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Summary of Contents for SeaLevel SeaPORT+2/485
- Page 1 SeaPORT+2/485 User Manual | 2202 © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021...
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Page 2: Table Of Contents
APPENDIX B – HOW TO GET ASSISTANCE ..................... 13 APPENDIX C – ELECTRICAL INTERFACE ......................14 APPENDIX D – ASYNCHRONOUS COMMUNICATIONS .................. 15 APPENDIX E – COMPLIANCE NOTICES ......................16 WARRANTY ................................ 18 © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021... - Page 3 Introduction The Sealevel Systems equips the PC with 2 USB to RS-422/485 Asynchronous serial ports providing a versatile interface for common serial needs. The advantage of this product over more traditional approaches is that it does not require opening the computer case, nor does it require resources such as I/O ports or IRQ’s.
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Page 4: Before You Get Started
Before You Get Started What’s Included The SeaPORT+2/485 is shipped with the following items. If any of these items is missing or damaged, contact the supplier. • SeaPORT+2/485 USB to RS-422/485 Serial I/O Adapter • USB Cable Part Number CA179 for Connecting to Upstream Host/Hub... -
Page 5: Installation Instructions
An uninstall option is included to remove the driver and all registry/INI file entries from your system. 6. Proceed with the physical installation of your SeaLINK USB serial adapter. Windows NT is not USB aware and thus cannot support this device. © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021... - Page 6 Windows. The SeaPORT+2/485 can be connected to any upstream type “A” port either at the PC host or an upstream hub. The SeaPORT+2/485 is hot pluggable, meaning there is no need to power down your computer prior to installation.
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Page 7: Configuration
When reassembling please note that the top and bottom are keyed to fit in only one direction. Electrical Interface Selection Each of the two ports on the SeaPORT+2/485 can be individually configured as an RS-422, or RS-485 interface. This is selectable via the DIP switches and DIP shunts. Each of the switch positions is described on the following page. - Page 8 ON : Adds a 1 K ohm pull-down resistor to RX- 422 and 485 option. OFF: No effect ON : Adds a 120 ohm termination resistor between RX+ and RX- © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021...
- Page 9 The receiver is disabled when the transmitter is enabled. In a two-wire setup the receiver will not echo back transmitted data. Switch positions 1 and 2 are for port 1 and switch positions 3 and 4 for port 2. © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021...
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Page 10: Technical Description
Technical Description The SeaPORT+2/485 utilizes two USB UARTs. These chips feature programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS-422/485 transceiver supports data rates up to 921.6K baud. Features •... -
Page 11: Specifications
Greater than 150,000 hours. (Calculated) Manufacturing All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel. Power Consumption This device is a high-power USB device. -
Page 12: Appendix A - Troubleshooting
4. When testing the SeaPORT+2/485 in loopback mode, you should see the port LED’s flashing as well as seeing echoed data on the screen. The loopback test first transmits a HEX pattern, 55AA, and then a ASCII string of data. If this test passes, then the SeaPORT+2/485 is ready for use in your application. -
Page 13: Appendix B - How To Get Assistance
If possible, please have the adapter connected in a computer ready to run diagnostics. 3. Sealevel Systems maintains a home page on the Internet. Our home page address is www.sealevel.com. The latest software updates, and newest manuals are available via our FTP site that can be accessed from our home page. -
Page 14: Appendix C - Electrical Interface
(Tx+ to Rx+ and Tx- to Rx-). Four wire mode allows full duplex data transfers. RS-485 does not define a connector pin-out or a set of modem control signals. RS-485 does not define a physical connector. © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021... -
Page 15: Appendix D - Asynchronous Communications
The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e., 9600,N,8,1. © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021... -
Page 16: Appendix E - Compliance Notices
Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives. © Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021... - Page 17 Caution Sealevel Systems, Inc. is not responsible for any radio or television interference caused by unauthorized modifications of this equipment or the substitution of attachment of connecting cables and equipment other than those specified by Sealevel Systems. Such unauthorized modifications, substitutions, or attachments may void the user’s authority to operate the equipment.
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Page 18: Warranty
Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is standard on all Sealevel manufactured I/O products. We are able to offer this warranty due to our control of manufacturing quality and the historically high reliability of our products in the field. Sealevel products are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product development, production, burn-in and testing.
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