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Model:
TTL33-232-1
$32.95
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The TTL33-232-1 is a compact, rugged,
industrial-grade,
port-powered, bi-directional
RS232 to TTL 3.3V converter, which can be used to convert
RS-232 to 3.3V TTL/CMOS compatible levels and vice
versa.
This
industrial RS232 to TTL 3.3V converter
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 RS-232 data line,
and the full-duplex RS232 to full-duplex TTL conversion
eliminates the need of auto-turnaround feature,
therefore, 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 115.2K Baud.
See
also:
Industrial RS232/TTL
5V Converter (TTL-232-1)
 datasheet |  FAQs |
product selection guide
 testing
info |
 declaration
of conformity
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PRODUCT PHOTOS |
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FEATURES
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Converts RS232 to TTL 3.3V and vice versa.
- 300 to 115.2K 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.
- 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
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Part Number: |
TTL33-232-1 |
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Compatibility: |
EIA/TIA
RS-232C standard and TTL 3.3V level |
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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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Baud
Rates: |
300 to 115,200bps (Auto-sensing &
Self-adjusting) |
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Distance: |
RS232 side:
16ft (5m); TTL side: 10ft (3m) |
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Connector: |
RS232 Side:
DB-9 Female; TTL Side: DB-9 Male;
Termination
Board: DB-9 Female and a 4-Way Terminal Block |
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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 3.5 in (16 x 32 x 88 mm) (with Termination Board) |
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Weight: |
1.27 oz (36 g)
(with Termination Board) |
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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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TTL SIGNAL LEVELS
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TTL Input |
TTL Output |
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High
(>2.0V) |
High
(3.3V) |
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Low (<0.8V) |
Low (0.0V) |
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CONVERTER CONNECTOR / TERMINAL
BLOCK PINOUTS
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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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Terminal Block Side |
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Pin |
1 |
3 |
5 |
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Terminal Block |
TX |
RX |
GND |
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Function |
TTL Out |
TTL In |
GND |
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 Note:
The TTL33-232-1 comes with a 3-way terminal block
for easy wire connections. However, you may choose
not to use the terminal block provided and simply
follow the above table for pin assignments. |
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DB-9 Male (view from front) /
Terminal Block |
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CONNECTIONS
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Figure 1:
TTL33-232-1 Connection Diagram |
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[+]
TROUBLESHOOTING RS232 TTL 3.3V CONVERTER
Loopback Test
- Connect a TTL33-232-1
to your PC's COM port and short TX and RX on the TTL
terminal block (as shown above).
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Run 232Analyzer
FREE version software on your computer.
- Select "ASCII" for
both the Send and Receive data formats. Then send
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.
Screenshot: Send/receive
commands from 232Analyzer software.
232Analyzer is an advanced RS232 Serial Protocol Analyzer
software
that allows you to control, monitor and analyze serial port
(RS232 / RS485 / RS422 t also ato 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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