Phoenix Contact SHDSL Series User manual

User manual
SHDSL SERIAL permanent line modem, for
point-to-point, line, and star structures on in-
house cables
UM EN PSI-MODEM-SHDSL/SERIAL
Order No.: —

2011-12-06
104275_en_c00 PHOENIX CONTACT
SHDSL SERIAL permanent line modem, for point-to-point, line, and star
structures on in-house cables
UM EN PSI-MODEM-SHDSL/SERIAL
c00
—
Designation Revision Order No.
PSI-MODEMSHDSL/SERIAL 2313669
User manual
Designation:
Revision:
Order No.:
This user manual is valid for:

PHOENIX CONTACT
Please observe the following notes
User group of this manual
The use of products described in this manual is oriented exclusively to:
– Qualified electricians or persons instructed by them, who are familiar with applicable
standards and other regulations regarding electrical engineering and, in particular, the
relevant safety concepts.
– Qualified application programmers and software engineers, who are familiar with the
safety concepts of automation technology and applicable standards.
Explanation of symbols used and signal words
How to contact us
Internet Up-to-date information on Phoenix Contact products and our Terms and Conditions can be
found on the Internet at:
www.phoenixcontact.com
Make sure you always use the latest documentation.
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your Phoenix Contact subsidiary.
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Published by PHOENIX CONTACT GmbH & Co. KG
Flachsmarktstraße 8
32825 Blomberg
GERMANY
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layout of our manuals, please send your comments to:
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This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety measures that follow this symbol to avoid possible in-
jury or death.
There are three different categories of personal injury that are indicated with a
signal word.
DANGER This indicates a hazardous situation which, if not avoided, will re-
sult in death or serious injury.
WARNING This indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION This indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
This symbol together with the signal word NOTE and the accompanying text
alert the reader to a situation which may cause damage or malfunction to the
device, hardware/software, or surrounding property.
This symbol and the accompanying text provide the reader with additional in-
formation or refer to detailed sources of information.

PHOENIX CONTACT
General terms and conditions of use for technical documentation
Phoenix Contact reserves the right to alter, correct, and/or improve the technical documen-
tation and the products described in the technical documentation at its own discretion and
without giving prior notice, insofar as this is reasonable for the user. The same applies to any
technical changes that serve the purpose of technical progress.
The receipt of technical documentation (in particular user documentation) does not consti-
tute any further duty on the part of Phoenix Contact to furnish information on modifications
to products and/or technical documentation. You are responsible to verify the suitability and
intended use of the products in your specific application, in particular with regard to observ-
ing the applicable standards and regulations. All information made available in the technical
data is supplied without any accompanying guarantee, whether expressly mentioned, im-
plied or tacitly assumed.
In general, the provisions of the current standard Terms and Conditions of Phoenix Contact
apply exclusively, in particular as concerns any warranty liability.
This manual, including all illustrations contained herein, is copyright protected. Any
changes to the contents or the publication of extracts of this document is prohibited.
Phoenix Contact reserves the right to register its own intellectual property rights for the
product identifications of Phoenix Contact products that are used here. Registration of such
intellectual property rights by third parties is prohibited.
Other product identifications may be afforded legal protection, even where they may not be
indicated as such.

104275_en_c00 PHOENIX CONTACT i
Table of contents
1 Description of the SHDSL permanent line modem ..................................................................1-1
1.1 Description .........................................................................................................1-1
1.2 Ordering data .....................................................................................................1-2
1.3 Technical data ....................................................................................................1-2
1.4 SHDSL technology .............................................................................................1-5
1.5 Interface basics ..................................................................................................1-6
1.5.1 RS-232 ................................................................................................1-6
1.5.2 RS-422 ................................................................................................1-7
1.5.3 RS-485 W2 .........................................................................................1-8
1.6 Supported network structures.............................................................................1-9
1.6.1 Point-to-point connection ....................................................................1-9
1.6.2 Line structure (daisy chain) ...............................................................1-10
1.6.3 Star structure (for all interfaces) ........................................................1-11
1.6.4 Star structure via DIN rail connector and RS-485 interface ...............1-12
1.6.5 Star structure with other RS-485 components ..................................1-15
1.6.6 Branches and branch lines ...............................................................1-16
2 Hardware installation ..............................................................................................................2-1
2.1 Mounting the module on a DIN rail .....................................................................2-2
2.1.1 Mounting on a DIN rail (single device) .................................................2-2
2.1.2 Mounting with DIN rail connectors (connection station) ......................2-3
2.2 Description of the connections and LEDs...........................................................2-4
2.3 Establishing connections....................................................................................2-6
2.3.1 Safety notes ........................................................................................2-6
2.3.2 DSL connection ..................................................................................2-7
2.3.3 Connecting switching outputs .............................................................2-9
2.3.4 Connecting the serial interface .........................................................2-10
2.3.5 Connecting the USB interface ...........................................................2-13
2.3.6 Connecting the supply voltage ..........................................................2-14
2.4 Use in potentially explosive areas.....................................................................2-16
3 Configuration via PSI-CONF ...................................................................................................3-1
3.1 Installing PSI-CONF ...........................................................................................3-1
3.2 Getting started....................................................................................................3-3
3.2.1 Selecting the language .......................................................................3-3
3.2.2 Selecting the device ............................................................................3-3
3.2.3 Connection mode ................................................................................3-4
3.3 Configuration......................................................................................................3-5
3.3.1 Setting default settings ........................................................................3-9
3.4 Diagnostics.......................................................................................................3-10
3.4.1 Diagnostic overview ..........................................................................3-10
3.4.2 Event log ...........................................................................................3-13
3.4.3 Value log ...........................................................................................3-14
3.5 Transfer............................................................................................................3-15
3.6 Firmware update...............................................................................................3-16

PSI-MODEMSHDSL/SERIAL
ii PHOENIX CONTACT 104275_en_c00
4 Optimization ............................................................................................................................4-1
4.1 Optimizing the SHDSL data rate.........................................................................4-1
4.2 Increasing immunity to interference....................................................................4-2
5 Eliminating errors ....................................................................................................................5-1
5.1 Diagnostic IDs ....................................................................................................5-1

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-1
1 Description of the SHDSL permanent line modem
1.1 Description
The industrial SHDSL SERIAL permanent line modem enables broadband networking of
serial devices via in-house cables.
Areas of application
– Suitable for in-house cables, not for public telephone networks
– Point-to-point connection
– Star structure
– Line structure (daisy chain)
SHDSL technology
– Symmetrical data transmission
– 2 SHDSL ports per device
–Upto30Mbps(4-wire)
– Up to 15.3 Mbps (2-wire)
RS-232 interface (9-pos. D-SUB)
– Transparent protocol
– Automatic DCE/DTE switchover
– RS-232, up to 230.4 kbps
RS-485 W2/RS-422 interface (COMBICON plug)
– Transparent protocol
– RS-422, up to 2000 kbps
– RS-485 W2, up to 2000 kbps
– RS-485 W2: termination resistor, can be enabled/disabled
Alarm outputs
– Two digital outputs
– Can be configured individually
Configuration
– With configuration software
The configuration software also supports
– Online diagnostics
– Individual device configuration
– Guided project configuration
– Log book function
– Saving and printing of project and device configurations

PSI-MODEMSHDSL/SERIAL
1-2 PHOENIX CONTACT 104275_en_c00
1.2 Ordering data
1.3 Technical data
Modem
Description Type Order No. Pcs. / Pkt.
SHDSL permanent line modem, for point-to-point, line, and star structures
on in-house 2 and 4-wire cables
PSI-MODEMSHDSL/SERIAL 2313669 1
Accessories
Description Type Order No. Pcs. / Pkt.
System power supply unit,
primary-switched
Input voltage range
Nominal output voltage
Nominal output current
45 Hz ... 65 Hz
85 V AC ... 264 V AC
24 V DC ±1%
1.5 A
MINI-SYS-PS-100-240AC/24DC/1.5 2866983 1
DIN rail connector (2 required) ME 17,5 TBUS 1,5/ 5-ST-3,81 GN 2709561 1
RJ45 (RJ12/RJ11) attachment plug with surge protection for analog tele-
communications interfaces. Can alternatively be snapped onto DIN rails.
DT-TELE-RJ45 2882925 1
USB cable, USB type A/mini-USB type B, 5-pos., 1 m long PSI-CA-USB A/MINI B/1METER 2313575 1 m
USB cable, USB type A/mini-USB type B, 5-pos., 3 m long CABLE-USB/MINI-USB-3,0M 2986135 3 m
RS-232 cable, for connecting the modem to a
9-pos. device interface, 2 m long
9-pos. D-SUB/9-pos.
D-SUB (socket/socket)
PSM-KA9SUB9/BB/2METER 2799474 2 m
RS-232 cable, for connecting the modem to a
9-pos. device interface, 0.5 m long
9-pos. D-SUB/9-pos.
D-SUB (socket/socket)
PSM-KA9SUB9/BB/0,5METER 2708520 0.5 m
Adapter cable for connecting the IB IL RS232 and IB IL RS232-PRO Inline
communication terminals to an interface converter, e.g., modem, COM server,
Bluetooth or fiber optics
PSM-KAD-IL RS232/9SUB/B/0,8M 2319200 0.8 m
Supply
Supply voltage 18 V DC ... 30 V DC via plug-in COMBICON screw terminal block
24 V DC ±5% (alternative or redundant, via DIN rail connector and system
power supply)
5 V DC (configuration only, via mini-USB type B)
Nominal current consumption < 180 mA at 24 V
LED indicator VCC (green LED)
– Steady light: operation
– Flashing at 1 Hz: supply via USB (for configuration)
Switching outputs 2 x UNom/150 mA (the digital outputs cannot be used for power supply via the
DIN rail connector), short-circuit-proof
SHDSL interface
Connection method 2 x 2-pos. COMBICON plug-in screw terminal block
Type SHDSL interface according to ITU-T G.991.2.bis
Transmission speed
4-wire operation
2-wire operation
64 kbps ... 30 Mbps (manual setting of the data rate)
384 kbps ... 11.39 Mbps (automatic detection of the data rate)
32 kbps ... 15.3 Mbps (manual setting of the data rate)
192 kbps ... 5.696 Mbps (automatic detection of the data rate)
Transmission length Over 20 km possible at lower data rates and with good cable quality
Connection data (conductor cross section) 0.2 mm² ... 2.5 mm² (24 - 14 AWG)

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-3
Status and diagnostic indicators 2 x LINK, 2 x STAT (DSL data traffic port A and port B)
DIAG (yellow LED), diagnostic messages
ERR (red LED), errors
TERM (yellow LED), only relevant for RS-485
RS232 (yellow LED)
SHDSL interface
RS-232 interface
Connection method 9-pos. D-SUB plug
Type RS-232 interface, according to ITU-T V.28, EIA/TIA-232, DIN 66259-1
Transmission speed Can be freely parameterized from 92 bps ... 230.4 kbps
Transmission length 15 m, maximum
Supported protocols Software handshake (Xon/Xoff), hardware handshake (RTS/CTS), 3964R-
compatible, Modbus RTU/ASCII, transparent protocol - other protocols sup-
ported
Data format/encoding Serial asynchronous UART/NRZ, 7/8 data bits, 1/2 stop bits, 1 parity bit (even,
odd, mark, space, none), 9/10/11-bit character length
RS-422 interface
Connection method Plug-in and screw connection via COMBICON plug
Type RS-422 interface, according to ITU-T V.11, EIA/TIA-422, DIN 66348-1
Transmission speed Can be freely parameterized from 92 bps ... 2 Mbps
Transmission length 1200 m, maximum
Supported protocols Modbus RTU/ASCII and others, transparent protocol
Data format/encoding Serial asynchronous UART/NRZ, 7/8 data bits, 1/2 stop bits, 1 parity bit (even,
odd, mark, space, none), 9/10/11-bit character length
RS-485 interface
Connection method Plug-in and screw connection via COMBICON plug
Type RS-485 interface, according to EIA/TIA-485, DIN 66259-4/RS-485 2-wire
Transmission speed Can be freely parameterized from 92 bps ... 2 Mbps
Transmission length 1200 m, maximum
Supported protocols Modbus RTU/ASCII and others, transparent protocol
Data format/encoding Serial asynchronous UART/NRZ, 7/8 data bits, 1/2 stop bits, 1 parity bit (even,
odd, mark, space, none), 9/10/11-bit character length
USB interface (configuration/diagnostics)
Connection method Mini-USB type B, 5-pos.
Type USB 2.0
Transmission length 5 m, maximum, only for configuration and diagnostics
General data
Ambient temperature range
Operation (no other modules supplied via the device):
– Freestanding (40 mm spacing)
– Connected in series (low power dissipation of modules connected in se-
ries)
– Connected in series (without restrictions)
Operation (other modules supplied via the device (1.5 A, maximum))
Storage/transport
-20°C ... +60°C
-20°C ... +55°C
-20°C ... +50°C
-20°C ... +45°C
-40°C ... +85°C
Housing
Material
Dimensions (H x W x D)
ME 35 with 5-pos. bus contact and ground contact
PA 6.6-FR, V0, green
99 x 35 x 114.5 mm
Weight 205 g
Functional earth ground Housing contact to DIN rail
Degree of protection IP20

PSI-MODEMSHDSL/SERIAL
1-4 PHOENIX CONTACT 104275_en_c00
Housing dimensions
Figure 1-1 Housing dimensions (in mm)
Electrical isolation DIN EN 50178
(Supply // RS-485, RS-422 // DSL port A // DSL port B // FE)
MTBF according to Telcordia standard – 1004 years
Telcordia standard, 25°C ambient temperature, 21% operating cycles
(5 days a week, 8 hours a day)
– 199 years
Telcordia standard, 40°C ambient temperature, 34.25% operating cycles
(5 days a week, 8 hours a day)
Test voltage 1.5 kV AC, 50 Hz, 1 min.
Vibration resistance According to IEC 60068-2-6: 5g, 150 Hz
Shock resistance 15g in each space direction, according to IEC 60068-2-27
Noise emission EN 55011
Noise immunity EN 61000-6-2
Electromagnetic compatibility Conformance with EMC Directive 2004/108/EC
UL, USA/Canada UL 508 listed in preparation
Manufacturer's declaration EN 50121-4 (Railway applications - Electromagnetic compatibility, Part 4:
Emission and immunity of the signaling and telecommunications apparatus)
Exceptions include installations within the 3 m area and safety-related de-
vices. For these devices, there are further requirements according to
EN 50121-4 Table 1, Note 1.
Section 1, Paragraph 3 of EN 50121-4 applies. Phoenix Contact QUINT power
supply units are to be used directly on the device.
Conformity assessment according to directive 94/9/EC XII 3 G Ex nAC IIC T4 X
General data (Fortsetzung)
104275A001
114,5 35
99
PSI-MODEM-SHDSL/SERIAL
Ord.-No. 23 13 669
VCC
DG
RD
TD
ERR
LINK
STAT
LINK
STAT
DSL A
DSL B
SERIAL
RS232
USB
TERM
RS232

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-5
1.4 SHDSL technology
SHDSL (Symmetrical High-Speed Digital Subscriber Line) enables the same data transmis-
sion speeds for up and downstream via one or two double wires.
Data rates of up to 15.3 Mbps are possible per cable pair.
Figure 1 Dependency of the maximum SHDSL data rate (Mbps) on the line length for a
2-wire connection
Figure 1 illustrates the dependency of the maximum data rate on the line length with three
cable types. Higher data rates or longer distances can be achieved when high-quality ca-
bles with larger diameters are used.
Industrial SHDSL permanent line modems from Phoenix Contact support data rates of
32 kbps to 15.3 Mbps in 2-wire operation and data rates of up to 30 Mbps in 4-wire opera-
tion.
SHDSL permanent line modems are suitable for in-house cables, not for public telephone
networks.
The maximum possible transmission speed greatly depends on the cable length, the ca-
ble cross section, and the cable type.
10.0
8.0
6.0
4.0
2.0
0.0
0.0 2.0
km
4.0 6.0 8.0 10.0
SHDSL data rate [Mbps]
16.0
14.0
12.0
11.0
12.0 14.0 16.0 18.0 20.0
PE 1.4 mm (1.54 mm²)
PE 0.4 mm (0.13 mm²)
PE 0.9 mm (0.64 mm²)

PSI-MODEMSHDSL/SERIAL
1-6 PHOENIX CONTACT 104275_en_c00
1.5 Interface basics
1.5.1 RS-232
The RS-232 interface is a widely used serial interface, which is defined in standards EIA-
232 and CCITT V.24.
This interface carries out data exchange between two devices (point-to-point connection).
It transmits and receives data in full duplex mode over lines of up to 15 m. The maximum
transmission speed is 230.4 kbps.
In the simplest configuration, three cables are required:
– TxD (transmit data)
– RxD (receive data)
– GND (common signal ground)
For more complex data transmission with hardware handshake, additional control and sig-
nal lines are required.
The RS-232 interfaces of devices can be designed as data communication equipment
(DCE) or data terminal equipment (DTE). In the case of a DTE device, data is transmitted
via the TxD connection, whereas a DCE device receives data via this connection.
A DTE device can be connected to a DCE device via a linear connection. When connecting
two devices of the same type (DTE/DTE or DCE/DCE), all cables must be crossed.
The SHDSL modem supports automatic switchover between DTE/DCE (see "Connecting
the serial interface" on page 2-9).
Figure 1-2 Pin assignment of the RS-232 interface for 25-pos. D-SUB (9-pos. D-SUB)
The signal level is defined as follows:
Data cables -3 V ... -15 V for logic "1"
+3 V ... +15 V for logic "0"
Control/signal lines -3 V ... -15 V for logic "0"
+3 V ... +15 V for logic "1"
Properties of RS-232
Standards ITU-T V.24/DIN 66020-1, ITU-T V.28/DIN 66259-1, TIA/EIA-232
Transmission
speed
230.4 kbps, maximum
Transmission
length
15 m,
max.
(RS-232)
For industrial applications, we recommend reducing
the distance to 5 m at a high transfer speed.
Method Voltage interface
Principle Full duplex, point-to-point, no multipoint connection
PE PE11
2 (3) 2 (3)
3 (2) 3 (2)
4 (7) 4 (7)
5 (8) 5 (8)
6 (6) 6 (6)
7 (5) 7 (5)
8 (1) 8 (1)
20 (4) 20 (4)
TxD TxD
RxD RxD
RTS RTS
CTS CTS
DSR DSR
GND GND
DCD DCD
DTR DTR
DTE DCE

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-7
1.5.2 RS-422
The RS-422 standard supports serial data transmission in full duplex mode between two de-
vices. In the case of the RS-422 interface, data can travel distances of up to 1200 m. Trans-
mission speeds of up to 2000 kbps are possible.
The RS-422 interface is operated with at least two data channels: transmit (T) and receive
(R).
Figure 1-3 RS-422 interface
Termination resistors (100 ... 200 ohms) are provided at the inputs of the receiver. These
resistors prevent reflections on the transmission cable and increase transmission reliability.
In addition, to ensure reliable transmission the differential mode voltage between twisted
wire pairs is evaluated. Interference voltages in relation to ground are not taken into consid-
eration.
The signal level is defined as follows:
Data cables -0.3 V to -6 V for logic "1" The signal status is indicated
by the voltage between mea-
suring points (A) and (B).
+0.3 V to +6 V for logic "0"
Properties of RS-422
Standards ITU-T V.11/DIN 66259-3, TIA/EIA-422
Transmission speed 2000 kbps, maximum
Transmission length 1200 m, maximum (on the RS-422 side)
Method Voltage difference, twisted pair
Principle Full duplex, point-to-point, no multipoint connection
.For additional information, please refer to "Connecting the serial interface" on page 2-9.
T (A)
DTE DTE
R (A)
R (A)
T (A)
T (B)
R (B)
R (B)
T (B)

PSI-MODEMSHDSL/SERIAL
1-8 PHOENIX CONTACT 104275_en_c00
1.5.3 RS-485 W2
The RS-485 W2 interface is similar to the RS-422 interface. The electrical levels and their
logical assignment are identical to those of the RS-422 standard. In addition, the RS-
485 W2 interface offers the option of multipoint connections.
In the case of a multipoint connection, all devices are addressed and identified via a single
address. Only one device may transmit at any given moment, all other devices are in "listen-
ing mode".
In the case of the RS-485 W2 interface, W2 stands for 2-wire technology. Data transmission
is based on the half duplex method, where data is alternately transmitted and received.
Figure 1-4 RS-485 W2
The 2-wire bus cable can be up to 1200 m long. It must be terminated at both ends by a ter-
mination resistor (100 ... 200 ohms). The individual devices can be located away from the
bus cable using branch lines. The length of the branch lines depends on the data rate. We
recommend that the branch lines used are as short as possible.
The transmission speed is up to 2000 kbps when using a twisted pair shielded data cable.
The RS-485 standard only describes the physical properties. RS-485 interfaces are not
necessarily compatible with one another. Additional parameters such as transmission
speed, data format, and data encoding are defined in system standards such as PROFIBUS
or Modbus.
Properties of RS-485 W2
Standards ISO/IEC 8482/DIN 66259-4, TIA/EIA-485 (draft)
Transmission speed 2000 kbps, maximum
Transmission length Depends on the data rate
Method Voltage difference, twisted pair
Principle Half duplex, multipoint
For additional information, please refer to "Connecting the serial interface" on page 2-9.
+
+
-
-
TD RD
RD
RD TD
TD

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-9
1.6 Supported network structures
1.6.1 Point-to-point connection
Figure 1-5 Point-to-point connection
A point-to-point connection is a direct connection between two devices without an interme-
diate station.
Distances of over 20 km can be covered at low data rates and with good cable quality.
In principle, the following interfaces can be used for a point-to-point connection:
– RS-232, up to 230.4 kbps
– RS-422, up to 2000 kbps
– RS-485 W2, up to 2000 kbps
In mixed operation with an RS-232 device and an RS-422 or RS-485 device, hardware or
software handshake is not supported.
In the case of RS-422 and RS-485, there are no cables designed for hardware hand-
shake. This is therefore not supported.
There is no defined general software handshake for all three interfaces. This is therefore
not supported either.
You can implement a point-to-point connection in which full and half duplex interfaces are
used (e.g., RS-485 and RS-232/RS-422). In this case, however, the protocol must ensure
that all interfaces are operated in half duplex mode.
In an RS-422 configuration (point-to-point connection), all termination resistors are acti-
vated automatically via the software.
In an RS-485 W2 configuration, the termination resistor can be enabled and disabled via
the PSI-CONF configuration software.
Table 1-1 Information on the interfaces
Interface basics Connection to the SHDSL modem
(connector pin assignment)
RS-232 See "RS-232" on page 1-6 See "RS-232 interface" on page 2-10
RS-422 See "RS-422" on page 1-7 See "RS-485 W2/RS-422 interface"
on page 2-11
RS-485 W2 See "RS-485 W2" on page 1-8
SHDSL
SHDSL
RS 232
RS 422
RS 485
RS 232
RS 422
RS 485
SHDSL4Wire
SHDSL
SHDSL
RS 232
RS 422
RS 485
RS 232
RS 422
RS 485
SHDSL2Wire

PSI-MODEMSHDSL/SERIAL
1-10 PHOENIX CONTACT 104275_en_c00
1.6.2 Line structure (daisy chain)
Figure 1-6 Line structure
A line structure (daisy chain) is a number of components that are connected in series. Using
the permanent line modem, up to 255 devices can be connected together in 2-wire opera-
tion.
Distances of over 20 km can be covered at low data rates and with good cable quality.
You can implement a line structure in which full and half duplex interfaces are used (e.g.,
RS-485 and RS-232/RS-422). In this case, however, the protocol must ensure that all in-
terfaces are operated in half duplex mode.
If a line structure is created with just full duplex-compatible interfaces (RS-232, RS-422),
the protocol must ensure half duplex mode.
RS-232 and RS-422 interfaces are usually designed for a point-to-point connection and
not a line structure.
In mixed operation with an RS-232 device and an RS-422 or RS-485 device, hardware or
software handshake is not supported.
In the case of RS-422 and RS-485, there are no cables designed for hardware hand-
shake. This is therefore not supported.
There is no defined general software handshake for RS-232, RS-422, and RS-485. This
is therefore not supported either.
RS-485 RS-485 RS-485
SHDSL
SHDSL SHDSL
RS 232
RS 232
RS 422
RS 485
RS 232
RS 422
RS 485
Standard Special case, half duplex
(RS-232/RS-422 and RS-485)
Table 1-2 Information on the interfaces
Interface basics Connection to the SHDSL modem (connector pin assign-
ment)
RS-232 See "RS-232" on page 1-6 See "RS-232 interface" on page 2-10
RS-422 See "RS-422" on page 1-7 See "RS-485 W2/RS-422 interface" on page 2-11
RS-485 W2 See "RS-485 W2" on page 1-8

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-11
1.6.3 Star structure (for all interfaces)
Figure 1-7 Star structure (RS-232, RS-422, RS-485)
The star structure in the example (Figure 1-7) consists of three modems. It is a line structure
where the middle modem has been moved up to act as the head station. This means that
two SHDSL ports are available at each modem.
In mixed operation with an RS-232 device and an RS-422 or RS-485 device, hardware or
software handshake is not supported.
In the case of RS-422 and RS-485, there are no cables designed for hardware hand-
shake. This is therefore not supported.
There is no defined general software handshake for RS-232, RS-422, and RS-485. This
is therefore not supported either.
You can implement a line structure in which full and half duplex interfaces are used (e.g.,
RS-485 and RS-232/RS-422). In this case, however, the protocol must ensure that all in-
terfaces are operated in half duplex mode.
If a line structure is created with just full duplex-compatible interfaces (RS-232, RS-422),
the protocol must ensure half duplex mode.
RS-232 and RS-422 interfaces are usually designed for a point-to-point connection and
not a line structure.
RS-232
RS-422
RS-485
RS-232
RS-422
RS-485
RS-232
RS-422
RS-485
Half duplex
Table 1-3 Information on the interfaces
Interface basics Connection to the SHDSL modem (connector pin
assignment)
RS-232 See "RS-232" on page 1-6 See "RS-232 interface" on page 2-10
RS-422 See "RS-422" on page 1-7 See "RS-485 W2/RS-422 interface" on page 2-11
RS-485 W2 See "RS-485 W2" on page 1-8

PSI-MODEMSHDSL/SERIAL
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1.6.4 Star structure via DIN rail connector and RS-485 interface
Figure 1-8 Star structure, RS-485
The devices are connected via the DIN rail connector (T-BUS) in the head station.
The DIN rail connector supports RS-485. It can not be used with RS-232 and RS-422.
In order to configure a star structure, you must create several line structures.
In the example, you need to create two line structures, each consisting of three devices.
Figure 1-9 Example for a star structure (RS-485 interface on all devices)
In principle, a star structure via the DIN rail connector can only be used in combination
with the RS-485 interface.
Make sure that all devices connected via the DIN rail connector (T-BUS) use the
same serial data rates.
SHDSL SHDSL SHDSL
SHDSL
SHDSL SHDSL
......
RS 485
RS 485 RS 485 RS 485 RS 485
SHDSL SHDSL SHDSL
SHDSL
SHDSL SHDSL
......
RS 485
RS 485 RS 485 RS 485 RS 485
SHDSL
SHDSL SHDSL
C D F
SHDSL
SHDSL SHDSL
A C
D F
B
E
B E
Line 1
Line 2
A

Description of the SHDSL permanent line modem
104275_en_c00 PHOENIX CONTACT 1-13
Figure 1-10 Star structure with SHDSL devices (1), RS-485 on all devices
In order to configure the above structure, you must proceed as follows:
•Divide the overall structure into several lines (sections A, B, C)
•Configure each line individually via the PSI-CONF configuration software.
We recommend beginning with the critical line. These, for example, are long lines with
many devices and small cable diameters.
Another example
Figure 1-11 Star structure with SHDSL devices (2), RS-485 on all devices
In this example the termination device for line C is not in the head station. The sequence is
the same as above (see Figure 1-10 on page 1-13).
A1
B1
AB
C
T-BUS
A2 A3 A4
A5 C3 B2
C2
C1
RS-485
B1
C2
C1
AB
C
A5 C3
B2
T-BUS
C4
A1 A2 A3 A4
RS-485

PSI-MODEMSHDSL/SERIAL
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Structure of a head station
For the star structure, individual line structures are coupled together via a head station. In
both examples above, devices A5, B2, and C3 are connected via a DIN rail connector
(T-BUS).
Figure 1-12 Examples for RS-485 head stations
Key
①, ②, ③... Segments
For a head station, we recommend connecting devices via the T-BUS. In this way, the
segments are electrically isolated.
T-BUS
①
②
③④
⑤
⑥
①
②
③④
⑤
⑥⑦⑧
Not recommended (RS-485) Recommended (RS-485)