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INTRODUCTION (OPTO-ISOLATED USB TO RS232 RS485 RS422 CONVERTER)
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(Windows 7
supported!)
$119.95
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The
USB-Serial-3 is a rugged, superior-quality, industrial-grade, optically-isolated,
bi-directional USB
to RS232/RS485/RS422 converter, which can be used to convert
any standard USB port into a three-wire RS-232 port, a
two-wire RS-485 port, or a four-wire RS-422/RS-485 port and
vice versa.
This
industrial opto-isolated USB to RS232 / RS485 / RS422 converter
is enclosed in a heavy-duty, rustless ABS housing. It
operates within a
temperature range of -40ºF to 185ºF (-40ºC to 85ºC),
features 600W surge protection and 15kV static protection,
and comes with
a built-in 120-Ohm terminator for system reliability and
easy installation.
It also features opto-isolation circuitry, which effectively
protect your USB devices from
ground
loops, noise problems, transient surges, remote lightning and spikes.
The unit is powered from the USB port and
it features data format auto-sensing and self-adjusting;
therefore, no DIP switch or jumpers are required. The unit can be used to communicate with one
loop of up to 128 units of RS485 or RS422 devices, when working with RS-485 signals,
the CommFront’s auto-turnaround feature eliminates the need
for flow control.
A separate
external power supply is included in the package, and,
thanks to the professional and unique casing design, the
product can be mounted directly on a wall, panel or DIN Rail,
without a need of using any unsecured DIN-Rail or wall-mount adapters.
This isolated USB-Serial Converter uses the latest chipset from Silicon Labs and is
fully compatible with Windows 7/Vista/XP/ Server2003 /2000
(32-bit), Windows 7/Vista (64-bit), Win CE (5.0, 6.0), Mac OSX, and Linux (2.6x, 2.4.36).
The device is backed by our 30-day risk-free money-back guarantee
and 5-year replacement warranty.
Baud
rates: 300 to 115.2K Baud.
datasheet |  FAQs |
product selection guide
 testing
info |
 declaration
of conformity
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PRODUCT PHOTOS
(ISOLATED USB TO RS232 RS485 RS422 CONVERTER)
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FEATURES (OPTO
ISOLATED USB TO RS232 RS485 RS422 CONVERTER)
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Industrial grade Enclosed in a rugged, rustless ABS housing.
- Direct DIN-Rail (Rack)
or Wall / Panel mounting.
- USB port-powered, no external power required.
- Adds one
RS-232, RS-485 or RS-422 port to your USB port.
- 300 to 115.2K Baud operation (auto-sensing and
self-adjusting).
- Communicate with one loop of up to 128 units
of RS485 or RS422 devices.
- Optical isolation
effectively protects USB devices from
ground
loops, transient
surges, remote lightning and spikes. It also eliminates
ground loop and noise
problems.
- Data direction auto-turnaround, no flow control is required.
- Plug and play (hot-pluggable, data format
auto-sensing and self-adjusting).
- Built-in 120Ω end-of-line terminator for system reliability and easy installation.
- Supports
Windows 7/Vista/XP/Server2003/2000 (32-bit), Windows 7/Vista
(64-bit), Win CE, Mac, and Linux.
- Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
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Built-in 600W
surge protection, 15kV static protection and circuit
protection.
- Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
- Safety: Strictly certified by TUV
(Cert No. SG-CE-100004; SG-FCC-100001).
- 5-year
manufacturer's warranty. |
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SPECIFICATIONS (OPTO
ISOLATED USB TO RS232 RS485 RS422 CONVERTER)
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Part Number: |
USB-Serial-3 |
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Compatibility: |
USB 2.0
and EIA/TIA RS-232/485/422 standards |
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Power Source: |
From USB port |
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Current
Consumption: |
Less than
200mA |
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Baud
Rates: |
300 to 115,200bps (Auto-sensing &
Self-adjusting) |
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Optical
Isolation: |
2500Vrms (AC,
1 min) |
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Distances: |
USB: 10ft (3m); RS-232: 16ft (5m); RS-485/422: Depending on
the power from USB port,
will transmit up to 4000ft (1.2km) at 19,200bps |
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Connectors: |
USB:
Type B male; RS-232/485/422: 10-Way
Terminal Block |
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Accessories: |
1x 5ft
(1.6m) USB extension cord (Type B female to Type A female) |
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Maximum number of drops: |
RS-232: 1;
RS-485/422: 128 |
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Surge
Protection: |
600W |
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Static
Protection (ESD): |
15kV |
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End of Line Terminator: |
120Ω (Built-in) |
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Dimensions (H x W x D): |
4.5 x 3.6 x
0.9 in (115 x 73 x 33 mm) |
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Weight: |
4.2 oz (120
g) (with terminal block) |
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Operating Temperature: |
-40ºF to
185ºF (-40ºC to 85ºC) |
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Operating Humidity: |
Up to 90% RH (no condensation) |
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CONVERTER CONNECTOR / TERMINAL
BLOCK PINOUTS
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USB
Side |
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USB
Type B Male Connector (view from front, without USB
extension cord) |
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USB
Type A Female Connector (view from front, with USB
extension cord) |
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RS-232/485/422 Side |
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Pin |
TX+/A+ |
TX-/B- |
RX+ |
RX- |
J1 |
J2 |
J3 |
J4 |
GND |
TX |
RX |
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RS232 |
- |
- |
- |
- |
- |
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GND |
TX |
RX |
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RS485 |
485+ |
485- |
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Tie to ON 120Ω |
GND |
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- |
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RS422 |
TX+ |
TX- |
RX+ |
RX- |
Tie to ON 120Ω |
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GND |
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CONNECTIONS
(OPTO ISOLATED USB TO RS232 RS485 RS422 CONVERTER)
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Figure 1: USB to RS232
Connection |
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Figure 2: Master-Slave
Multi-Drop Connections (RS485) |
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Figure 3: Master-Slave
Multi-Drop Connections (RS422) |
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DRIVER INSTALLATION (ISOLATED USB TO RS232/485/422 CONVERTER)
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Install
drivers from the CD provided with the product (as shown
above). |
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Note: |
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The latest
drivers (chipset: Silicon Labs’ CP210x) are available at:
http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx |
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TROUBLESHOOTING USB TO RS232/RS485/RS422 CONVERTER
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1) Driver installation |
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Make sure
that the USB-Serial-3 converter is connected to your USB port, and the
driver is installed correctly (as shown above); otherwise, please
reinstall the driver (refer to user
manual for details). |
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2) Loopback Test |
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Connect a USB-Serial-3 to your PC's COM port and
connect TX+ to RX+, TX- to RX- (as shown above).
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Run 232Analyzer
FREE version software on your computer.
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Select "ASCII" for both the Send and Receive data
formats. Then send a command and/or string such as
"CommFront" from the 232Analyzer software. You should
receive an echo of the command/string sent
("CommFront"). By performing a simple loopback test like
this, you can test both the transmitter and receiver of
the converter. This is very helpful when you are in
doubt about the performance of your converter.
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Screenshot: Send/receive
commands from 232Analyzer software. |
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232Analyzer is an advanced RS232 Serial Protocol Analyzer
software
that allows you to control, monitor and analyze serial port
(RS232 / RS485 / RS422 / TTL, etc.) activities.
Not just the data,
it also allows you to monitor or change RS-232's line
states: RTS, CTS, DTR, DSR, DCD, and RI.
The FREE version (no time
limitation) can be downloaded from
here.
TECH NOTES
RS-232: 3 easy steps to understand and control
your RS232 devices
RS-485/RS422:
Building a reliable RS485/RS422 network |
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