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Summary of Contents for SeaLevel Ultra 485
- Page 1 Ultra 485™ User Manual | 3055 © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021...
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Page 2: Table Of Contents
APPENDIX B – HOW TO GET ASSISTANCE ..................... 18 APPENDIX C – ELECTRICAL INTERFACE ......................19 APPENDIX D – ASYNCHRONOUS COMMUNICATIONS .................. 20 APPENDIX E - COMPLIANCE NOTICES ......................21 WARRANTY ................................ 22 © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021... -
Page 3: Introduction
PLC communication, laboratory instrumentation, etc. The unique feature of the ULTRA 485 is the ability to be RS-485 compatible without the need for special software or drivers. This is especially useful in Windows, Windows NT, and OS/2 environments where the lower level I/O control is abstracted from the application program. -
Page 4: Before You Get Started
Before You Get Started What’s Included The Ultra 485 is shipped with the following items. If any of these items are missing or damaged, please contact Sealevel for replacement. • Ultra 485 Serial I/O Adapter Advisory Conventions Warning The highest level of importance used to stress a condition where damage could result to the product, or the user could suffer serious injury. - Page 5 Port # Base Address Electrical Specification RS-485 ‘Auto’ Port 1 To install the Ultra 485 using factory default settings, refer to Installation. For your reference, record installed Ultra 485 settings below: Port # Base Address Electrical Specification © Sealevel Systems, Inc.
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Page 6: Card Setup
RS-485 Auto Mode or Sealevel Systems’ serial driver. The ULTRA 485 occupies 8 consecutive I/O locations and looks to the PC as a standard serial port. A DIP- switch (SW1) is used to set the port address options for the ULTRA 485. Be careful when selecting the port addresses as some selections may conflict with existing ports. - Page 7 Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting at header E1 and setting the appropriate selections at E2. Consult your particular software for IRQ selection. If no interrupt is desired, remove the jumper. © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021...
- Page 8 Figure 2 - Header E2, Normal IRQ Mode Set the jumper to ‘S’ if you are using more than one ULTRA 485 in a bus or to completely remove the pull- down resistor for hardware compatibility. Setting the adapter in this configuration when it is not accompanied by a pull-down resistor will prevent the ports from triggering an interrupt.
- Page 9 Some communication software packages refer to RS-485 as RTS enable or RTS block mode transfer. One of the unique features of the ULTRA 485 is the ability to be RS-485 compatible without the need for special software or drivers. This ability is especially useful in Windows, Windows NT, and OS/2 environments where the lower level I/O control is abstracted from the application program.
- Page 10 Header E3 is in the 422 mode. These header blocks are described in the illustration and table that follow. AUTO Receiver automatically enabled/disabled Receiver enabled by UART RTS signal Receiver always enabled Figure 5 - Header E3 RS-485 Receive Mode © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021...
- Page 11 DIP-shunt E4 selects the pin out for the DB-25 connector P3. With the 5 position shunt in the EIA-530 mode, the ULTRA 485 complies with the EIA-530 pin out with the following signals supported: Figure 6 - DIP-shunt E4 (EIA-530 Mode)
- Page 12 Each switch position corresponds to a specific portion of the interface. If multiple ULTRA 485 adapters are configured in a RS-485 network, only the boards on each end should have switches T, P & P ON. Refer to the following table for each position’s operation:...
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Page 13: Software Installation
6. Proceed with the physical installation of your SeaLINK USB serial adapter. Windows NT is not USB aware and thus cannot support this device. Other Operating Systems Refer to the appropriate section of the Serial Utilities Software System Installation. © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021... -
Page 14: Hardware Installation
Hardware Installation The ULTRA 485 can be installed in any of the PC expansion slots. The ULTRA 485 contains several jumper straps for each port that must be set for proper operation. 1. Turn off PC power. Disconnect the power cord. -
Page 15: Technical Description
16-byte input and output FIFO. A full array of advanced UARTS is also available. The unique feature of the ULTRA 485 is the ability to be RS-485 compatible without the need for special software or drivers. This is especially useful in Windows, Windows NT, and OS/2 environments where the lower level I/O control is abstracted from the application program. -
Page 16: Specifications
10 to 90% R.H. Non-Condensing 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... -
Page 17: Appendix A - Troubleshooting
No two adapters can occupy the same I/O address. 3. Make sure the Sealevel Systems adapter is using a unique IRQ. The IRQ is typically selected via an on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and IRQ. -
Page 18: Appendix B - How To Get Assistance
If possible, please have the adapter installed in a computer ready to run diagnostics. 3. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many common questions. This section can be found at http://www.sealevel.com/faq.asp. -
Page 19: Appendix C - Electrical Interface
The RS-530 specification defines two types of interface circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The Sealevel Systems adapter is a DTE interface. RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. -
Page 20: 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). © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021... -
Page 21: 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. © Sealevel Systems, Inc. 3055 Manual | SL9139 6/2021... -
Page 22: 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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