Allen-Bradley MicroLogix 1762-IQ8 Manuale utente

1762-IN004A-US-P

Installation Instructions

MicroLogix™ 1762-IQ8 DC Input Module

Inside

Description.......................................................3

Installation........................................................4

Mounting..........................................................5

System Assembly.............................................7

Field Wiring Connections...................................7

I/O Memory Mapping......................................10

Specifications.................................................11

Hazardous Location Considerations ................13

Environnements dangereux.............................14

2MicroLogix™ 1762-IQ8 DC Input Module

1762-IN004A-US-P

For More Information

If you would like a manual, you can:

•download a free electronic version from the internet:

www.ab.com/micrologix or www.theautomationbookstore.com

•purchase a printed manual by:

–contacting your local distributor or Rockwell Automation representative

–visiting www.theautomationbookstore.com and placing your order

–calling 1.800.963.9548 (USA/Canada)

or 001.330.725.1574 (Outside USA/Canada)

For Refer to this Document Pub. No.

Information on installing, wiring, and

operating a MicroLogix 1200

Programmable Controller

MicroLogix1200Programmable

Controllers User Manual 1762-UM001A-US-P

Installation guide for the MicroLogix

1200 Programmable Controller. MicroLogix1200Programmable

Controllers Installation

Instructions

1762-IN006A-ML-P

Installation guide for the MicroLogix

1200 Memory Module and Real Time

Clock.

MicroLogix 1200 Memory

Module and/or RealTimeClock

Installation Instructions

1762-IN001A-US-P

Installation guide for the 1762-IA8

Discrete Input Module 1762-IA8 120V ac Input Module

Installation Instructions 1762-IN002A-US-P

Installation guide for the 1762-OW8

Discrete Output Module 1762-OW8RelayOutputModule

Installation Instructions 1762-IN003A-US-P

Installation guide for the 1762-IF2OF2

Analog I/O Module 1762-IF2OF2 Analog Input/

Output Module Installation

Instructions

1762-IN005A-US-P

More information on proper wiring and

grounding techniques. Industrial Automation Wiring

and Grounding Guidelines 1770-4.1

MicroLogix™ 1762-IQ8 DC Input Module 3

1762-IN004A-US-P

Description

Item Description

1a upper panel mounting tab

1b lower panel mounting tab

2I/OdiagnosticLEDs

3 module door with

terminal identification

label

4 bus connector

with male pins

5 bus connector cover

6 flat ribbon cable with bus

connector (female pins)

7 terminal block

8 DIN rail latch

9 pull loop

4MicroLogix™ 1762-IQ8 DC Input Module

1762-IN004A-US-P

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 donot exceed the impulsevoltage capability of the product’s insulation.

(3) Pollution Degree 2 and OverVoltage 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.

MicroLogix™ 1762-IQ8 DC Input Module 5

1762-IN004A-US-P

Mounting

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:

!ATTENTION: Do not remove protective debris strip until after

the module and all other equipment near the module ismounted and

wiring is complete. Once wiring is complete and the module is free

of debris, carefully remove protective debris strip. Failure to

remove strip before operating can cause overheating.

Note: 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.

MicroLogix

1200

1762 I/O

Side Side

Top

Bottom

6MicroLogix™ 1762-IQ8 DC Input Module

1762-IN004A-US-P

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.

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

1492-EAH35) for vibration or shock environments.

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.

Note:

For environments with greater vibration and shock concerns, use the

panel mounting method described below, instead of DIN rail

mounting.

End Anchor

MicroLogix 1200MicroLogix 1200

ControllerController

MicroLogix 1200MicroLogix 1200

Expansion I/OExpansion I/O

MicroLogix 1200MicroLogix 1200

Expansion I/OExpansion I/O

MicroLogix 1200MicroLogix 1200

Expansion I/OExpansion I/O

(3.54)

100

(3.94)

40.4

(1.59)

40.4

(1.59)

14.5

(0.57)

For more than 2 modules: (number of modules - 1) x 40 mm (1.58 in.)

NOTE: All dimensions

are in mm (inches).

Hole spacing

tolerance: ±0.4 mm

(0.016 in.).

MicroLogix™ 1762-IQ8 DC Input Module 7

1762-IN004A-US-P

System Assembly

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

means of a flat ribbon cable after mounting as shown below.

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.

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

on the ribbon cable.

!ATTENTION: 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 6. If DIN rail

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

controller and after the last 1762 I/O module.

8MicroLogix™ 1762-IQ8 DC Input Module

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Input Wiring

Basic wiring(1) of input devices to the 1762-IQ8 is shown below.

A write-on label is provided with the module. Mark the identification of each

terminal with permanent ink, and slide the label back into the door.

(1) Sinking/Sourcing Inputs - Sourcing/sinking describes the current flow between the I/O module and the

field device. Sourcing I/O circuits supply (source) current to sinking field devices. Sinking I/O circuits are

driven by a current sourcing field device. Fielddevicesconnectedto the negative side (DC Common) of

the field power supply are sinking field devices. Field devices connected to the positive side (+V) of the

field supply are sourcing field devices.

!ATTENTION: Be careful when stripping wires. Wire fragments

that fall into a module could cause damage when power is applied.

Once wiring is complete, ensure the module is free of all metal

fragments.

!ATTENTION: Miswiring of the module to an AC power source

will damage the module.

IN 7

IN 5

IN 3

IN 1

COM

IN 6

IN 4

IN 2

IN 0

24V dc

COM

Commons are

connected internally.

+DC (sinking)

-DC (sourcing)

-DC (sinking)

+DC (sourcing)

MicroLogix™ 1762-IQ8 DC Input Module 9

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Wiring the Finger-Safe Terminal Block

When wiring the terminal block, keep the finger-safe cover in place.

1. Route the wire under the terminal pressure plate. You can use the stripped end

of the wire or a spade lug. The terminals will accept a 6.35 mm (0.25 in.)

spade lug.

2. Tighten the terminal screw making sure the pressure plate secures the wire.

Recommended torque when tightening terminal screws is 0.904 Nm

(8 in-lbs).

Wire Size and Terminal Screw Torque

Each terminal accepts up to two wires with the following restrictions:

Note:

If you need to remove the finger-safe cover, insert a screw driver into

one of the square wiring holes and gently pry the cover off. If you wire

the terminal block with the finger-safe cover removed, you will not be

able to put it back on the terminal block because the wires will be in the

way.

Wire Type Wire Size Terminal Screw Torque

Solid Cu-90°C (194°F) #14 to #22 AWG 0.904 Nm (8 in-lbs)

Stranded Cu-90°C (194°F) #16 to #22 AWG 0.904 Nm (8 in-lbs)

Note: Finger-safe cover not shown.

10 MicroLogix™ 1762-IQ8 DC Input Module

1762-IN004A-US-P

I/O Memory Mapping

Input Data File

For each input module, the input data file contains the current state of the field

input points. Bit positions 0 through 7 correspond to input terminals 0 through 7.

r = read only, 0= always at a0 or OFF state

Addressing

The addressing scheme for 1762 Expansion I/O is shown below.

(1) I/O located on the controller (embedded I/O) is slot 0. I/O added to the controller (expansion I/O) begins

with slot 1.

Word

Bit Position

1514131211109876543210

000000000rrrrrrrr

I1:x.0/0

Input

Data File Slot Number (1) Word (always zero for this module)

Bit (0 - 7)

Bit Delimiter

Word Delimiter

Slot Delimiter

Indice

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