WAGO 750-462 Series User manual

Fieldbus Independent
I/O Modules
2 AI Thermocouple
750-462 (/xxx-xxx)
Manual
Version 1.0.3

ii • General
WAGO-I/O-SYSTEM 750
I/O Modules
Copyright 2007 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.

Content • iii
WAGO-I/O-SYSTEM 750
I/O Modules
Content
1Important 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
2I/O Modules ................................................................................................. 7
2.1 Analog Input Modules.............................................................................. 7
2.1.1 750-462 (/xxx-xxx) [2 AI Thermocouple]........................................... 7
2.1.1.1 View................................................................................................ 7
2.1.1.2 Variations........................................................................................ 8
2.1.1.3 Description...................................................................................... 9
2.1.1.4 Display Elements .......................................................................... 10
2.1.1.5 Schematic Diagram....................................................................... 10
2.1.1.6 Technical Data .............................................................................. 11
2.1.1.7 Process Image ...............................................................................12
2.1.1.7.1 I/O Modules for Thermocouples.............................................. 12
2.1.1.7.1.1 Standard Data Format.......................................................... 13
2.1.1.7.2 I/O Modules for Voltage Measuring (mV) .............................. 17
2.1.1.8 Examples of Connection ............................................................... 18

4 • Important Comments
Legal Principles
WAGO-I/O-SYSTEM 750
I/O Modules
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 non-
conforming 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.

Important Comments • 5
Symbols
WAGO-I/O-SYSTEM 750
I/O Modules
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

6 • Important Comments
Safety Notes
WAGO-I/O-SYSTEM 750
I/O Modules
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.
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.
1.5 Scope
This manual describes the Analog Input Module 750-462 (/xxx-xxx)
2 AI Thermocouple 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.

750-462 (/xxx-xxx) [2 AI Thermocouple] • 7
View
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Analog Input Modules
2.1.1 750-462 (/xxx-xxx) [2 AI Thermocouple]
2-Channel Analog Input Module for Thermocouples
2.1.1.1 View
+TC +TC
13 14
C
D
B
A
-TC -TC
MM
SS
750-462
+TC 2
Data contacts
Function AI 2
-TC 2
Common
(ground)
Function AI 1
+TC 1
Error AI 2
Error AI 1
-TC 1
Common
(ground)
Shield
(screen)
Shield
(screen)
Fig. 2.1.1-1: 2- Channel Analog Input Module 750-462 g046200e

8 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Variations
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.2 Variations
Item-No. Designation Description
Thermocouples
750-462 2 AI Thermocouple/K/
-100 °C ... +1370 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type K, Diagn.
Measuring range: -100 °C ... +1370 °C
750-462/000-001 2 AI Thermocouple/S/
-50 °C ... +1700 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type S, Diagn.
Measuring range: -50 °C ... +1700 °C
750-462/000-002 2 AI Thermocouple/T/
-100 °C ... +400 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type T, Diagn.
Measuring range: -100 °C ... +400 °C
750-462/000-006 2 AI Thermocouple/J/
-100 °C ... +1200 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type J, Diagn.
Measuring range: -100 °C ... +1200 °C
750-462/000-007 2 AI Thermocouple/B/
600 °C ... +1800 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type B, Diagn.
Measuring range: 600 °C ... +1800 °C
750-462/000-008 2 AI Thermocouple/E/
-100 °C ... +1000 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type E, Diagn.
Measuring range: -100 °C ... +1000 °C
750-462/000-009 2 AI Thermocouple/N/
-100 °C ... +1300 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type N, Diagn.
Measuring range: -100 °C ... +1300 °C
750-462/000-010 2 AI Thermocouple/R/
0 °C ... +1700 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type R, Diagn.
Measuring range: 0 °C ... +1700 °C
750-462/000-011 2 AI Thermocouple/U/
-25 °C ... +600 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type U, Diagn.
Measuring range: -25 °C ... +600 °C
750-462/000-050 2 AI Thermocouple/K/
-100 °C ... +1370 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type K, Diagn.
Measuring range: -100 °C ... +1370 °C
Without cold junction compensation
750-462/000-061 2 AI Thermocouple/U/
-25 °C ... +600 °C/
Diagn.
2-Channel Analog Input Module,
Thermocouple Type U, Diagn.
Measuring range: -25 °C ... +600 °C
Without cold junction compensation
Voltage measuring
750-462/000-003 2 AI Voltage measuring
±120 mV/ Diagn.
2-Channel Analog Input Module,
Voltage measuring, Diagn.
Measuring range: ±120 mV

750-462 (/xxx-xxx) [2 AI Thermocouple] • 9
Description
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.3 Description
The 750-462 analog input module and its 750-462/xxx-xxx variations allow
thermocouples to be measured in the field. It can also be used to measure
voltages (mV).
Depending on the operating mode, the voltage value is converted to a
temperature or directly send out by the module. A microprocessor within the
module is used for converting and linearizing the measured voltage value into
a numeric value proportional to the temperature of the selected thermocouple.
The operating mode of the 750-462 basic module described in this manual is
for a type K thermocouple.
The analog module has two input channels allowing the direct connection of
two thermocouples. For example, two thermocouples can be connected either
to +TC1 and -TC1 or to +TC2 and -TC2.
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. Overrange or underflow
of the measuring range is indicated via a red error LED.
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 750-462 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).

10 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.4 Display Elements
LED Channel State Function
off No operational readiness or the internal data bus
communication is interrupted
A
green
on Operational readiness and trouble-free internal data
bus communication
off Normal operation
750-462,
750-462/000-001,
-002, -006, -007,
-008, -009 ,-010,
-011, -050 ,-061,
Overrange/underflow of the
admissible measuring range
B
red
1
on
750-462/000-003 -
off No operational readiness or the internal data bus
communication is interrupted
C
green
on Operational readiness and trouble-free internal data
bus communication
off Normal operation
750-462,
750-462/000-001,
-002, -006, -007,
-008, -009 ,-010,
-011, -050 ,-061,
Overrange/underflow of the
admissible measuring range
13 14
C
D
B
A
D
B
C
A
Fig. 2.1.1-2:
Display elements
g045202x
D
red
2
on
750-462/000-003 -
2.1.1.5 Schematic Diagram
Shield
(screen)
+TC1 +TC2
-TC1
+TC
270pF
-TC2 -TC
20nF
270pF
A
DLogicMUX
J Comp
Common
(ground)
Function
Error
Shield
(screen)
Common
(ground)
1
2
3
4
5
6
7
8
750-462
Fig. 2.1.1-3: 2-Channel Analog Input Module 750-462 g046201e

750-462 (/xxx-xxx) [2 AI Thermocouple] • 11
Technical Data
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.6 Technical Data
Module Specific Data
Number of inputs 2
Voltage supply via system voltage DC /DC
Current consumption max. (internal) 65 mA
Sensor types Type K; -100 °C ... +1370 °C (factory preset),
optionally orderable variants for
Type J, B, E, N, R, S, T, U
Cold junction compensation at each pair of terminal blocks
Resolution (over whole range) 0.1 °C
Conversion time 320 ms (both channels)
Measuring error 25°C
- Voltage input
- Cold junction compensation
<±6 K
<±2 K
<±4 K
Temperature coefficient <±0.2 K/ K
Internal resistance 1 MΩ
Isolation 500 V (System/Supply)
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)
CULUS (UL508)
ABS (American Bureau of Shipping)
BV (Bureau Veritas)
DNV (Det Norske Veritas) Cl. B
GL (Germanischer Lloyd) Cat. A, B, C, D
LR (Lloyd's Register) Env. 1, 2, 3, 4
RINA (Registro Italiano Navale)
CULUS (UL1604) Class I Div2 ABCD T4A
KEMA II 3 G EEx nA II T4
Conformity Marking

12 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
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
2.1.1.7 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 starting tool WAGO-I/O-CHECK 2.
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.
2.1.1.7.1 I/O Modules for Thermocouples
Thermocouples
750-462 Thermocouple Type K/ -100 °C ... +1370 °C/ Diagn.
750-462/000-001 Thermocouple Type S/ -50 °C ... +1700 °C/ Diagn.
750-462/000-002 Thermocouple Type T/ -100 °C ... +400 °C/ Diagn.
750-462/000-006 Thermocouple Type J/ -100 °C ... +1200 °C/ Diagn.
750-462/000-007 Thermocouple Type B/ 600 °C ... +1800 °C/ Diagn.
750-462/000-008 Thermocouple Type E/ -100 °C ... +1000 °C/ Diagn.
750-462/000-009 Thermocouple Type N/ -100 °C ... +1300 °C/ Diagn.
750-462/000-010 Thermocouple Type R/ 0 °C ... +1700 °C/ Diagn.
750-462/000-011 Thermocouple Type U/ -25 °C ... +600 °C/ Diagn.
750-462/000-050 Thermocouple Type K/ -100 °C ... +1370 °C/ Diagn./
Without cold junction compensation
750-462/000-061 Thermocouple Type U/ -25 °C ... +600 °C/ Diagn./
Without cold junction compensation

750-462 (/xxx-xxx) [2 AI Thermocouple] • 13
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.7.1.1Standard Data Format
For the 750-462 module and its variations with standard data format, 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).
750-462, Type K
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x41 on
-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
1000.0 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1200.0 '0010.1110.1110.0000' 0x2EE0 12000 0x00 off
1300.0 '0011.0010.1100.1000' 0x32C8 13000 0x00 off
1370.0 '0011.0101.1000.0100' 0x3584 13700 0x00 off
>ca.1370.0 '0011.0101.1000.0100' >0x3584 >13700 0x42 on
1) Temperature values below 0 °C are represented in two’s complement binary form.

14 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
750-462/000-001, Type S
Temperature Numerical value Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-50.0 '1111.1110.0000.1100' 0xFE0C -500 0x41 on
-50.0 '1111.1110.0000.1100' 0xFE0C -500 0x41 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
1000.0 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1500.0 '0011.1010.1001.1000' 0x3A98 15000 0x00 off
1700.0 '0100.0010.0110.1000' 0x4268 17000 0x00 off
>1700.0 '0100.0010.0110.1000' >0x4268 >17000 0x42 on
750-462/000-002, Type T
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<ca.-100.1 '1111.1100.0001.0111' 0xFC17 -1001 0x41 on
-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off
-50.0 '1111.1110.0000.1100' 0xFE0C -500 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
50.0 '0000.0001.1111.0100' 0x01F4 500 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
150.0 '0000.0101.1101.1100' 0x05DC 1500 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
250.0 '0000.1001.1100.0100' 0x09C4 2500 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
350.0 '0000.1101.1010.1100' 0x0DAC 3500 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x42 on
>400.0 '0000.1111.1010.0000' >0x0FA0 >4000 0x42 on
1) Temperature values below 0 °C are represented in two’s complement binary form.

750-462 (/xxx-xxx) [2 AI Thermocouple] • 15
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
750-462/000-006, Type J
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x41 on
-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
1000.0 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1200.0 '0010.1110.1110.0000' 0x2EE0 12000 0x00 off
>1200.0 '0010.1110.1110.0000' >0x2EE0 >12000 0x42 on
1) Temperature values below 0 °C are represented in two’s complement binary form.
750-462/000-007, Type B
Temperature Numerical value Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<600.0 '0001.0111.0111.0000' 0x1770 6000 0x41 on
600.0 '0001.0111.0111.0000' 0x1770 6000 0x00 off
700.0 '0001.1011.0101.1000' 0x1B58 7000 0x00 off
800.0 '0001.1111.0100.0000' 0x1F40 8000 0x00 off
900.0 '0010.0011.0010.1000' 0x2328 9000 0x00 off
1000.0 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1500.0 '0011.1010.1001.1000' 0x3A98 15000 0x00 off
1600.0 '0011.1110.1000.0000' 0x3E80 16000 0x00 off
1700.0 '0100.0010.0110.1000' 0x4268 17000 0x00 off
1800.0 '0100.0110.0101.0000' 0x4650 18000 0x00 off
>1800.0 '0100.0110.0101.0000' >0x4650 >18000 0x42 on

16 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
750-462/000-008, Type E
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x41 on
-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
600.0 '0001.0111.0111.0000' 0x1770 6000 0x00 off
700.0 '0001.1011.0101.1000' 0x1B58 7000 0x00 off
900.0 '0010.0011.0010.1000' 0x2328 9000 0x00 off
999.0 '0010.0111.0000.0110' 0x2706 9990 0x00 off
>999.0 '0010.0111.0000.0110' >0x2706 >9990 0x42 on
1) Temperature values below 0 °C are represented in two’s complement binary form.
750-462/000-011, Type U and 750-462/000-061, Type U without K Cold junction
compensation
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-25.0 '1111.1111.0000.0110' 0xFF06 -250 0x41 on
-25.0 '1111.1111.0000.0110' 0xFF06 -250 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
50.0 '0000.0001.1111.0100' 0x01F4 500 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
600.0 '0001.0111.0111.0000' 0x1770 6000 0x00 off
>600.0 '0001.0111.0111.0000' >0x1770 >6000 0x00 off
1) Temperature values below 0 °C are represented in two’s complement binary form.

750-462 (/xxx-xxx) [2 AI Thermocouple] • 17
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
750-462/000-050, Type K without K Cold junction compensation
Temperature Numerical value 1) Status-
byte
LED
Error
°C binary hex. dec. hex. AI 1, 2
<-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x41 on
-100.0 '1111.1100.0001.1000' 0xFC18 -1000 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
100.0 '0000.0011.1110.1000' 0x03E8 1000 0x00 off
200.0 '0000.0111.1101.0000' 0x07D0 2000 0x00 off
300.0 '0000.1011.1011.1000' 0x0BB8 3000 0x00 off
400.0 '0000.1111.1010.0000' 0x0FA0 4000 0x00 off
500.0 '0001.0011.1000.1000' 0x1388 5000 0x00 off
1000.0 '0010.0111.0001.0000' 0x2710 10000 0x00 off
1200.0 '0010.1110.1110.0000' 0x2EE0 12000 0x00 off
1300.0 '0010.1110.1110.0000' 0x2EE0 13000 0x00 off
1370.0 '0011.0101.1000.0100' 0x3584 13700 0x00 off
>1370.0 '0011.0101.1000.0100' >0x3584 >13700 0x42 on
1) Temperature values below 0 °C are represented in two’s complement binary form.
2.1.1.7.2 I/O Modules for Voltage Measuring (mV)
Voltage measuring (mV)
750-462/000-003 Voltage measuring –120 ... 120 mV
When measuring the voltage, the input range from -120 mV to +120 mV is
mapped to a range of values between -18750 and +18750 with a resolution of
6.4 µV per digit.
Voltage values below 0 mV are represented in two’s complement binary form.
750-462/000-003, mV-Measuring ±120 mV
Voltage Numerical value 1) Status-
byte
LED
Error
mV binary hex. dec. hex. AI 1, 2
<-120.0 '1011.0110.1100.0010' 0xB6C2 -18750 0x00 off
-120.0 '1011.0110.1100.0010' 0xB6C2 -18750 0x00 off
-90.0 '1100.1001.0001.0010' 0xC912 -14062 0x00 off
-60.0 '1101.1011.0110.0001' 0xDB61 -9375 0x00 off
-30.0 '1110.1101.1011.0001' 0xEDB1 -4687 0x00 off
0.0 '0000.0000.0000.0000' 0x0000 0 0x00 off
30.0 '0001.0010.0101.0000' 0x1250 4688 0x00 off
60.0 '0010.0100.1001.1111' 0x249F 9375 0x00 off
90.0 '0011.0110.1110.1111' 0x36EF 14063 0x00 off
120.0 '0100.1001.0011.1110' 0x493E 18750 0x00 off
>120.0 '0100.1001.0011.1110' 0x493E 18750 0x00 off
1) Voltage values below 0 mV are represented in two’s complement binary form.

18 • 750-462 (/xxx-xxx) [2 AI Thermocouple]
Examples of Connection
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.8 Examples of Connection
When connecting the thermocouples, good grounding practices must be
guaranteed between the machine and the sensors that are connected to the
module. Insufficient grounding can lead to common mode voltages, which
may distort the measuring result.
Due to the differential inputs, grounded and ungrounded thermocouples can be
connected in the following ways:
With grounded thermocouples, the common ground (M) can be connected to
the screen (S) using an external bridge so that common mode interferences can
be eliminated (see figure below).
+TC +TC
-TC -TC
MM
SS
+TC
-TC
Fig. 2.1.1-4: Connection of grounded thermocouple g046204x
With ungrounded thermocouples, the common ground (M) can be connected
both to the TC input and to the screen (S), if required, using an external bridge
so that common mode interferences can be eliminated (see figure below).
+TC +TC
-TC -TC
MM
SS
+TC
-TC
Fig. 2.1.1-5: Connection of ungrounded thermocouple g046205x

750-462 (/xxx-xxx) [2 AI Thermocouple] • 19
Examples of Connection
WAGO-I/O-SYSTEM 750
I/O Modules

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Fax: [phone] – 1 69
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