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RS485
HUB / RS485
SPLITTER / RS485 STAR WIRING TOPOLOGY
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Isolated RS485 / RS422
Repeater / Converter (Rack/Wall-Mount) |
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Isolated RS485 Hub / Splitter (Rack/Wall-Mount) |
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Other products |
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FREE
Worldwide Shipping |
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(Same-Day Shipping) |
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Within USA
(Ship
from Maryland) |
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USPS Priority:
FREE |
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Customer FedEx/UPS/DHL
acc#: FREE |
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2Day: From $8 |
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(Guaranteed FedEx: Close at 5:30pm EST) |
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Registered Airmail:
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Testimonials |
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"I am communicating with kWh
(energy) meters that have the RS485 built in, the
port-powered converter's auto-turnaround feature works
really well for my application, and I don't have to
change any configuration."
- Peter
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"Your isolators
have been working reliably for years without a
single failure or trouble, we are satisfied with the
products."
- David
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Industrial
Opto-Isolated RS485 Hub/Splitter
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Model:
HUB-485-4
$149.95
In stock
Order Here
Volume Discounts
Qty: 10+ $134.96
Qty: 50+
$127.46
Other Qty:
Ask |
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The HUB-485-4 is a rugged,
industrial-grade,
optically-isolated RS-485
Hub/Splitter/Repeater, which can be used to expand RS-485
networks by splitting one RS-485 network into four, in turn
increasing the maximum number of nodes and the distance
covered by an RS-485 network.
This
industrial opto-isolated RS485 Hub / Splitter
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, 15kV static protection and
opto-isolation circuitry, which effectively
protect your RS232/RS485 devices from
ground
loops, noise problems, transient surges, remote lightning and spikes.
The unit comes with options
for RS-485 or RS-232 input, for easy installation. It was
designed so that data coming from the input (RS-232 or
RS-485) will transmit to all four loops of RS-485 networks.
However, each loop of RS-485 devices will transmit data back
to the input only, thus reducing any possible interference
between each loop of the RS-485 devices. Also, the failure
of any individual loop will not affect other loops, making
the RS-485 networks more robust and reliable. The unit
supports data rates up to 115.2K Baud and features data
format auto-sensing and self-adjusting. Therefore,
it requires no manual settings, software drivers or flow
control, making the unit a highly reliable
and truly plug-and-play device.
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.
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.
datasheet |  FAQs |
product selection guide
 rs485/rs422 application note
 testing
info |
 declaration
of conformity |
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PRODUCT PHOTOS
(ISOLATED RS485 HUB / SPLITTER / REPEATER)
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FEATURES (ISOLATED RS485 HUB /
SPLITTER / REPEATER)
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Industrial grade Enclosed in a rugged, rustless ABS housing.
- Direct DIN-Rail (Rack)
or Wall / Panel mounting.
- Expands RS-485 networks by splitting one RS-485
network into four, thus making
star-wiring possible for RS-485 networks.
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The failure of any individual loop will not affect
the others, making the RS-485
network more robust and reliable.
- 300 to 115.2K Baud operation (auto-sensing & self-adjusting).
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Optical
isolation effectively protects RS-232/RS-485 devices from ground loops,
noise problems, transient surges, remote lightning and spikes.
- Supports up to 512 (4x 128) nodes of RS-485 devices.
- No drivers needed.
- No DIP switch or jumper settings.
- Plug and play (hot-pluggable, data format auto-sensing &
self-adjusting).
- Data direction auto-turnaround, no flow control is required.
- 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).
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5-year
manufacturer's warranty. |
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SPECIFICATIONS (ISOLATED RS485
HUB / SPLITTER / REPEATER)
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Part Number: |
HUB-485-4 |
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Compatibility: |
EIA/TIA
RS-232 and RS-485 standards |
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Power Source: |
9 to 30VDC
(External AC to DC power adapter included) |
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External AC/DC
Power Adapter: |
9VDC/500mA
(Input: 100~240VAC 50/60Hz, US type A plug) |
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Current
Consumption: |
Less than
30mA |
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Optical
Isolation: |
2500Vrms (AC,
1min) |
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Baud
Rates: |
300 to 115,200bps (auto-sensing and
self-adjusting) |
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Distance: |
RS-232: 16ft
(5m); RS-485:
up to 4000ft (1.2km) at 19,200bps |
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Maximum Number
of Nodes: |
Input: 1;
Output: 4x 128
nodes |
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Connector: |
2x 10-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): |
4.9 x 3.6 x
0.9 in (125 x 73 x 33 mm) |
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Weight: |
4.9 oz (140 g) (with terminal blocks) |
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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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RS-232/RS-485 Input Side: |
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Pin |
A+ |
B- |
GND1 |
TX |
RX |
9-30V |
GND1 |
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RS232 |
- |
- |
Input/DC GND |
TX |
RX |
DC+ |
Input/DC GND |
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RS485 |
485+ |
485- |
Input/DC GND |
- |
- |
DC+ |
Input/DC GND |
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Terminal Block (input side) |
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4x RS-485 Output Side: |
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Pin |
A1+ |
B1- |
A2+ |
B2- |
A3+ |
B3- |
A4+ |
B4- |
GND2 |
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Output |
1 |
2 |
3 |
4 |
Output GND |
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RS485 |
485+ |
485- |
485+ |
485- |
485+ |
485- |
485+ |
485- |
Output GND |
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Terminal Block (output side) |
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CONNECTIONS (ISOLATED RS485 HUB
/ SPLITTER / REPEATER)
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Figure 1: RS-485
HUB/SPLITTER/REPEATER CONNECTION DIAGRAM |
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INSTALLATIONS |
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Figure
2: DIN-RAIL
(RACK) MOUNTING |
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Figure 3: WALL/PANEL MOUNTING |
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[+] TROUBLESHOOTING RS485 HUB / SPLITTER / REPEATER
1) Make sure
the power is connected and turned on.
2) Check the connections according to the above
“CONNECTIONS” diagram.
3) Loopback Test
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Connect one of your PC's RS-232 or RS-485 ports to the
input of HUB-485-4. Now connect another RS-485 port from
your PC to one of the HUB-485-4’s RS-485 outputs.
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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 converter. This is very helpful when you
are in doubt about the performance of your converter.
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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