ICP DAS USA I-7514U User manual

I-7514U 4 Channels RS-485 Active Hub - QuickStart (Jan/2017)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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I-7514U
Isolated 4 Channels RS-485 Active Hub
Quick Start Guide
Product Website:
http://www.icpdas-usa.com/i_7514u.html
1. Introduction
RS-485 Active Hub
The I-7514U is a 4-ch RS-485 active star wiring hub, it has 4 independent RS-485
output channels and one RS-485 input channel. Each output channel
is equipped with an individual driver. The data from a master to the input channel will
simultaneously be forwarded to all the four output channels.
Baud Rate Setting
The I-7514U provides 2 modes of baud rate setting, one is Self-Tuner mode and the
other is fi xed baud rate mode. The Self-Tuner mode can support
Multiple Baud Rate and Multiple Data Format. The Self-Tuner design is exactly the
same as I-7513 and I-7510 series. The Fixed baud rate mode offers a
better quality for data transmission over long or lossy lines or electrically noisy
environments.
RS-485 Short-Circuit
The Short-circuit protection can automatically shut off the breakdown channel, this kind
of design can suffi ce to protect the communication system.
When a connected RS-485 equipment breaks down, the breakdown channel will be
isolated to ensure that other equipments work normally.
Termination resistors
In some critical environments, you may need to add termination resistors to prevent the
refl ection of serial signals. The I-7514U includes a 120 Ω
termination resistor for each channel by jumper selectable (Default disable).
LED Indicators
The I-7514U has 6 LED to indicate the power status and network traffi c. The TxD/RxD
LED will flash when the unit is being sent out or received data.

I-7514U 4 Channels RS-485 Active Hub - QuickStart (Jan/2017)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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2. Application
3. Block Diagram

I-7514U 4 Channels RS-485 Active Hub - QuickStart (Jan/2017)
ICP DAS USA, Inc. | www.icpdas-usa.com | 1-310-517-9888 | 24309 Narbonne Ave. Suite 200. Lomita, CA 90717
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4. Pin Assignment and Settings