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Industrial RS485 / RS422 Converter / Repeater
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Model:
RPT-485_422-2
$69.95
In stock
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The RPT-485_422-2 is
a multi-function, compact, rugged,
industrial-grade
RS485 to RS422 converter / repeater,
which can
be used to extend the RS485 or RS422 distance to up to 4000
ft (1.2km), or to convert a two-wire RS485 signal into a
four-wire RS422 signal, and vice versa.
This
industrial RS485 to RS422 converter / repeater
operates within a
temperature range of -40ºF to 185ºF (-40ºC to 85ºC),
and features 600W surge protection and 15kV static
protection.
The
unit is powered from an external 5VDC regulated power supply;
it
supports data direction auto-turnaround. Therefore, it
requires no software drivers or flow control, 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.
A separate external 5VDC regulated power supply is included
in the package.
Baud
rates: 300 to 115.2K Baud.
See
also:
Isolated RS485/422 Repeater/Converter
(RPT-485_422-4)
datasheet |  FAQs |
product selection guide
 rs485/rs422 application note
 testing
info |
 declaration
of conformity |
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PRODUCT PHOTOS
(INDUSTRIAL RS485 TO RS422 CONVERTER / REPEATER)
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FEATURES (INDUSTRIAL RS485 /
RS422 CONVERTER / REPEATER)
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Converts 2-wire RS485 to 4-wire RS422
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.
- 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.
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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 RS485
TO RS422 CONVERTER / REPEATER)
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Part Number: |
RPT-485_422-2 |
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Compatibility: |
EIA/TIA
RS-485 and RS-422 standard |
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Power Source: |
+5VDC (±5%)
Regulated Power Supply (not included) |
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Current
Consumption: |
Less than
30mA |
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Baud
Rates: |
300 to 115,200bps (auto-sensing and
self-adjusting) |
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Distance: |
Up
to 4000ft (1.2km) at 19,200bps |
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Connector: |
2x DB-9 Male
Connectors; 2x Termination Boards: DB-9 Female and a 6-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 4.6 in (16 x 32 x 118 mm) (with termination boards) |
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Weight: |
2.0 oz (57
g) (with termination boards) |
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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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RS485/RS422 Side |
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Pin |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
4 |
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Jumper |
J2
(default: ON) |
J3
(default: ON) |
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J1
(default: ON) |
J4
(default: ON) |
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RS485 |
A+ (J2 ON) |
B- (J3 ON) |
GND |
(J1 ON) |
Terminate/remove Jumper J4
to turn ON/OFF the 120Ω
end-of-line terminator. |
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RS422 |
(J2 OFF) |
(J3 OFF) |
GND |
(J1 OFF) |
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TX+ |
RX+ |
TX- |
RX- |
GND |
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 Note:
The RS485 <=> RS422 converter (Model: RPT-485_422-2) comes
with two (2) nos. of 6-way terminal blocks 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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JUMPER SETTINGS FOR RS485 /
RS422 MODES
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1) RS485 Mode |
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- Turn ON Jumper 1, 2 & 3 for RS-485 mode;
- Important: Turn ON J4 (120 Ohm End-Of-Line
Terminator) at both ends of the RS-485 bus when its distance
is over 660ft (200m). |
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2) RS422 Mode |
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- Turn OFF Jumper 1, 2 & 3 for
RS-422 mode;
- Important: Turn ON J4 (120 Ohm End-Of-Line
Terminator) at both ends of the RS-422 bus when its distance
is over 660ft (200m). |
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CONNECTIONS (RS485 RS422
CONVERSION AND EXTENSION)
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Figure 1: Two-wire
RS-485 <=> Four-wire RS-422 Conversion |
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Figure 2:
Two-wire RS-485 Repeater |
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(Note: The
maximum number of supported nodes depends on the RS-485
master) |
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Figure 3:
Four-wire RS-422 Repeater |
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(Note: The
maximum number of supported nodes depends on the RS-422
master) |
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[+]
TROUBLESHOOTING RS485 RS422
CONVERTER / REPEATER
1) External 5VDC power input
CAUTION: Be sure that the
DC power applied to pin +5V and GND is within the range
of +4.75V to +5.25V (5V ±5%). Excessive input voltage or
incorrect polarity connection could damage the
converter.
2) Loopback Test
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Connect an RPT-485_422-2 to your PC's RS422 port and
remove Jumper 1 and terminate Jumper 2 and 3 on the loopback-side termination board
(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 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 / 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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