82.031.0101.0 WIELAND ELECTRIC, 82.031.0101.0 Datasheet - Page 554

• Manufacturer Part Number: 82.031.0101.0
• Description: COUPLING MODULE
• Manufacturer: WIELAND ELECTRIC

Specifications of 82.031.0101.0

• Connector Type: Modular
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SSW
Principles of serial interfaces
The increasing use of a variety of
automation techniques in all areas of
industry requires the processing of an
increasing amount of information. The
most important transmission media is
serial data cables which are used to
control complex processes and record
process data. Further transmission media
are optical fibres and infrared
transmission.
A wide variety of serial interfaces are used
which are not compatible with each other
and frequently do not fulfil the increasing
demands as regards to interference
immunity, range and speed.
The Wieland SSW product range has
tackled this problem and guarantees a
noise-free and high-capacity data
transmission in hostile industrial
conditions.
RS 232 (V.24) interface
One of the most widely used serial
interfaces is defined in the American norm
EIA-232 and in the international standard
CCITT V.24.
The data interface realises data exchange
between two data processing devices
(point-to-point connection) up to a
maximum of 15 m in full duplex mode.
In the simplest configuration, three
conductors TxD (sending data), RxD
(receiving data) and GND (common signal
ground) are required for this connection.
The data transmission is controlled by the
so-called XON/XOFF protocol (software
handshake). If the transmission
co-ordination should be controlled via
hardware handshake, further control,
signal and timing cables are available.
TTY current loop interface
The TTY current loop interface is a very
well-known remote transmission interface
which has its origins in telegraphy. They
can be found nowadays in programmable
controllers (PLC), visual display units and
printers. A pair of conductors are required
for both the sending and receiving of data.
The data transmission is carried out via
software handshake in full duplex mode.
A loop current of 20 mA represents the
state of logical “1”. If the circuit is
interrupted, this is evaluated as logical
“0”. A current-driven source is required in
each loop which must either be coupled
on the sending or receiving side.
552
Function modules
Interface converter
SSW
RS-422(V.11) interface
Data communication with intelligent
machines requires particularly rapid and
high-capacity communication interfaces.
The RS 422 standard fulfils these
requirements. It carries out the serial
transmission of data in full duplex mode
between two devices at a transmission
rate up to 10 Mbit/s and a maximum
distance of 1000 m.
The interface is operated at minimum with
a “Sending” data channel (TxD) and a
“Receiving” data channel (RXD). The
sending and receiving co-ordination is
implemented via software handshake.
The high rate of transmission reliability is
achieved by the evaluation of the
differential voltage between a twisted
core pair. Interference voltages towards
the zero potential are not evaluated. The
electrical levels of the data cables are
defined as
RS-485(2 wire) interface
This serial interface type offers the
possibility of multipoint connections of up
to 32 devices as well as performance.
The electrical levels and their logical
assignment are identical to the RS 422
standard
Limited by the 2-wire technology, the data
transmission can however only take place
according to half duplex mode i.e. the
sending and receiving of data takes place
alternately and must be controlled via an
appropriate software program. In contrast
to pure point-to-point communication, it
must be possible to address and identify
all the devices of a multipoint connection
via an address using a corresponding
software protocol. Only one device may
send at the same time. All the other
devices are meanwhile in listening mode.
The 2-wire bus cable can be up to 500 m
long and must be terminated at both ends
with an EOL resistor (100-200 ohm). The
individual devices can be sent via spur lines
up to 5 m from the bus cable.
The maximum transmission rate is 10
Mbit/s when using data cable that is twisted
and shielded in pairs.
–0,3 V to –6 V for logical “1“ and
+0,3 V to +6 V for logical “0“.
SSW-V.24 // TTY
The V.24 // interface converters are used
to convert an RS 232 interface into a 20
mA current loop interface TTY or vice
versa (e.g. between a PC and a PLC).
Due to the low capacity of RS 232
interfaces (15 m), the converters are
installed as closely as possible to these
interfaces. It is possible to bridge up to
1000 m via a cable that is twisted and
shielded in pairs with the insulated and
noise-free TTY signal.
SSW-V.24 // RS 422
The V.24 // RS-422-interface converters
are used to convert an RS 232 interface
into an RS 422 interface or vice versa.
With the high-capacity and noise-free RS
422 interface, it is possible to bridge
distances up to 1000 m using a cable that
is twisted and shielded in pairs.
SSW-V.24 // RS 485
The RS-485-standard is used when more
than two devices should communicate
with each other. By converting the point-
to-point RS 232 interface into the RS 485
standard with bus capability, up to 32
devices can be interconnected via a 2-wire
cable.
The V.24 // RS-485-interface converters
are used to convert an RS 232 interface
into an RS 485 2-wire bus interface with
multipoint capability or vice versa.
The interface converters operate
independently of the protocol and code
i.e. all the bus devices must support the
same transmission protocol and the same
speed.
Subject to change without further notice