SeaLevel 7202e User manual
Sealevel Systems, Inc. Sealevel.com 864-843-4343
Item# 7202e & 7202eS
©Sealevel Systems, Inc. 7202e Manual 1
SL9243 08/2013
CONTENTS ............................................................................................................................................................. 1
INTRODUCTION ..................................................................................................................................................... 2
BEFORE YOU GET STARTED .................................................................................................................................... 3
HARDWARE DESCRIPTION ..................................................................................................................................... 5
TECHNICAL DESCRIPTION ....................................................................................................................................... 6
SOFTWARE INSTALLATION ................................................................................................................................... 10
HARDWARE INSTALLATION.................................................................................................................................. 15
TECHNICAL SPECIFICATIONS ................................................................................................................................ 23
APPENDIX A –TROUBLESHOOTING...................................................................................................................... 24
APPENDIX B - HANDLING INSTRUCTIONS ............................................................................................................. 29
APPENDIX C –ELECTRICAL INTERFACE ................................................................................................................. 30
APPENDIX D –ASYNCHRONOUS COMMUNICATIONS .......................................................................................... 31
APPENDIX E –MECHANICAL DRAWING ............................................................................................................... 32
WARRANTY.......................................................................................................................................................... 33
©Sealevel Systems, Inc. 7202e Manual 2
SL9243 08/2013
The Sealevel COMM+232.PCIe (Item# 7202e) provides a PCI Express 1.0a compliant interface
adapter with two asynchronous RS-232 serial ports for industrial automation and control
applications and support data rates to 921.6K bps.
All modem control signals are implemented for maximum compatibility with a wide range of
serial peripherals. The Sealevel SeaCOM software driver and utilities make installation and
operation easy on the XP, Vista, Windows 7, and Windows 8 operating systems.
The 7202e ships with a low profile PC bracket for use in systems with a low profile PCI Express
slot. If you need a standard size PC bracket, order the 7202eS.
PCI Express two-port serial interface adapter
High performance 16C950 UART with 128-byte FIFOs
Each port supports data rates to 921.6K bps
Oscillator and clock prescalar support wide range of baud rates
Supports 9-bit protocol framing
PCI Express 1.0a compliant via X1 connector
Compatible with all low profile and standard size PCI Express slots
All modem control signals implemented in RS-232 mode
Includes 36” cable that terminates to two DB9M connectors
©Sealevel Systems, Inc. 7202e Manual 3
SL9243 08/2013
Depending on the PC bracket ordered, the 7202e is shipped with the following items. If any of
these items are missing or damaged, please contact Sealevel for replacement.
COMM+232.PCIe–Two-Port RS-232 Serial Interface
7202e –PCI Express Board with Low Profile PC Bracket
7202eS –PCI Express Board with Standard Height PC Bracket
CA203 –DB25F to (2) DB9M Cable, 36” in Length
Sealevel Software CD –SeaCOM software and user manual
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.
©Sealevel Systems, Inc. 7202e Manual 4
SL9243 08/2013
Depending upon your application, you are likely to find one or more of the following items
useful with the 7202e. All items can be purchased from our website (www.sealevel.com) by
calling our sales team at (864) 843-4343.
DB9F to DB25M (RS-232) Extension Cable (Item# CA177)
The CA177 is a standard AT-style RS-232 modem
cable with a DB9F connector on one end and a DB25M
connector on the other. This cable is 72 inches in
length.
DB9F to DB9M Extension Cable (Item# CA127)
The CA127 allows users to extend a DB9 cable up to
six feet. The connectors are pinned one-to-one so the
cable is compatible with any device or cable that has
DB9 connectors.
DB9F to RJ45 Modular Adapter (Item# RJ9S8)
The RJ9S8 is a DB9 female to RJ45 adapter. It can be
configured without tools and is an excellent choice for
using available infrastructure wiring.
©Sealevel Systems, Inc. 7202e Manual 5
SL9243 08/2013
The 7202e is a low profile PCI Express 1.0a compliant board via single-lane x1 slot. It can be
used in any single- or multi-lane PCI Express slot. It is available in standard height PCI Express
as item# 7202eS.
The board integrates a DB25 male connector for interfacing the two serial ports via the included
cable.
The 7202e ships with a two-port cable (Item# CA203) that includes a pair of DB9 male serial
connectors. The pin out for these connectors is detailed in the following Technical Description
section.
©Sealevel Systems, Inc. 7202e Manual 6
SL9243 08/2013
Each serial port utilizes a 16C950 UART featuring programmable baud rates, data format,
interrupt control and industry-leading 128-byte transmit and receive FIFOs. This high-
performance UART includes 9-bit framing support and is fully software compatible with legacy
16550 applications. In addition, the 14.7456 oscillator and UART’s flexible clock prescaler
supports the widest range of standard and non-standard baud rates to 921.6K bps. Refer to
Appendix C for cable length limitations.
The 7202e board includes a DB25 male connector for attaching the included cable (Item#
CA203). The pin out for the DB25M connector is shown in the table below.
Port 1 Pin#
Port 2 Pin#
RS-232
1
11
RD
2
12
CTS
3
13
DCD
4
14
TD
5
15
RTS
6
16
DSR
7
17
DTR
8
18
RI
9
10
GND
©Sealevel Systems, Inc. 7202e Manual 7
SL9243 08/2013
The 7202e includes a cable (Item# CA203) with a DB25 female connector terminating to a pair
of DB9 male connectors. The DB25F connector on the cable plugs into the DB25M connector on
interface board. The DB9M connectors are compatible with a variety of serial peripherals. The
pin assignments for the supported electrical interfaces are shown in the tables below.
These RS-232 pin assignments meet EIA/TIA/ANSI-574 DTE specifications for DB9 type
connectors.
Pin #
Signal
Name
Mode
1
DCD
Data Carrier Detect
Input
2
RD
Receive Data
Input
3
TD
Transmit Data
Output
4
DTR
Data Terminal Ready
Output
5
GND
Ground
6
DSR
Data Set Ready
Input
7
RTS
Request To Send
Output
8
CTS
Clear To Send
Input
9
RI
Ring Indicator
Input
Note: Please terminate any control signals that are not going to be used. The
most common way to do this is connect RTS to CTS and RI. Also, connect
DCD to DTR and DSR. Terminating these pins, if not used, will help insure
you get the best performance from your adapter.
©Sealevel Systems, Inc. 7202e Manual 8
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The 7202e utilizes a 14.7456MHz oscillator, which is automatically entered by the SeaCOM
driver under Windows 2000/XP/Vista/7 operating systems. The oscillator value can be found in
the COM port properties of Device Manager under the ‘Advanced Tab’.
The high-speed oscillator and the UART’s flexible clock prescaler support a wide range of
standard and non-standard baud rates. You simply need to select the appropriate baud rate in
your communications software and the driver will calculate the closest matching baud rate.
When you use the board in other operating systems, the baud rate you select is multiplied by
eight resulting in the actual, faster baud rate. This allows the board to achieve data rates to
921.6K bps.
The following table shows common baud rates and the baud rates you need to select in your
application running on operating systems other than Windows.
For this Data Rate
Choose this Data Rate
1200 bps
150 bps
2400 bps
300 bps
4800 bps
600 bps
9600 bps
1200 bps
19.2K bps
2400 bps
38.4K bps
4800 bps
57.6K bps
7200 bps
115.2 K bps
14.4K bps
230.4K bps
28.8K bps
460.8K bps
57.6 K bps
921.6K bps
115.2 K bps
©Sealevel Systems, Inc. 7202e Manual 9
SL9243 08/2013
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
768
2400 bps
384
4800 bps
192
9600 bps
96
19.2K bps
48
38.4K bps
24
57.6K bps
16
115.2K bps
8
230.4K bps
4
460.8K bps
2
921.6K bps
1
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