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Industrial Port-Powered RS232
Isolator (3-wire)
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Model:
CVT-232A-3
$35.95
In stock
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Volume Discounts
Qty: 10+ $32.36
Qty: 50+
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The CVT-232A-3
is a
compact, rugged, industrial-grade,
port-powered, 3-wire RS-232 Isolator. The unit
optically isolates
three (3) RS-232 lines (TX, RX and GND), which effectively
protects your RS-232 devices from
ground
loops, noise problems, transient surges, remote lightning and spikes.
This
industrial 3-wire RS232 isolator
provides a
5000Vrms (AC, 1min) optical isolation. It operates within a
temperature range of -40ºF to 185ºF (-40ºC to 85ºC),
and features 600W surge protection and 15kV static
protection. The unit is efficiently powered from the RS232 data line,
it requires no external power or software drivers, making
the unit a highly reliable and truly plug-and-play
device and an ideal solution for all types of installations.
The unit is
backed by our 30-day risk-free money-back guarantee and
5-year replacement warranty.
Baud
rates: 300 to 38.4K Baud.
See
also:
7-wire RS232 Isolator
(CVT-232B-3)
datasheet | 
FAQs |
product selection guide
 testing
info |
 declaration
of conformity |
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PRODUCT PHOTOS
(INDUSTRIAL RS232 ISOLATOR - 3 WIRE)
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Note:
We also provide custom-made product (male connector with screws and female
connector
with nuts) upon request, minimum quantity
of order:
10 units. |
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FEATURES (INDUSTRIAL RS232 ISOLATOR)
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- Optically isolates three (3) RS-232 lines (TX, RX
and GND).
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5000V optical isolation effectively protects your RS-232 devices from
ground loops,
noise problems, transient surges, remote lightning and spikes.
- 300 to 38.4K Baud operation (auto-sensing & self-adjusting).
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Industrial grade with temperature range of -40ºF to 185ºF (-40ºC to 85ºC),
surge (600W)
and static protection (15kV).
- No drivers needed.
- No DIP switch or jumper settings.
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Port-powered, no external power or
RTS, DTR required.
- Plug and play (hot-pluggable, data format auto-sensing &
self-adjusting).
- Built-in
surge protection, static protection and circuit
protection.
- Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
- Safety: Strictly certified by TUV (Cert No. SG-CE-090012).
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5-year
manufacturer's warranty. |
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SPECIFICATIONS (INDUSTRIAL RS232 ISOLATOR -
3 WIRE)
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Part Number: |
CVT-232A-3 |
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Compatibility: |
EIA/TIA
RS-232C standard |
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Power Source: |
Port power
from RS232 data line |
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Current
Consumption: |
Less than
10mA |
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Optical
Isolation: |
5000Vrms
(AC, 1 min) |
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Baud
Rates: |
300
to 38,400bps (auto-sensing & self-adjusting) |
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Distance: |
RS-232: 16ft
(5m) |
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Connector: |
DB-9 Female
Connector and DB-9 Male Connector |
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Surge protection: |
600W |
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Static
protection (ESD): |
Up to 15KV |
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Dimensions (H
x W x D): |
0.63 x 1.3
x 2.5 in (16 x 32 x 63 mm) |
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Weight: |
0.83 oz
(23.5 g) |
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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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ISOLATOR CONNECTOR PINOUTS
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Female RS232 Side |
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Pin |
1 |
4 |
6 |
7 |
8 |
2 |
3 |
5 |
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Signal |
DCD |
DSR |
DTR |
CTS |
RTS |
TX |
RX |
GND |
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Function |
Tied |
Tied |
TX |
RX |
GND |
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 Note:
Some software requires handshake line
acknowledgements. To satisfy the requirements, our
converter's handshake lines are tied together (DCD,
DTR, and DSR tied together, and RTS and CTS tied
together). Therefore, you don't have to modify your
existing software. |
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DB-9
Female (view from front) |
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Male RS232 Side |
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Pin |
1 |
4 |
6 |
7 |
8 |
2 |
3 |
5 |
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Signal |
DCD |
DTR |
DSR |
RTS |
CTS |
RX |
TX |
GND |
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Function |
Tied |
Tied |
RX |
TX |
GND |
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 Note:
Some software require handshake line
acknowledgements, to satisfy the requirements, this
3-wire RS232 Isolator's handshake lines are tied
together (DCD, DTR, DSR tied together, and RTS, CTS
tied together), therefore, you don't have to modify
your existing software. |
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DB-9 Male (view from front) |
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CONNECTIONS (INDUSTRIAL RS232 ISOLATOR - 3
WIRE)
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FIGURE 1:
CVT-232A-3 CONNECTION DIAGRAM (DTE TO DCE) |
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FIGURE 2:
CVT-232A-3 CONNECTION DIAGRAM (DTE TO DTE) |
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[+]
TROUBLESHOOTING 3-WIRE RS232
OPTO-ISOLATOR
Loopback Test
- Connect the female
connector end of the isolator to your PC’s COM port and
connect the other end (male connector) to another of
your PC’s COM ports with a null-modem converter (or
connect pin 2 to 3, pin 3 to 2, and pin 5 to 5 between
the male connector and your PC's RS232 connector) (as
shown above).
- Run two instances
of the
232Analyzer FREE
version software on your computer.
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Select "ASCII" for both the Send and Receive data
formats. Then send command and/or string such as
"CommFront" from one COM port. You should receive an
echo of the command/string sent ("CommFront") on the
other COM port. By performing a simple loopback test
like this, you can test both the transmitter and
receiver of the isolator. This is very helpful when you
are in doubt about the performance of your isolator.
Screenshot 1: Send commands
from 1st instance of the 232Analyzer software.
Screenshot 2: Receive commands
from 2nd instance of the 232Analyzer software.
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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