WAGO 750-654 User manual

Fieldbus Independent
I/O Modules
Data Exchange Module
750-654
Manual
Version 1.0.1

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 Special Modules ....................................................................................... 7
2.1.1 750-654 [Data Exchange Module] ...................................................... 7
2.1.1.1 View................................................................................................ 7
2.1.1.2 Variations........................................................................................ 7
2.1.1.3 Description...................................................................................... 7
2.1.1.4 Display Elements ............................................................................ 8
2.1.1.5 Schematic Diagram......................................................................... 9
2.1.1.6 Technical Data .............................................................................. 10
2.1.1.7 Functional description................................................................... 11
2.1.1.8 Process Image ...............................................................................12
2.1.1.9 Data Transfer ................................................................................ 13

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 Special Module 750-654 Data Exchange Module 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.

750-654 [Data Exchange Module] •7
View
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Special Modules
2.1.1 750-654 [Data Exchange Module]
2.1.1.1 View
TxD
RxD
MM
SS
13 14
C
D
B
A
750-654
TxD
RxD
__
__
TxD
Data contacts
RxD
RxD
Common
(ground)
Shield
(screen)
TxD
Function
TxD
Shield
(screen)
RxD
Common
(ground)
___
___
Fig. 2.1.1-1: Data Exchange Module 750-654 g065400e
2.1.1.2 Variations
Item-No. Designation Description
750-654 Data Exchange Module Baud rate: 62500 baud;
Parity: none; data bits: 8, stop bits: 1
750-654/000-001 Data Exchange Module
125 kBaud
Baud rate: 125000 baud;
Parity: none; data bits: 8, stop bits: 1
2.1.1.3 Description
The data exchange module allows the exchange of data between different
fieldbus systems via multiplexing of a serial connection.
Two modules are a communication pair that is connected by means of two
twisted wire pairs. Each module is part of a fieldbus node.
The wiring to the communication partner is made by the connections TxD,
/TxD, RxD, /RxD and ground.
The screen connection is connected directly to the mounting rail.
The data exchange is done in full duplex operation, independent of the
fieldbus system used. The data of the output process image of the fieldbus
coupler/-controller is transmitted to the communication partner. This module
then transmits the data to the input process image of its fieldbus coupler/-
controller and vice versa.

8 •750-654 [Data Exchange Module]
Display Elements
WAGO-I/O-SYSTEM 750
I/O Modules
Depending on the fieldbus coupler/-controller used, the data exchange module
allows for the exchange of 4 (5) bytes, one status byte and one control byte
between the fieldbus systems via multiplexing of a serial connection. The
delay which is caused by the multiplexor is ca. 5 ms with the module 750-654
and 2.5 ms with the module 750-654/000-001.
Three green LEDs signal readiness for operation and troublefree internal bus
communication as well as the condition of the signal transmission.
The interface guarantees high fail-safe characteristic by differential
transmission and electrically isolated signals.
Any configuration of the specialty 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 data exchange module 750-654 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).
This description is valid for hardware and software version XXXX3A05.....
The version is specified in the manufacturing number, which is part of the
lateral marking of the module.
2.1.1.4 Display Elements
LED Channel State Function
off No operational readiness or the
internal data bus communication is
interrupted
A
green
Function
on Operational readiness and trouble-
free internal data bus
communication
off signal transfer TxDB
green
TxD
on no signal transfer TxD
off signal transfer RxDD
green
RxD
on no signal transfer RxD
Fig. 2.1.1-2: Display
Elements g065002x
1) The pulses are so short that the off status cannot or only hardly be
recognized with the eyes.

750-654 [Data Exchange Module] •9
Schematic Diagram
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.5 Schematic Diagram
Shield
(screen)
TxD TxD
RxD RxD
TxD
TxD
TxD
RxD
RxD
RxD
Function
Logic
RS 485
Shield
(screen)
0V 0V
___
___
___
___
1
2
3
4
5
6
7
8
750-654
Fig. 2.1.1-3: Data Exchange Module 750-654 g065401e

10 •750-654 [Data Exchange Module]
Technical Data
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.6 Technical Data
Module Specific Data
Transmission channel 1 TxD / 1 RxD, full duplex
Baud rate 62500 baud (8 N 1) (750-654)
125000 baud (8 N 1) (750-654/000-001)
Bit transfer over 2 x twisted pair with differential signals
Line impedance 120 Ω
Transmission length max. 100 m twisted pair
Current consumption (internal) 65 mA
Voltage supply via system voltage DC /DC
Isolation 500 V (System/Supply)
Bit width 1 x 40 bits data
1 x 8 bits control/status
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)
Approvals (cf. Chapter 2.2 of the Coupler/Controller Manual)
CULUS (UL508)
ABS (American Bureau of Shipping)
BV (Bureau Veritas) (applied for)
GL (Germanischer Lloyd) (applied for) 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

750-654 [Data Exchange Module] •11
Functional description
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.7 Functional description
The integrated watchdog function switches all outputs to zero if there is no
valid information for more than 200 ms via the multiplex connection.
The 128 bytes input buffer provides for high rates of data transmission. When
using slower speeds, you can collect the received data with lower priority
without loosing data.
The 16 byte output buffer provides for faster transmission of larger data
strings.
The data exchange module is connected peer-to-peer. For the wiring of the
serial multiplex connection the RxD and TxD cables are crossed. The
following illustrations show the peer-to-peer connection and the internal
structure of the data exchange module.
TxD TxD
RxD RxD
MM MM
SS SS
13 13 14 14
CC
DD
BB
AA
750-654 750-654
TxD TxD
RxD RxD
__ __
__ __
Fig. 2.1.1-4: Point-to-Point connection g065402d
RxD+
RxD-
76543210
76543210
76543210
76543210
76543210
76543210
76543210
76543210
76543210
76543210
TxD+
TxD-
M
S
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
EN
+5V
10k
10k
Internal
Output byte 0
Output byte 1
Output byte 2
Output byte 3
Output byte 4
Input byte 0
Input byte 1
Input byte 2
Input byte 3
Input byte 4
Control byte Status byte
control unit
Fig. 2.1.1-5: Internal Structure g065403e

12 •750-654 [Data Exchange Module]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.8 Process Image
Using the module 750-654, a 6 byte input and output process image can be
transferred to the fieldbus coupler / controller via one logical channel. The
data sent and received are stored in up to 5 output and input bytes (D0 ... D4).
One control byte (C) and one status byte (S) are used to control the data flow.
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.
Input data Output data
S Status byte C Control byte
D0 Input byte 0 D0 Output byte 0
D1 Input byte 1 D1 Output byte 1
D2 Input byte 2 D2 Output byte 2
D3 Input byte 3 D3 Output byte 3
D4 Input byte 4 D4 Output byte 4
Control byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 X X X X X X X
X not used
0 Constant value must always be 0
Status byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 X X RCVT1 RCVT2 CHK OVR PAR
PAR Parity error or wrong data in a frame.
OVR Buffer overflow
CHK Checksum error.
RCVT2 The receiver is in timeout.
RCVT1 Constant value always should be 0. Module is in timeout. All
output bits are set to 0 (watchdog).The receiver is in timeout. Checksum error.
Buffer overflowParity error or wrong data in a frame.
X not used
0 Constant value must always be 0

750-654 [Data Exchange Module] •13
Data Transfer
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.9 Data Transfer
The status byte is used as diagnostic byte for the data communication and
indicates the status of data communication with the partner module.
Control of the multiplex connection:
In the process image of the transmitting coupler/controller, one bit is set to "1"
for the whole time. As long as this bit is "1" in the receiving
coupler/controller, further input bits can be evaluated. If the bit is "0" the
multiplex connection has been disrupted. The further bits are also 0 because of
the watchdog.
Control of the multiplex connection with acknowledge:
If the transmitting coupler/controller gets an acknowledgement from the
receiving coupler/controller, the received bit must be transferred by the
application software as an output bit to the process image. The transmission is
successful as long as the bit is "1".
Handshake:
If a serial data exchange should be made with the data exchange module, the
handshake can be made via "Toggle Bits". Therefore an input bit and an
output bit are reserved. As soon as this input bit is different from this output
bit, a request from the opposite module is made. As soon as the request is
executed the output bit is negative (toggled).

WAGO Kontakttechnik GmbH & Co. KG
Postfach 2880 • D-32385 Minden
Hansastraße 27 • D-32423 Minden
Phone: [phone] – 0
Fax: [phone] – 1 69
E-Mail: [email protected]
Internet: http://www.wago.com