Converters: RS232 to RS422/ RS485
I-Loop / Fibre Optic / Radio / Ethernet
JED - ATEN - AIC - ADAM Converters  Short Haul Modems

Prices (Australian dollars) do not include GST and may change without notice.  

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This page:   Converters:  RS232  to   RS422/ RS485    I-Loop      Fibre Optic      Ethernet
                       RS232 to RS232 Isolator

RS485 is a two wire (twisted pair) network used for party lines where several RS485 devices are attached to the same line in daisy chain style (effectively in parallel). The RS485 lines can theoretically extend for 1.2km.
Only one device can be in transmit mode at a particular time, so the remainder must be in receive mode.
Up to 32 devices can be attached to an RS485 line without a Repeater.
Some means is required to turn on the transmit mode in a device prior to sending.

RS485 termination: The extreme ends of the RS485 line should be terminated with a 120 ohm resistor (i.e. 2 only). RS485 networks should not use a "star" configuration with unterminated stubs. Stations should be close to or on the line. This will prevent reflections causing problems at high speeds.
JED converters have link selectable termination resistors. ADAM converters have a positions for terminating resistors.

RS485/RS422 Receiver Biasing: the receiver can be fed with a small bias current which applies the space condition if the line is broken or not actively driven.
The RS232 send line is then in the space or stop condition also (-ve). JED Converters have a link for setting this.

RS422 has separate dedicated pairs of wires for each direction of transmission between only two devices up to 1.2km apart.
Usually there are just two pairs (send & receive), so data flow must be controlled by XON & XOFF codes.
Hardware handshake would require a third and maybe a fourth pair.

DTE: Data Terminal Equipment,             e.g. a PC:        the transmit pin is pin 2 on a DB25 connector, or pin 3 on a DB9 connector.
DCE: Data Communications Equipment, e.g. a modem:  the transmit pin is pin 3 on a DB25 connector, or pin 2 on a DB9 connector.

If the RS422/485 side of a converter is sending signals to a distant location, an isolated converter is recommended.
This avoids ground loops which can cause data errors if the ground potentials are different at each end of the long line, and gives more tolerance to electrical interference..

Serial cards (1, 2, 4, 8 or more ports, RS232, RS422, RS485, PCMCIA, etc) for plugging inside a PC: click here

M9131   RS232 to RS232 Isolator Box - Optical Isolation

The RS232 to RS232 Isolator Box with optical isolation allows the signals to be isolated from each other up to 1000V.
There are 3 LED indicators corresponding to Tx, Rx, and power signals.
A 9V, 500mA power adapter is provided in the package.

The earth pins (pin 1) are not joined between the two ends.
Maximum data rate: "It can handle 460800 bps, but it will not be stable. We do not suggest user to use this baudrate."

There is one male DB25M and one female DB25F connector in the box, the signal assignments are shown below:

Pin #   Signal Name     RS232 Signal Name    Direction
1    Ground (GND)                  AA           Common
2    Transmit Data (TxD)         BA            Output
3    Receive Data (RxD)           BB           Input
4    Request to Send (RTS)       CA          Output
5    Clear to Send (CTS)           CB           Input
6    Data Set Ready (DSR)        CC           Input
7    Signal Ground (SG)            AB           Common
8    Data Carrier Detect (DCD)  CF           Input
20  Data Terminal Ready (DTR) CD         Output

M9131   RS232 to RS232 Photo Isolator Box:   $247+GST

IC-485  RS232 to RS485/422Converter  

                IC485S     -      IC-485SN    -    Bidirectional
Converts from   RS-232    to    RS-485 or RS-422.                zmx  udq  lhl lhb
IC485S & IC485SN do not have isolation, so are suitable for short distances..
• In RS485 mode, data transmission direction must be controlled by the RTS Signal (i.e. not automatic).
           For Automatic direction control see J995X or ADAM-4520 below.
• DCE/DTE Selectable
• Point to Point, Multidrop, and Simplex/Duplex Link Selectable
• Four Wire Full Duplex / Two Wire Half Duplex      • Very Compact Size

• Monitor Mode on IC-485S         Data & prices: click here 

Data transfer can take place at up to 1200 metres over four or two wire cable for full or half duplex, respectively.
In RS485 (2-wire) mode up to 32 receivers can be set up in a multidrop installation, making for a cost effective network configuration.
The RS485 side remains in receive mode until switched to transmit mode by Request to Send (RTS) on the RS232 side.
IC-485S and IC-485SN can obtain power from the RS232 port.  Mains adaptor is included for better line driving capability.
IC-485SI (isolated version) requires the mains adaptor.
Warranty: 12 months.  ATEN   Data & prices: click here 

ADAM Module Converters

Various converters, with isolation, see further down this page: click here

ADAM-4520   RS232 to RS422/485
ADAM-4510S Repeater, isolated
ADAM-4521   RS232 to RS485/422, Addressable
ADAM-4541   Fibre Optic to RS-232/422/485 Converter
ADAM-4561   USB   to       RS232/RS422/RS485

Ethernet to RS232/RS422/RS485 Serial to Ethernet Converters:   ADAM-4570  ADAM-4571  ADAM-4577  ADAM-4579
    Jump to details on these ADAM 45xx : click here  (different page)

JED Serial Line Converters

J995X   RS232C to RS422/RS485, Auto-Tx-On, Isolated

Opto-isolated (1400VAC), bidirectional, (2 or 4 wire). Works reliably up to 115.2kb/sec.
When configured to RS485 mode, the RS485 end normally sits in receive mode, and switches automatically to transmit mode when a character enters the RS232 port.
The baud rate can be set internally with jumpers to ensure that the transmitt mode stays on for long enough for all the bits in the character to be transmitted.
The RS232 side is normally supplied with DB9F on a 45mm ribbon cable, DCE connection (optionally, 25-pin DCE or DTE can be provided).
This side is normally powered from the host (by rectification of the control lines - OK with PC RS232 port).
A pair of screw terminals is provided to power this side if there are problems,
   e.g. if only 3 wires are being used (RX, TX, Gnd) and there is no +ve voltage from host (9 to 12VDC required).
Two internal LEDs shows transmit and receive data. The RS232 side is opto-coupled to the RS422/485 side.

The RS422/485 side has screw terminal connections inside the end of the case, and to preserve the isolation from the RS232 end of the converter, must be powered with its own isolated 9VDC power supply or mains adaptor (e.g. PAK9 below).
RS485 termination and RS485/RS422 receiver biasing jumpers (see above) are provided.
Another jumper can be installed to disable the receiver drive to the RS232 line during an RS 485 transmission.
Plastic Case: 25x50x100mm. Power supply not included.    J995X: $175+GST

External power supply, isolated, 9 to 12 VDC is required
PAK9 Plug Pack Mains Adaptor: 240VAC to 9VDC: $20+GST

"Isolated power supply" means that the power supply output + & - terminals are not connected to ground or anything else.

J995A   RS232C to RS422/RS485, Isolated

Similar to J995X except that the RTS or CTS line on the RS232 side is used to enable the RS485 transmit function.
The RS485 side normally sits in receive mode until the RTS or CTS turns the transmit function on, then off again.
See J995X for Auto-Tx-On (RTS or CTS control not reqd).

The RS232 side has ribbon cable 0.5m, with 25-pin D female connector, (specify male if required).
The ribbon cable can be connected as DTE or DCE. The host powers the RS232 side.
Two internal LEDs shows transmit and receive data.

The RS422/485 side has screw terminal connections, and may be powered with an isolated 9VDC 100mA mains adaptor.
RS485 termination and RS485/RS422 receiver biasing jumpers (see above) are provided.
Another jumper can be installed to disable the receiver drive to the RS232 line during an RS 485 transmission.
Plastic Case: 25x50x100mm. Power supply not included.          J995A: $155+GST

External power supply, isolated, 9 to 12 VDC is required
PAK9 Plug Pack Mains Adaptor: 240VAC to 9VDC: $20+GST

"Isolated power supply" means that the power supply output + & - terminals are not connected to ground or anything else.

J995B as above, (isolated to 1000VDC) but requires 5VDC (regulated) into RS232 side.
Has isolated DC inverter to power the RS422/485 side. J995B: $195+GST

J995C has a larger box with two 240v AC input power supplies to power the RS232 and RS485 sections separately (2750v isolation) J995C: $250

J995F similar to J995B, opto-isolated, requires either 5v (regulated) or Plug-pack (unregulated 12VDC) into RS232 side.
Has isolated DC inverter (1000DVC) to power the RS422/485 side.

The RS232 side has 10-pin stake connector on PCB which connects to ribbon cable with 9-pin DB9F at outside end.
The RS485 side has screw terminals.

Option Description:

1. RS232 via a DB9 or DB25 Connector, to 2 or 4 wire RS485. In this mode, external power must be supplied to the unit.
This can be either regulated 5 volts, or unregulated 9 to 12 volts. If regulated 5 volts is used, then the on-board regulator should be removed.
The DB9 connector is female (unless specified male).
The only RS232 signals required are RX, TX & RTS. The CTS signal out of the J995F is tied permanently high on the DB connnectors.
For operation of the RS485 (either 2 or 4 wire), see operating manual.

2. RS232 via 10-way ribbon cable from a number of JED computers, to 2 or 4 wire RS485.
Same as option 1 above, except that power for the unit is supplied on the otherwise unused 10th pin of the ribbon cable.

3. TTL serial communications via a 16 way ribbon cable, to 2 or 4 wire RS485.
In this mode, the RS232 level converter is omitted from the board and all serial communications happen at TTL levels.
These signals would normally come direct from the UART on a piece of equipment without having been converted to true RS232 levels.
As in mode 2, power would normally be supplied via the ribbon cable, 16-way in this case.
If being used with non-JED equipment, the optional on-board regulator with plug pack input can be supplied. For operation of the RS485 (either 2 or 4 wire), see operating manual.

Screw terminal RS485 connections are provided.

J995F 2 or 4-wire version, with DB9F RS232 connection J995FR4: $195+GST

J995F 2-wire version, 10-pin IDC RS232 connection with 5VDC on pin-10.
                       This version is for use with other JED cards J995FR2A: $195+GST

For 25-pin DB25F connector on RS232 side, add $15+GST

Alfatron Converters (not isolated)
A440	RS232  to  RS422 Serial Converter bi-directional, not isolated,    metal case, with screw terminal block, DB25F at each end, gender changer included    mains adaptor included       data sheet (pdf 185KB)	$173+GST
A450	RS232  to  RS485 multi-drop Serial Converter, not isolated,      metal case, with screw terminal block, mains adaptor included         data sheet (pdf 180KB)           User Manual	$173+GST
A451	RS232  to  RS485  with RJ45 x2 Ethernet type connectors Full Duplex (4 wire) and Half Duplex (2 wire) operation using Standard Ethernet cables (Cat 5) Internal jumper settings allow the use of either ‘standard’ or ‘crossed’ Ethernet cables Transmits data at up to 115Kbps    Non-powered RS-485 operation for distances up to 100 metres Switchable DCE/DTE selection for RS-232 port, Switchable termination resistors for RS-485 port LED indicators for data activity    Transient Protection on RS-485 lines Monitor mode allows problem diagnosis on the RS-422/485 bus Power Supply only required for cables over 100m: 9V (200mA) DC. Mains adaptor supplied.	$183+GST

CONV232-485  &  CONV232-422   DB9 RS232 to RS422/RS485 Converters

Up to 460kbps      hmsq  
No external power required when communicating via a short cable with one device
   +5.1VDC to +12VDC @ 50mA to J2 (RS485) pin 8 with return via J2(RS485) pin 5 for multiple devices and long cabling.
   At 9600 baud, distances of up to 4000 feet are possible.
Simple Installation, No Need to Shut off PC to Connect
Nothing to Configure, No Jumpers to Set
Automatically Adjusts to the Speed of the Data
Auto RTS Built In
Plugs Directly into Standard PC RS232
RS-232 DB9 Female:  pin 2 Transmit Out, 3 Receive In, 4 DTR, 5 Gnd, 6 CTS, 7 RTS
RS-485 DB9 Male:    pin 2 RS-485+,  3 RS-485-,   4 NC,  5 Gnd, 6 NC, 7 NC,   8 External Power

   CONV232-485   RS232 to RS485 Converter, DB9 connectors : $170+GST

   CONV232-422   RS232 to RS422 or RS485 Converter, DB9 connectors: $170+GST

AIC PC485 RS232 to RS485 Converter

Non-isolated, a 25-pin 'through' connector. Powered by PC or external 9-12VDC     $170+GST    zlzkf
300 to 38400 bits per second.
RS232 side DB25 F    pin 1: shield,   2: TX (in)   3: Rx (out)   4: RTS   7: ground   20: DTR
RS485 side DB25 M   pin 1: shield   7: ground   18: B    19: A

Power supply if required, regulated 9-12VDC, on RS232 end:   20: +ve     7:  -ve ground
External power supply is generally only required when a low power serial card is used in the computer, and multiple external units are being addressed,   or when the serial port does not provide power via handshake lines.
Dimensions: 63 x 56 x 16mm

AIC PC422

RS232 to RS422 Converter $180+GST

AIC RMSC485      Click on the picture to enlarge

RS232 to RS485 Converters. DIN rail mount (35mm rail EN50022). 91mm high x 144mm wide x 120mm deep,
Connector is at the front.
RMSC485-240VAC (110VAC add $10) $180+GST
RMSC485-24VAC $195
RMSC485-DC (9-55VDC) $250

Isolated versions: add $95.

AIC RMSI422

Isolated RS232 to RS422 Converters
RMSI422-240VAC $285 RMSI422-110VAC $290
RMSI422-24VAC $295 RMSI422-DC (9-55VDC) $355

J990   RS232C to Current Loop

Opto-isolated, bidirectional, duplex 4-wire or simplex 2-wire I loop. Works reliably up to 19.2kb/sec.
Allows communications up to 1Km or more, with protection from ground currents and accidental connections to high voltage.
At the far end the loop can be driven by another STD-990 for isolation at that end, or by a JED 3-slot motherboard power supply.
A plug-pack at one end can provide isolated loop power for both directions.
Case: 25x50x100mm. Incl 16 way (2x8) cnnctr & ribbon cable.   More information: click here     J990: $140+GST

External power supply, isolated, 9 to 12 VDC is required
PAK9 Plug Pack Mains Adaptor: 240VAC to 9VDC: $20+GST

"Isolated power supply" means that the power supply output + & - terminals are not connected to ground or anything else.

MIC12 Converter RS232 to 20mA Current Loop

Used to extend the distance between two RS-232C devices (needs two sets) or to hook-up another system which merely has the alternate interface. This unit is a Bi-Directional interface converter for RS232C and 20mA Current Loop.     uzm
Each unit contains both active DRIVER (Transmitter) and passive RECEIVER.
The RS232C signals are obtained at the normal SUB-D25 connector side and current loop signal pairs are obtained at the opposite side.
It must be powered from an external 9V DC 100mA adapter.

The unit has three LED's, power ON/OFF and TXD and RXD RS232 status.
The device contains two slide switches which are used to configure DTE/DCE assignment of the RS232 wiring of the converter and the monitor/simulate operation mode.
General applications include extending the distance between two RS232C devices (needs two sets) or to hook-up another system with the other interface.

Transmitter & Receiver function in one unit
Powered from external 9V DC 100mA adapter
Extends the distance between two RS232 devices
Transmit & receive LED for RS232 signal
Line length within 4,000 ft (1219 metres)

• Power: DC 9V 100mA adapter or DC9V 60mA from the RS232C pin #9
• Switches:   SW1: DTE or DCE     SW2: MONITOR or SIMULATE mode
• Data Rate: up to 19200 bps
• Line Length: within 4000 ft (1219 metres)
• Connectors: RS232C:       DB25 male
                      Current Loop:  RJ116P4C Jack
                      Current Loop:  4 screws terminal
¨ Dimensions: 77 x 54 x 22 mm  MIC12 Converter RS232 to 20mA Current Loop: $190+GST

M15134 Converter RS232 to Current Loop

This RS-232 current loop converter provides an expandable current loop communication for standard RS-232 interface.
Standard EIA RS-232C communication protocol
· Selectable passive or active current loop.
· DCE, DTE or loopback selectable.
· Selectable full or half duplex.
· Compact
· Terminal block connector for long haul cable.
Specifications:
Ports 1 x DB-25 female connector
Power 9V external supply
Current loop 20mA or 60mA selectable
Weight 300g including “computer” link cable.
         M15134 Converter RS232 to Current Loop: $175+GST

IC-488P   IEEE-488 GPIB to Centronics - no longer available

Lets you connect IEEE-488 equipment to standard parallel port printers.
Adjustable Listen Address 0-30; or Listen Only Mode     IFC Control Line, and DCL/UNC Command Valid
Easy to Install and Operate   -  Compact Size
Connectors:   Input: IEEE-488 24-pin Female     Output: Centronics C-36 Male   Leds: Ready & RFD
IEEE-488 Interface:   SH0, AH1, L1, T0, SR0, RL0, PP0, DC2, DT0, C0
Power Consumption: DC 9V 150mA (Max.)      Housing Metal - Weight 137 g
Dimensions (L x W x H): 86.4 x 55 x 22 mm    Picture of rear showing DIP switch settings
IC-488P   IEEE-488 GPIB to Centronics: $185+GST

Fibre Optic Converters

M15073 Converter RS232 to Fibre Optic with RTS/CTS

The fibre optic converter allows RS232 or RS422 signals to be converted to fibre optic for up to 1500m,
high speed up to 5Mbps, and high quality communication.
There are 3 LED indicators corresponding to RX, CTS and power.
Jumpers allow selection of DTE or DCE.
HFBR-1414 fibre optical transmitters and HFBR- 2416 fibre optical receivers are used and have ST fibre connection.
It is suitable for 50/125um, 62.5/125um and 100/140um fibres. Operating temperatire range: 0 to 55°C
A 9v, 500mA power adapter and a serial connecting cable are provided in the package. Data: click here   $ 460+GST

M15074 Converter RS422 to Fibre Optic

The fibre optic converter allows the RS422 input signals to be converted to fibre optic signals for long distance,
high speed and high quality communication. There are 3 LED indicators to correspond to RxD, CTS and power signals.
A 9v, 500mA power adapter is provided in the package. Has 4 ST fibre connectors.
Two are normally required  Data 1 : click here    Data 2: click here    M15074, each:  $605+GST

M15136  Converter RS422 to Fibre Optic

Same as M15074 above, except with no RTS/CTS handshaking. Has 2 ST fibre connectors (instead of 4): $605+GST

ADAM Converters - Advantech

Data on ADAM converters: click here       RS232 / RS422 / RS485 - Fibre Optic - Radio - Ethernet

Other ADAM Modules

A/D converters, Thermocouple & RTD inputs, Digital & Relay inputs/outputs, Analog Outputs, Counter & Frequency modules.   ADAM-4000: click here

These all have RS485 interfaces, so they can be daisy chained on twisted pair wires.
They interface to a PC via an RS485 to RS232 converter such as the ADAM 4520 above.

Quatech Ethernet to Serial Converters
  Serial Device Servers - SDS

Easy installation and configuration in under 10 minutes    hmsq
Network enable RS-232 serial devices for remote access and control
Remote Web browser-based configuration, administration and troubleshooting
Auto-detecting 10/100 Mbps Ethernet with built-in TCP/IP
Raw TCP and IntelliSock™ TCP socket services for custom applications
Configure as TCP Server, TCP Client, or as both using the exclusive AutoTCP feature
Serial Tunneling mode for connecting two serial devices over a network without a PC
1, 2, 4, or 8 independent RS-232 serial ports
DB-9 and RJ-45 models available
Surge suppression models are available
Virtual COM drivers for Windows Windows NT4/2000/XP & Linux, other OS support via socket modes
5 year limited warranty
NEW: Port-Powered models with standard surge suppression and +5V at the port

Quatech's ThinQ serial device servers are engineered to Motorola® digital dna™ standards featuring a PowerPC® core with an on-board RISC communications processor. This Dual-CPU design, the auto-sensing 10/100 Ethernet interface, and Quatech's proven high-speed, 921k-baud serial technology offer the best performance in the industry and ensure that your critical business applications won't be harmed by data throughput or latency issues.

Easy to set up and install, ThinQ serial device servers are up and running on your network in 10 minutes or less. A unique Installation Wizard automatically searches for and identifies any ThinQ unit attached to the network, even searching remote subnets if needed. No client software is installed on your PC, just a small set of drivers that configures each ThinQ serial port as a new COM port on the PC. This allows software applications to access the attached serial device as they are designed to, with no custom programming needed. Simply point your software application to the new, "virtual" COM port and you're all set!

Do you have two serial devices that communicate directly with each other and you wish to replace the short serial cable using the distances possible with Ethernet technology? The serial tunneling feature now available on every ThinQ model can do this much easier than you imagine. Set up one ThinQ unit as the master, tell it the IP address of the remote ThinQ unit, and plug them both in. The master will locate and configure the remote unit for you, right out of the box! The two serial devices will then communicate as if connected by a short serial cable; the Ethernet portion will be invisible to the devices.

For remote service and monitoring applications, try our new AutoTCP feature. The serial port can be set up to act as a TCP Client, requesting a connection whenever the serial device is attached and powered on or, if you prefer, whenever serial data is ready for upload to the host computer. You can leave the connection on, or disconnect from the host after a specified period. But when a service request from a remote monitoring PC (with a specified IP address) arrives, ThinQ will act as a TCP server, allow access to the serial device to the monitoring PC, and go back to Client mode when the Server session is finished. This is perfect for remote troubleshooting, support and report generation!

Quatech's "virtual" COM drivers and the Installation Wizard are available for Windows NT4/2000/XP and Linux. ThinQ can be deployed successfully in almost any OS environment however, including Unix and Solaris, via Raw TCP (socket) mode or Quatech's exclusive IntelliSock™ mode. IntelliSock is a flexible and powerful TCP socket service for custom applications that provides capabilities beyond that of Raw TCP mode, such as re-configuring the serial port in the packet header sent with each data transfer. A free Software Developer's Kit (SDK) explains more about this unique feature.

ThinQ RS-232 serial device servers are available in single port and multi-port (two, four and eight port) versions for asynchronous serial devices. Multi-port models are available with DB-9 or 10-pin RJ-45 serial connectors, but custom 10-pin adapters are available for converting ports on the "D" models to RJ-45 for added cabling flexibility and better support for a mixture of serial devices.

ThinQ units are housed in a solid metal case suited for rugged industrial environments and a surge suppression option is available, as are DIN rail mounting for individual units, and rack mount kits for multi-port models.

RS-232 only
H-SSE-100D        Single port RS-232 serial device server, DB9        $445+GST      12/07
H-SSE-100D-SS  Single port RS-232 serial device server, DB9, with surge suppression $460
H-SSE-100D-5V  Single port RS-232 serial device server, DB9, with surge suppression & 5V power on pin 9 $484

H-DSE-100D        Dual port RS-232 serial device server, DB9 $512
H-DSE-100D-SS  Dual port RS-232 serial device server, DB9, with surge suppression $543
H-DSE-100D-5V  Dual port RS-232 serial device server, DB9 with surge supression & 5V on pin 9 $590

H-QSE-100D        Four port RS-232 serial device server, DB9 $706
H-QSE-100D-SS  Four port RS-232 serial device server, DB9, with surge suppression $767
H-QSE-100M        Four port RS-232 serial device server, RJ45 $706
H-QSE-100M-SS  Four port RS-232 serial device server, RJ45, with surge suppression $767

H-ESE-100D        Eight port RS-232 serial device server, DB9 $1,015
H-ESE-100D-SS  Eight port RS-232 serial device server, DB9, with surge suppression $1,140
H-ESE-100M       Eight port RS-232 serial device server, RJ45 $1,015
ESE-100M-SS Eight port RS-232 serial device server, RJ45, with surge suppression $1,140

RS-232/422/485
H-SSE-400D Single port RS-232/422/485 serial device server, DB9      $484+GST    12/07
H-SSE-400D-SS Single port RS-232/422/485 serial device server, DB9, with surge suppression $500

H-DSE-400D        Dual port RS-232/422/485 serial device server, DB9 $590
H-DSE-400D-SS  Dual port RS-232/422/485 serial device server, DB9, with surge suppression $621

H-QSE-400D        Four port RS-232/422/485 serial device server, DB9 $861
H-QSE-400D-SS  Four port RS-232/422/485 serial device server, DB9, with surge suppression $923
H-QSE-400M        Four port RS-232/422/485 serial device server, RJ45 $861
H-QSE-400M-SS  Four port RS-232/422/485 serial device server, RJ45, with surge suppression $923

H-ESE-400D        Eight port RS-232/422/485 serial device server, DB9 $1,325
H-ESE-400D-SS  Eight port RS-232/422/485 serial device server, DB9, with surge suppression $1,448
H-ESE-400M        Eight port RS-232/422/485 serial device server, RJ45 $1,325
H-ESE-400M-SS  Eight port RS-232/422/485 serial device server, RJ45, with surge suppression $1,448

Options:
SDS-410-DIN DIN Rail Mounting Clips

Embeddable Cards:
H-SSE-100D-EMB   Embedded single port RS-232 serial device server, with surge suppression $350+GST   12/07
H-DSE-100D-EMB   Embedded dual port RS-232 serial device server, with surge suppression $443

M15113  Serial to Ethernet Converter Module

NPort Express turns any serial device (RS-232/422/485) into a network device instantly.
Allows RS232 devices, including modems to be used over a TCP/IP network.    ozpv
Configuration may be performed through the serial port via Telnet or through the ethernet connection.
Auto-detecting 10/100 Mbps Ethernet interface   
3-in-1 interface supports RS-232/422/485    50 bps – 230.4 Kbps
Supports all Windows Native COMs and Linux fixed tty drivers
Complete Ethernet and TCP/IP protocol
RS-485 supports ADDC (Automatic Data Direction Control) Intelligence
Automatic network connection recovery
Support PComm library for easy programming
Supports Windows 95/98/ME, Windows NT, and Windows 2000, native COM drivers,
so that your existing COM port based application software will be completely compatible.
Benefits
Easy integration with any serial devices, such as personal identification devices, CNCs,
PLCs, switches, UPS, and Medical/Physical/Chemical instruments          ozpv
Preserve your investment by instantly turning serial devices into Internet devices that run on you existing software
Extremely low transition cost       More information: click here     Data sheet   M15113:  $730+GST      

Specifications

Processor 80186, Memory 512 KB, Connector type Female DB9

Speed 50 to 230 Kbps
Parity: None, even, odd    Data bits 7, 8     Stop bits 1, 2 (None Parity Only)

Management DE-311: Serial console Telnet console

Windows Utility  DE-311: Setup program, Manager, Monitor, Firmware Upgrade

Power requirements: DC 9V to 20V, 400 mA at 9V
Operating temp.: 0 to 55C
Dimensions 87 x 100.4 x 22 mm ( W x D x H )
Regulatory approvals FCC, CE    

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Posiflex IW-2000 Wedge Converter

IW-2000, RS-232 to PS/2       uzm

Converts RS-232C to TTL keyboard data.
Provides RS232C interface & daisy chain keyboard wedge.
Supplies 5 volts power to the attached RS232C device.
Interfaces with all known international PC keyboards.
Housed in a 25 pin D-type connector.
Converts data independent of computer keyboard settings (i.e. Caps lock)
Operates with or without the normal computer keyboard.
Computer continues to work if the RS232 device is removed.
Computer continues to work if the computer keyboard is removed.
Low power, all CMOS active components.
Complies with CE standard.
1 metre long cable.                         IW-2000 RS-232C to PS/2 Converter: $150+GST