Allen-bradley 1771-ife User manual

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Publication 17715.45 - July 1997

Analog Input Module

(Catalog Number 1771-IFE/C)

Use this document as a guide when installing the 1771-IFE/C analog

input module.

To See page

Prevent Electrostatic Discharge Below

Understand Compliance to European Union Directives 2

Understand Product Compatibility 2

Calculate Power Requirements 3

Determine Module Placement 3

Set the A/B Simulation Jumper 3

Set the Configuration Jumpers 4

Key the Backplane Connector 4

Install the Module and Field Wiring Arm 5

Connect Wiring to the Field Wiring Arm 6

Ground the Chassis and Module 9

Configure the Module 10

For this reference information See page

Status Indicators 12

Troubleshooting 13

Specifications 13

CSA Hazardous Approval 15

Differences Between Series A, B and C Modules 16

The analog input module is sensitive to electrostatic discharge.

!ATTENTION: Electrostatic discharge can damage

integrated circuits or semiconductors if you touch

backplane 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 backplane 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

This

icon is used when

additional information

is available in the

Analog

Input Module User Manual

,

publication 17716.5.1

15.

If you need a copy of this

manual, fax the enclosed

User Manual Request Card

to 18005766340. If you

are outside the U.S., fax the

card to13307234036.

Installation Instructions

Contents

Prevent Electrostatic

Discharge

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Analog Input Module2

Publication

17715.45 - July 1997

If this product has the CE mark it is approved for installation within

the European Union and EEA regions. It has been designed and

tested to meet the following directives.

EMC Directive

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 50081-2EMC – Generic Emission Standard,

Part 2 – Industrial Environment

•EN 50082-2EMC – Generic Immunity Standard,

Part 2 – Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC

Low Voltage, by applying the safety requirements of EN 61131–2

Programmable Controllers, Part 2 – Equipment Requirements and

Tests.

For specific information required by EN 61131-2, see the appropriate

sections in this publication, as well as these Allen-Bradley

publications:

Publication Publication number

Industrial Automation Wiring and Grounding Guidelines

For Noise Immunity

17704.1

Guidelines for Handling Lithium Batteries AG5.4

Automation Systems Catalog B111

The 1771-IFE module can be used with any 1771 I/O chassis.

Compatibility and data table use is listed below.

C

Use of Data Table Compatibility

Catalog

Number Input

Ima

g

e

Output

Ima

g

e

Read

Block

Write

Block

Addressing Chassis

Si

Number

Image

Bits

Image

Bits

Block

Words

Block

Words 1/2Slot 1Slot 2Slot

Chassis

Series

1771IFE 8 8 22 39 Y Y Y A, B

A

= Compatible with 1771A1, A2, A4

B = Compatible with 1771A1B, A2B, A3B, A3B1, A4B

Y = Compatible without restriction.

Do not use this module with cat. no. 1771-AL PLC-2/20 or 2/30

Local Adapter.

Understand Compliance to

European Union Directives

Understand Product

Compatibility

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Analog Input Module 3

Publication

17715.45 - July 1997

The module receives its power through the 1771 I/O power supply

and requires 500mA from the backplane.

Add this current to the requirements of all other modules in the I/O

chassis to prevent overloading the chassis backplane and/or

backplane power supply.

Place your module in any I/O module slot of the I/O chassis except

for the extreme left slot. This slot is reserved for PC processors or

adapter modules.

!ATTENTION: Do not insert or remove modules from

the I/O chassis while system power is ON. Failure to

observe this rule could result in damage to module

circuitry.

Group your modules to minimize adverse affects from radiated

electrical noise and heat. We recommend the following.

•Group analog input and low voltage dc modules away from ac

modules or high voltage dc modules to minimize electrical noise

interference.

•Do not place this module in the same I/O group with a discrete

high-density I/O module when using 2-slot addressing. This

module uses a byte in both the input and output image tables for

block transfer.

The module is shipped with the A/B simulation jumper set in

position POS G for Series C applications. This setting returns input

data above and below the range end points. If you are replacing a

Series A or B 1771-IFE module with this module, reset the

simulation jumper to the POS E position as shown below.

POS G POS E

Simulation Jumper (shown in A/B position)

Top edge of circuit board

1. Locate the simulation jumper at the top edge

of the module circuit board.

2. Using your fingers, slide the jumper off the 2 posts.

3. Carefully position the jumper on 2 of the 3 posts that

correspond to your requirement.

Set the Series A/B Simulation Jumper A/B

Simulation Jumper

POS G POS E

Simulation Jumper (shown in series C position)

Top edge of circuit board

Series

A and B

Simulation

Series C

Application

Calculate Power

Requirements

Determine Module

Placement in the I/O

Chassis

Set the A/B Simulation

Jumper

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Analog Input Module4

Publication

17715.45 - July 1997

The module has configuration jumpers for determining the input type

(voltage or current) desired for each input. The module is shipped

with the configuration jumpers positioned for voltage mode and

the A/B simulation jumper set for Series C. If you are replacing a

Series A or B 1771-IFE module with this module, reset the

simulation jumper as shown above.

You can select either voltage or current for each input, but all inputs

must be either single-ended or differential. Do not mix single-ended

and differential inputs on the module.

Reposition the configuration jumpers associated with each input

channel according to your requirements

12

You can mix voltage mode and current mode settings on

the module. Make sure that the entire module is set for

either singleended or differential. Do not mix them.

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Channel

1 and 2

Channel

3 and 4

Channel

5 and 6

Channel

7 and 8

Channel

9 and 10

Channel

1

1 and 12

Channel

13 and 14

Channel

15 and 16

DifferentialSingleended

Voltage Mode

Differential

Current

Singleended

Current

Differential or Singleended (factory set)

Current Mode

Odd channel current

Even channel voltage

Even channel current

Odd channel voltage

Singleended

Configuration

Jumpers

Remove the four screws securing the side cover to

the module and remove the covers.

19805

11

Reposition the cover and secure with the four

screws removed in step 1.

19813

13

Position the keying bands in the backplane connectors

to correspond to the key slots on the module.

Place the keying bands:

between 10 and 12

between 24 and 26

You can change the position of these bands if

subsequent system design and rewiring makes

insertion of a different type of module necessary. Upper Connector

11022I

I/O chassis

Place your module in any slot in the chassis

except the leftmost slot which is reserved for

processors or adapters.

Key the Backplane Connector

4

Set the Configuration

Jumpers and Key the

Backplane Connector

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Analog Input Module 5

Publication

17715.45 - July 1997

!ATTENTION: Remove power from the 1771 I/O

chassis backplane and field wiring arm before

removing or installing an I/O module.

•Failure to remove power from the backplane or

wiring arm could cause module damage, degradation

of performance, or injury.

•Failure to remove power from the backplane could

cause injury or equipment damage due to possible

unexpected operation.

Place the module in the card guides on the top and bottom of the chassis that guide the module into position.

Important: Apply firm even pressure on the module to seat it into its

backplane connector.

1

Snap the chassis latch over the

top of the module to secure it.

Swing the chassis locking bar

down into place to secure the

modules. Make sure the locking

pins engage.

1771A1B, A2B, A3B1, A4B Series B I/O chassis1771A1B, A2B, A3B, A3B1, A4B I/O chassis

17643

wiring arm

install

remove

horizontal bar

Attach the wiring arm (1771WG) to the horizontal

bar at the bottom of the I/O chassis.

The wiring arm pivots upward and connects with

the module so you can install or remove the

module without disconnecting the wires. 1771WG

2

Install the Module and

Field Wiring Arm

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Analog Input Module6

Publication

17715.45 - July 1997

Connect your I/O devices to the cat. no. 1771-WG wiring arm

shipped with the module.

!ATTENTION: Remove power from the 1771 I/O

chassis backplane and field wiring arm before

removing or installing an I/O module.

•Failure to remove power from the backplane or

wiring arm could cause module damage, degradation

of performance, or injury.

•Failure to remove power from the backplane could

cause injury or equipment damage due to possible

unexpected operation.

Input connections for the 1771-IFE module with:

•single-ended inputs are shown on page 7

•differential inputs are shown on page 8

Minimizing Ground Loops

To minimize ground-loop currents on input circuits:

•use single-ended mode whenever possible

•use 2-wire transmitters with a common power supply

•separate 2-wire and 4-wire transmitters between different

modules

•tie 4-wire transmitter and/or separate power supply grounds

together

Important: We do not recommend mixing 2-wire and 4-wire

transmitter inputs on the same module. Power supply

placement can make it impossible to eliminate ground

loops.

Cable Lengths

Recommended maximum cable length for voltage-mode input

devices is 50 feet. This recommendation is based on considerations

of signal degradation and electrical noise immunity in typical

industrial environments. Cable length for current-mode input

devices need not be as restrictive because analog signals from these

devices are less sensitive to electrical noise interference.

Connect Wiring to the

Field Wiring Arm

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Analog Input Module 7

Publication

17715.45 - July 1997

- Jumper all unused channels to module

common to reduce noise.

Source Ground

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Channel 9

Channel 10

Channel 1

1

Channel 12

Channel 13

Channel 14

Channel 15

Channel 16

Module Common

1771WG

Field Wiring

Arm

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Attention: Analog input signals must be within +

14.25V referenced

to module common. This input signal includes any common mode

voltage present between either input terminal and module common.

If an input terminal exceeds this range, channeltochannel

crosstalk can cause invalid input readings and invalid underrange

or overrange bits.

The 1771IFE module does not supply loop power for the input device.

The user must supply loop power for looppowered input devices.

+

–

The sensor cable must be shielded. The shield must:

•

extend the length of the cable, but be connected only at the 1771 I/O chassis

•

extend up to the point of termination

Important:

The shield should extend to the termination point, exposing just enough cable to

adequately terminate the inner conductors. Use heat shrink or another suitable

insulation where the wire exits the cable jacket.

Power

Supply

+

_

- T

ie power supply grounds together to

minimize ground loops.

Note:

Refer to transmitter manufacturers

specifications for power supply connections.

2Wire

Transmitter

Power

Supply

NOTE:

- All module commons are electrical



ly tied together inside the module.

2Wire

Transmitter

Connection

Diagram for 16 Singleended Inputs and T

woW

ire T

ransmitters

-

Jumper all unused channels to module

common to reduce noise.

Source Ground

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Channel 9

Channel 10

Channel 1

1

Channel 12

Channel 13

Channel 14

Channel 15

Channel 16

Module Common

1771WG

Field Wiring

Arm

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Attention: Analog input signals must be within +

14.25V referenced

to module common. This input signal includes any common mode

voltage present between either input terminal and module common.

If an input terminal exceeds this range, channeltochannel

crosstalk can cause invalid input readings and invalid underrange

or overrange bits.

The 1771IFE module does not supply loop power for the input device.

The user must supply loop power for looppowered input devices.

+

–

The sensor cable must be shielded. The shield must:

•

extend the length of the cable, but be connected only at the 1771 I/O chassis

•

extend up to the point of termination

Important:

The shield should extend to the termination point, exposing just enough cable to

adequately terminate the inner conductors. Use heat shrink or another suitable

insulation where the wire exits the cable jacket.

+

_

- T

ie power supply grounds together to

minimize ground loops.

Note:

Refer to transmitter manufacturers

specifications for power supply connections.

NOTE:

- All module commons are electrical



ly tied together inside the module.

Power

Supply

4Wire

Transmitter

Power

Supply

4Wire

Transmitter

Connection

Diagram for 16 Singleended Inputs and FourW

ire T

ransmitters

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Analog Input Module8

Publication

17715.45 - July 1997

Source Ground

-

Unused channels must have their + and

 inputs jumpered together and tied to

module common to reduce noise.

1771WG

Field Wiring Arm

Attention: Analog input signals must be within +

14.25V referenced

to module common. If an input channel exceeds this range,

channeltochannel crosstalk can cause invalid input readings and

invalid underrange or overrange bits.

NOTE:

The 1771IFE module does not supply loop power for the input device.

The user must supply loop power for looppowered input devices.

+

–

Channel

1+

Channel 1

Channel 2+

Channel 2

Channel 3+

Channel 3

Channel 4+

Channel 4

Channel 5+

Channel 5

Channel 6+

Channel 6

Channel 7+

Channel 7

Channel 8+

Channel 8

Module Common

Not used

Module Common

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Configuring

the module for dif

ferential inputs does not provide isolation.

-T

ie power supply grounds together to

minimize ground loops.

Note:

Refer to transmitter manufacturers

specifications for power supply connections.

+

Power

Supply

2Wire

Transmitter Power

Supply

2Wire

Transmitter

–

The sensor cable must be shielded. The shield must:

•

extend the length of the cable, but be connected only at the 1771 I/O chassis

•

extend up to the point of termination

Important:

The shield should extend to the termination point, exposing just enough cable to

adequately terminate the inner conductors. Use heat shrink or another suitable

insulation where the wire exits the cable jacket.

Connection

Diagram for 8 Differential Inputs and T

woW

ire T

ransmitters

Source Ground

-

Unused channels must have their + and

 inputs jumpered together and tied to

module common to reduce noise.

1771WG

Field Wiring Arm

Attention: Analog input signals must be within +

14.25V referenced

to module common. If an input channel exceeds this range,

channeltochannel crosstalk can cause invalid input readings and

invalid underrange or overrange bits.

NOTE:

The 1771IFE module does not supply loop power for the input device.

The user must supply loop power for looppowered input devices.

+

–

Channel

1+

Channel 1

Channel 2+

Channel 2

Channel 3+

Channel 3

Channel 4+

Channel 4

Channel 5+

Channel 5

Channel 6+

Channel 6

Channel 7+

Channel 7

Channel 8+

Channel 8

Module Common

Not used

Module Common

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Configuring

the module for dif

ferential inputs does not provide isolation.

-T

ie power supply grounds together to

minimize ground loops.

Note:

Refer to transmitter manufacturers

specifications for power supply connections.

+

–

The sensor cable must be shielded. The shield must:

•

extend the length of the cable, but be connected only at the 1771 I/O chassis

•

extend up to the point of termination

Important:

The shield should extend to the termination point, exposing just enough cable to

adequately terminate the inner conductors. Use heat shrink or another suitable

insulation where the wire exits the cable jacket.

Power

Supply

4Wire

Transmitter

Power

Supply

4Wire

Transmitter

Connection

Diagram for 8 Differential Inputs and FourW

ire T

ransmitters

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Analog Input Module 9

Publication

17715.45 - July 1997

Ground the Chassis and Module

Use the following diagrams to ground your

I/O chassis and analog input module. Follow

these steps to prepare the cable:

Remove a length of cable

jacket from the Belden 8761 cable.

Pull the foil shield and bare

drain wire from the insulated wires.

Bare drain

wire

Insulated

wires

Foil

shield

Twist the foil shield and drain

wire together to form a single strand.

Attach a ground lug.

Belden

8761 Cable

2

When using shielded cable wire, ground the foil

shield and drain wire only at one end of the cable.

We recommend that you wrap the foil shield and

drain wire together and connect them to a chassis

mounting bolt.

At the opposite end of the cable, tape exposed

shield and drain wire with electrical tape to insulate

it from electrical contact.

1

3

4

Fold shield back, and apply shrink tubing to secure.

5

Refer to Industrial Automation Wiring

and Grounding Guidelines for Noise

Immunity, publication 1770-4.1, for

additional information.

Externaltooth

Washers

#10 Threadforming screw

Shield and Drain

twisted together

Singlepoint Grounding

Extend shield to termination point.

Expose just enough cable to adequately

terminate inner conductors.

Use heat shrink tubing

or other suitable

insulation where wire

exits cable jacket.

Grounding Stud

1Use

the cup washer if crimpon lugs are not used.

Chassis Ground

When you connect grounding conductors to the I/O chassis

grounding stud, place a star washer under the first lug, then

place a nut with captive lock washer on top of each ground lug.

Ground Lug

Ground Lug1

Star

Washer

I/O Chassis

Side Plate

Nut and Captive

Washer

Shield and Drain

twisted together

Nut

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Analog Input Module10

Publication

17715.45 - July 1997

Because of the many analog devices available and the wide variety

of possible applications, you must configure the module to conform

to the analog device and specific application that you have chosen.

Use the configuration information below to configure your module

to your specifications.

Dec. Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Description

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Description

Word 1 8 7 6 5 4 3 2 1

Range Selection  Channels 1 - 8

2 16 15 14 13 12 11 10 9

Range Selection  Channels 9 - 16

Input range selections

allow the

Bit 01 Bit 00

V

oltage or Current Input

Input range selections

allow the

user to configure the inputs for any of

7i t lt t T

0 0

1 to 5V dc, 4 to 20mA (default)

user

to

configure

the

inputs

for

any

of

7 input voltage or current ranges. T

wo

bits are required for each channel.

0 1

0 to 5V dc, 0 to 20mA

bits

are

required

for

each

channel

.

Bits 00 and 01 for channel 1, bits 02

and 03 for channel 2, etc.

1 0

5 to +5V dc, 20 to +20mA

and 03

f

or channel 2, etc.

1 1

10 to +10V dc, 0 to 10V dc

3 Real T

ime Sampling

Data

Format

Input

Type Digital Filter

Real time sampling, data format, input

type and digital filter

Digital filter

reduces ef

fect of noise on input. (Default is no

filter.)

Input type

, set bit for dif

ferential mode on all channels.

Reset (0)

= singleended inputs (default)

Set (1)

= dif

ferential inputs

Real time sampling

- Default is no R

TS.

Data format

- set to match

your processor

.

BCD (default)

Reserved

Two's

complement binary

Signed magnitude binary

Bit 10

(12)

Bit 09

(11)

0 0

0 1

1 0

1 1

4

Minimum sign bits, when set, designate negative minimum scaling values for the

corresponding input channels. Bit 00 corresponds to channel 1, bit 01 corresponds to

channel 2, etc.

Sign Bits, minimum scaling values

5

Maximum sign bits, when set, designate maximum scaling values that are negative.

Maximum scaling value must be greater than minimum on any particular channel. Bit 00

corresponds to channel 1, bit 01 corresponds to channel 2, etc.

Sign Bits, maximum scaling values

6, 8, 10, 12, 14, 16,

18, 20, 22, 24, 26,

28, 30, 32, 34, 36

Minimum scaling

values for each channel. Enter in BCD format.

Channel 1  minimum scaling

7, 9, 1

1, 13, 15, 17,

19, 21, 23, 25, 27,

29, 31, 33, 35, 37

Maximum scaling

values for each channel. Enter in BCD format.

Channel 1  maximum scaling

38

Offset calibration - Each bit represents a channel (bit 00 to channel 1, bit 01 to channel

2, etc.). When the bit is set, and a BTW has been sent, the module will read the channels

and adjust the offset to analog ground potential. In differential mode, bits 08 thru 15 (10

thru 17 in octal) are ignored. In current mode, apply 0mA.

Offset

Calibration

39

Gain calibration - Each bit represents a channel (bit 00 to channel 1, bit 01 to channel 2,

etc). When the bit is set, and a BTW has been sent, the module will read the channels and

adjust the gain correction values. If used on +, 0 to 5, or 1 to 5V ranges, a value of 5V is

expected. If used on +10V range, 10V is expected. In differential mode, bits 08 thru 15 (10

thru 17 in octal) are ignored. In current mode, apply 20mA.

Gain

Calibration

For

detailed configuration

information, see chapter 2 of

your

Analog Input User Manual

(publication 17716.5.1

15).

Configure the Module

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Analog Input Module 11

Publication

17715.45 - July 1997

Use the following table to read data from your input module.

Dec. Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Description

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Description

Word 1 HF EE CS RTS IS OR PU Diagnostics

Hardware fault - (HF) When this bit is set, the dc/dc

converter fuse has blown. Digital logic will continue

to operate.

EEPROM status bit - (EE) This bit is set if an error occurs

saving calibration data to nonvolatile memory. If this bit is set

at powerup, the data from the EEPROM did not pass the

checksum and no calibration values are used.

Calibration status bit - (CS) When calibrating the

module, this bit will be cleared if the calibration was

successful. If the bit is set, an incorrect voltage/current

was applied, or offset and gain calibrations were

attempted simultaneously.

Real time sample fault bit - (RTS) This bit is set if the module is

configured for RTS and a block transfer read has not occurred within

the user-programmed period.

Power up bit - (PU) Used by the

module to tell the processor that it is

alive but not yet configured. It is a key

element in the application program.

Out of range bit - (OR) This bit is sent to

tell the processor that one or more

channels are either over or under range.1

Invalid scaling bit - (IS) This bit reports that the

scaling is somehow invalid. Usually, both values

are equal or minimum is greater than maximum

when this bit comes on. Can also be an invalid

filter value.

Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Description

2 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Data underrange for channels 1-16

3 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Data overrange for channels 1-16

Underrange bits for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc.

1

These

1

to 5V dc, 4 to 20mA (default)

U

n

d

errange

bi

ts

f

or eac

h

c

h

anne

l

.

Bi

t

00

f

or c

h

anne

l

1

,

bi

t

01

f

or c

h

anne

l

2

, etc.

1

Th

ese

bits are set (1) at approximately the input range limits shown on the right. 0

to 5V dc, 0 to 20mA

bits are set (1) at approximately the input range limits shown on the right.

Overrange bits for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc.1These

bits are set (1) at approximately the input range limits shown on the right

5 to +5V dc, 20 to +20mA

g,,

bits are set (1) at approximately the input range limits shown on the right. 10 to +10V dc, 0 to 10V dc

4 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Polarity bits - Set when input is less than zero. Bit 00 for channel 1, bit 01 for channel

2, etc.

Data polarity for channels 1-16

5Channel 1 Input Channel 1 Input

6 Channel 2 Input Channel 2 Input

7 Channel 3 Input Channel 3 Input

8 Channel 4 Input Channel 4 Input

⇓⇓⇓⇓

20 Channel 16 Input Channel 16 Input

21 Offset calibration results bits - Each bit represents a channel. After a calibration BTW

has been sent, the module confirms calibration by echoing back the channels that were

calibrated during the offset calibration BTW. In differential mode, channels 09 thru 16

are zero.

Offset Calibration Results

22 Gain calibration results bits - Each bit represents a channel. After a calibration BTW

has been sent, the module confirms calibration by echoing back the channels that were

calibrated during the gain calibration BTW. In differential mode, channels 09 thru 16

are zero.

Gain Calibration Results

1Attention: If

an input terminal'

s voltage exceeds +

14.25V as referenced to module common, channeltochannel crosstalk can cause invalid input readings and invalid

underrange/overrange bits.

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Default Configuration

If a write block of five words with all zeroes is sent to the module,

default selections will be:

•1 to 5V dc or 4 to 20mA (dependent on configuration jumper

setting)

•BCD data format

•no real time sampling (RTS)

•no filtering

•no scaling

•single-ended inputs

The front panel of the analog input module contains a green RUN

indicator and a red FAULT indicator. At power-up, the module

momentarily turns on the red indicator as a lamp test, then checks

for:

•correct RAM operation

•firmware errors

If there is no fault, the red indicator turns off.

RUN

FLT

10528I

ANALOG

IN

(12 BIT)

Green RUN indicator

Red FAULT indicator

The green indicator comes on when the module is powered. It will

flash until the module is programmed. If a fault is found initially or

occurs later, the red fault indicator lights. The module also reports

status and specific faults (if they occur) in every transfer of data

(BTR) to the PC processor. Monitor the green and red indicators and

status bits in word 1 of the BTR file when troubleshooting your

module.

Interpret Status Indicators

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Analog Input Module 13

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Possible module fault causes and corrective action is described in the

following table.

Indicators Probable Cause Recommended Action

RUN (green on)

FLT (red off) Normal operation None

RUN (green blinking)

FLT (red off)

Awaiting configuration

Block Transfer Write

Send configuration BTW

RUN (green off)

FLT (red on)

Hardware failure in

module

Return module for repair

RUN (green off)

FLT (red off)

No power Turn off power. Remove and reinsert

module into chassis. Return power.

If problem still exists, and chassis power

supply is functioning properly, return the

module for repair.

Description Value

Inputs per module 16 singleended; 8 differential low level

Module Location 1771 I/O rack - 1 slot

Input voltage ranges (nominal)

+1 to +5V dc

0 to +5V dc

-5 to +5V dc

-10 to +10V dc

0 to +10V dc

Input current ranges (nominal)

+4 to +20mA

0 to +20mA

-20 to +20mA

Resolution 12-bit binary

12 bits plus sign on bipolar ranges

Accuracy 0.1% of full scale range @ 25oC

Linearity +1 LSB

Repeatability +1 LSB

Isolation Voltage Isolation meets or exceeds UL Standard 508, and CSA Standard

C22.2 No. 142.

Input overvoltage protection 200V (voltage mode)1

8V (current mode)2

Input overcurrent protection (current ranges) 30mA

Common mode voltage +14.25 Volts

Input impedance >10 Megohms for voltage ranges; 250 ohms for current ranges

Common mode rejection 80 db, dc-120 Hz

Current Requirements 500mA @ +5V from I/O chassis backplane

Power Dissipation 2.5 Watts (maximum)

Specifications continued on next page

For

detailed troubleshooting

information, see chapter 7 of

your

Analog Input User Manual

(publication 17716.5.1

15).

Troubleshooting

Specifications

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Analog Input Module14

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ValueDescription

Thermal Dissipation 8.52 BTU/hr (maximum)

Unscaled BCD and binary output to

processor

0000 to +409510 for polar ranges (0 to 5V, +1 to +5V, 0 to +20mA,

and +4 to +20mA)

-409510 to 409510 for bipolar ranges ( +5V, +10V, +20mA)

Engineering units sent to processor +999910 with selectable scaling

Internal scan rate

13.7 ms for 8 differential inputs (no digital filtering) -add 0.3ms for

filtering

27.4 ms for 16 single-ended input (no digital filtering) -add 0.3 for

filtering

Environmental conditions

Operational temperature:

Storage temperature:

Relative humidity: Operating

Storage

0 to 600C (32 to 1400F)

-40 to 850C (-40 to 1850F)

5 to 95% (without condensation)

5 to 85% (without condensation)

Conductors Wiring

Allen-Bradley 1771-IFE User manual

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