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USB-4COMi-SI-M USB to Quad Opto-isolated RS-422/485 Serial Adapter Manual
The USB to Industrial Quad RS-422/485 Adapter is designed to make
industrial communication port expansion quick and simple.
Connecting to a USB port on your computer or USB hub, the USB to
Industrial Quad RS-422/485 Adapter instantly adds four industrial
communication ports to your system. By taking advantage of the USB
bus, the USB Industrial Quad RS-422/485 Adapter makes it easier than
ever to add RS-422 or RS-485 device to your system with easy plug-
and-play and hot plug features. Adapting the new technology, the
industrial I/O communication port expansion now takes the new bus
with easy and convenient connectivity.
The USB to Industrial Quad RS-422/485 Adapter provides instant
connectivity to four RS-422/485 communication devices for factory automation equipment, multi-drop data collection
devices, barcode readers, time clocks, scales, data entry terminals, PC to PC long distance communications and serial
communication in harsh environments. The USB Industrial I/O provides industrial solution for applications requiring
single node or multi-drop communications over short and long distance.
Optical Isolation and Surge Protection
Optical isolation and surge protection are available to this product USB-4COMi-SI-M.
Each RS-422/485 port is individually optically isolated with 2000 Volt DC optical isolation. The optical isolation protects
your PC or notebook from spikes and surges on the RS-422/485 network, by converting the electrical pulse into an
optical signal and then changing it back into an electrical pulse. Your computer is well protected, since the surges and
spikes cannot cross the optical link.
Each RS-422/485 port is individually protected by surge protector to withstand electrostatic discharge and power surges
up to 25KV ESD. Surge suppression on all signals prevent from damages caused by lightning or high voltage.
Features
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Adds quad high speed RS-422 / 485 ports via USB connection
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Each RS-422/485 port is individually optically isolated with 2000 Volt DC optical isolation.
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Each RS-422/485 port is individually protected by surge protector to withstand electrostatic discharge and
power surges up to 25KV ESD.
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384 byte receive buffer
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128 byte transmit buffer for high speed data throughput
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Requires no IRQ, DMA, I/O port
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Data rates: 300 bps to 1M bps
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Serial Connector: four DB-9 male connectors
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Auto transmit buffer control for 2-wire RS-485 half-duplex operation
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Termination resistors installed on-board.
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RS-422 data signals: TX-, TX+, RX+, RX-, GND, RTS-, RTS+, CTS+, CTS-
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RS-485 data signals: Tx-, Tx+, Rx+, Rx-(4 wire) and data-, data+ (2 wire).
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Monitor LEDs of TxD, RxD indicating port status
