WAGO 750-461, 750-461/000-002, 750-461/000-003, 750-461/000-004, 750-461/000-005 User guide

Fieldbus Independent
I/O Modules

Analog Input Modules for RTD's
750-461, (/xxx-xxx)

Manual

Version 1.1.2

ii • General

Copyright © 2006 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27
D-32423 Minden

Phone: [phone] – 0
Fax: [phone] – 1 69

E-Mail: [e-mail]
Web: http://www.wago.com

Technical Support

Phone: [phone] – 5 55
Fax: [phone] – 85 55

E-Mail: [e-mail]

Every conceivable measure has been taken to ensure the correctness and com­pleteness of this documentation. However, as errors can never be fully ex­cluded, we would appreciate any information or ideas at any time.

E-Mail: [e-mail]
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 trademark or patent protected.

WAGO-I/O-SYSTEM 750
I/O Modules

Content • iii

Content

1 Important Comments .................................................................................4

1.1 Legal Principles........................................................................................4

1.1.1 Copyright............................................................................................. 4

1.1.2 Personnel Qualification ....................................................................... 4

1.1.3 Intended Use........................................................................................ 4

1.2 Symbols.................................................................................................... 5

1.3 Number Notation......................................................................................5

1.4 Safety Notes .............................................................................................6

1.5 Scope ........................................................................................................6

2 I/O Modules .................................................................................................7

2.1 Analog Input Modules..............................................................................7

2.1.1 Overview Analog Input Modules for RTD's 750-461, (/xxx-xxx)......7

2.1.2 750-461, (/xxx-xxx) [2 AI Pt100/ RTD] .............................................8

2.1.2.1 View................................................................................................8

2.1.2.2 Variations........................................................................................8

2.1.2.3 Description......................................................................................9

2.1.2.4 Display Elements ..........................................................................10

2.1.2.5 Schematic Diagram.......................................................................11

2.1.2.6 Technical Data ..............................................................................12

2.1.2.7 Process Image ............................................................................... 13

2.1.2.7.1 I/O Modules for Pt Resistance Sensors......................................... 14

2.1.2.7.1.1 Pt 100 .......................................................................................15

2.1.2.7.1.2 Pt 1000 .....................................................................................15

2.1.2.7.1.3 Pt 100 with Status Information for S5-FB250 in Data Word...16

2.1.2.7.2 I/O Modules for Ni Resistance Sensors........................................ 17

2.1.2.7.2.1 Ni 100.......................................................................................17

2.1.2.7.2.2 Ni 1000.....................................................................................18

2.1.2.7.3 I/O Modules for Resistance Measuring ........................................ 19

2.1.2.8 Adjustable 750-461/003-000 Variation ........................................20

2.1.3 750-461/020-000 [2 AI NTC 20kOhm]............................................. 22

2.1.3.1 View..............................................................................................22

2.1.3.2 Description....................................................................................23

2.1.3.3 Display Elements ..........................................................................24

2.1.3.4 Schematic Diagram.......................................................................24

2.1.3.5 Technical Data ..............................................................................25

2.1.3.6 Process Image ............................................................................... 26

WAGO-I/O-SYSTEM 750
I/O Modules

4 • Important Comments Legal Principles

1 Important Comments

To ensure fast installation and start-up of the units described in this manual,
we strongly recommend that the following information and explanations are
carefully read and abided by.

1.1 Legal Principles

1.1.1 Copyright

This manual is copyrighted, together with all figures and illustrations
contained therein. Any use of this manual which infringes the copyright
provisions stipulated herein, is not permitted. Reproduction, translation and
electronic and photo-technical archiving and amendments require the written
consent of WAGO Kontakttechnik GmbH & Co. KG. Non-observance will
entail the right of claims for damages.

WAGO Kontakttechnik GmbH & Co. KG reserves the right to perform
modifications allowed by technical progress. In case of grant of a patent or
legal protection of utility patents all rights are reserved by WAGO
Kontakttechnik GmbH & Co. KG. Products of other manufacturers are always
named without referring to patent rights. The existence of such rights can
therefore not be ruled out.

1.1.2 Personnel Qualification

The use of the product detailed in this manual is exclusively geared to
specialists having qualifications in PLC programming, electrical specialists or
persons instructed by electrical specialists who are also familiar with the valid
standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability
resulting from improper action and damage to WAGO products and third party
products due to non-observance of the information contained in this manual.

1.1.3 Intended Use

For each individual application, the components supplied are to work with a
dedicated hardware and software configuration. Modifications are only
permitted within the framework of the possibilities documented in the
manuals. All other changes to the hardware and/or software and the non­conforming use of the components entail the exclusion of liability on part of
WAGO Kontakttechnik GmbH & Co. KG.

Please direct any requirements pertaining to a modified and/or new hardware
or software configuration directly to WAGO Kontakttechnik GmbH & Co.
KG.

WAGO-I/O-SYSTEM 750
I/O Modules

Symbols • 5
Intended Use

1.2 Symbols

Danger
Always abide by this information to protect persons from injury.

Warning
Always abide by this information to prevent damage to the device.

Attention
Marginal conditions must always be observed to ensure smooth operation.

ESD (Electrostatic Discharge)
Warning of damage to the components by electrostatic discharge. Observe
the precautionary measure for handling components at risk.

Note
Routines or advice for efficient use of the device and software optimization.

More information
References on additional literature, manuals, data sheets and INTERNET
pages

1.3 Number Notation

Number Code Example Note

Decimal 100 normal notation
Hexadecimal 0x64 C notation
Binary '100'

'0110.0100'

Within ',
Nibble separated with dots

WAGO-I/O-SYSTEM 750
I/O Modules

6 • Important Comments
Safety Notes

1.4 Safety Notes

Warning
Switch off the system prior to working on bus modules!

In the event of deformed contacts, the module in question is to be replaced, as
its functionality can no longer be ensured on a long-term basis.

The components are not resistant against materials having seeping and
insulating properties. Belonging to this group of materials is: e.g. aerosols,
silicones, triglycerides (found in some hand creams).

If it cannot be ruled out that these materials appear in the component
environment, then additional measures are to be taken:

- installation of the components into an appropriate enclosure

- handling of the components only with clean tools and materials.

Attention
Cleaning of soiled contacts may only be done with ethyl alcohol and leather
cloths. Thereby, the ESD information is to be regarded.

1.5 Scope

Do not use any contact spray. The spray may impair the functioning of the
contact area.

The WAGO-I/O-SYSTEM 750 and its components are an open system. It
must only be assembled in housings, cabinets or in electrical operation
rooms. Access must only be given via a key or tool to authorized qualified
personnel.

The relevant valid and applicable standards and guidelines concerning the
installation of switch boxes are to be observed.

ESD (Electrostatic Discharge)
The modules are equipped with electronic components that may be destroyed
by electrostatic discharge. When handling the modules, ensure that the
environment (persons, workplace and packing) is well grounded. Avoid
touching conductive components, e.g. gold contacts.

This manual describes the Analog Input Modules 750-461, (/xxx-xxx)
Analog Input Modules for RTD's of the modular WAGO-I/O-SYSTEM 750.

Handling, assembly and start-up are described in the manual of the Fieldbus
Coupler. Therefore this documentation is valid only in the connection with the
appropriate manual.

WAGO-I/O-SYSTEM 750
I/O Modules

Analog Input Modules • 7 Overview Analog Input Modules for RTD's 750-461, (/xxx-xxx)

2 I/O Modules

2.1 Analog Input Modules

2.1.1 Overview Analog Input Modules for RTD's 750-461, (/xxx-xxx)

I/O Module 750-461

Function PT100/

RTD

Channels 2 2 2 2 2

Measuring
range

Counter depth 2 x 16 bits

-200 °C ...
+850 °C

Data
2 x 8 bits
Control/
Status
(option)

750-461/

000-002

Resistance
Measuring
10R-1k2

10 Ω ...
1,2 kΩ

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

750-461/

000-003

PT1000/
RTD

-200 °C ...
+850 °C

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

750-461/

000-004

Ni 100/
RTD

-60 °C ...
+250 °C

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

750-461/

000-005

Ni 1000/
RTD

-60 °C ...
+250 °C

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

I/O Module

Function PT100/

750-461/

000-006

RTD/
high
precision

750-461/

000-007

Resistance
Measuring
10R-5k0

750-461/

000-200

PT100/
RTD/
with
status
informatio
ns

750-461/

003-000

PT100/
RTD/
adjustable

750-461/

020-000

NTC
20kOhm

Channels 2 2 2 2 2

Measuring
range

Counter depth 2 x 16 bits

WAGO-I/O-SYSTEM 750
I/O Modules

-200 °C ...
+850 °C

Data
2 x 8 bits
Control/
Status
(option)

10 Ω ...
5,0 kΩ

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

-200 °C ...
+850 °C,

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

-200 °C ...
+850 °C

2 x 16
bits Data
2 x 8 bits
Control/
Status
(option)

-30 °C ...
+130 °C

2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

8 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD] View

2.1.2 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]

2-Channel Analog Input Module for RTDs
2- or 3-wire connection

2.1.2.1 View

13 14

Function AI 1

Error AI 1

+R 1

A

B

+R1 +R2

RL1 RL2

C

D

Function AI 2
Error AI 2

Data contacts

+R 2

2-conductor

3-conductor

Fig. 2.1.2-1: 2-Channel Analog Input Module 750-461 g046100e

2.1.2.2 Variations

Item-No. Designation Description

Pt resistance sensors

750-461 2 AI PT100/RTD 2-Channel Analog Input Module, Pt 100

750-461/000-003 2 AI PT1000/RTD 2-Channel Analog Input Module, Pt 1000

750-461/000-006 2 AI PT100/RTD/

RL 1

-R 1

Shield

(screen)

-R1 -R2

SS

750-461

high precision

RL 2

-R 2

Shield
(screen)

Measuring range: -200 °C ... +850 °C

Measuring range: -200 °C ... +850 °C

2-Channel Analog Input Module, Pt 100
Measuring range: -200 °C ... +850 °C

750-461/000-200 2 AI PT100/RTD/

With status information

2-Channel Analog Input Module, Pt 100
Measuring range: -200 °C ... +850 °C,
With status information for S5-FB250

Ni resistance sensors

750-461/000-004 2 AI Ni 100/RTD 2-Channel Analog Input Module, Ni 100

Measuring range: -60 °C ... +250 °C

750-461/000-005 2 AI Ni 1000/RTD 2-Channel Analog Input Module, Ni 1000

Measuring range: -60 °C ... +250 °C

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 9
Description

Item-No. Designation Description

Resistance measuring

750-461/000-002 2 AI Resistance

750-461/000-007 2 AI Resistance

Operating mode configurable with WAGO-I/O-CHECK

750-461/003-000 2 AI PT100/RTD/

2.1.2.3 Description

The 750-461 analog input module and its 750-461/xxx-xxx variations allow
Pt or Ni Resistive Temperature Devices, RTDs, to be measured in the field.
It can also be used to measure resistances in the field.

Depending on the operating mode, the resistance value is converted to a
temperature or directly sent out by the module. A microprocessor within the
module is used for converting and linearizing the measured resistance value
into a numeric value proportional to the temperature of the selected resistance
sensor.

Measuring, 10R-1k2

Measuring, 10R-5k0

Adjustable

2-Channel Analog Input Module,
Resistance measuring,
Measuring range: 10 Ω ... 1,2 kΩ

2-Channel Analog Input Module,
Resistance measuring,
Measuring range: 10 Ω ... 5,0 kΩ

2-Channel Analog Input Module,
Adjustable; Factory preset: Pt 100
Measuring range: -200 °C ... +850 °C

The operating mode of the 750-461/003-000 variation can be set by using the
WAGO-I/O-CHECK 2 start-up and diagnostic tool (Item No.: 759-302). The
default setting is Pt 100. After setting the parameters, the module behaves like
the version with the selected operating mode.

The operating mode of the 750-461 basic module described in this manual is
for a Pt 100 resistance sensor.
The analog input module is a 2- to 3-conductor device and has 2 input
channels. Two devices may be directly connected to the module.

For example, two 3-wire sensors can be connected either to +R1, RL1 and –
R1 or to +R2, RL2 and –R2.
For the connection of 2-wire sensors, putting of a bridge is necessary between
+R1 and RL1 or +R2 and RL2.

The shield (screen) is directly connected to the DIN rail. A capacitive
connection is made automatically when snapped onto the DIN rail.

An optocoupler is used for electrical isolation between the bus and the field
side.

The operational readiness and trouble-free internal data bus communication of
the channels are indicated via a green function LED. A broken wire, short­circuit or overrange are indicated by a red error LED per channel.

WAGO-I/O-SYSTEM 750
I/O Modules

10 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Display Elements

After the error has been corrected, the module needs up to 4 seconds to output
a correct measured value, the module 750-461/000-006 needs up to 12
seconds.

Any configuration of the input modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.

Attention

This module has no power contacts. For field supply to downstream I/O
modules, a supply module will be needed.

The analog input module 750-461 and its variations can be used with all
couplers/controllers of the WAGO-I/O-SYSTEM 750 (except for the economy
types 750-320, -323, -324 and -327).

2.1.2.4 Display Elements

LED Channel State Function

No operational readiness or the internal data bus

off

A
green

communication is interrupted

Operational readiness and trouble-free internal data

on

bus communication

13 14

A

A
B

Fig. 2.1.2-2:
Display Elements

g045202x

C

B

D

C
D

B
red

C
green

D
red

off Normal operation

750-461,

1

2

750-461/000-003,

-004, -005, -006

750-461/000-200 Overrange of the admissible

on

750-461/000-002 Overrange/underflow of the

750-461/000-007 Overrange of the admissible

No operational readiness or the internal data bus

off

communication is interrupted

Operational readiness and trouble-free internal data

on

bus communication

off Normal operation

750-461,
750-461/000-003,

-004, -005, -006

750-461/000-200 Overrange of the admissible

on

750-461/000-002 Overrange/underflow of the

Overrange/underflow of the
admissible measuring range,
broken wire

measuring range, broken wire

admissible measuring range

measuring range

Overrange/underflow of the
admissible measuring range,
broken wire

measuring range, broken wire

admissible measuring range

750-461/000-007 Overrange of the admissible

measuring range

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 11
Schematic Diagram

2.1.2.5 Schematic Diagram

+R1 +R2

2

RL1

3

-R1

Shield

4

(screen)

750-461

6

RL2

7

-R2

8

+R

RL

-R

Shield

(screen)

10nF

270pF

270pF

MUX

A

D

Function

Logic

Error

5

1

Fig. 2.1.2-3: 2-Channel Analog Input Module 750-461 g046101e

WAGO-I/O-SYSTEM 750
I/O Modules

12 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Technical Data

2.1.2.6 Technical Data

Module Specific Data

Number of inputs 2

Voltage supply via system voltage DC /DC

Current consumption

Sensor types

(the free configurable variation supports all
listed sensor types)

(internal) 80 mA

max.

Pt 100 (factory preset), optionally orderable
variants for Pt 200, Pt 500, Pt 1000,
Ni 100, Ni 120, Ni 1000, resistance measuring.

Sensor connection 3-wire (factory preset) or 2-wire

Temperature range -200 °C ... +850 °C (Pt)

-60 °C ... +250 °C (Ni)

Resolution 0,1 °C

Conversion time 320 ms (per channel)

960 ms (per channel for 750-461/000-006)

Response delay

(time from starting or connecting the sensor to
the first proper measured value)

Measuring error

max.

25°C

Temperature coefficient

4 s
12 s (for 750-461/000-006)

<± 0.2 % of full scale value

<± 0.01 % /K of full scale value
<± 0,001 % /K of full scale value (for
750-460/000-006)

Isolation 500 V (System/Supply)

Measured current

0.5 mA

typ.

Bit width 2 x 16 bits data

2 x 8 bits control/status (option)

Dimensions (mm) W x H x L 12 x 64* x 100

* from upper edge of 35 DIN rail

Weight ca. 55 g

Standards and Regulations (cf. Chapter 2.2 of the Coupler/Controller Manual)

EMC-Immunity to interference (CE) acc. to EN 50082-2 (96)

EMC-Emission of interference (CE) acc. to EN 50081-1 (93)

EMC-Immunity to interference

acc. to Germanischer Lloyd (01)

(Ship building)

EMC-Emission of interference

acc. to Germanischer Lloyd (01)

(Ship building)

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 13 Process Image

Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)

(UL508)

CULUS

ABS (American Bureau of Shipping)

BV (Bureau Veritas)

DNV (Det Norske Veritas) Cl. B

GL (Germanischer Lloyd) Cat. A, B, C, D

KR (Korean Register of Shipping)

LR (Lloyd's Register) Env. 1, 2, 3, 4

More Information
Detailed references to the approvals are listed in the document "Overview
Approvals WAGO-I/O-SYSTEM 750", which you can find on the CD ROM
ELECTRONICC Tools and Docs (Item-No.: 0888-0412)
or in the internet under:

www.wago.com ! Documentation ! WAGO-I/O-SYSTEM 750 !

System Description

2.1.2.7 Process Image

NKK (Nippon Kaiji Kyokai)

RINA (Registro Italiano Navale)

(UL1604) Class I Div2 ABCD T4A

CULUS

KEMA II 3 G EEx nA II T4

Conformity Marking

Some fieldbus systems can process input channel status information by means
of a status byte.
This status byte can be displayed via the WAGO-I/O-CHECK 2 start-up and
diagnostic tool. However, processing via the coupler / controller is optional,
which means that accessing or parsing the status information depends on the
fieldbus system.

WAGO-I/O-SYSTEM 750
I/O Modules

14 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Process Image

Attention

The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/-controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.

2.1.2.7.1 I/O Modules for Pt Resistance Sensors

Pt resistance sensors (Measuring range: -200 °C ... +850 °C)

750-461 Evaluation of Pt 100

750-461/000-003 Evaluation of Pt 1000

750-461/000-006 Evaluation of Pt 100, high precision

(0.001%/K) (Conversion time 960ms)

750-461/000-200 Evaluation of Pt 100, with status information

for S5-FB250

To evaluate the platinum resistance sensors (750-461, 750-461/000-003 and
750-461/000-006) the measured values of the resistance are converted and
sent as temperature values.
All temperature values are represented in a standard numeric format. The
possible numerical range matches the defined temperature range of the Pt
sensors from -200 °C to +850 °C.
In the Pt 100 or Pt 1000 setting, the temperature values of the sensors are
represented with a resolution of 1 digit per 0.1 °C within a word (16 bits).
Thus, 0 °C corresponds to the numeric value 0x0000 and 100 °C to 0x03E8
(dec. 1000).
Temperature values below 0 °C are represented in two’s complement binary
form.

The measured values of the resistance are directly sent by the 750-461/000­200 (Pt 100) module.

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 15
Process Image

2.1.2.7.1.1 Pt 100

The analog input modules 750-461 and 750-461/000-006 transmit 16-bit
measured values per channel as well as 8 optional status bits to the
coupler/controller.
However, accessing the status byte depends on the fieldbus system being used.

750-461, /000-006 (Pt 100)

Tem-

perature

°C

<-200.0 10.00 '1000.0000.0000.0001' 0x8001 -32767 0x41 on

-200.0 18.49 '1111.1000.0011.0000' 0xF830 -2000 0x00 off

-100.0 60.25 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off

0.0 100.00 '0000.0000.0000.0000' 0x0000 0 0x00 off

100.0 138.50 '0000.0011.1110.1000' 0x03E8 1000 0x00 off

200.0 175.84 '0000.0111.1101.0000' 0x07D0 2000 0x00 off

500.0 280.90 '0001.0011.1000.1000' 0x1388 5000 0x00 off

750.0 360.47 '0001.1101.0100.1100' 0x1D4C 7500 0x00 off

800.0 375.51 '0001.1111.0100.0000' 0x1F40 8000 0x00 off

850.0 390.26 '0010.0001.0011.0100' 0x2134 8500 0x00 off

>850.0 >390.26 '0010.0001.0011.0100' 0x2134 8500 0x42 on

Broken wire against RL '0010.0001.0011.0100' 0x2134 8500 0x42 on

1)

Temperature values below 0 °C are represented in two’s complement binary form.

Resis-

tance

!

Numerical value 1)

binary hex. dec. Hex. AI 1, 2

Status-

byte

LED

Error

2.1.2.7.1.2 Pt 1000

The analog input modules 750-461/000-003 transmit 16-bit measured values
per channel as well as 8 optional status bits to the coupler/controller.
However, accessing the status byte depends on the fieldbus system being used.

The measured value can exceed the range from decimal –2000 to 8500 until the limitation
applies.

750-461/000-003 (Pt 1000)

Tem-

perature

°C

<-200.0 100.00 '1000.0000.0000.0001' 0x8001 -32767 0x41 on

-200.0 184.93 '1111.1000.0011.0000' 0xF830 -2000 0x00 off

-100.0 602.54 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off

0.0 1000.00 '0000.0000.0000.0000' 0x0000 0 0x00 off

100.0 1385.00 '0000.0011.1110.1000' 0x03E8 1000 0x00 off

200.0 1758.40 '0000.0111.1101.0000' 0x07D0 2000 0x00 off

500.0 2808.96 '0001.0011.1000.1000' 0x1388 5000 0x00 off

750.0 3604.65 '0001.1101.0100.1100' 0x1D4C 7500 0x00 off

800.0 3755.09 '0001.1111.0100.0000' 0x1F40 8000 0x00 off

850.0 3902.62 '0010.0001.0011.0100' 0x2134 8500 0x00 off

>850.0 >3902.62 '0010.0001.0011.0100' 0x2134 8500 0x42 on

Broken wire against RL '0010.0001.0011.0100' 0x2134 8500 0x42 on

1)

Temperature values below 0 °C are represented in two’s complement binary form.

Resis-

tance

!

Numerical value 1)

binary hex. dec. Hex. AI 1, 2

Status-

byte

LED

Error

The measured value can exceed the range from decimal –2000 to 8500 until the limitation
applies.

WAGO-I/O-SYSTEM 750
I/O Modules

16 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Process Image

2.1.2.7.1.3 Pt 100 with Status Information for S5-FB250 in Data Word

The analog input module 750-461/000-200 transmits 16-bit measured values
per channel as well as 8 optional status bits to the coupler/controller.

When a S5 is used as higher-level control system, this data can be directly
processed using the FB 250 function block.

However, accessing the status byte depends on the fieldbus system being used.

The status information is mapped to bits 0 to 2 and the digitized measured
value to bits 3 to 14.

750-461/000-200

Tem-

perature

°C ! binary XFÜ

-200.0 20 '0000.0110.0110.0 000' 0x0660 1638 0x00 off

-185.0 25 '0000.1000.0000.0 000' 0x0800 2048 0x00 off

-125.0 50 '0001.0000.0000.0 000' 0x1000 4096 0x00 off

0.0 100 '0010.0000.0000.0 000' 0x2000 8192 0x00 off

266.0 200 '0100.0000.0000.0 000' 0x4000 16384 0x00 off

560.0 300 '0110.0000.0000.0 000' 0x6000 24576 0x00 off

850.0 390 '0111.1100.1100.1 000' 0x7CC8 32949 0x00 off

1

Status information: X: not used, F: short-circuit, broken wire, Ü: overrange

2)

Temperature values below 0 °C are represented in two’s complement binary form.

Resis-

tance

10 '0000.0011.0011.0 000' 0x0330 819 0x00 off

800 '1111.1111.1111.1 000' 0xFFF8 65535 0x00 off

>800 undefined 0x00 off

>ca.1200 '0001.0000.0001.0 001' 0x1011 4113 0x42 on

Numerical value 2)

with status information 1)

hex. dec. hex. AI 1,2

1)

Status-

byte

LED

Error

Values marked with "ca." are not calibrated.

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 17
Process Image

2.1.2.7.2 I/O Modules for Ni Resistance Sensors

Ni resistance sensors (Measuring range: -60 °C ... +250 °C)

750-461/000-004 Evaluation of Ni 100

750-461/000-005 Evaluation of Ni 1000

To evaluate the nickel resistance sensors, the measured values of the
resistance are converted and sent as temperature values.
All temperature values are represented in a standard numeric format. The
possible numerical range matches the defined temperature range of the Ni
sensors from -60 °C to +250 °C.

2.1.2.7.2.1 Ni 100

In the Ni 100 setting 750-461/000-004, the temperature values of the sensors
are represented with a resolution of 1 digit per 0.1 °C within a word (16 bits).
Thus, 0 °C corresponds to the numeric value 0x0000 and 100 °C to 0x03E8
(dec. 1000).
Temperature values below 0 °C are represented in two’s complement binary
form.

The analog input modules transmits 16-bit measured values per channel as
well as 8 optional status bits to the coupler/controller.

750-461/000-004 (Ni 100)

Tem-

perature

°C

<-60.0 < 69.16 '1000.0000.0000.0001' 0x8001 -32767 0x41 on

-60.0 69.16 '1111.1101.1010.1000' 0xFDA8 -600 0x00 off

-50.0 74.26 '1111.1110.0000.1100' 0xFE0C -500 0x00 off

0.0 100.00 '0000.0000.0000.0000' 0x0000 0 0x00 off

50.0 129.10 '0000.0001.1111.0100' 0x01F4 500 0x00 off

100.0 161.77 '0000.0011.1110.1000' 0x03E8 1000 0x00 off

150.0 198.62 '0000.0101.1101.1100' 0x05DC 1500 0x00 off

200.0 240.64 '0000.0111.1101.0000' 0x07D0 2000 0x00 off

250.0 289.13 '0000.1001.1100.0100' 0x09C4 2500 0x00 off

>250.0 >289.13 '0010.0001.0011.0100' 0x2134 8500 0x42 on

Broken wire against RL '0010.0001.0011.0100' 0x2134 8500 0x42 on

1) )

Temperature values below 0 °C are represented in two’s complement binary form.

The measured value can exceed the range from decimal –600 to 2500 until the limitation
applies.

Resis-

tance

!

Numerical value 1)

binary hex. dec. hex. AI 1,2

Status-

byte

LED

Error

WAGO-I/O-SYSTEM 750
I/O Modules

18 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Process Image

2.1.2.7.2.2 Ni 1000

In the Ni 1000 setting 750-461/000-005, the temperature values of the sensors
are represented with a resolution of 1 digit per 0.1 °C within a word (16 bits).
Thus, 0 °C corresponds to the numeric value 0x0000 and 100 °C to 0x03E8
(dec. 1000).
Temperature values below 0 °C are represented in two’s complement binary
form.

The analog input modules transmits 16-bit measured values per channel as
well as 8 optional status bits to the coupler/controller.

750-461/000-005 (Ni 1000)

Tem-

perature

°C

<-60.0 < 691.60 '1000.0000.0000.0001' 0x8001 -32767 0x41 on

-60.0 691.60 '1111.1101.1010.1000' 0xFDA8 -600 0x00 off

-50.0 742.60 '1111.1110.0000.1100' 0xFE0C -500 0x00 off

0.0 1000.00 '0000.0000.0000.0000' 0x0000 0 0x00 off

50.0 1291.00 '0000.0001.1111.0100' 0x01F4 500 0x00 off

100.0 1617.96 '0000.0011.1110.1000' 0x03E8 1000 0x00 off

150.0 1986.20 '0000.0101.1101.1100' 0x05DC 1500 0x00 off

200.0 2406.40 '0000.0111.1101.0000' 0x07D0 2000 0x00 off

250.0 2891.31 '0000.1001.1100.0100' 0x09C4 2500 0x00 off

>250.0 >2891.31 '0010.0001.0011.0100' 0x2134 8500 0x42 on

Broken wire against RL '0010.0001.0011.0100' 0x2134 8500 0x42 on

1) )

Temperature values below 0 °C are represented in two’s complement binary form.

Resis-

tance

!

Numerical value 1)

binary hex. dec. hex. AI 1,2

Status-

byte

LED

Error

The measured value can exceed the range from decimal –600 to 2500 until the limitation
applies.

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 19
Process Image

2.1.2.7.3 I/O Modules for Resistance Measuring

Resistance measuring

750-461/000-002 Resistance measuring,

Measuring range: 10 Ω ... 1.2 kΩ

750-461/000-007 Resistance measuring,

Measuring range: 10 Ω ... 5.0 kΩ

The measured values are sent out directly when measuring the resistance.
Using the 750-461/000-002 module with measuring range from 10 Ω to

1.2 kΩ, the resolution is 1 digit per 0.1 Ω.
Using the 750-461/000-007 module with measuring range from 10 Ω to

5.0 kΩ, the resolution is 1 digit per 0.5 Ω.
Resistance measurement is only possible in 2-wire connection technology.

The analog input module transmits 16-bit measured values per channel as well
as 8 optional status bits to the coupler/controller.

750-461/000-002 (10 " ... 1,2 k")

Resistance

" binary hex. dec. hex. AI 1,2

0 '1110.1100.0000.0000' 0xEC00 -5120 0x00 off

10 '0000.0000.0110.0100' 0x0064 100 0x00 off
100 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500 '0001.0011.1000.1000' 0x1388 5000 0x00 off
750 '0001.1101.0100.1100' 0x1D4C 7500 0x00 off

1000 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1200 '0010.1110.1110.0000' 0x2EE0 12000 0x00 off

>ca.1200 '0010.0001.0011.0100' 0x2134 8500 0x42 on

Values marked with "ca." are not calibrated.

Numerical value

Status-

byte

LED

Error

750-461/000-007 (10 " ... 5 k")

Resistance

" binary 1) hex. dec. hex. AI 1,2

0 '1110.1100.0000.0000' 0xEC00 -5120 0x00 off

10 '0000.0000.0001.0100' 0x0014 20 0x00 off
100 '0000.0000.1100.1000' 0x00C8 200 0x00 off
200 '0000.0001.1001.0000' 0x0190 400 0x00 off
300 '0000.0010.0101.1000' 0x0258 600 0x00 off

1000 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
2000 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
3000 '0001.0111.0111.0000' 0x1770 6000 0x00 off
4000 '0001.1111.0100.0000' 0x1F40 8000 0x00 off
5000 '0010.0111.0001.0000' 0x2710 10000 0x00 off

>ca.5000 '0010.0111.0001.0000' 0x2710 10000 0x42 on

Values marked with "ca." are not calibrated.

Numerical value

Status-

byte

LED

Error

WAGO-I/O-SYSTEM 750
I/O Modules

20 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD] Adjustable 750-461/003-000 Variation

2.1.2.8 Adjustable 750-461/003-000 Variation

The operating mode of the 750-461/003-000 variation can be parameterized
using the WAGO-I/O-CHECK 2 start-up and diagnostic tool (Item No.: 759-

302).
The default setting is Pt 100. In this operating mode, the module has the same
behavior and process values as the 750-461 basic module.

The parameter dialog box of WAGO-I/O-CHECK 2 contains select boxes
that are used to set this module.

Select box Available settings

RTD Type Pt100 (-200 °C – 850 °C)* / Ni100 (-60 °C – 250 °C) /

Pt1000 (-200 °C – 850 °C) / Pt500 (-200 °C – 850 °C) /
Pt200 (-200 °C – 850 °C) / Ni1000 (-80 °C – 320 °C) /
Ni120 (-80 °C – 320 °C) / Ohm ( 10.0 Ω – 5000.0 Ω) /
Ohm (10.0 Ω – 1200.0 Ω)

2-wire Two-wire connection Connection

Timer

Filter
Constants

Protection

3-wire* Three-wire connection

OFF* State bits are not mapped State-Bits

ON State bits are mapped to the lower three bits of

the output value:

Bit 0:overrun. Bit is set if measuring value runs
out of range.

Bit 1:error. Bit is set if the module detects an
error in internal functions or a shortcut at the
input.

Bit 2: 0

OFF Watchdog timer not active Watchdog

ON* Watchdog timer active.

If no data are exchanged with the buscoupler for
100 ms, the green LEDs will turn off.

OFF* Two´s complement indication Amount Sign

ON Amount/Sign indication

12.5 Hz – 500 ms / 25 Hz – 250 ms* / 50 Hz – 125 ms /
60 Hz – 110 ms / 100 Hz – 65 ms

OFF The output value is not limited Overrange

ON* If the temperature exceeds 850°C, the status bits

are set and the output value is limited to 850°C

OFF* User scaling not active User Scaling

ON User scaling active

OFF WAGO scaling not active WAGO

Scaling

* default settings

ON* WAGO scaling active

WAGO-I/O-SYSTEM 750
I/O Modules

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 21
Adjustable 750-461/003-000 Variation

In WAGO-I/O-CHECK 2, the following input boxes allow you to set the
offset and gain values of the user and manufacturer scaling.

Input box ... Offset Gain

User Scaling ... 0x0000 0x0100

WAGO Scaling ... 0x0000 0x00A0

The following input boxes are available in WAGO-I/O-CHECK 2 for
hardware calibration.

Input box Settings

Offset 0xECF0

Gain 0x2700

2-wire-offset 0x0180

Further information
You can find detailed information on parameterizing this module in the
WAGO-I/O-CHECK 2 manual or on the Internet at www.wago.com.

WAGO-I/O-SYSTEM 750
I/O Modules

22 • 750-461/020-000 [2 AI NTC 20kOhm] View

2.1.3 750-461/020-000 [2 AI NTC 20kOhm]

2 Channel Analog Input Module for NTC 20kOhm RTDs,
2-wire connection

2.1.3.1 View

13 14

Fehler AI 1

+R 1

A

B

+R1 +R2

RL1 RL2

-R1 -R2

SS

C

D

Funktion AI 2Funktion AI 1
Fehler AI 2

Datenkontakte

+R 2

-R 2-R 1

2-Leiter

Schirm Schirm

750-461
/020-000

Fig. 2.1.3-1: 2-2-Channel Analog Input Module 750-461/020-000 g046103e

WAGO-I/O-SYSTEM 750
I/O Modules

750-461/020-000 [2 AI NTC 20kOhm] • 23 Description

2.1.3.2 Description

The analog input module 750-461/020-000 evaluates NTC 20kOhm resistance
Temperature Devices, RTDs.

The resistance value is converted to a temperature. A microprocessor within
the module is used for converting and linearizing the measured resistance
value into a numeric value proportional to the temperature of the selected
resistance sensor.

The analog input module is a 2-conductor device and has 2 input channels.
Two devices may be directly connected to the module.
The shield (screen) is directly connected to the DIN rail. A capacitive
connection is made automatically when snapped onto the DIN rail.

An optocoupler is used for electrical isolation between the bus and the field
side.

The operational readiness and trouble-free internal data bus communication of
the channels are indicated via a green function LED. A broken wire, short­circuit or overrange are indicated by a red error LED per channel.
After the error has been corrected, the module needs up to 4 seconds to output
a correct measured value.

Any configuration of the input modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.

Attention

This module has no power contacts. For field supply to downstream I/O
modules, a supply module will be needed.

The analog input module can be used with all couplers/controllers of the
WAGO-I/O-SYSTEM 750 (except for the economy types 750-320, -323, -324
and -327).

WAGO-I/O-SYSTEM 750
I/O Modules

24 • 750-461/020-000 [2 AI NTC 20kOhm]
Display Elements

2.1.3.3 Display Elements

LED Chan

A
gree
n

13 14

A

A
B

C

B

D

B

C

red

D

Fig. 2.1.3-2:
Display elements

g045202x

C
gree
n

D
red

2.1.3.4 Schematic Diagram

nel

1

2

State Function

off

on

No operational readiness or the internal data bus
communication is interrupted

Operational readiness and trouble-free internal data
bus communication

off Normal operation

on

off

on

Overrange/underflow of the admissible measuring
range, broken wire

No operational readiness or the internal data bus
communication is interrupted

Operational readiness and trouble-free internal data
bus communication

off Normal operation

on

Overrange/underflow of the admissible measuring
range, broken wire

+R1 +R2

2

3

-R1

Shield

(screen)

4

750-461
/020-000

6

7

-R2

8

+R

-R

Shield

(screen)

10nF

270pF

A

D

Logic

Error

Function

5

1

Fig. 2.1.3-3: 2-Channel Analog Input Module 750-461/020-000 g046104e

WAGO-I/O-SYSTEM 750
I/O Modules

750-461/020-000 [2 AI NTC 20kOhm] • 25 Technical Data

2.1.3.5 Technical Data

Module Specific Data

Number of inputs 2

Voltage supply via system voltage DC /DC

Current consumption

(internal) 65 mA

max.

Sensor types NTC 20kOhm

Sensor connection 2-wire

Temperature range -30 °C ... +130 °C

Resolution 0,1 °C

Conversion time 320 ms (per channel)

Response delay

(time from starting or connecting the sensor to
the first proper measured value)

max.

Measuring error

(The specified accurancys apply to a supply line
resistance of R

< 1 Ohm)

L

4 s

<± 1,0 K in the range of –30 °C ... +50 °C
(<± 0,5 K at 25 °C)
<± 2,0 K in the range of +50 °C ... +100 °C
<± 3,0 K in the range of +100 °C ... +130 °C

Temperature coefficient

<± 0,002 % /K of full scale value

Isolation 400 V (system/supply)

Measured current

0,05 mA at 25 °C

typ.

Bit width 2 x 16 bits data

2 x 8 bits Control/Status (option)

Dimensions (mm) W x H x L 12 x 64* x 100

* from upper edge of 35 DIN rail

Weight ca. 55 g

Standards and Regulations (cf. Chapter 2.2 of the Coupler/Controller Manual)

EMC-Immunity to interference (CE) acc. to EN 61000-6-2 (01)

EMC-Emission of interference (CE) acc. to EN 61000-6-3 (01)

Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)

(UL508)

CULUS

Conformity Marking

More Information
Detailed references to the approvals are listed in the document "Overview
Approvals WAGO-I/O-SYSTEM 750", which You can find on the CD ROM
ELECTRONICC Tools and Docs (Item-No.: 0888-0412-0001-0101) or in the
Internet under:

www.wago.com -> Service /Downloads /Documentation

/WAGO-I/O-SYSTEM 750/System Description/.

WAGO-I/O-SYSTEM 750
I/O Modules

26 • 750-461/020-000 [2 AI NTC 20kOhm]
Process Image

2.1.3.6 Process Image

Some fieldbus systems can process input channel status information by means
of a status byte.
This status byte can be displayed via the WAGO-I/O-CHECK 2 start-up and
diagnostic tool. However, processing via the coupler / controller is optional,
which means that accessing or parsing the status information depends on the
fieldbus system.

Attention

The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/-controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.

The analog input modules 750-461/020-000 transmit 16-bit measured values
per channel as well as 8 optional status bits to the coupler/controller.

To evaluate the NTC 20kOhm resistance sensors the measured values of the
resistance are converted and sent as temperature values.
All temperature values are represented in a standard numeric format. The
possible numerical range matches the defined temperature range of the sensors
from -30 °C to +130 °C.
In the NTC 20kOhm setting, the temperature values of the sensors are
represented with a resolution of 1 digit per 0.1 °C within a word (16 bits).
Thus, 0 °C corresponds to the numeric value 0x0000 and 100 °C to 0x03E8
(dec. 1000).
Temperature values below 0 °C are represented in two’s complement binary
form.

750-461/020-000

Tem-

perature

°C

<ca -30.0 >414.70 '0010.0001.0011.0100' 0x2134 8500 0x42 on

-30.0 414.70 '1111.1110.1101.0100' 0xFED4 -300 0x00 off

25.0 20.00 '0000.0000.1111.1010' 0x00FA 250 0x00 off

50.0 6.72 '0000.0001.1111.0100' 0x01F4 500 0x00 off

100.0 1.12 '0000.0011.1110.1000' 0x03E8 1000 0x00 off

130.0 0.46 '0000.0101.0001.0100' 0x0514 1300 0x00 off

>ca 130.0 < 0.46 '1000.0000.0000.0001' 0x8001 -32767 0x41 on

1)

Temperature values below 0 °C are represented in two’s complement binary form.

Resis-

tance

k"

0.0 70.20 '0000.0000.0000.0000' 0x0000 0 0x00 off

Numerical value 1)

binary hex. dec. Hex. AI 1, 2

Status-

byte

LED

Error

The measured value can exceed the range from decimal –300 to 1300 until the limitation
applies.

WAGO-I/O-SYSTEM 750
I/O Modules

750-461/020-000 [2 AI NTC 20kOhm] • 27
Process Image

WAGO-I/O-SYSTEM 750
I/O Modules

WAGO Kontakttechnik GmbH & Co. KG
Postfach 2880 • D-32385 Minden
Hansastraße 27 • D-32423 Minden
Phone: [phone] – 0
Fax: [phone] – 1 69
E-Mail: [e-mail]

Internet: http://www.wago.com