Westermo TD-23 User guide

6600-2204
TD-23
Leased Line
V.23 Modem
Multidrop applications
www.westermo.com
© Westermo Teleindustri AB
User Guide
Legal information
The contents of this document are provided “as is”. Except as required by applicable
law, no warranties of any kind, either express or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose, are made
in relation to the accuracy and reliability or contents of this document. Westermo
reserves the right to revise this document or withdraw it at any time without prior
notice.
Under no circumstances shall Westermo be responsible for any loss of data or income
or any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
http://www.westermo.com
2
6600-2204
Safety
!
Before installation:
This modem is for restricted access area use only.
Read this manual completely and gather all information on the unit. Make sure
that you understand it fully. Check that your application does not exceed the safe
operating specifications for this unit.
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be
possible to disconnect manually from the power supply. Ensure compliance to
national installation regulations.
This unit uses convection cooling. To avoid obstructing the airflow around the unit,
follow the spacing recommendations (see Cooling section).
!
Before mounting, using or removing this unit:
Prevent access to hazardous voltage by disconnecting the unit from power supply.
Warning! Do not open connected unit. Hazardous voltage may occur within this
unit when connected to power supply.
Care recommendations
Follow the care recommendations below to maintain full operation of unit and to fulfil
the warranty obligations.
This unit must not be operating with removed covers or lids.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling above the specification may cause
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not waterproof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo
distributor office or Westermo Tech support.
Maintenance
No maintenance is required, as long as the unit is used as intended within the specified
conditions.
6600-2204
3
Agency approvals and standards compliance
Type
Approval / Compliance
EMC
EN 61000-6-2, Immunity industrial environments
EN 55024, Immunity IT equipment
EN 61000-6-3, Emission residential environments
FCC part 15 Class B
EN 50121-4, Railway signalling and telecommunications apparatus
IEC 62236-4, Railway signalling and telecommunications apparatus
Safety
EN 60950-1, IT equipment
FCC Part 15.105 Notice:This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equip­ment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of
the following measures:
… Reorient or relocate the receiving antenna
… Increase the separation between the equipment and receiver
… Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected
… Consult the dealer or an experienced radio/TV technician
for help.
4
6600-2204
Declaration of Conformity, TD-23 LV
Westermo Teleindustri AB
Declaration of conformity
The manufacturer
Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product
Leased Line V.23 Modem
Model
TD-23 LV
TD-23 LV (relay option)
Art no
3600-2001
3600-2051
is in conformity with the following EC directive(s).
No
Short name
2004/108/EC
Electromagnetic Compatibility (EMC)
References of standards applied for this EC declaration of conformity.
No
EN 55022
Title
Information technology equipment - Emission
EN 55024
Information technology equipment - Immunity
EN 61000-6-1
Electromagnetic compatibility – Immunity for residential
environments
Electromagnetic compatibility – Immunity for industrial
environments
Electromagnetic compatibility – Emission for residential
environments
Electromagnetic compatibility – Emission for industrial
environments
EN 61000-6-2
EN 61000-6-3
EN 61000-6-4
The last two digits of the year in which the CE marking was affixed:
Issue
2006
+A1:2007
1998
+A1:2001
+A2:2003
2007
2005
2007
2007
10
Pierre Öberg
Technical Manager
31th August 2010
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Org.nr/
Corp. identity number
Registered office
S-640 40 Stora Sundby
Sweden
016-428000
Int+46 16428000
016-428001
Int+46 16428001
52 72 79-4
5671-5550
556361-2604
Eskilstuna
6600-2204
5
Declaration of Conformity, TD-23 HV
Westermo Teleindustri AB
Declaration of conformity
The manufacturer
Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product
Leased line V.23 modem
Model
TD-23 HV
TD-23 HV (relay option)
Art no
3600-2101
3600-2151
is in conformity with the following EC directive(s).
No
Short name
2004/108/EC
2006/95/EC
Electromagnetic Compatibility (EMC)
Low Voltage (LVD)
References of standards applied for this EC declaration of conformity.
No
EN 55022
Title
Information technology equipment - Emission
EN 55024
Information technology equipment
EN 61000-6-1
Electromagnetic compatibility – Immunity for residential
environments
Electromagnetic compatibility – Immunity for industrial
environments
Electromagnetic compatibility – Emission for residential
environments
Electromagnetic compatibility – Emission for industrial
environments
Information technology equipment – Safety – General
requirements
EN 61000-6-2
EN 61000-6-3
EN 61000-6-4
EN 60950-1
- Immunity
The last two digits of the year in which the CE marking was affixed:
Issue
2006
+A1:2007
1998 +A1:2001
+A2:2003
2007
2005
2007
2007
2006
+ A1:2006
+ A11:2009
11
Pierre Öberg
Technical Manager
8th July 2011
6
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Org.nr/
Corp. identity number
Registered office
S-640 40 Stora Sundby
Sweden
016-428000
Int+46 16428000
016-428001
Int+46 16428001
52 72 79-4
5671-5550
556361-2604
Eskilstuna
6600-2204
Type tests and environmental conditions
Electromagnetic Compatibility
Phenomena
Test
Description
Test levels
ESD
EN 61000-4-2
Enclosure contact
± 6 kV
Enclosure air
± 8 kV
RF field AM
modulated
IEC 61000-4-3
Enclosure
6 V/m 80% AM (1 kHz) 2000 – 2700 MHz
10 V/m 80% AM (1 kHz), 80 – 1000 MHz
20 V/m 80% AM (1 kHz), 80 – 2000 MHz
RF field 900 MHz
ENV 50204
Enclosure
20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
Fast transient
EN 61000-4-4
Signal ports
± 2 kV
Power ports
± 2 kV
Signal ports unbalanced
± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced
± 2 kV line to earth, ± 1 kV line to line
Power ports
± 2 kV line to earth, ± 2 kV line to line
Signal ports
10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power ports
10 V 80% AM (1 kHz), 0.15 – 80 MHz
Surge
RF conducted
EN 61000-4-5
EN 61000-4-6
Power frequency
magnetic field
EN 61000-4-8
Enclosure
100 A/m, 50 Hz, 16.7 Hz & 0 Hz
Pulse magnetic field
EN 61000-4-9
Enclosure
300 A/m, 6.4 / 16 µs pulse
Voltage dips
and interruption
EN 61000-4-11
AC power ports
10, 20, 5000 ms interruption
10 & 500 ms, 30% reduction
200 ms, 60% reduction
Mains freq. 50 Hz
EN 61000-4-16
Signal ports
100 V 50 Hz line to earth
Mains freq. 50 Hz
SS 436 15 03
Signal ports
250 V 50 Hz line to line
Voltage dips
and interruption
EN 61000-4-29
DC power ports
10 & 100 ms, interruption
500 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
Radiated emission
EN 55022
Enclosure
Class B
FCC part 15
Conducted emission
Class B
EN 55022
AC power ports
Class B
FCC part 15
AC power ports
Class B
EN 55022
DC power ports
Class B
EN 60950
Signal port to other
isolated ports
2 kVrms 50 Hz 1 min
Power port to other
isolated ports
3 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min (@ rated power <60 V)
Operating
–25 to +70°C
Storage & Transport
–30 to +70°C
Operating
5 to 95% relative humidity
Storage & Transport
5 to 95% relative humidity
Altitude
Operating
2 000 m / 70 kPa
Service life
Operating
10 year
Dielectric strength
Environmental
Temperature
Humidity
Vibration
IEC 60068-2-6
Operating
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
Shock
IEC 60068-2-27
Operating
15 g, 11 ms
UL 94
PC / ABS
Flammability class V-1
Packaging
Enclosure
Dimension W x H x D
55 x 100 x 132 mm
Weight
Degree of protection
0.25 kg
IEC 529
Enclosure
IP 20
Cooling
Convection
Mounting
Horizontal on 35 mm DIN-rail
6600-2204
7
Description
TD-23 is designed to satisfy industry's demands on reliability and functionality in environments with high levels of interference.TD-23 communicates via a 2- or 4-wire leased line
according to the V.23 standard. Equipment with an RS-232 or RS-422/485 interface can be
connected and communicate point-to-point or in a multidrop application.The modem is
equipped with DIP-switches to set specific functions in hardware, for example, reception
sensitivity, output signal level, etc.
This is of particular importance as it allows each modem to be optimised according to
the line quality. A general calculation allows 16 units over a distance of up to 25 km
(15.5 miles).
TD-23 is intended for mounting on a 35 mm DIN-rail, where the modem is attached and
locked in a single action.
… Data rate 1200 bit/s (V.23)
… 2-wire (half duplex), 4-wire (full duplex)
… Number of multidrop points, 16 (typical value)
… Transmission distance up to 25 km (15.5 miles)
… Adjustable output signal level
… Adjustable reception sensitivity
… Transient protection on the line side
… AC-/DC-supply
… Galvanic isolation (line/supply)
… Optional relay output reflecting the transmitter carrier
8
6600-2204
Functional description
Block diagram
Modulated data
VCC
Line relay
2 or
4-wire
GND
Selectable
output level
Selectable
input sensitivity
Modem
Analog filter
Frequency
modulation
Frequency
demodulation
DIP-switches
Processor
Data
buffer
Data
buffer
Modem
chip
control
OR
GND
6600-2204
DSR RTS CTS DCD RD TD
TD RD
RS-232
RS-422/485
GND
Relay
output
9
Interface specifications
Power LV
Rated voltage
Operating voltage
Rated current
Rated frequency
Inrush current I²t
Startup current*
Polarity
Isolation to
Connection
Connector size
Shielded cable
Power HV
Rated voltage
Operating voltage
Rated current
Rated frequency
Inrush current I²t
Startup current*
Polarity
Isolation to
Connection
Connector size
Shielded cable
12 to 48 VDC 12 to 27 VAC
10 to 60 VDC 10 to 30 VAC
125 mA @ 12 VDC
50 mA @ 24 VDC
28 mA @ 48 VDC
125 mA @ 12 VAC
50 mA @ 24 VAC
25 mA @ 32 VAC
DC / AC 48 – 62 Hz
0.09 A²s
0.35 A peak
Polarity independent
RS-232 / RS-422/485 / Leased Line
Detachable screw terminal
0.2 – 2.5 mm² (AWG 24-12)
Not required
110 to 250 VDC
95 to 240 VAC
88 to 300 VDC
85.5 to 264 VAC
10 mA @ 110 VDC
7 mA @ 250 VDC
30 mA @ 95 VAC
23 mA @ 240 VAC
DC / 48 – 62 Hz
0.05 A²s
0.03 A peak
Polarity independent
RS-232 / RS-422/485 / Leased Line
Detachable screw terminal
0.2 – 2.5 mm² (AWG 24-12)
Not required
* Ska startup current beskrivas?
10
6600-2204
RS-422/485
Electrical specification
Data rate
Data format
Protocol
Retiming
Turn around time
Transmission range
Settings
Protection
Isolation to
Connection
Connector size
Shielded cable
RS-232
lectrical specification
Data rate
Data format
Protocol
Retiming
Transmission range
Isolation to
Connection
Connector size
Shielded cable
Conductive housing
E IA RS-485
2-wire or 4-wire twisted pair
300 bit/s – 1200 bit/s
7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits;
Σ 9-12 bits
Transparent
No
4.2 ms (half duplex)
≤ 1200 m, depending on data rate and cable type (EIA RS-485)
120 Ω termination and failsafe biasing 680 Ω
Installation Fault Tolerant (up to ±60 V)
Power / Leased Line
Detachable screw terminal
0.2 – 2.5 mm² (AWG 24 – 12)
Not required*
EIA RS-232
300 bit/s – 1200 bit/s
7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits;
Σ 9-12 bits
Transparent
No
15 m
Power / Leased Line
9-pin D-sub female (DCE)
or Detachable screw terminal (DCE)
0.2 – 2.5 mm² (AWG 24 – 12)
Not required*
Isolated to all other housings
* Railway installation close to the rails.
For a cable located inside 3 m boundary and connected to this port, the use of shielded cable is recommended,
this is to minimise the risk of interference. The cable shield should be properly connected (360°) to an earthing
point within 1 m from this port. This earthing point should have a low impedance connection to the conductive
enclosure of the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure should be
connected to the earthing system of an installation and may be directly connected to the protective earth.
6600-2204
11
Relay (optional)
Rated voltage
Operating voltage
Contact rating
Contact resistance
Transmission range
Function
Isolation to
Connection
Connector size
Shielded cable
Leased Line
Electrical specification
Data rate
Transmission level
Sensitivity reseption
Protocol
Turn around time
Transmission range / Budget
Protection
Isolation to
Connection
Connector size
Shielded cable
12
Up to 48 VDC
Up to 60 VDC
50 mA @ 48 VDC
8Ω
≤ 3 m, depending on data rate and cable type
The output follows the transmit carrier, I.e. output shorted
when carrier is ON.
Power, Leased Line, RS-232, RS-485/422
Detachable screw terminal
0.2 – 2.5 mm² (AWG 24 – 12)
Not required
2- or 4-wire Leased Line
300 bit/s – 1200 bit/s
+3, –3, –6, –9, –10, –12, –13, –15 dBm
Transmision levels above –9 dBm are not allowed on
PTT networks only on private wires
–45, –33, –27, –23 dBm
V23hdx, V23fdx
33 ms (half duplex)
30dB
Installation Fault Tolerant (up to ±60 V)
Power / RS-232 / RS-422/485
Detachable screw terminal
0.2 – 2.5 mm² (AWG 24 – 12)
Not required
6600-2204
Location of Interface ports, LED’s and DIP-switches
TD-23 HV
RS-422/485
Product
marking
9-pos. Direction* Description
No 9
In
R+ (A’) Receive
RS-422/485 4-wire
R+
No 8
In
R– (B’) Receive
RS-422/485 4-wire
R–
Out
T+ (A) Transmit
RS-422/485 4-wire
No 7
In/Out
Out
No 6
In/Out
T+
T+/R+ (A/A’) Transmit/Receive
RS-422/485 2-wire
T– (B) Transmit
RS-422/485 4-wire
T–
T–/R– (B/B’) Transmit/Receive
RS-422/485 2-wire
Relay (optional)
Leased Line
Fore details,
se below
Position Direction* Description
No. 1
Out
Normal open
No. 2
Out
Common
RS-232 (DTE)
Fore details, se below
Power connection HV
Fore details, se below
RS-232 (DTE)
Position
D-sub
Screw
terminal
No. 1
D-sub
description
Direction* Description
Out
Data Carrier Detect (DCD)
No. 2
No. 4
Out
Received Data (RD)
No. 3
No. 3
In
No. 4
NC
No. 5
No. 5
–
Transmitted Data (TD)
Data Terminal Ready (DTR)
No. 6
Out
Data Set Ready (DSR)
No. 7
In
Request To Send (RTS)
No. 8
Out
Clear To Send (CTS)
No. 9
NC
Ring Indicator (RI)
Pos.
Direction*
Description
L
In
AC: Live
DC: +Voltage
In
AC: Neutral
DC: –Voltage
–
Not used
Product
marking
* Direction relative this unit. NC = Not Connected
6600-2204
6
7
8
9
Leased Line
Power connection HV
N
1
2
3
4
5
Signal Ground (SG)
Pos.
No. 1
Direction*
Out
In/Out
No. 2
Out
In/Out
Description
Product
marking
4-wire Transmit
2-/4-wire
Receive/ Transmit
4-wire Transmit
TX
2-/4-wire
Receive/ Transmit
No. 3
In
4-wire Receive
No. 4
In
4-wire Receive
RX
13
Location of Interface ports, LED’s and DIP-switches
TD-23 LV
RS-422/485
Product
marking
9-pos. Direction* Description
No 9
In
R+ (A’) Receive
RS-422/485 4-wire
R+
No 8
In
R– (B’) Receive
RS-422/485 4-wire
R–
Out
T+ (A) Transmit
RS-422/485 4-wire
No 7
In/Out
Out
No 6
In/Out
T+
T+/R+ (A/A’) Transmit/Receive
RS-422/485 2-wire
T– (B) Transmit
RS-422/485 4-wire
T–
T–/R– (B/B’) Transmit/Receive
RS-422/485 2-wire
Relay (optional)
Leased Line
Fore details,
se below
Position Direction* Description
No. 1
Out
Normal open
No. 2
Out
Common
RS-232 (DTE)
Fore details, se below
Power connection LV
Fore details, se below
RS-232 (DTE)
Position
D-sub
Screw
terminal
D-sub
description
Direction* Description
No. 1
Out
Data Carrier Detect (DCD)
No. 2
No. 4
Out
Received Data (RD)
No. 3
No. 3
In
No. 4
No. 5
NC
No. 5
–
Transmitted Data (TD)
Data Terminal Ready (DTR)
No. 6
Out
Data Set Ready (DSR)
No. 7
In
Request To Send (RTS)
No. 8
Out
Clear To Send (CTS)
No. 9
NC
Ring Indicator (RI)
Pos.
Direction*
Description
No. 1
In
AC: Neutral
DC: –Voltage
In
6
7
8
9
Leased Line
Power connection LV
No. 2
1
2
3
4
5
Signal Ground (SG)
Product
marking
AC: Line
DC: +Voltage
Pos.
No. 1
Direction*
Out
In/Out
No. 2
Out
In/Out
* Direction relative this unit. NC = Not Connected
14
Description
Product
marking
4-wire Transmit
2-/4-wire
Receive/ Transmit
4-wire Transmit
TX
2-/4-wire
Receive/ Transmit
No. 3
In
4-wire Receive
No. 4
In
4-wire Receive
RX
6600-2204
LED Indicators
LED
Status
Description
PWR
ON
In service
OFF
Out of service
ON
Data transmitted on the RS-232 or RS-485 port
OFF
No data transmitted on the RS-232 or RS-485 port
ON
Data received on the RS-232 or RS-485 port
OFF
No data received on the RS-232 or RS-485 port
ON
RTS signal active on the RS-232 port
OFF
RTS signal inactive on the RS-232 port
ON
CTS signal active on the RS-232 port
OFF
CTS signal inactive on the RS-232 port
ON
DCD signal active on the RS-232 port
OFF
DCD signal inactive on the RS-232 port
Power
RD
Receive data
TD
Transmit data
RTS
Request
to send
CTS
Clear to send
DCD
Data carrier
detect
6600-2204
PWR
RD
TD
RTS
CTS
DCD
15
DIP-switch settings
!
Before DIP-switch settings:
Prevent damage to internal electronics from electrostatic discharges (ESD)
by discharging your body to a grounding point (e.g. use of wrist strap).
NOTE DIP-switch alterations are only effective after a power on.
S1
S2
S3
S1 DIP-switch
Selection of transmission level
ON
1 2 34 56 78
ON
3 dBm
ON
ON
1 2 34 56 78
–3 dBm
ON
1 2 34 56 78
1 2 34 56 78
ON
–9 dBm
1 2 34 56 78
1 2 34 56 78
–13 dBm
ON
–10 dBm
1 2 34 56 78
–15 dBm
ON
–6 dBm
1 2 34 56 78
–12 dBm
Selection of transmission level specifies the maximum output power level. The maximum value is 3 dBm. By
selecting the higher transmission levels communication over longer distances can be achieved, but the noise
and disturbance levels will increase. We recommend that you try your system with the factory default setting
first. If disturbances are detected (faulty characters or other errors) decrease the power level step by step.
If the transmission fails because of a weak signal the transmission level can be increased step by step until a
satisfactory transmission quality is achieved. Please note that levels above –9 dBm are not allowed on PTT
networks and can only be used on private wires!
16
6600-2204
S1 DIP-switch
Selection of minimum level detection DCD
ON
1 2 34 56 78
ON
–45 dBm
ON
1 2 34 56 78
1 2 34 56 78
–27 dBm
ON
–33 dBm
1 2 34 56 78
–23 dBm
Selection of minimum level, DCD detection specifies the minimum power level the receiver can handle. With the
receiver having a dynamic range of 30 dBm, this means that with the level set to –15 dBm the TD-23 will pick up
signals in the range –15 dBm to –45 dBm. We recommend that you try your network with the factory settings.
If disturbances are detected (faulty characters or other errors) decrease the level step by step. If there is no
communication because of a weak signal the receiver sensitivity can be increased step by step until satisfactory
transmission quality is achieved.
S1 DIP-switch
2 or 4 Wire Line side
ON
1 2 34 56 78
ON
4-wire
1 2 34 56 78
2-wire
S1 DIP-switch
Carrier active using RTS or incoming data
ON
1 2 34 56 78
ON
RTS
1 2 34 56 78
ON
Incoming data
1 2 34 56 78
Permanent carrier
If the DTE uses the control signal- (RTS) the RTS signal is used to activate the transmitter. If the DTE does not
control RTS or if RS-485 is used then the transmitter is activated by incoming data. In this case the data is buffered
in the TD-23 while the carrier is established. By setting RTS always active a permanent carrier will be established.
This is the typical setting for a full duplex 4-wire communication.
6600-2204
17
S2 DIP-switch
Selection of 2/4 wire RS-422/485 side
ON
1 2 34 56 78
ON
2-wire
1 2 34 56 78
ON
4-wire
1 2 34 56 78
Deactivate
RS-422/485
All RS-422/485 lines should be terminated at the end-points. The RS-422/485 interface also has a fail-sate circuit
which forces a non-active line into idle state.
S2 DIP-switch
RTS-CTS delay, 23 or 60 ms
ON
1 2 34 56 78
ON
60 ms
1 2 34 56 78
23 ms
When a 23 ms delay is chosen, the modem can handle the normal RTS-CTS behavoiur as well as handle that TxD
data is received before the 23 ms delay has elapsed. If TxD data is received before the modem has activated the
CTS signal, the data is buffered. The time the data is delayed depends on how long after the activation of the RTS
the first data bit is received. If a delay of 60 ms is chosen , all data received from the DTE interface (TxD) before
the modem has activated the CTS signal is ignored.
S2 DIP-switch
Termination of the line
ON
1 2 34 56 78
No
termination
ON
1 2 34 56 78
Termination
The line should be terminated at the end-points.
S2:6 Not used.
S2 DIP-switch
Activity timer
ON
1 2 34 56 78
ON
Off
1 2 34 56 78
On 1 min
The use of the timer is a fail safe to ensure that a faulty unit connected to the modem will not block the line.
S2:6 Not used.
S2 DIP-switch
Filtering of DCD and RXD
ON
ON
1 2 34 56 78
Off
1 2 34 56 78
On
If this is enabled, RxD is delayed (buffered) 6 ms in order to avoid garbage characters when carrier is deactivated.
The turn around time for the modem from sending to receiving on the line is 10 ms if this filter is enabled.
18
6600-2204
S3 DIP-switch
RS-422/485 termination
ON
1 2 34
No termination
or failsafe
ON
1 2 34
2-wire termination with
failsafe;T+/R+ and T– /R–
ON
1 2 34
4-wire termination with failsafe;
R+ and R–
Factory settings
ON
1 2 34 56 78
6600-2204
ON
ON
S1
1 2 34 56 78
S2
1 2 34
S3
19
RS-422/485 general advice
4-wire termination
R+
R–
T+
T–
R– R+ T– T+ R– R+ T– T+
TD-23
B’ A’ B
A
=Termination
Slave unit
Slave unit
Slave unit
2-wire termination
T+
T–
Max 0.3 metre
T- T+
TD-23
T- T+
B
A
=Termination
Slave unit
Slave unit
Slave unit
Termination recommendations
The RS-422/485 line must be terminated. In the TD-23 the termination is combined with
fail-safe functionality. For that reason it is important that the termination is used not to
get undefined states when the bus is in three state condition.
… At 2-wire RS-485 both ends shall be terminated at the other most units of the bus.
… At 4-wire RS-485 both pairs shall be terminated at both ends.
… At 4-wire RS-422 it is only necessary to terminate the receivers.
RS-422/485 connection pins can be differently named. For some brands the T+
corresponds to A, but other brands might use some other naming convention.
If a unit does not work it can help to swap A and B.
20
6600-2204
Mounting
This unit should be mounted on 35 mm DIN-rail, which is
horizontally mounted inside an apparatus cabinet, or similar. Snap on mounting, see figure.
CLICK!
Cooling
This unit uses convection cooling. To avoid
obstructing the airflow around the unit, use the
following spacing rules. Minimum spacing 25 mm
(1.0 inch) above /below and 10 mm (0.4 inches)
left /right the unit. Spacing is recommended for
the use of unit in full operating temperature
range and service life.
10 mm *
(0.4 inches)
25 mm
* S pacing (left/right) recommended for
full operating temperature range
25 mm
Removal
Press down the black support at the back of the unit
using a screwdriver, see figure.
6600-2204
21
Application examples
RS-232
RS-232
RS-232, 2-wire connection
2-wire twisted pair
DIP-switch setting for both units
S1
ON
1 2 3 4 5 6 7 8
22
S2
ON
1 2 3 4 5 6 7 8
S3
ON
1 2 3 4
6600-2204
Multidrop application
S1
ON
1 2 3 4 5 6 7 8
S2
RS-485
ON
1 2 3 4 5 6 7 8
S3
ON
1 2 3 4
Master
S1
ON
S1
1 2 3 4 5 6 7 8
S2
1 2 3 4 5 6 7 8
ON
S2
1 2 3 4 5 6 7 8
S3
ON
ON
1 2 3 4 5 6 7 8
ON
S3
1 2 3 4
ON
1 2 3 4
RS-232
S1
ON
1 2 3 4 5 6 7 8
S2
ON
1 2 3 4 5 6
RS-422
S1
ON
S1
1 2 3 4 5 6 7 8
S2
1 2 3 4 5 6 7 8
ON
S2
1 2 3 4 5 6 7 8
S3
ON
ON
1 2 3 4 5 6 7 8
ON
S3
1 2 3 4
ON
1 2 3 4
RS-232
S1
RS-232
ON
1 2 3 4 5 6 7 8
S2
ON
1 2 3 4 5 6 7 8
S3
ON
1 2 3 4
6600-2204
23
Westermo Teleindustri AB • SE-640 40 Stora Sundby, Sweden
Phone +46 16 42 80 00 Fax +46 16 42 80 01
E-mail: info@westermo.com
Westermo Web site: www.westermo.com
United Kingdom
Westermo Data Communications Ltd
Talisman Business Centre • Duncan Road
Park Gate, Southampton • SO31 7GA
Phone: +44(0)1489 580‑585 • Fax.:+44(0)1489 580586
E-Mail: sales@westermo.co.uk
Germany
Westermo Data Communications GmbH
Goethestraße 67, 68753 Waghäusel
Tel.: +49(0)7254-95400-0 • Fax.:+49(0)7254-95400-9
E-Mail: info@westermo.de
France
Westermo Data Communications S.A.R.L.
9 Chemin de Chilly 91160 CHAMPLAN
Tél : +33 1 69 10 21 00 • Fax : +33 1 69 10 21 01
E-mail : infos@westermo.fr
Singapore
Westermo Data Communications Pte Ltd
2 Soon Wing Road #08-05
Soon Wing Industrial Building
Singapore 347893
Phone +65 6743 9801 • Fax +65 6745 0670
E-Mail: sales@westermo.com.sg
North America
Westermo Data Communications
939 N. Plum Grove Road, Suite F
Schaumburg
Chicago
Phone: +1 847 619 6068
Fax: +1 847 619 66 74
E-mail: info@westermo.com
Taiwan
Westermo Data Communications Co
F2, No. 188, Pao-Chiao Rd.
Shing-Tien City
Taipei 23145
Phone:+886 2 8911 1710
E-mail: info@westermo.com
Westermo Teleindustri AB have distributors in several countries, contact us for further information.
REV.G 6600-2204 2011-08 Westermo Teleindustri AB, Sweden – A Beijer Electronics Group Company
Sales Units
Sweden
Westermo Data Communications AB
Svalgången 1
SE-724 81 Västerås
Phone: +46 (0)21 548 08 00 • Fax: +46 (0)21 35 18 50
E-Mail: info.sverige@westermo.se