ATEN IC485SN User manual

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FCC Information
FEDERAL COMMUNICATIONS COMMISSION INTERFERENCE
STATEMENT: This equipment has been tested and found to comply
with the limits for a Class B digital service, pursuant to Part 15 of the
FCC rules These limits are designed to provide reasonable
protection against harmful interference in a residential installation
Any changes or modifications made to this equipment may void the
user’s authority to operate this equipment This equipment generates,
uses, and can radiate radio frequency energy 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
FCC Caution: Any changes or modifications not expressly approved
by the party responsible for compliance could void the user's authority
to operate this equipment
This device complies with Part 15 of the FCC Rules Operation is
subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation
 K C C Statement
RoHS
This product is RoHS compliant
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IC-485SN User Manual
Online Regist ation
You can register your product at our online support center:
Online Suppo t
Inte national
No th Ame ica
International http://support aten com
Email Support support@aten com
Online
Support
Technical Support http://support aten com
Troubleshooting
Documentation
Software Updates
http://www aten com
Email Support support@aten-usa com
Online
Technical
Support
Troubleshooting
Documentation
Software
Updates
http://www aten-usa com/support
Telephone Support 1-888-999-ATEN ext 4988
1-949-428-1111
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Telephone Suppo t
For telephone support, call this number:
International 886-2-8692-6959
China 86-400-810-0-810
Japan 81-3-5615-5811
Korea 82-2-467-6789
North America 1-888-999-ATEN ext 4988
1-949-428-1111
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Package Contents
The IC-485SN package contains the following items:
 1 IC-485SN Bidirectional Converter
 1 User Manual
Check to make sure that all the components are present and that
nothing got damaged in shipping If you encounter a problem,
contact your dealer
Read this manual thoroughly and follow the installation and
operation procedures carefully to prevent any damage to the unit,
and/or any of the devices connected to it
*Features may have been added to the IC-485SN since this
manual was printed Please visit our website to download the
most up-to-date version of the manual
Copyright © 1998-2023 ATEN
®
International Co , Ltd
Released: 2023-05-30
ATEN and the ATEN logo are trademarks of ATEN International Co , Ltd All rights
reserved All other trademarks are the property of their respective owners
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O er iew
Although RS-232 serial ports are found on almost every
computer, because of their slow transmission speeds, limited
range, and limited networking capabilities, they are not an
effective solution for industrial strength long distance
communications systems
Systems based on the RS-422 and RS-485 standards, on the
other hand, are not subject to the RS-232 limitations because
they utilize different voltage lines for the data and control signals
The IC-485SN Converter is a bidirectional converter that
transparently converts RS-232 signals to RS-422 / RS-485
signals (and vice versa) The IC-485SN provides Point-to-Point;
Multidrop; and Simplex operations over distances of up to 1200
m (4000 ft ), thus permitting the creation of reliable long distance
data communications systems using standard computer
hardware
Features
 Data Transmission Controlled by the RTS Signal
 DCE / DTE selectable
 Point to Point/Multidrop and Simplex/Duplex Operating
Modes
 External Power Not Required - Power Spplied by the RS-232
interface
 Compact size
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Switch Configuration
The IC-485SN is configured by setting two slide switches SW1
is used to select the Device Mode; SW2 is used to select the
Transmitting and Receiving Mode, as shown in the table below:
Position SW1 SW2
1 DCE TxON, RxON
2 DTE TxRTS, RxON
3 TxDTR/RTS,
RxDSR/ON
RS-232C
DB-25 Female
Terminal Block
SW1
SW2
RJ-11 Phone Jack
Power Jack
Connecter
Connecter
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Explanations of the SW1 and SW2 terns are given in the table
below:
Te m Meaning
DCE DCE means Date Communication Equipment; if
the IC-485SN is going to be plugged into a DTE
device, the IC-485SN must be set to DCE
DTE DTE means Date Terminal Equipment; if the IC-
485SN is going to be plugged into a DCE device,
the IC-485SN must be set to DTE
TxON, RxON This setting is used in Point-to-Point operations,
in which the unit is always in Transmitting and
Receiving Mode See the TxON, RxON
schematic for details
TxRTS, RxON This setting is used in Multidrop operations, in
which the unit is always in Receiving Mode, and
is in Transmitting Mode only when the RTS
signal is high See the TxON, RxON schematic
for details
TxDTR/RTS,
RxDSR/ON
This setting is used in Multidrop operations, in
which the unit is always in Receiving Mode, and
is in Transmitting Mode only when the RTS
signal is high See the TxON, RxON schematic
for details
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Operating Modes
The IC-485SN supports three operating modes: Point-to-Point;
Multidrop; and Simplex Point-to-Point and Multidrop can be
configured for Full or Half Duplex Each of the operating modes
is explained below
Point-to-Point
A Point-to-Point configuration is one in which two devices,
located at two different places are linked for communication by a
pair of IC-485SN units There are two configurations: Point-to-
Point Full Duplex, and Point-to-Point Half Duplex
1 Point-to-Point 4 Wi e Full Duplex
 Point-to-Point Full Duplex uses reverse four wire cabling,
as shown in the diagram below
 For both IC-485SN units, set SW1 to DCE or DTE
depending on what type of device the IC-485SN will plug
into (if it will plug into a DCE device, configure it for DTE,
and vice versa)
 For both IC-485SN units, set SW2 to TxON, RxON
4
2
DB-25 DB-25 RJ-11 RJ-11
Connect
to PC#1’s
Com Port
5
2
3
5
4
3
TX+
TX-
RX+
RX-
TX+
TX-
RX+
RX-
Connect
to PC#1’s
Com Port
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2 Point-to-Point 4 Wi e Half Duplex
 Point-to-Point Half Duplex uses straight through four wire
cabling, as shown in the diagram below
 For both IC-485SN units, set SW1 to DCE or DTE
depending on what type of device the IC-485SN will plug
into (if it will plug into a DCE device, configure it for DTE,
and vice versa)
 For both IC-485SN units, set SW2 to TxDTR/RTS,
RxDSR/ON
Note: TxDTR/RTS, RxDSR/ON transmitting/receiving mode,
involves a straight-through Data+, Data-, Busy+,
Busy- wiring scheme See the TxDTR/RTS, RxDSR/
ON schematic for details
4
2
DB-25 DB-25
RJ-11 RJ-11
Connect
to PC#1’s
Com Port
5
2
3
5
4
3
DATA+
DATA-
BUSY+
BUSY-
DATA+
DATA-
BUSY+
BUSY-
Connect
to PC#1’s
Com Port
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Multidrop
A Multidrop configuration is one in which more than two devices
are linked for communication using several IC-485SN units
Either a two-to-one RJ-11 adapter or a combination of the
terminal block and the RJ-11 socket can be used to connect the
IC-485SN units to each other
One of the devices that one of the IC-485SNs connects to is
designated as the Primary device All the remaining devices that
the rest of the IC-485SNs connect to are designated as
Secondary devices There are two configurations: Multidrop Full
Duplex, and Multidrop Half Duplex
1 Multid op 4 Wi e Full Duplex
 Multidrop Full Duplex uses reverse four wire cabling to link
all the connected IC-485SN units:
 For all IC-485SN units, set SW1 to DCE or DTE depending
on what type of device the IC-485SN will plug into (if it will
plug into a DCE device, configure it for DTE, and vice
versa)
 For the Primary unit, set SW2 to TxON, RxON
 For all Secondary units, set SW2 to TxRTS, RxON
Primary
T+
T
-
R
-
R+
Secondary 1
R+
R -
T -
T+
Secondary 2
R+
R -
T -
T+
.
.
.
Secondary 31
PC1
COM1/
COM2
PC2
COM1/
COM2
PC3
COM1/
COM2
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2. Multid op Half Duplex
 Multidrop Half Duplex uses straight-through four wire
cabling, to link all the connected IC-485SN units:
 For all IC-485SN units, set SW1 to DCE or DTE depending
on what type of device the IC-485SN will plug into (if it will
plug into a DCE device, configure it for DTE, and vice
versa)
 For all IC-485SN units set SW2 to TxDTR/RTS, RxDSR/
ON
Note: 1 Only one device at a time can talk on the bus (RTS ON)
During that time, the other devices must remain silent
(RTS OFF) See the explanation regarding TxDTR/
RTS, RxDSR/ON in the Switch Configuration section
2 TxDTR/RTS, RxDSR/ON transmitting/receiving mode,
involves a straight-through Data+, Data-, Busy+,
Busy- wiring scheme See the TxDTR/RTS, RxDSR/
ON schematic
DATA+
DATA -
BUSY+
BUSY -
DATA+
DATA -
BUSY+
BUSY -
DATA+
DATA -
BUSY+
BUSY -
DATA+
DATA -
BUSY+
BUSY -
Connect
to PC#1's
COM port
Connect
to PC#2's
COM port
Connect
to PC#3's
COM port
Connect
to PC#4's
DB-25
RJ-11
RJ-11
RJ-11
RJ-11 DB-25
DB-25 DB-25
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
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Simplex
A Simplex configuration is one in which more than two devices
are linked for communication using several IC-485SN units in a
manner similar to Multidrop The difference is that in a Simplex
configuration, the Primary device can only talk, and the
Secondary devices can only listen
 Simplex uses reverse two wire cabling to link all the
connected IC-485SN units, as shown in the figure below:
 For all IC-485SN units, set SW1 to DCE or DTE depending
on what type of device the IC-485SN will plug into (if it will
plug into a DCE device, configure it for DTE, and vice
versa)
 For all of the units (Primary and Secondary), set SW2 to
TxON, RxON
Primary
T+
T
-
R
-
R+
Secondary 1
R+
R -
T -
T+
Secondary 2
R+
R -
T -
T+
Secondary 3
R+
R -
T -
T+
:
:
Secondary 31
PC1
COM1/
COM2
PC2
COM1/
COM2
PC3
COM1/
COM2
PC4
COM1/
COM2
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Installation
1 Set each IC-485SN's configuration switches according to the
information provided in the Switch Configuration and
Operating Modes sections
2 Plug the IC-485SN's DB-25 female connector into the
computer's RS-232C port
3 Connect the IC-485SN units to each other:
 Use two or four wire twisted pair cable in a reverse or
straight through configuration according to the information
provided in the Switch Configuration and Operating Modes
sections
 You may use either the RJ-11 telephone socket, or wire
directly to the Terminal Block (See the Terminal Block Pin
Assignments table for pin assigment details ) If you are
daisy chaining units, you will need to use either a two-to-
one RJ-11 adapter, or a combination of the Terminal Block
and the RJ-11 socket
Note: 1 When tightening the terminal connector screws it is
recommended to use a Phillips PH1 Screwdriver
2 Over-tightening the terminal connector screws may
result in damage to your IC-485SN and difficulty
loosening the screws
4 Power on the computers The units are now ready for
operation
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Appendix
Terminal Block Pin Assignments
DCE / DTE Connection Table
Pin Assignment
1 Transmit +V
2 Transmit -V
3 Receive -V
4 Receive +V
DCE
DB-9
2
3
8
7
4
6
5
DTE
DB-9
3
2
7
8
6
4
5
DCE
DB-25
3
2
5
4
20
6
7
DTE
DB-25
2
3
4
5
6
20
7
DCE
DB-25
2
3
4
5
6
20
7
DTE
DB-25
3
2
5
4
20
6
7
Tx Rx
Rx Tx
RTS CTS
CTS RTS
DSR DTR
DTR DSR
GND
Cable
25/25 or
9/25 pin
IC-485ASIDevice's Connector Pin #
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SW2 Pin Assignment Schematics
TxON, RxON:
TxRTS, RxON:
1
2
3
4
Tx+
Tx-
Rx-
Rx+
Tx2
Rx3
RTS
CTS
DTR
DSR
1
2
3
4
Tx+
Tx-
Rx-
Rx+
Tx
Rx
RTS
CTS
DTR
DSR
TX
RX
DCE
DTE
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TxDTR/RTS, RxDSR/ON:
1
2
DATA +
DATA -
RTS
CTS
DTR
TX
RX
DCE
DTE
DCE
DTE
3
4
BUSY -
BUST +- DSR
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Troubleshooting
Specifications
Symptom Action
Data Transmission
Failure
Check that the IC-485SN units are securely
plugged into the computers' serial ports
Check that the cables are properly set up and
properly connected
Check that SW1 and SW2 are set properly
Data Loss or Error Check that the Data Rate and Data Format are
the same for all devices
Power Consumption 6 51 mA
Data Rate Up to 100 Kbps under 1 2 Km (4000 ft )
Connectors • 1 x DB-25 female (for RS-232)
• 1 x 4 Post Terminal Block (for RS-422 / RS-485)
• 1 x RJ-11 Socket (for RS-422 / RS-485)
Function
Switches
SW1 DCE / DTE Select
SW2 • TxON, RxON
• TxRTS, RxON
• TxDTR/RTS, RxDSR/ON
Housing Plastic
Weight 60 g
Dimensions (L x W x
H)
54 x 74 5 x 18 5 mm
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Limited Wa anty
ATEN warrants its hardware in the country of purchase against
flaws in materials and workmanship for a Warranty Period of two
[2] years (warranty period may vary in certain regions/countries)
commencing on the date of original purchase This warranty
period includes the LCD panel of ATEN LCD KVM switches
Select products are warranted for an additional year (see A+
Warranty for further details) Cables and accessories are not
covered by the Standard Warranty
What is cove ed by the Limited Ha dwa e Wa anty
ATEN will provide a repair service, without charge, during the
Warranty Period If a product is detective, ATEN will, at its
discretion, have the option to (1) repair said product with new or
repaired components, or (2) replace the entire product with an
identical product or with a similar product which fulfills the same
function as the defective product Replaced products assume the
warranty of the original product for the remaining period or a
period of 90 days, whichever is longer When the products or
components are replaced, the replacing articles shall become
customer property and the replaced articles shall become the
property of ATEN
To learn more about our warranty policies, please visit our
website:
http://www aten com/global/en/legal/policies/warranty-policy
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MEMO
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