SeaLevel ULTRA 485.PCI User manual

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
ULTRA 485.PCI
User Manual | 7105

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
CARD SETUP........................................................................................................................................................................................................................5
INSTALLATION.....................................................................................................................................................................................................................8
PHYSICAL INSTALLATION...............................................................................................................................................................................................10
TECHNICAL DESCRIPTION...............................................................................................................................................................................................11
SPECIFICATIONS...............................................................................................................................................................................................................12
APPENDIX A –TROUBLESHOOTING..........................................................................................................ERROR! BOOKMARK NOT DEFINED.
APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................13
APPENDIX C –ELECTRICAL INTERFACE......................................................................................................................................................................15
APPENDIX D –ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................16
APPENDIX E –SILK SCREEN ...........................................................................................................................................................................................17
APPENDIX F –COMPLIANCE NOTICES.........................................................................................................................................................................18
WARRANTY ........................................................................................................................................................................................................................19
...................................................................................................................................................................................................................................................

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Introduction
Overview
The Sealevel Systems ULTRA 485.PCI is a one channel PCI Bus serial I/O adapter. It provides one field
selectable RS-422/485/530 serial port supporting asynchronous data rates up to 460.8K bps.
Choose the RS-422 mode for long distance device connections up to 4000ft. where noise immunity and
high data integrity are essential. Select RS-485 and capture data from multiple peripherals in a RS-485 multi-
drop network. Up to 31 RS-485 devices can be connected to each port to automate your data collection.
In RS-485 mode, our special auto-enable feature allows the RS-485 ports to be viewed by the operating
system as a COM: port. This allows the standard COM: driver to be utilized for RS-485 communications.
Our on-board hardware automatically handles the RS-485 driver enable.

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Before You Get Started
What’s Included
The ULTRA 485.PCI is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
•ULTRA 485.PCI 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.
Important
The middle level of importance used to highlight information that might not seem obvious or a
situation that could cause the product to fail.
Note
The lowest level of importance used to provide background information, additional tips, or other
non-critical facts that will not affect the use of the product.

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Card Setup
RS-485 Enables Modes
RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state driver that will allow the
electrical presence of the driver to be removed from the line. The driver is in a tri-state or high impedance
condition when this occurs. Only one driver may be active at a time and the other driver(s) must be tri-
stated. The output modem control signal Request To Send (RTS) is typically used to control the state of
the driver. 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.PCI is the ability to be RS-485 compatible without the need
for special software or drivers. This ability is especially useful in Windows and OS/2 environments where
the lower level I/O control is abstracted from the application program. This ability means that the user can
effectively use the ULTRA 485.PCI in an RS-485 application with existing (i.e., standard RS-232) software
drivers.
Switch SW2 is used to control the RS-485 mode functions for the driver circuit. The selections are:
‘Auto’ enable (silk-screen ‘AT’). The ‘Auto’ enable feature automatically enables/disables the RS-485
interface via on board circuitry.
‘RTS’ enable (silk-screen ‘RT’) The ‘RTS’ mode uses the ‘RTS’ modem control signal to enable the RS-485
interface and provides backward compatibility with existing software products.
‘No Echo’ (silk-screen ‘NE’) is used to control the RS-485 enable/disable functions for the receiver circuit
and determine the state of the RS-422/485 driver. The RS-485 ‘Echo’ is the result of connecting the receiver
inputs to the transmitter outputs. Every time a character is transmitted; it is also received. This can be
beneficial if the software can handle echoing (i.e., using received characters to throttle the transmitter) or
it can confuse the system if the software does not. To select the ‘No Echo’ mode select silk-screen position
‘NE.’
Clock Modes
The ULTRA 485.PCI employs a unique clocking option that allows the end user to select from divide by 4
and divide by 1 clocking modes. SW2 positions 1 and 2 select the Divide by 1 (silk-screen D1) and Divide
by 4 (silk-screen D4) modes.
To select the Baud rates commonly associated with COM: ports (i.e., 2400, 4800, 9600, 19.2, … 115.2K Bps )
set switch SW2 in the divide by 4 mode (silk-screen D4).
To select the maximum data rate up to 460.8K bps set switch SW2 in the divide by 1 (silk-screen D1)
position. Please refer to the following page for these additional data rates.
Do not set both switches on or invalid clocking will occur.

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
RS-485 Mode and Clock Mode Examples (Switch SW2)
Figure 1- Switch SW2, RS-422, Divide by 4
Figure 2 –Switch SW2, RS-485 ‘Auto’ Enabled, with ‘No Echo’ Divide by 4
Figure 3 - Switch SW2, RS-485 ‘Auto’ Enabled, with ‘Echo’ Divide by 4
Baud Rates and Divisors for the 'Div1' Mode
The following table shows some common data rates and the rates you should choose to match them if
using the adapter in the ‘Div1’ mode.
For this Data Rate
Choose this Data Rate
1200 bps
300 bps
2400 bps
600 bps
4800 bps
1200 bps
9600 bps
2400 bps
19.2K bps
4800 bps
57.6 K bps
14.4K bps
115.2 K bps
28.8K bps
230.4K bps
57.6 K bps
460.8K bps
115.2 K bps
1 2 3 4
ON
OFF 5
D
1D 4A TR TN E
1 2 3 4
ON
OFF 5
D
1D 4A TR TN E
1 2 3 4
ON
OFF 5
D
1D 4A TR TN E

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
If your communications package allows the use of Baud rate divisors, choose the appropriate divisor from
the following table:
For this Data Rate
Choose this Divisor
1200 bps
384
2400 bps
192
4800 bps
96
9600 bps
48
19.2K bps
24
38.4K bps
12
57.6K bps
8
115.2K bps
4
230.4K bps
2
460.8K bps
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Address and IRQ Selection
The ULTRA 485.PCI is automatically assigned resources by your motherboard BIOS. Only the I/O address
may be modified by the user.
Adding or removing other hardware may change the assignment of I/O addresses and IRQs.
Line Termination
Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive
end only). A 120-ohm resistor is across each RS-422/485 input in addition to a 1K-ohm pull-up/pull-down
combination that biases the receiver inputs. Switch SW1 allows customization of this interface to specific
requirements. Each switch position corresponds to a specific portion of the interface. If multiple ULTRA
485.PCI adapters are configured in an 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:
Name
Function
T
Adds or removes the 120 ohm termination.
P
Adds or removes the 1K ohm pull-down resistor in the RS-422/RS-
485 receiver circuit (Receive data only).
P
Adds or removes the 1K ohm pull-up resistor in the RS-422/RS-
485 receiver circuit (Receive data only).
L
Connects the TX+ to RX+ for RS-485 two-wire operation.
L
Connects the TX- to RX- for RS-485 two-wire operation.
Figure 4 - Switch SW1, Line Termination
1 2 3 4
ON
OFF 5
P P T L L

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Installation
Software Installation
Windows Installation
Do not install the Adapter in the machine until the software has been fully installed.
Only users running Windows 7 or newer should utilize these instructions for accessing and
installing the appropriate driver via Sealevel’s website. If you are utilizing an operating system
prior to Windows 7, please contact Sealevel by calling 864.843.4343 or emailing
[email protected]om to receive access to the proper driver download and installation
instructions.
1. Begin by locating, selecting, and installing the correct software from the Sealevel software
driver database.
2. Type in or select the part number (#7105) for the adapter from the listing.
3. Select “Download Now” for SeaCOM for Windows.
4. The setup files will automatically detect the operating environment and install the proper
components. Follow the information presented on the screens that follow.
5. A screen may appear with text similar to: “The publisher cannot be determined due to the
problems below: Authenticode signature not found.” Please click the ‘Yes’ button and
proceed with the installation. This declaration simply means that the operating system is
not aware of the driver being loaded. It will not cause any harm to your system.
6. During setup, the user may specify installation directories and other preferred
configurations. This program also adds entries to the system registry that are necessary
for specifying the operating parameters for each driver. An uninstall option is also included
to remove all registry/INI file entries from the system.
7. The software is now installed, and you can proceed with the hardware installation.

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Linux Installation
You MUST have “root” privileges to install the software and drivers.
The syntax is case sensitive.
SeaCOM for Linux can be downloaded here: https://www.sealevel.com/support/software-seacom-linux/.
It includes the README and the Serial-HOWTO help files (located at seacom/dox/howto). This series of
files both explains typical Linux serial implementations and informs the user about Linux syntax and
preferred practices.
User can use a program such as 7-Zip to extract the tar.gz file.
In addition, the software selectable interface settings can be accessed by referencing
seacom/utilities/7105mode.
For additional software support, including QNX, please call Sealevel Systems’ Technical Support, (864) 843-
4343. Our technical support is free and available from 8:00 AM - 5:00 PM Eastern Time, Monday through
Friday. For email support contact: su[email protected]om.

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© Sealevel Systems, Inc. 7105 Manual | SL90527/2021
Physical Installation
The adapter can be installed in any 5V PCI expansion slot and contains several jumper straps for each port
that must be set for proper.
Do not install the Adapter in the machine until the software has been fully installed.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available PCI slot and remove the blank metal slot cover.
4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated properly.
5. Replace the screw. (This is required to ensure FCC Part 15 compliance.)
6. Replace the cover.
7. Connect the power cord.
Installation is finished.