WAGO I/O SYSTEM 750 750-421 User manual

Fieldbus Independent
I/O Modules
2 DI DC 24V 3.0ms, High-Side
Switching, Diagn.
750-421
Manual
Version 1.0.2

ii • General
WAGO-I/O-SYSTEM 750
I/O Modules
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: [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 Digital Input Modules ..............................................................................7
2.1.1 750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.]............7
2.1.1.1 View................................................................................................7
2.1.1.2 Description......................................................................................7
2.1.1.3 Display Elements ............................................................................8
2.1.1.4 Schematic Diagram.........................................................................9
2.1.1.5 Technical Data ................................................................................9
2.1.1.6 Process image................................................................................10

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 Digital Input Module 750-421
2 DI DC 24V 3.0ms, High-Side Switching, Diagn. 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.

750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.] • 7
View
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Digital Input Modules
2.1.1 750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.]
2-Channel Digital Input Module DC 24V 3.0ms,
2- or 3-conductor connection; high-side switching, Diagn.
2.1.1.1 View
01 03
++
--
13 14
C
D
B
A
02 04
-+
DI 2
24V
0V
DI 1
U2
U1 V
V
750-421
Power jumper contacts
Data contacts
Status DI 2
Status DI 1
Error DI 2
Error DI 1
Fig. 2.1.1-1: 2-Channel Digital Input Module 750-421 g042100e
2.1.1.2 Description
The digital input module 750-421 receives control signals from digital field
devices (sensors, switches, etc.) and supplies a short-circuit proof voltage to
the sensors.
The module is a 2- to 3-conductor device and has two input channels. Two
sensors may be directly connected to the module.
Two 3-conductor sensors may be directly connected to UV1, 0 V and signal
input DI 1 or UV2, 0 V and signal input DI 2.
Each sensor can be supplied separately over the outputs UV1 and UV2.
Each input module has an RC noise rejection filter with a time constant of
3.0 ms.
The status of the input channels is indicated via status LEDs. In addition, a red
error-LED will show if there are any short circuit to ground in either channel.
In case of a short circuit, one error bit (bit 2 or bit 3) is assigned to every
channel in the input data process image. By means of this bit the supervisory
control can detect the error.

8 • 750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.]
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
After the error has been eliminated, the module will acknowledge
automatically.
With a delay of 100 ms (pulse extension), the error bit in the input process
image is reset and the error LED goes out after the acknowledgement.
An optocoupler is used for electrical isolation between the bus and the field
side.
Any configuration of the input modules is possible when designing the
fieldbus node. Grouping of module types is not necessary.
The field side supply voltage of 24V for the input module is derived from
adjacent I/O modules or from a supply module.The supply voltage for the
field side is made automatically through the individual I/O modules by means
of power jumper contacts.
Warning
The maximum current of the internal power jumper contacts is 10 A. When
configuring the system it is important not to exceed the maximum/sum
current. However, if such a case should occur, another supply module must
be added.
The digital input module 750-421 can be used with all couplers/controllers of
the WAGO-I/O-SYSTEM 750.
2.1.1.3 Display Elements
LED Channel Designation State Function
off Input DI 1: Signal voltage (0)A
green
Status
DI 1 on Input DI 1: Signal voltage (1)
off Normal operationB
red
1 Error
DI 1 on Short circuit (against ground)
off Input DI 2: Signal voltage (0)C
green
Status
DI 2 on Input DI 2: Signal voltage (1)
off Normal operation
13 14
C
D
B
A
D
C
B
A
Fig. 2.1.1-2: Display
elements g041802x
D
red
2 Error
DI 2 on Short circuit (against ground)

750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.] • 9
Schematic Diagram
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.4 Schematic Diagram
Error
Status
1
2
3
4
5
6
7
8
750-421
DI 1 DI 2
24V
0V
DI
0V
U1
VU2
V
24V
UV
10nF
270pF
10nF 10nF
Fig. 2.1.1-3: 2-Channel Digital Input Module 750-421 g042101e
2.1.1.5 Technical Data
Module-specific data
Number of inputs 2
Number of outputs 2 for transmitter supply
Current consumption (internal) < 12mA
Nominal voltage DC 24V (-25 % ... +30 %)
Signal voltage (0) DC –3V ... +5V
Signal voltage (1) DC 15V ... 30V
Input filter 3.0ms
Current supply typ. 4.3mA
Sensor supply Uv1,2 DC 24V
Nominal output current 0.5A
Short circuit current max. 1.5A, undulating because of thermal
overload protection
Isolation 500V (field/supply)
Internal bit width 4 Bit In
Dimensions (mm) W x H x L 12 x 64* x 100
* from upper edge of DIN 35 rail
Weight ca. 50 g

10 •750-421 [2 DI DC 24V 3.0ms, High-Side Switching, Diagn.]
Process image
WAGO-I/O-SYSTEM 750
I/O Modules
Standards and Regulations (cf. Chapter 2.2 of the Coupler / Controller Manual)
EMC-Immunity to interference (CE) acc. to EN 50082-2 (96)
EMV-Emission of interference (CE) acc. to EN 50081-1 (93)
EMV-Immunity to interference
(Ship building)
acc. to Germanischer Lloyd (01)
EMV-Emission of interference
(Ship building)
acc. to Germanischer Lloyd (01)
Approvals (cf. Chapter 2.2 of the Coupler / Controller Manual)
CULUS (UL508)
ABS (American Bureau of Shipping)
BV (Bureau Veritas) (applied for)
DNV (Det Norske Veritas) Cl. B
GL (Germanischer Lloyd) Cat. A, B, C, D
KR (Korean Register of Shipping)
LR (Lloyd's Register) (applied for) Env. 1, 2, 3, 4
NKK (Nippon Kaiji Kyokai)
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)
or in the internet under:
www.wago.com !Documentation !WAGO-I/O-SYSTEM 750 !
System Description
2.1.1.6 Process image
Input process data of the module 750-421
Input bit B3 B2 B1 B0
Meaning S21)
short circuit
channel 2
S11)
short circuit
channel 1
Signal status
DI 2 – channel 2
Signal status
DI 1 – channel 1
1) S1, S2: Diagnostic bit is set high at short circuit, with 100 ms pulse extension