Anchor

(3.54)

100

(3.94)

40.4

(1.59)

40.4

(1.59)

14.5

(0.57)

For more than two modules: (number of modules - 1) x 40.4 mm (1.59 in.)

NOTE:

Hole spacing tolerance: ±0.4 mm (0.016 in.).

1762 I/O

MicroLogix 1200

MicroLogix 1200 RTD/Resistance Input Module 7

Publication 1762-IN014B-EN-P - July 2013

Field Wiring Connections

Grounding the Module

This product is intended to be mounted to a well-grounded mounting surface such as a metal

panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used)

are not required unless the mounting surface cannot be grounded. Refer to Industrial

Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for

additional information.

System Wiring Guidelines

Consider the following when wiring your system:

•Do not use the module’s NC terminals as connection points.

•Use Belden shielded, twisted-pair wire to ensure proper operation and high immunity to

electrical noise. See “RTD Wiring Considerations”.

•To limit noise, locate RTD and resistance device signal wires as far away as possible from

power lines, load lines, and other sources of electrical noise, such as hard-contact

switches, relays, and AC motor drives.

•Locate RTD modules away from other modules which generate a significant amount of

heat.

•Under normal conditions, the drain wire and shield junction should be connected to

earth ground, via a panel or DIN rail mounting screw at the 1762-IR4 module end.

•Keep shield connection to ground as short as possible.

•To ensure optimum accuracy, limit overall cable impedance by keeping your cable as

short as possible. Locate the I/O system as close to your sensors or actuators as your

application will permit. See the table on the following page.

Terminal Block Layout

EXC 2

SENSE 2

RTN 2

EXC 3

SENSE 3

RTN 3

EXC 0

SENSE 0

RTN 0

EXC 1

SENSE 1

RTN 1

NC terminals are not intended for

use as connection points.

Do not connect any wires to the NC

terminals.

8MicroLogix 1200 RTD/Resistance Input Module

Publication 1762-IN014B-EN-P - July 2013

RTD Wiring Considerations

Since the operating principle of the RTD module is based on the measurement of resistance, take

special care when selecting your input cable. For 2-wire or 3-wire configurations, select a cable

that has a consistent impedance throughout its entire length.

When using a 3-wire configuration, the module compensates for resistance error due to lead wire

length. For example, in a 3-wire configuration, the module reads the resistance due to the length

of one of the wires and assumes that the resistance of the other wire is equal. If the resistances of

the individual lead wires are much different, an error may exist. The closer the resistance values

are to each other, the greater the amount of error is eliminated.

To insure that the lead values match as closely as possible:

•Keep lead resistance as small as possible and less than 25Ω .

•Use quality cable that has a small tolerance impedance rating.

•Use a heavy-gauge lead wire which has less resistance per foot.

Configuration Recommended Cable

2-wire Belden™ 9501 or equivalent

3-wire — less than 30.48 m (100ft.) Belden™ 9533 or equivalent

3-wire — greater than 30.48 m (100 ft.) or high humidity conditions Belden™ 83503 or equivalent

IMPORTANT

The RTD module requires three wires to compensate for lead resistance

error. We recommend that you do not use 2-wire RTDs if long cable runs

are required, as it reduces the accuracy of the system. However, if a

two-wire configuration is required, reduce the effect of the lead wire

resistance by using a lower gauge wire for the cable (for example, use

AWG #16 instead of AWG #24). The module’s terminal block accepts

two AWG #14 gauge wires.

IMPORTANT

To ensure temperature or resistance value accuracy, the resistance

difference of the cable lead wires must be equal to or less than 0.01Ω .

MicroLogix 1200 RTD/Resistance Input Module 9

Publication 1762-IN014B-EN-P - July 2013

RTD Wiring Configurations

For a 3-wire configuration, the module can compensate for a maximum cable length associated

with an overall cable impedance of 25 ohms.

Three configurations of RTDs can be connected to the 1762-IR4 module:

•2-wire RTD, which is composed of an RTD EXC (excitation) lead wire and a RTN

(return) lead wire

•3-wire RTD, which is composed of a Sense and 2 RTD lead wires

(RTD EXC and RTN)

•4-wire RTD, which is composed of a Sense and 2 RTD lead wires

(RTD EXC and RTN). The second sense wire of a 4-wire RTD is left open.

2-Wire RTD Configuration

IMPORTANT

Using 2-wire configurations does not permit the module to compensate for

resistance error to do lead wire length. The resulting analog data includes

the effect of this uncompensated lead wire resistance. The module

continues to place the uncompensated analog data in the input data file, but

the open-circuit status bit (OCx) is set in word 4 of the input data file for

any enabled channel using a 2-wire configuration. These status bits may be

used in the control program to indicate that the analog data includes error

due to uncompensated lead wires. See page 16 for a detailed discussion of

the open-circuit status bits.

EXC 2

SENSE 2

RTN 2

Belden 9501 Shielded Cable

Cable Shield (to Ground)

RTD EXC

Return

RTD EXC

Return

10 MicroLogix 1200 RTD/Resistance Input Module

Publication 1762-IN014B-EN-P - July 2013

3-Wire RTD Configuration

4-Wire RTD Configuration

Wiring Resistance Devices (Potentiometers)

Potentiometer wiring requires the same type of cable as that for the RTD described on page 8.

Potentiometers can be connected to the module as a 2-wire or 3-wire connection as shown on

page 11.

EXC 2

SENSE 2

RTN 2

Belden 83503 or 9533 Shielded Cable

Cable Shield (to Ground)

RTD EXC

Sense

RTD EXC

Return

Sense

Return

EXC 2

SENSE 2

RTN 2

Belden 83503 or 9533 Shielded Cable

Leave one sensor wire open.

Cable Shield (to Ground)

RTD EXC

Return

RTD EXC

Return

Sense Sense

Inhaltsverzeichnis

Andere Allen-Bradley E/A-System Handbücher

Allen-Bradley

Allen-Bradley 1771-IB Installations- und Benutzerhandbuch

Allen-Bradley

Allen-Bradley ArmorBlock MaXum 4 Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1794-IT8 Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1746-INT4 Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1794-OF8IH Bedienungsanleitung

Allen-Bradley

Allen-Bradley SLC 500 1746-NR4 Bedienungsanleitung

Allen-Bradley

Allen-Bradley POINT I/O 1734-4IOL Bedienungsanleitung

Allen-Bradley

Allen-Bradley FLEX I/O 1794-IC16 Bedienungsanleitung

Allen-Bradley

Allen-Bradley SLC 500 Bedienungsanleitung

Allen-Bradley

Allen-Bradley SLC 500 1747-L511 Bedienungsanleitung

Allen-Bradley

Allen-Bradley D Series Bedienungsanleitung

Allen-Bradley

Allen-Bradley C Series Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1794-IT8 Bedienungsanleitung

Allen-Bradley

Allen-Bradley POINT I/O 1734-IE2C Bedienungsanleitung

Allen-Bradley

Allen-Bradley SLC 500 1746-NI4 Bedienungsanleitung

Allen-Bradley

Allen-Bradley PowerFlex 750 Series Bedienungsanleitung

Allen-Bradley

Allen-Bradley C Series Bedienungsanleitung

Allen-Bradley

Allen-Bradley C Series Bedienungsanleitung

Allen-Bradley

Allen-Bradley ControlLogix 1756-IF6CIS Bedienungsanleitung

Allen-Bradley

Allen-Bradley ControlLogix 1756-IV16 Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1794-IRT8 Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1734-OE4C Bedienungsanleitung

Allen-Bradley

Allen-Bradley ControlLogix 1756-IF4FXOF2F Bedienungsanleitung

Allen-Bradley

Allen-Bradley 1771-IFE Bedienungsanleitung

Beliebte E/A-System Handbücher anderer Marken

WAGO

WAGO 750-344 Bedienungsanleitung

Teknim

Teknim TWM-1887 Bedienungsanleitung

Intelligent Appliance

Intelligent Appliance IA-2662-E Bedienungsanleitung

BERGHOF

BERGHOF ECC DIO 16/16 Bedienungsanleitung

Advantech

Advantech PCM-27J3AU Installations- und Betriebshandbuch

Festo

Festo CP-E08-M12-CL Bedienungsanleitung

Measurement Computing

Measurement Computing PCI-DAS64/M1/16 Bedienungsanleitung

Hitachi

Hitachi HX-RIO3 Series Bedienungsanleitung

NUUO

NUUO SCB-A08 Bedienungsanleitung

M-system

M-system R3Y-RS8 Bedienungsanleitung

jablotron

jablotron JB-110N Bedienungsanleitung

Omron

Omron SYSMAC C200H Bedienungsanleitung

DOLD

DOLD SAFEMASTER M Bedienungsanleitung

ABB

ABB OPT-MF-001 Bedienungsanleitung

Omron

Omron SYSMAC C2000H Bedienungsanleitung

Helmholz

Helmholz TB20 Bedienungsanleitung

ICP DAS USA

ICP DAS USA tM-AD2 Bedienungsanleitung

Automationdirect.com

Automationdirect.com DL305 Bedienungsanleitung