Specifications

Communications
152
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Create Serial Ports Wherever You Need Them
Our USBS 1000 and 2000 serial communication converters
make it easy for computers with USB ports to communicate with
serial-port devices. All of the classic serial protocols are covered.
With the use of USBH series hubs (see our website), one downstream
USB port can support up to 16 serial ports.
USBS 1000 and 2000 converters allow you to establish serial
communications without ever opening up your computer case.
They also eliminate the need for such system resources as I/O
ports and IRQs to support serial communications. Both series of
USBS converters require a computer system that supports V1.1
USB both in hardware and operating system, and they come with
drivers for Windows
®
98/2000. Series 1000 converters also
include Windows XP drivers; WinNT4 drivers free upon request.
Both series automatically configure themselves. After you
install the included software, your computer automatically
recognizes all models and configures them. You can add or delete
any number of USBS converters without ever reconfiguring your
system or fussing with jumpers and DIP switches!
All our USBS models are powered from the USB cable, so you
need no additional power supplies. However, all USBS models
should normally be connected to a self-powered hub that can
supply 500 mA of current per port. Note that 16-port models
(USBS 1216 and USBS 1416) require two upstream USB ports.
Series 1000 for Surge Protection at Low Speeds
Some of our USBS series 1000 converters offer surge
protection for additional safety. We recommend these models
where speeds up to 230 kbps (total throughput) and buffers no
larger than 16 bytes are appropriate.
Series 2000 for High Speeds, Big Buffers
USBS series 2000 converters are recommended for applica-
tions where data rates in excess of 920 kbps are required, and
where buffer sizes of 128 bytes (TX) and 384 bytes (RX) help to
prevent lost data. Optical isolation on our one-port USBS 2401-I
also guards against ground loops and other stray voltages.
Troubleshooting procedures are described in the user’s
manual that accompanies each converter, and person-to-person
assistance is available from our expert application engineers.
Serial port
activity LEDs
USB
port
activity
LED
Control 8 or More Serial Devices from One USB Port!
#Ports Isolation
USB-Bus Serial Communications Converters
#USBS 0201 USB 1
RS-232 – 230.4kbps –––< 500@+5V 1x DB-9M 3.3-ft USB 2.2x1.3x0.8" 0
~
50°C Y – Y Y Y $49
#USBS 1201 USB 1
RS-232 – 230.4kbps – 16550 16 BYTES < 500@+5V 1x DB-9M 3.3-ft USB 2.2x1.4x0.7" 0
~
50°C Y  YYY $79
#USBS 221 USB 1 RS-232 – 460.8kbps – ASIC* 100@+5V 1x DB-9M 3-ft USB 2.1 x 1.4 x0.6" 0~50°C Y – Y Y Y $79
#USBS 1202 USB 2
RS-232  230.4kbps – 16550 16 BYTES < 500@+5V 2 x DB-9M 3.3-ft USB 6.1 x 4.3 x 1.5" 0~70°C Y  YYY $149
#USBS 1204 USB 4
RS-232  230.4kbps – 16550 16 BYTES < 500@+5V 4 x DB-9M 3.3-ft USB 9.1 x 5.4 x 1.6" 0~70°C Y  YYY $199
#USBS 1208 USB 8 RS-232  230.4kbps – 16550 16 BYTES < 500@+5V 8 x DB-9M 3.3-ft USB 9.2 x 5.3 x 2.4" 0~70°C Y  YYY $359
#USBS 1216 USB 16
RS-232  230.4kbps – 16550 16 BYTES < 1000 @ +5V 16 x DB-9M 3.3-ft USB 9.2 x 6.4 x 4.3" 0 ~ 70°C Y  YYY $799
#USBS 2401 USB 1
RS-422/485
(
530
)
– 921.6 kbps ASIC* 50@+5V 1xDB-25M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $129
#USBS 2401-I USB 1 RS-422/485
(
530
)
 921.6 kbps ASIC* 50@+5V 1xDB-25M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $139
#USBS 1402 USB 2
RS-422/485  230.4kbps 16550 16 BYTES < 500@+5V 2 x DB-9F 3.3-ft USB 6.1 x 4.3 x 1.5" 0~70°C Y  YYY $179
#USBS 2402 USB 2
RS-422/485 – 921.6 kbps ASIC* 500@+5V 2 x DB-9M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $189
#USBS 1404 USB 4 RS-422/485  230.4kbps 16550 16 BYTES < 500@+5V 4 x DB-9F 3.3-ft USB 6.1 x 4.3 x 1.5" 0~70°C Y  YYY $229
#USBS 2404 USB 4
RS-422/485 – 921.6 kbps ASIC* 500@+5V 4 x DB-9M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $239
#USBS 1408 USB 8
RS-422/485  230.4kbps 16550 16 BYTES < 500@+5V 8 x DB-9F 3.3-ft USB 9.0 x 6.5 x 2.5" 0~70°C Y  YYY $389
#USBS 2408 USB 8 RS-422/485 – 921.6 kbps ASIC* 4000 @ +5V 8 x DB-9M 6-ft USB 8.7 x 6.0 x 2.1" 0~50°C Y – Y Y – $449
#USBS 1416 USB 16
RS-422/485  230.4kbps 16550 16 BYTES < 1000@+5V 16 x DB-9F 3.3-ft USB 9.0 x 6.5 x 4.5" 0 ~ 70°C Y  YYY $829
#USBS 2602 USB 2
RS-232/422/485 – 921.6kbps ASIC* < 500@+5V 2 x DB-9M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $229
#USBS 2604 USB 4 RS-232/422/485 – 921.6 kbps ASIC* < 500@+5V 4 x DB-9M 6-ft USB 3.8 x 2.3 x1.0" 0~50°C Y – Y Y – $279
#USBS 2608 USB 8 RS-232/422/485 – 921.6 kbps ASIC* < 500@+5V 8 x DB-9M 6-ft USB 8.7 x 6.0 x 2.1" 0~50°C Y – Y Y – $499
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Full & Half
Duplex
128-Byte for TX
384-Byte for RX
Type(s) of Maximum RS-485 FIFO Power Req. Serial Included Dimensions Operating
Support:
Part Number Bus Ports Data Rates Modes UART Buffer (mA) Connector Cable (L x W x H") Temp. Price
98 NT4 2000 ME XP
 For surge protection, add suffix –S to part number and add $10 per serial port to price. Please note that surge suppression decreases maximum data rate to 115.2kbps.
 Windows NT4 drivers are available free upon request.  500~1000 V optical isolation.
*ASIC: USB/UART ASIC chip emulates 16850 for single-port units or 16854 for multiport units. Power Requirements: Power for these units comes from
the USB cable. These devices should be plugged into a root hub or a self-powered hub. Suitable USBH series self-powered hubs can be found on our website.
USB
1.1
port
DB-9
serial
ports
USBS
2401
DB-25
USBS 1000 Series: USB-to-Serial with Surge Protection
USBS 2000
Series Adapters
USBS
2401
Quantities of a Single Item Per Shipment –
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QUANTITY DISCOUNTS:1
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4/LIST 5
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9/5% 10
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24/10% 25+/CALL
USB
1.1
port
USBS 1204
DB-9
RS-232
ports
USBS 1204
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