WAGO 750 Series User manual

Fieldbus Independent
I/O Modules
Analog Input Modules for RTD's
750-461 (/xxx-xxx)
Manual
Version 1.2.1

ii •General
WAGO-I/O-SYSTEM 750
I/O Modules
Copyright 2008 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: [email protected]
Web: http://www.wago.com
Technical Support
Phone: [phone] – 5 55
Fax: [phone] – 85 55
E-Mail: [email protected]
Every conceivable measure has been taken to ensure the correctness and com-
pleteness of this documentation. However, as errors can never be fully ex-
cluded, we would appreciate any information or ideas at any time.
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 trademark or patent protected.

Important Notes •3
Legal Bases
WAGO-I/O-SYSTEM 750
I/O Modules
Content
1Important Notes .......................................................................................... 5
1.1 Legal Bases...............................................................................................5
1.1.1 Copyright.............................................................................................5
1.1.2 Personnel Qualifications......................................................................5
1.1.3 Use of the 750 Series in Compliance with Underlying Provisions .....6
1.1.4 Technical Condition of Specified Devices ..........................................6
1.2 Standards and Guidelines for Operating the 750 Series...........................7
1.3 Symbols....................................................................................................8
1.4 Safety Information....................................................................................9
1.5 Font Conventions ................................................................................... 10
1.6 Number Notation....................................................................................10
1.7 Scope ......................................................................................................10
2I/O Modules ............................................................................................... 12
2.1 Analog Input Modules............................................................................ 12
2.1.1 Overview Analog Input Modules for RTD's 750-461 (/xxx-xxx)..... 12
2.1.2 750-461, (/xxx-xxx) [2 AI Pt100/ RTD] ...........................................13
2.1.2.1 Variations...................................................................................... 13
2.1.2.2 View..............................................................................................14
2.1.2.3 Description.................................................................................... 14
2.1.2.4 Display Elements ..........................................................................15
2.1.2.5 Schematic Diagram....................................................................... 16
2.1.2.6 Technical Data .............................................................................. 17
2.1.2.7 Process Image ...............................................................................19
2.1.2.7.1 I/O Modules for Pt Resistance Sensors....................................19
2.1.2.7.1.1 Pt 100................................................................................... 21
2.1.2.7.1.2 Pt 1000................................................................................. 21
2.1.2.7.1.3 Pt 100 with Status Information for S5-FB250 in Data Word22
2.1.2.7.2 I/O Modules for Ni Resistance Sensors ...................................23
2.1.2.7.2.1 Ni 100 .................................................................................. 23
2.1.2.7.2.2 Ni 1000 TK6180..................................................................24
2.1.2.7.3 I/O Modules for Resistance Measuring....................................25
2.1.2.8 Adjustable 750-461/003-000 Variation ........................................26
2.1.3 750-461/020-000 [2 AI NTC 20kOhm].............................................28
2.1.3.1 View..............................................................................................28
2.1.3.2 Description.................................................................................... 29
2.1.3.3 Display Elements ..........................................................................30
2.1.3.4 Schematic Diagram....................................................................... 30
2.1.3.5 Technical Data .............................................................................. 31
2.1.3.6 Process Image ...............................................................................32
3Use in Hazardous Environments .............................................................33
3.1 Identification ..........................................................................................34
3.1.1 For Europe according to CENELEC and IEC...................................34
3.1.2 For America according to NEC 500.................................................. 37
3.2 Installation Regulations..........................................................................38

4 •Content
Legal Bases
WAGO-I/O-SYSTEM 750
I/O Modules
3.2.1 Special Conditions for Safe Operation of the ATEX and IEC Ex (acc.
DEMKO 08 ATEX 142851X and IECEx PTB 07.0064)..................39
3.2.2 Special conditions for safe use (ATEX Certificate TÜV 07 ATEX
554086 X) ..........................................................................................40
3.2.3 Special conditions for safe use (IEC-Ex Certificate TUN 09.0001 X)41
3.2.4 ANSI/ISA 12.12.01 ........................................................................... 42

Important Notes •5
Legal Bases
WAGO-I/O-SYSTEM 750
I/O Modules
1 Important Notes
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.
1.1 Legal Bases
1.1.1 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.
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.
1.1.2 Personnel Qualifications
The use of the product described in this Manual requires special personnel
qualifications, as shown in the following table:
Activity Electrical specialist Instructed
personnel*)
Specialists**) having
qualifications in PLC
programming
Assembly X X
Commissioning X X
Programming X
Maintenance X X
Troubleshooting X
Disassembly X X
*) Instructed persons have been trained by qualified personnel or electrical specialists.
**) A specialist is a person, who – thanks to technical training – has the qualification, know-
ledge and expertise to meet the required specifications of this work and to identify any po-
tential hazardous situation in the above listed fields of activity.

6 •Content
Legal Bases
WAGO-I/O-SYSTEM 750
I/O Modules
All responsible persons have to familiarize themselves with the underlying
legal standards to be applied. WAGO Kontakttechnik GmbH & Co. KG does
not assume any liability whatsoever resulting from improper handling and
damage incurred to both WAGO´s own and third-party products by
disregarding detailed information in this Manual.
1.1.3 Use of the 750 Series in Compliance with Underlying
Provisions
Couplers, 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 the actuators or higher-level control systems. Using programmable
controllers, the signals can also be (pre-)processed.
The components 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 components in wet
and dusty environments is prohibited.
1.1.4 Technical Condition of Specified Devices
The components to be supplied Ex Works, are equipped with hardware and
software configurations, which meet the individual application requirements.
Changes in hardware, software and firmware are permitted exclusively within
the framework of the various alternatives that are documented in the specific
manuals. 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 components.
Please send your request for modified and new hardware or software
configurations directly to WAGO Kontakttechnik GmbH & Co. KG.

Important Notes •7
Standards and Guidelines for Operating the 750 Series
WAGO-I/O-SYSTEM 750
I/O Modules
1.2 Standards and Guidelines for Operating the 750 Series
Please adhere to the standards and guidelines required for the use of your
system:
The data and power lines shall be connected and installed in compliance
with the standards required to avoid failures on your system and to
substantially minimize any imminently hazardous situations resulting in
personal injury.
For assembly, start-up, maintenance and troubleshooting, adhere to the
specific accident prevention provisions which apply to your system (e.g.
BGV A 3, "Electrical Installations and Equipment").
Emergency stop functions and equipment shall not be made ineffective.
See relevant standards (e.g. DIN EN 418).
The equipment of your system shall be conform to EMC guidelines so that
any electromagnetic interferences will be eliminated.
Operating 750 Series components in home applications without further
measures is permitted only if they meet the emission limits (emissions of
interference) in compliance with EN 61000-6-3. You will find the detailed
information in section "WAGO-I/O-SYSTEM 750" "System
Description" "Technical Data".
Please observe the safety precautions against electrostatic discharge in
accordance with DIN EN 61340-5-1/-3. When handling the modules,
please ensure that environmental factors (persons, working place and
packaging) are well grounded.
The valid standards and guidelines applicable for the installation of switch
cabinets shall be adhered to.

8 •Content
Symbols
WAGO-I/O-SYSTEM 750
I/O Modules
1.3 Symbols
Danger
Always observe this information to protect persons from injury.
Warning
Always observe this information to prevent damage to the device.
Attention
Marginal conditions that must always be observed to ensure smooth and
efficient operation.
ESD (Electrostatic Discharge)
Warning of damage to the components through electrostatic discharge.
Observe the precautionary measure for handling components at risk of
electrostatic discharge.
Note
Make important notes that are to be complied with so that a trouble-free and
efficient device operation can be guaranteed.
Additional Information
References to additional literature, manuals, data sheets and internet pages.

Important Notes •9
Safety Information
WAGO-I/O-SYSTEM 750
I/O Modules
1.4 Safety Information
When connecting the device to your installation and during operation, the
following safety notes must be observed:
Danger
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 is only permitted via a key or tool to authorized qualified personnel.
Danger
All power sources to the device must always be switched off before carrying
out any installation, repair or maintenance work.
Warning
Replace defective or damaged device/module (e.g. in the event of deformed
contacts), as the functionality of field bus station in question can no longer be
ensured on a long-term basis.
Warning
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 the
components must be installed in an enclosure that is resistant against the
above mentioned materials. Clean tools and materials are generally required
to operate the device/module.
Warning
Soiled contacts must be cleaned using oil-free compressed air or with ethyl
alcohol and leather cloths.
Warning
Do not use contact sprays, which could possibly impair the functioning of the
contact area.
Warning
Avoid reverse polarity of data and power lines, as this may damage the
devices.
ESD (Electrostatic Discharge)
The devices are equipped with electronic components that may be destroyed
by electrostatic discharge when touched.

10 •Content
Font Conventions
WAGO-I/O-SYSTEM 750
I/O Modules
Warning
For components with ETHERNET/RJ-45 connectors:
Only for use in LAN, not for connection to telecommunication circuits.
1.5 Font Conventions
italic Names of paths and data files are marked in italic-type.
e.g.: C:\Programs\WAGO-IO-CHECK
italic Menu items are marked in italic-type, bold letters.
e.g.: Save
\ A backslash between two names characterizes the selection of a
menu point from a menu.
e.g.: File \ New
END Pushbuttons are marked as bold with small capitals
e.g.: ENTER
< > Keys are marked bold within angle brackets
e.g.: <F5>
Courier The print font for program codes is Courier.
e.g.: END_VAR
1.6 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 (.)
1.7 Scope
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.

Important Notes •11
Scope
WAGO-I/O-SYSTEM 750
I/O Modules
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.

12 • Overview Analog Input Modules for RTD's 750-461 (/xxx-xxx)
Variations
WAGO-I/O-SYSTEM 750
I/O Modules
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 750-461 750-461/
000-002
750-461/
000-003
750-461/
000-004
750-461/
000-005
750-461/
000-006
Function PT100/
RTD
Resistance
Measuring
10R-1k2
PT1000/
RTD
Ni 100/
RTD
Ni 1000/
RTD,
TK6180
PT100/
RTD/
high
precision
Channels 2 2 2 2 2 2
Measuring
range
-200 °C ...
+850 °C
10 ...
1,2 k
-200 °C ...
+850 °C
-60 °C ...
+250 °C
-60 °C ...
+250 °C
-200 °C ...
+850 °C
Counter depth 2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
I/O Module 750-461/
000-007
750-461/
000-009
750-461/
000-200
750-461/
003-000
750-461/
020-000
750-461/
025-006
Function Resistance
Measuring
10R-5k0
Ni 1000/
RTD,
TK5000
PT100/
RTD/
with
status
informatio
ns
PT100/
RTD/
adjustable
NTC
20kOhm
PT100/
RTD/
high
precision
Channels 2 2 2 2 2 2
Measuring
range
10 ...
5,0 k
-30 °C ...
+122 °C
-200 °C ...
+850 °C,
-200 °C ...
+850 °C
-30 °C ...
+130 °C
-200 °C ...
+850 °C
Counter depth 2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16
bits Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)
2 x 16 bits
Data
2 x 8 bits
Control/
Status
(option)

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 13
Variations
WAGO-I/O-SYSTEM 750
I/O Modules
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 Variations
Item-No. Designation Description
Pt resistance sensors
750-461 2 AI PT100/RTD 2-Channel Analog Input Module, Pt 100
Measuring range: -200 °C ... +850 °C
750-461/000-003 2 AI PT1000/RTD 2-Channel Analog Input Module, Pt 1000
Measuring range: -200 °C ... +850 °C
750-461/000-006 2 AI PT100/RTD/
high precision
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
750-461/025-000 2 AI PT100/RTD/T 2-Channel Analog Input Module, Pt 100
Measuring range: -200 °C ... +850 °C,
extended Temperature Range
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,
TK6180
750-461/000-009 2 AI Ni 1000/RTD/
TK5000
2-Channel Analog Input Module, Ni 1000
Measuring range: -30 °C ... +122 °C,
TK5000
Resistance measuring
750-461/000-002 2 AI Resistance
Measuring, 10R-1k2
2-Channel Analog Input Module,
Resistance measuring,
Measuring range: 10 ... 1,2 k
750-461/000-007 2 AI Resistance
Measuring, 10R-5k0
2-Channel Analog Input Module,
Resistance measuring,
Measuring range: 10 ... 5,0 k
Operating mode configurable with WAGO-I/O-CHECK
750-461/003-000 2 AI PT100/RTD/
Adjustable
2-Channel Analog Input Module,
Adjustable; Factory preset: Pt 100
Measuring range: -200 °C ... +850 °C
750-461/020-000 2AI NTC 20kOhm 2-Channel Input Module for RTDs,
NTC 20kOhm

14 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
View
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.2.2 View
+R1 +R2
13 14
C
D
B
A
RL1 RL2
SS
-R1 -R2
750-461
+R 2
Data contacts
Function AI 2
RL 2
Function AI 1
+R 1
Error AI 2
Error AI 1
RL 1
Shield
(screen)
Shield
(screen)
-R 2
-R 1
2-conductor 3-conductor
Fig. 2.1.2-1: View g046100e
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.
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, short-

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 15
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
circuit 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, 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
off No operational readiness or the internal data bus
communication is interrupted
A
green Operational readiness and trouble-free internal data bus
communication
off Normal operation
750-461,
750-461/000-003,
-004, -005, -006
Overrange/underflow of the
admissible measuring range,
broken wire
750-461/000-200 Overrange of the admissible
measuring range, broken wire
750-461/000-002 Overrange/underflow of the
admissible measuring range
B
1
red
750-461/000-007 Overrange of the admissible
measuring range
off No operational readiness or the internal data bus
communication is interrupted
C
green Operational readiness and trouble-free internal data bus
communication
off Normal operation
750-461,
750-461/000-003,
-004, -005, -006
Overrange/underflow of the
admissible measuring range,
broken wire
750-461/000-200 Overrange of the admissible
measuring range, broken wire
750-461/000-002 Overrange/underflow of the
admissible measuring range
13 14
C
D
B
A
B
A
Fig. 2.1.2-2:
Display Elements
g045202x
D
2
red
750-461/000-007 Overrange of the admissible
measuring range

16 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Schematic Diagram
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.2.5 Schematic Diagram
Shield
(screen)
+R1 +R2
RL1
-R1
+R
270pF
RL2
-R2
RL
10nF
270pF
-R
MUX A
DLogic
Function
Error
Shield
(screen)
1
2
3
4
5
6
7
8
750-461
Fig. 2.1.2-3: Schematic Diagram g046101e

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 17
Technical Data
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.2.6 Technical Data
Module Specific Data
Number of inputs 2
Voltage supply via system voltage DC /DC
Current consumption max. (internal) 80 mA
Sensor types
(the free configurable variation supports all
listed sensor types)
Pt 100 (factory preset),
optionally orderable variants for
Pt 1000,
Ni 100, Ni 120, Ni 1000 TK6180,
Ni 1000 TK5000, resistance measuring.
Sensor connection 3-wire (factory preset) or 2-wire
Temperature range -200 °C ... +850 °C (Pt)
-60 °C ... +250 °C (Ni100, Ni100TK6180)
-30 °C ... +122 °C (Ni100TK5000)
Resolution 0,1 °C
Conversion time 320 ms (per channel)
960 ms (per channel for 750-461/000-006)
Response delaymax.
(time from starting or connecting the sensor to
the first proper measured value)
4 s
12 s (for 750-461/000-006)
Measuring error 25°C <0.2 % of full scale value
Temperature coefficient <0.01 % /K of full scale value
<0,001 % /K of full scale value (for
750-461/000-006)
Isolation 500 V (System/Supply)
Measured current typ. 0.5 mA
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: 2005
EMC-Emission of interference (CE) acc. to EN 61000-6-4: 2007
EMC-Immunity to interference
(Ship building)
acc. to Germanischer Lloyd (2003)
EMC-Emission of interference
(Ship building)
acc. to Germanischer Lloyd (2003)

18 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Technical Data
WAGO-I/O-SYSTEM 750
I/O Modules
Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)
Conformity Marking
CULUS (UL508)
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
NKK (Nippon Kaiji Kyokai)
PRS (Polski Rejestr Statków)
RINA (Registro Italiano Navale)
The following Ex approvals have been granted to the basic version of 750-461
I/O modules:
TÜV (07 ATEX 554086 X)
I M2 Ex d I
II 3 G Ex nA IIC T4
II 3 D Ex tD A22 IP6X T135°C
Permissible operation temperature: 0 °C ≤TA ≤+60 °C
TÜV (TUN 09.0001X)
Ex d I
Ex nA IIC T4
Ex tD A22 IP6X T135°C
Permissible operation temperature: 0 °C ≤TA ≤+60 °C
CULUS (ANSI/ISA 12.12.01) Class I Div2 ABCD T4

750-461, (/xxx-xxx) [2 AI Pt100/ RTD] • 19
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
The following Ex approvals have been granted to the variation 750-461/000-
xxx and the variation 750-461/003-000:
DEMKO (08 ATEX 142851X) I M2/ II 3 GD Ex nA IIC T4
CULUS (ANSI/ISA 12.12.01) Class I Div2 ABCD T4
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: http://www.wago.com Documentation 
WAGO-I/O-SYSTEM 750 System Description
2.1.2.7 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.
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

20 • 750-461, (/xxx-xxx) [2 AI Pt100/ RTD]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
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 750-461/000-
200 (Pt 100) module.