Catalog excerpts
US5= Q CI I IQD SEI to USB Adapter DIGITAL O d~UO □ Page 1 of 5 The SEI-USB is an interface module that connects US Digital's SEI compatible devices to a standard USB 1.1 / 2.0 port. The SEI (Serial Encoder Interface) bus is a network that connects up to 15 addressable SEI devices using a single 6-wire telephone-type cable up to 1000 feet long. The SEI bus uses two differential signalling pairs, one for busy flow control, and the other for bi-directional serial data (see the SEI data sheet). The SEI-USB will supply power from the USB port to a number of SEI devices on the bus (for example, five A2 encoders at a distance of 250 feet). The SEI-USB limits the power to the maximum design spec of the USB port. A red LED, next to the SEI connector, will be lit when additional power is required and the PS-12 power supply should then be used. A green LED, next to the USB connector, is lit when the USB connection is established with the host. ► USB 1.1 device communicates at 12 Mbit/sec ► Compatible with USB 2.0 hubs and host adapters ► USB drivers are included for Windows 7 / 8 ► Supports up to 15 total devices on the SEI bus ► Supports SEI bus lengths up to 1000 feet, depending on the number of devices attached. ► USB port on the PC provides power for the SEI-USB and SEI bus devices (120mA max using USB port power). ► Short-circuit power protection between the USB port and the SEI bus. ► Includes two LED indicators: green for USB power-sense and red to indicate additional external power is required. DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194
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US5= Q CI I IQD SEI to USB Adapter DIGITAL O d~UO □ Page 2 of 5r* Software ► www.usdigital.com/support/software/usb-com-port-driver ► www.usdigital.com/assets/USDProducts.zip (.zip file with installer) SEI Network SEI-USB Adapter DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194
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US5= Q CI I IQD SEI to USB Adapter DIGITAL O d~UO □ Page 3 of 5 Mechanical Drawing& Environmental Parameter Min. Typ. Max. Units Electrostatic Discharge, USB pins ± 15 kV Human Body Model Parameter Min. Typ. Max. Units Port / Pin Notes External Supply 8.5 12 16.0 V J3 The external supply is used when the USB port power (J1) is Voltage (optional) not adequate to provide sufficient power when a large number of SEI devices are connected to the SEI-USB. Current (optional) SEI-USB PWR Pin 8.0 9.5 10.5 V P1 /...
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US5= Q CI I IQD SEI to USB Adapter DIGITAL O d~UO □ Page 4 of 5Parameter Min. Typ. Max. Units Port / Pin Notes USB Port PWR Current, No <0.5 17 20 mA J1 / 1 SEI-USB device load only, no Devices devices attached. Devices Differential SEI Output Voltage 2.0 3.2 5.0 V P1 / 5, 6 - Differential SEI Input Voltage 0.2 - 5.0 V P1 / 2, 3 and P1 / - Voltage Common-mode SEI Input Voltage -4.5 - 3.0 V P1 / 2, 3 and P1 / - Data Rate 1.2 - 115.2 kBaud P1 / 5, 6 Virtual COM port speed....
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US5= Q CI I IQD SEI to USB Adapter DIGITAL O d~UO □ Page 5 of 5 PS-12 Power Supply DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194
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