WAGO I/O-SYSTEM 750 User manual

Fieldbus Independent
I/O Modules
Serial Interface RS 485
750-653 (/xxx-xxx)
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 Special Modules ....................................................................................... 7
2.1.1 750-653 (/xxx-xxx) [Serial Interface RS 485]..................................... 7
2.1.1.1 View................................................................................................ 7
2.1.1.2 Variations........................................................................................ 7
2.1.1.3 Description...................................................................................... 8
2.1.1.4 Display Elements ............................................................................ 9
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..................................................................................14
2.1.1.9.1 Example....................................................................................15
2.1.1.10 Adjustable Variation 750-653/003-000 ........................................ 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 Digital Input Module 750-653 (/xxx-xxx) Serial
Interface RS 485 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.

750-653 (/xxx-xxx) [Serial Interface RS 485] •7
View
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Special Modules
2.1.1 750-653 (/xxx-xxx) [Serial Interface RS 485]
2.1.1.1 View
TxD
RxD
MM
SS
13 14
C
D
B
A
750-653
TxD
RxD
__
__
TxD
Data contacts
RxD
RxD
Common
(ground)
Shield
(screen)
TxD
Function
TxD
Shield
(screen)
RxD
Common
(ground)
___
___
Fig. 2.1.1-1: Serial Interface 750-653 g065300e
2.1.1.2 Variations
Item-No. Designation Description
750-653 RS 485/ 9600/ N/ 8/ 1 Baud rate: 9600 baud;
Parity: none; data bits: 8, stop bits: 1
750-653/000-001 RS 485/ 9600/ E/ 7/ 2 Baud rate: 9600 baud;
Parity: Even; data bits: 7, stop bits: 2
750-653/000-002 RS 485/ 9600/ E/ 8/ 1 Baud rate: 9600 baud;
Parity: even; data bits: 8, stop bits: 1
750-653/000-006 RS 485/ 19200/ N/ 8/ 1/
5 byte
Baud rate: 19200 baud;
Parity: none; data bits: 8,
stopbits: 1, user data: 5 byte
750-653/000-007 RS 485/ 2400/ N/ 8/ 1 Baud rate: 2400 baud;
Parity: none; data bits: 8, stop bits: 1
750-653/003-000 RS 485 adjustable Data transmission and handshake
parameterizable with
WAGO-I/O-CHECK 2

8 •750-653 (/xxx-xxx) [Serial Interface RS 485]
Description
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.3 Description
This interface allows the connection of any device which is equipped with a
RS 485 serial interface.
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 interface works standard-conformal according to DIN 66259.
The connected device may communicate over the fieldbus coupler/-controller
with the control unit directly. The active communication channel works
independently of the higher-level fieldbus system and allows full duplex
operation up to 19200 baud.
Three green LEDs signal readiness for operation and troublefree internal bus
communication as well as the condition of the signal transmission.
The RS 485 interface guarantees high interference immunity because of the
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 serial interface module 750-653 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 XXXX4108.... and
higher. The version is specified in the manufacturing number, which is part of
the lateral marking of the module.

750-653 (/xxx-xxx) [Serial Interface RS 485] •9
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
Function
on Operational readiness and trouble-
free internal data bus
communication
off 1) Signal transmission TxD runningB
green
TxD
on No signal transmission TxD
off 1) Signal transmission RxD runningD
green
RxD
on No signal transmission 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.
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
750-653
Fig. 2.1.1-3: Serial Interface 750-653 g065301e

10 •750-653 (/xxx-xxx) [Serial Interface RS 485]
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/halfduplex
Baud rate 1200 ... 19200 baud
Bit transfer via differential signals
Transmission length ca. 1000 m twisted pair
Buffer 120 byte in / 16 byte out
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)
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)
RINA (Registro Italiano Navale)
CULUS (UL1604) Class I Div2 ABCD T4A
KEMA II 3 G EEx nA II T4
Conformity Marking

750-653 (/xxx-xxx) [Serial Interface RS 485] •11
Functional description
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 Functional description
The interface module is designed to operate with all WAGO I/O fieldbus
couplers. The serial interface module allows the connection of RS485 or
RS488-Interface devices to the WAGO I/O SYSTEM. The RS485/RS488
Interface module can provide gateways within the fieldbus protocol. This
allows serial equipment such as printers, barcode readers, and links to local
operator interfaces to communicate directly by the fieldbus protocol with the
PLC or PC Master. This module supports no higher level of protocol.
Communication is made completely transparent to the fieldbus allowing
flexibility in further applications of the serial interface module. The
communication protocols are configured at the Master PLC or PC.
The 120 byte input buffer provides for high rates of data transmission. When
using lower rates of transmission speed you can collect the received data, with
less priority, without loosing data.
The 16 byte output buffer provides for faster transmission of larger data
strings.
The data transmission takes place at 9,600 baud (default value). 1 startbit, 8
databits and 1 stopbit will be transmitted. No parity is available. The drivers
are high ohmic. The control of data is made by the user software.

12 •750-653 (/xxx-xxx) [Serial Interface RS 485]
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
Attention
The data transmission takes place at 9600 baud. 1 startbit, 8 databits and 1
stopbit will be transmitted. No parity is available. The drivers are high
ohmic. The control of data is made by the user software.
Attention
The interface module can be used for bus connections as well as for point to
point connections. With bus connections, modules that are not connected to
the power supply can also be wired. They do not disturb the bus connection.
TransmitterTransmitter Transmitter
Receiver
and receiverand receiver and receiver
Transmitter
Termination Termination
Point to point connection Bus connection
TxD
RxD
MM
SS
13 14
C
D
B
A
750-653
TxD
RxD
__
__
TxD
RxD
MM
SS
13 14
C
D
B
A
750-653
TxD
RxD
__
__
R
R
RR
R = 150 WR = 150 W
Fig. 2.1.1-4: Connection of the RS 485 interface module g065302e
2.1.1.8 Process Image
Using the module 750-653, 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.
Up to five characters which have been received by interface can be stored in
the input bytes. The output bytes will contain the characters to be sent.

750-653 (/xxx-xxx) [Serial Interface RS 485] •13
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
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 **)
*) for variations with 4 data bytes, **) for variations with 5 data bytes
Control byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 OL 2 OL 1 OL 0 0 IR RA TR
TR Transmit request
RA Receive acknowledge
IR Initialization request
OL 0,
OL 1,
OL 2
Output length (number of characters to be sent, which have been stored in the
output bytes)
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 IL 2 IL 1 IL 0 BUF_F IA RR TA
TA Transmit acknowledge
RR Receive request
IA Initialization acknowledge
BUF_F Buffer full
IL 0,
IL 1,
IL 2
Input length (number of received characters , which have been stored in the
input data)
0 Constant value is always 0

14 •750-653 (/xxx-xxx) [Serial Interface RS 485]
Data transfer
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.9 Data transfer
With the control and status byte the controlling of the sending and receive
mode takes place. Requests are indicated by a bit change of state. An assigned
bit indicates execution by adopting the value of the request bit.
Initialization of the module:
• Set IR bit in the control byte
• Initialization of the module
• Transmit/receive functions are blocked
• Output/input buffers are erased
• Serial interface module will load its configuration data
Transmitting data:
• TR=TA: put characters into output bytes
• Amount of characters is specified in OL0 to OL2
• TR is inverted and read out
• Characters are put into output buffer if TR=TA
Receiving data:
• RR≠RA: data in input bytes characters are available
• Amount of characters is specified in IL0 to IL2
• Characters in IL0 to IL2 are read out
• RA is inverted and read out
• All characters are read when RR=RA
The transmitting and receiving of data can be done simultaneously. The
initialization request has priority and will stop transmitting and receiving of
data immediately.
Attention
Resetting the initialization bit can be performed with the following message.
Message: input buffer full (Bit 3)
Input buffer is full. Data which is being currently received is now lost.

750-653 (/xxx-xxx) [Serial Interface RS 485] •15
Data transfer
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.9.1 Example
The module is initialized.
The initialization bit in the control byte is set.
Output byte 0 Control byte Output byte 2 Output byte 1
0x00 '0000.0100' 0x00 0x00
After the initialization has been executed, the status byte will give back
000.0100.
Input byte 0 Status byte Input byte 2 Input byte 1
XX '0XXX. X0XX' XX XX Module is still being
reset.
XX '0XXX. X1XX' XX XX Initialization
completed.
Sending of the data string "Hello”
The first 3 characters and the buffer length of 3 are transmitted.
Output byte 0 Control byte Output byte 2 Output byte 1
"H" (0x48) '0011.0000' "1" (0x6C) "a" (0x60)
The transmission request bit (TR) is inverted.
Output byte 0 Control byte Output byte 2 Output byte 1
"H" '0011.0001' "1" "a"

16 •750-653 (/xxx-xxx) [Serial Interface RS 485]
Data transfer
WAGO-I/O-SYSTEM 750
I/O Modules
As soon as TR=TA, the rest of the data can be sent.
Input byte 0 Status byte Input byte 2 Input byte 1
XX '0XXX.XXX0' XX XX The data is still
being transferred.
XX '0XXX.XXX1' XX XX Data transfer
completed.
The last 2 characters and the buffer length of 2 are transmitted.
Output byte 0 Control byte Output byte 2 Output byte 1
"1" '0010.0001' XX "o" (0x6F)
The transmission request bit (TR) is inverted.
Output byte 0 Control byte Output byte 2 Output byte 1
"1" '0010.0000' XX "o"
As soon as TA = TR, the data has been transferred to the output buffer.
Input byte 0 Status byte Input byte 2 Input byte 1
XX '0XXX. XXX1' XX XX The data is still
being transferred.
XX '0XXX. XXX0' XX XX Data transfer
completed.
Receiving the character chain "WAGO”
As soon as RA≠RR, the input bytes contain data.
Output byte 0 Control byte Output byte 2 Output byte 1
XX '0XXX.000X' XX XX
Input byte 0 Status byte Input byte 2 Input byte 1
XX '0XXX. 0X0X' XX XX No received data
available..
"W" '0011.0X1X' "G" "A" The information is in
the input bytes.

750-653 (/xxx-xxx) [Serial Interface RS 485] •17
Data transfer
WAGO-I/O-SYSTEM 750
I/O Modules
After the 3 characters have been processed, RA is inverted.
Output byte 0 Control byte Output byte 2 Output byte 1
XX '0XXX.001X' XX XX
If RA≠RR, the receiving of additional characters will continue.
Input byte 0 Status byte Input byte 2 Input byte 1
XX '0XXX. 0X1X' XX XX No received data
available.
'O' '0001.0X0X' XX XX The information is in
the input bytes.
After the characters have been processed, RA is inverted.
Output byte 0 Control byte Output byte 2 Output byte 1
XX '0XXX.000X' XX XX
Note
An X indicates that this particular value has no importance.
XX indicates that the whole value has no importance.

18 •750-653 (/xxx-xxx) [Serial Interface RS 485]
Adjustable Variation 750-653/003-000
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.1.10 Adjustable Variation 750-653/003-000
The operation mode of the module variation 750-653/003-000 is freely
parameterizable with the help of the start-up tool WAGO I/O CHECK 2 (item
number: 759-302).
The pre-setting is 9600 Baud, 8 data bits, no parity, 1 stop bit.
In this mode of operation the module has the same behavior and also the same
process values as the base module 750-653. If another mode of operation is
selected by changing the parameters, then the module behaves according to
the variation with the selected mode of operation.
The parameter dialog box in WAGO I/O CHECK 2 offers selection fields for
the available settings of this I/O module.
This description is intended for software version 41.
Select box Available settings
Baudrate 1200 Baud / 2400 Baud / 4800 Baud /
9600 Baud* / 19200 Baud / 38400 Baud /
57600 Baud
Data frame 7 Databits, Even Parity / 7 Databits, Odd Parity /
8 Databits, No Parity* / 8 Databits, Even Parity /
8 Databits, Odd Parity
Stopbits 1* / 2 Number of stopbits
Standard (see mapping-tables in the coupler- /
controller-manual)
Output format
Alternative* (see mapping-tables in the coupler- /
controller-manual)
Data bytes (BK) 3* / 4 / 5 Number of data bytes (see mapping-tables
in the coupler- / controller-manual)
Fullduplex* Simultaneous send and receive is possible
with 4-wire connection.
Duplex Mode
Halfduplex Simultaneous send and receive is not
possible with 2-wire connection.
Normal* State byte and data bytes are transmitted
in the same KBUS cycle
Copy State Byte
Retarded The state byte is transmitted one KBUS
cycle later after data bytes are transmitted.
This causes a lower data transmission
rate.

750-653 (/xxx-xxx) [Serial Interface RS 485] •19
Adjustable Variation 750-653/003-000
WAGO-I/O-SYSTEM 750
I/O Modules
Select box Available settings
OFF* The module does not support the
XON/XOFF-protocol when sending data.
XON / XOFF
(send)
ON The module supports the XON/XOFF-
protocol when sending data.
The module sends the data delivered by
the PLC until the XOFF (DC3==0x13)
character is received from the communi-
cation partner.
The transmission is halted until the XON
(DC1==0x11) character is received.
OFF* The module does not support the
XON/XOFF-protocol when receiving
data.
XON / XOFF
(receive)
ON The module supports the XON/XOFF-
protocol when receiving data.
The module sends the XOFF control
character if the receive buffer contains
more than 110 characters. XON is sent
once XOFF has been sent and the buffer
contains less than 18 bytes.
RS 485* 2-wire multipoint connectionsModule Type
RS 422 4-wire point to point connections
OFF* Continuous data transmission from FIFO
is not active.
Continuous
Send
ON Continuous data transmission from FIFO
is active.
The send buffer is filled by the PLC (up
to 16 bytes). The buffer content is sent
with the rising edge in bit 3 of the control
byte. Acknowledgement of the
transmitted data is done by setting the bit
2 of the status byte.
Bit 2 of the status byte is reset with bit 3
of the control byte.
* default settings
Additional information
Detailed information for parameterizing this I/O module is to be found in the
documentation to the start-up tool WAGO I/O CHECK 2 or also in the
internet under: www.wago.com.

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