WAGO 1-channel input module for resistor bridges (DMS) User manual

Brand: WAGO

Model: 1-channel input module for resistor bridges (DMS)

Type: User manual

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WAGO-I/O-SYSTEM 750

Manual

750-491(/xxxx-xxxx)

1AI DMS

Channel Analog Input Module

for Resistor Bridges (DMS)

Version 1.2.0

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2 WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27

D-32423 Minden

Phone: +49 (0) 571/8 87 – 0

Fax: +49 (0) 571/8 87 – 1 69

E-Mail: [email protected]

Web: http://www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 5 55

Fax: +49 (0) 571/8 87 – 85 55

E-Mail: [email protected]

Every conceivable measure has been taken to ensure the accuracy and

completeness of this documentation. However, as errors can never be fully

excluded, we always appreciate any information or suggestions for improving the

documentation.

E-Mail: [email protected]

We wish to point out that the software and hardware terms as well as the

trademarks of companies used and/or mentioned in the present manual are

generally protected by trademark or patent.

=== Ende der Liste für Textmarke Einband_vorne ===

WAGO-I/O-SYSTEM 750 Table of Contents 3

750-491 1AI DMS

Manual

Version 1.2.0

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Table of Contents

1 Notes about this Documentation ................................................................. 5

1.1 Validity of this Documentation ................................................................. 5

1.2 Copyright ................................................................................................... 5

1.3 Symbols ..................................................................................................... 6

1.4 Number Notation ....................................................................................... 8

1.5 Font Conventions ...................................................................................... 8

2 Important Notes ........................................................................................... 9

2.1 Legal Bases ............................................................................................... 9

2.1.1 Subject to Changes ............................................................................... 9

2.1.2 Personnel Qualifications ....................................................................... 9

2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance with

Underlying Provisions .......................................................................... 9

2.1.4 Technical Condition of Specified Devices ......................................... 10

2.2 Safety Advice (Precautions) .................................................................... 11

3 Device Description ..................................................................................... 13

3.1 View ........................................................................................................ 14

3.2 Connectors ............................................................................................... 15

3.2.1 Data Contacts/Internal Bus ................................................................. 15

3.2.2 Power Jumper Contacts/Field Supply ................................................ 15

3.2.3 CAGE CLAMP

Connectors ............................................................. 16

3.3 Display Elements .................................................................................... 17

3.4 Operating Elements ................................................................................. 17

3.5 Schematic Diagram ................................................................................. 18

3.6 Technical Data ........................................................................................ 19

3.6.1 Device Data ........................................................................................ 19

3.6.2 Power Supply...................................................................................... 19

3.6.3 Communication .................................................................................. 19

3.6.4 Inputs .................................................................................................. 19

3.6.5 Connection Type ................................................................................ 20

3.6.6 Climatic Environmental Conditions ................................................... 20

3.7 Approvals ................................................................................................ 21

3.8 Standards and Guidelines ........................................................................ 21

4 Process Image ............................................................................................. 22

4.1 Application Example ............................................................................... 23

5 Mounting ..................................................................................................... 24

5.1 Mounting Sequence ................................................................................. 24

5.2 Inserting and Removing Devices ............................................................ 25

5.2.1 Inserting the I/O Module .................................................................... 25

5.2.2 Removing the I/O Module .................................................................. 26

4 Table of Contents WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

6 Connect Devices ......................................................................................... 27

6.1 Connecting a Conductor to the CAGE CLAMP

................................... 27

6.2 Connection Examples .............................................................................. 28

List of Figures ...................................................................................................... 30

List of Tables ........................................................................................................ 31

=== Ende der Liste für Textmarke Verzeichnis_ vorne ===

WAGO-I/O-SYSTEM 750 Notes about this Documentation 5

750-491 1AI DMS

Manual

Version 1.2.0

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1 Notes about this Documentation

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Always retain this documentation!

This documentation is part of the product. Therefore, retain the documentation

during the entire service life of the product. Pass on the documentation to any

subsequent user. In addition, ensure that any supplement to this documentation is

included, if necessary.

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1.1 Validity of this Documentation

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This documentation is only applicable to the I/O module 750-491 (1AI DMS) and

the variants listed in the table below.

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Table 1: Versions

Item Number

Designation

750-491

1AI DMS

750-491/000-001

1AI DMS/125 ms

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Documentation Validity for Variants

Unless otherwise indicated, the information given in this documentation applies to

listed variants.

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The I/O module 750-491 shall only be installed and operated according to the

instructions in this manual and in the manual for the used fieldbus

coupler/controller.

Consider power layout of the WAGO-I/O-SYSTEM 750!

In addition to these operating instructions, you will also need the manual for the

used fieldbus coupler/controller, which can be downloaded at www.wago.com.

There, you can obtain important information including information on electrical

isolation, system power and supply specifications.

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1.2 Copyright

This Manual, including all figures and illustrations, is copyright-protected. Any

further use of this Manual by third parties that violate pertinent copyright

provisions is prohibited. Reproduction, translation, electronic and phototechnical

filing/archiving (e.g., photocopying) as well as any amendments require the

written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.

Non-observance will involve the right to assert damage claims.

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6 Notes about this Documentation WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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1.3 Symbols

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Personal Injury!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

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Personal Injury Caused by Electric Current!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

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Personal Injury!

Indicates a moderate-risk, potentially hazardous situation which, if not avoided,

could result in death or serious injury.

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Personal Injury!

Indicates a low-risk, potentially hazardous situation which, if not avoided, may

result in minor or moderate injury.

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Damage to Property!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

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Damage to Property Caused by Electrostatic Discharge (ESD)!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

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Important Note!

Indicates a potential malfunction which, if not avoided, however, will not result in

damage to property.

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WAGO-I/O-SYSTEM 750 Notes about this Documentation 7

750-491 1AI DMS

Manual

Version 1.2.0

Additional Information:

Refers to additional information which is not an integral part of this

documentation (e.g., the Internet).

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8 Notes about this Documentation WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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1.4 Number Notation

Table 2: Number Notation

Number Code

Example

Note

Decimal

100

Normal notation

Hexadecimal

0x64

C notation

Binary

'100'

'0110.0100'

In quotation marks, nibble separated with

dots (.)

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1.5 Font Conventions

Table 3: Font Conventions

Font Type

Indicates

italic

Names of paths and data files are marked in italic-type.

e.g.: C:\Program Files\WAGO Software

Menu items are marked in bold letters.

e.g.: Save

A greater-than sign between two names means the selection of a

menu item from a menu.

e.g.: File > New

Input

Designation of input or optional fields are marked in bold letters,

e.g.: Start of measurement range

“Value”

Input or selective values are marked in inverted commas.

e.g.: Enter the value “4 mA” under Start of measurement range.

[Button]

Pushbuttons in dialog boxes are marked with bold letters in square

brackets.

e.g.: [Input]

[Key]

Keys are marked with bold letters in square brackets.

e.g.: [F5]

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WAGO-I/O-SYSTEM 750 Important Notes 9

750-491 1AI DMS

Manual

Version 1.2.0

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2 Important Notes

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This section includes an overall summary of the most important safety

requirements and notes that are mentioned in each individual section. To protect

your health and prevent damage to devices as well, it is imperative to read and

carefully follow the safety guidelines.

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2.1 Legal Bases

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2.1.1 Subject to Changes

WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any

alterations or modifications that serve to increase the efficiency of technical

progress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from

the granting of patents or from the legal protection of utility patents. Third-party

products are always mentioned without any reference to patent rights. Thus, the

existence of such rights cannot be excluded.

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2.1.2 Personnel Qualifications

All sequences implemented on WAGO-I/O-SYSTEM 750 devices may only be

carried out by electrical specialists with sufficient knowledge in automation. The

specialists must be familiar with the current norms and guidelines for the devices

and automated environments.

All changes to the coupler or controller should always be carried out by qualified

personnel with sufficient skills in PLC programming.

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2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance with

Underlying Provisions

Fieldbus couplers, fieldbus controllers and I/O modules found in the modular

WAGO-I/O-SYSTEM 750 receive digital and analog signals from sensors and

transmit them to actuators or higher-level control systems. Using programmable

controllers, the signals can also be (pre-) processed.

The devices have been developed for use in an environment that meets the IP20

protection class criteria. Protection against finger injury and solid impurities up to

12.5 mm diameter is assured; protection against water damage is not ensured.

Unless otherwise specified, operation of the devices in wet and dusty

environments is prohibited.

Operating the WAGO-I/O-SYSTEM 750 devices in home applications without

further measures is only permitted if they meet the emission limits (emissions of

interference) according to EN 61000-6-3. You will find the relevant information

in the section “Device Description” > “Standards and Guidelines” in the manual

for the used fieldbus coupler/controller.

10 Important Notes WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

Appropriate housing (per 94/9/EG) is required when operating the WAGO-I/O-

SYSTEM 750 in hazardous environments. Please note that a prototype test

certificate must be obtained that confirms the correct installation of the system in

a housing or switch cabinet.

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2.1.4 Technical Condition of Specified Devices

The devices to be supplied ex works are equipped with hardware and software

configurations, which meet the individual application requirements. WAGO

Kontakttechnik GmbH & Co. KG will be exempted from any liability in case of

changes in hardware or software as well as to non-compliant usage of devices.

Please send your request for modified and new hardware or software

configurations directly to WAGO Kontakttechnik GmbH & Co. KG.

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WAGO-I/O-SYSTEM 750 Important Notes 11

750-491 1AI DMS

Manual

Version 1.2.0

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2.2 Safety Advice (Precautions)

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For installing and operating purposes of the relevant device to your system the

following safety precautions shall be observed:

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Do not work on devices while energized!

All power sources to the device shall be switched off prior to performing any

installation, repair or maintenance work.

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Install the device only in appropriate housings, cabinets or in electrical

operation rooms!

The WAGO-I/O-SYSTEM 750 and its components are an open system. As such,

install the system and its components exclusively in appropriate housings,

cabinets or in electrical operation rooms. Allow access to such equipment and

fixtures to authorized, qualified staff only by means of specific keys or tools.

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Replace defective or damaged devices!

Replace defective or damaged device/module (e.g., in the event of deformed

contacts), since the long-term functionality of device/module involved can no

longer be ensured.

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Protect the components against materials having seeping and insulating

properties!

The components are not resistant to materials having seeping and insulating

properties such as: aerosols, silicones and triglycerides (found in some hand

creams). If you cannot exclude that such materials will appear in the component

environment, then install the components in an enclosure being resistant to the

above-mentioned materials. Clean tools and materials are imperative for handling

devices/modules.

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Clean only with permitted materials!

Clean soiled contacts using oil-free compressed air or with ethyl alcohol and

leather cloths.

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12 Important Notes WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

Do not use any contact spray!

Do not use any contact spray. The spray may impair contact area functionality in

connection with contamination.

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Do not reverse the polarity of connection lines!

Avoid reverse polarity of data and power supply lines, as this may damage the

devices involved.

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Avoid electrostatic discharge!

The devices are equipped with electronic components that may be destroyed by

electrostatic discharge when touched. Please observe the safety precautions

against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the

devices, please ensure that environmental factors (personnel, work space and

packaging) are properly grounded.

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WAGO-I/O-SYSTEM 750 Device Description 13

750-491 1AI DMS

Manual

Version 1.2.0

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3 Device Description

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The analog input module enables the direct connection of a resistor measurement

bridge. The bridge voltage U

and supply voltage U

ref

of the bridge are digitized

with a resolution of 16 bits.

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The input channels are available as two 16 bit values for further processing. The

measurement result can be calculated by the following formula:

Measured value = U

/ U

ref

My acquiring the supply voltage accurately together with the bridge voltage in a

transformer, long-term drift and temperature drift are compensated.

If the internal supply voltage (U

) is overloaded (I

Load

> 20 mA), an external

supply voltage is required.

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The assignment of the connections is described in the “Connectors” section.

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Connection examples are shown in section “Connecting Devices” > … >

“Connection Example(s)”.

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The operational readiness and the trouble-free internal data bus communication of

the channels are indicated via a green function LED.

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A red fault LED per channel indicates a wire break or that the signal is outside the

measuring range.

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The meaning of the LEDs is described in the “Display Elements” section.

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Both the potential groups and the individual modules within these groups can be

arranged in any combination when designing the field bus node.

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Power to the internal electronics is supplied via internal data bus.

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Use a supply module!

Use a supply module for field-side power supply of downstream I/O modules.

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The I/O module 750-491 can be used with all fieldbus couplers/controllers of the

WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324

and -327).

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14 Device Description WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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3.1 View

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Figure 1: View of device

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Table 4: Legend for Figure “View”

Pos.

Description

Details See Section

Marking possibility with

Mini-WSB

---

Status LEDs

“Device Description” > “Display Elements”

Data contacts

“Device Description” > “Connectors”

CAGE CLAMP

connectors

“Device Description” > “Connectors”

Release tab

“Mounting” > ”Inserting and Removing

Devices”

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WAGO-I/O-SYSTEM 750 Device Description 15

750-491 1AI DMS

Manual

Version 1.2.0

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3.2 Connectors

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3.2.1 Data Contacts/Internal Bus

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Communication between the fieldbus coupler/controller and the I/O modules as

well as the system supply of the I/O modules is carried out via the internal bus. It

is comprised of 6 data contacts, which are available as self-cleaning gold spring

contacts.

Figure 2: Data Contacts

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Do not place the I/O modules on the gold spring contacts!

Do not place the I/O modules on the gold spring contacts in order to avoid soiling

or scratching!

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Ensure that the environment is well grounded!

The devices are equipped with electronic components that may be destroyed by

electrostatic discharge. When handling the devices, ensure that the environment

(persons, workplace and packing) is well grounded. Avoid touching conductive

components, e.g. data contacts.

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3.2.2 Power Jumper Contacts/Field Supply

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The I/O module 750-491 has no power jumper contacts.

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16 Device Description WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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3.2.3 CAGE CLAMP

Connectors

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Figure 3: CAGE CLAMP

Connections

Table 5: Legend for “CAGE CLAMP

Connections” Figure

Chann

Designatio

Connectio

Function

Bridge voltage +

−U

Bridge voltage −

−U

Supply voltage, internal –

Shield termination

ref

Supply voltage, external +

−U

ref

Supply voltage, external −

Supply voltage, internal +

Shield termination

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Use shielded signal lines!

Only use shielded signal lines for analog signals and I/O modules which are

equipped with shield clamps. Only then can you ensure that the accuracy and

interference immunity specified for the respective I/O module can be achieved

even in the presence of interference acting on the signal cable.

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WAGO-I/O-SYSTEM 750 Device Description 17

750-491 1AI DMS

Manual

Version 1.2.0

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3.3 Display Elements

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Figure 4: Display elements750-491

Table 6: Legend for the “Display Elements” Figure750-491

Chann

Designation

LED

State Function

Function

OFF

Not ready for operation or no or

interrupted internal bus communication

Green

Ready for operation and uninterrupted

internal bus communication

Error

OFF

Normal operation

Red

Bridge voltage U

out of range or wire

break

Function

Uref

OFF

Not ready for operation or no or

interrupted internal bus communication

Green

Ready for operation and uninterrupted

internal bus communication

Error

Uref

OFF

Normal operation

Red

Supply voltage U

ref

out of range

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3.4 Operating Elements

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The I/O module 750-491 has no operating elements.

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18 Device Description WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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3.5 Schematic Diagram

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Figure 5: Schematic Switching Diagram

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WAGO-I/O-SYSTEM 750 Device Description 19

750-491 1AI DMS

Manual

Version 1.2.0

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3.6 Technical Data

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3.6.1 Device Data

Table 7: Technical Data — Device

Width

12 mm

Height (from top edge of DIN rail)

64 mm

Depth

100 mm

Weight

approx. 60 g

3.6.2 Power Supply

Table 8: Technical Data – Power Supply

Power supply

Via system voltage DC/DC

Current consumption, system voltage

typ.

(5 VDC)

65 mA

Supply voltage U

5 VDC, 20 mA

3.6.3 Communication

Table 9: Technical Data – Communication

Data width, internal (internal data bus)

2 × 16 bit data,

2 × 8 bit control/status (option)

3.6.4 Inputs

Table 10: Technical Data – Inputs

Number of inputs

2, for bridge connection

Signal voltage U

−15 mV … +15 mV

Signal voltage U

ref

+2 V … +6 V

Inner flow resistance U

> 1 MΩ

Inner flow resistance U

ref

> 200 kΩ

Common mode voltage U

ref

±35 V

Measuring error U

±30 μV

Measuring error U

ref

±10 mV

Resolution

16 bits

Conversion time

750-491

500 ms

750-491/000-001

125 ms

Filter

750-491

50 Hz

750-491/000-001

200 Hz

Isolation (peak value)

500 V system/supply

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20 Device Description WAGO-I/O-SYSTEM 750

750-491 1AI DMS

Manual

Version 1.2.0

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3.6.5 Connection Type

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Table 11: Technical Data – Field Wiring

Wire connection

CAGE CLAMP

Cross section

0.08 mm² … 2.5 mm², AWG 28 … 14

Stripped lengths

8 mm … 9 mm / 0.33 in

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Table 12: Technical Data – Data Contacts

Data contacts

Slide contact, hard gold plated, self-

cleaning

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3.6.6 Climatic Environmental Conditions

Table 13: Technical Data – Climatic Environmental Conditions

Operating temperature range

0 °C … 55 °C

Storage temperature range

−25 °C … +85 °C

Relative humidity without condensation

Max. 95 %

Resistance to harmful substances

Acc. to IEC 60068-2-42 and

IEC 60068-2-43

Maximum pollutant concentration at