SeaLevel COMM+4 3064 User manual

COMM+4™
USER’S MANUAL
Part Number 3064, 3065, 3066
Sealevel Systems, Inc Phone: [phone]
155 Technology Place Fax: [phone]
P.O. Box 830 www.sealevel.com
Liberty, SC 29657

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Sealevel Systems SIO-485 Page 1
Sections:
1. Installation
2. Address Selection
3. Interrupt Selection
4. Technical Description
5. Specifications
6. Warranty
Figures:
1. Address Table
2. Dipswitch S1 Illustration
3. Port Correlation Table
4. Connector Pin-Outs
5. Silk-Screen
6. Schematic
© Copyright 1995 Sealevel Systems Incorporated

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Sealevel Systems SIO-485 Page 2
SECTION 1. Installation
The COMM+4 can be installed in any of the PC expansion slots except J8 on the XT, and the
IBM Portable. First you must set the board base address and IRQ jumper. Remove the PC
case, remove the blank metal slot cover, and insert the board. The COMM+4 model you have
will determine how the cables are connected. Replace the screw, replace the case, and
installation is complete.
Ribbon Cables -These cables are routed through the slot opening and connected to the
board before the board is seated in the bus connector. The cables should be connected so
that the stripe is down, or toward the bottom, with the cables facing toward the rear of the PC.
Hang the attached cable bracket on the rear deck before tightening the case screws.
DB-9 Cables -Install the board in a slot, and then install the extra two cable bracket in the
slot toward the power supply from the board.
Spider Cable -Install the board in a slot, close the cover, and then install the DB-37
connector (Spider Cable) to the board.
SECTION 2. Address Selection
The COMM+4 board occupies 32 consecutive I/O locations. The dip-switch is used to set the
base address for these locations. Be careful when selecting the base address as some
selections conflict with existing PC ports. The following table shows several examples that
usually do not cause a conflict.
Address Switch Settings
12345
280-29F Off On Off On On
2A0-2BF Off On Off On Off
380-39F Off Off Off On On
3A0-3BF Off Off Off On Off
1A0-1BF OnOff Off On Off
2E0-2FF Off On Off Off Off
Figure 1
Address Selection Table
NOTE That 3A0-3BF cannot be used if the monochrome adapter is installed, as port
contention will result. The 2E0-2FF setting in conjunction with the IRQ 3 interrupt selection
will let the PC recognize COM2:(2F8 Hex) and COM4:(2E8 Hex).
The following illustration shows the correlation between the DIP-switch setting and the
address bits used to determine the base address. In the example below, the address 2E0
Hex is selected as a base. Address 2E0 in binary is XX 10 111X XXXX where X = a non-
selectable address bit.
1 2 3 4 5
ON
OFF
A9 A8 A7 A6 A5
Figure 2
DIP-Switch S1

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Sealevel Systems SIO-485 Page 3
Note that setting the switch “On” or “Closed” corresponds to a “0” in the address, while
leaving it “Off” or “Open” corresponds to a “1”.
Operating System Installation
For Windows Users
Start by choosing Install Software at the beginning of the CD. Choose
Asynchronous COM: Port Software, SeaCOM.
Other Operating Systems
Refer to the appropriate section of the Serial Utilities Software.

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Sealevel Systems SIO-485 Page 4
The following table shows which port is connected to which connector and the corresponding
address.
PORT # CONNECTOR
LOCATION ADDRESS EXAMPLE (BASE=280H)
1J1 BASE+0 280-287 HEX
2J2 BASE+8 288-28F HEX
3J3 BASE+16 290-297 HEX
4J4 BASE+24 298-29F HEX
Figure 3
Address to Connector correlation
SECTION 3. Interrupt Selection
The COMM+4 has an interrupt selection jumper which should be set prior to use. The
software you are using with the board will determine which interrupt, if any, is to be used. The
DOS interface software does not use interrupts, while interrupt buffer programs do. DOS and
BASIC do not require the interrupt to be set, while most multi-user operating systems will.
Consult the particular manual for the software that you are using to determine the proper
setting. The four interrupts are OR'ED together to form a single interrupt request (IRQ). This
signal is converted to "Open Collector Active High Pull-Up" allowing multiple COMM+4’s to
share the same IRQ line. The IRQ can be set at jumper E1 for IRQ 2, 3, 4, or 5. In the
following example the IRQ is set as IRQ 3.
2
3
4
E1
5
Figure 4
Header E1, IRQ Selection

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Sealevel Systems SIO-485 Page 5
SECTION 4. Technical Description
THE COMM+4 provides four RS-232 serial ports utilizing the 16550 UART. This chip features
programmable baud rate, data format, interrupt control and a 16 Byte input and output FIFO.
The COMM+4 is configured as four consecutively addressed UARTS with full RS-232 signal
drivers and receivers. The connector pinout is identical to the standard PC async adapter
pinout (see below).
Signal Name DB-25 DB-9Mode
TD Transmit Data 23Output
RD Receive Data 32Input
RTS Request To Send 47Output
CTS Clear To Send 5 8Input
DSR Data Set Ready 66Input
GND Ground 75
CD Carrier Detect81Input
DTR Data Terminal Ready 20 4Output
RI Ring Indicator 22 9Input
Figure 5
SECTION 5.
Specifications
Environmental Specifications
Specification Operating Storage
Temperature Range 0 -50 Degrees C
( 32 -122 Degrees F ) -20 -70 Degrees C ( -4 -158 Degrees F )
Humidity Range 0 -90% R.H. Non Condensing. 0 -90% Non
Condensing
Power Consumption
SUPPLY LINE +12 VDc -12 VDc +5 VDc
RATING(mA) 50 mA 50 mA 550 mA
Mean Time Between Failures (MTBF)
Greater Than 150,000 Hrs. (Calculated)

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Sealevel Systems SIO-485 Page 6
SECTION 6. Warranty
Sealevel Systems, Inc. provides a lifetime warranty for this product. Should this
product fail to be in good working order at any time during this period, Sealevel Systems will,
at its option, replace or repair it at no additional charge except as set forth in the following
terms. This warranty does not apply to products damaged by misuse, modifications,
accident or disaster.
Sealevel Systems assumes no liability for any damages, lost profits, lost savings or any
other incidental or consequential damage resulting from the use, misuse of, or inability to use
this product. Sealevel Systems will not be liable for any claim made by any other related
party.
Return authorization must be obtained from Sealevel Systems before returned
merchandise will be accepted. Authorization can be obtained by calling Sealevel
Systems and requesting a Return Merchandise Authorization (RMA) Number.
Sealevel Systems Incorporated
155 Technology Place
P.O. Box 830
Liberty, SC 29657 USA
[phone] FAX [phone]
E-mail: Internet: [email protected]
Please Refer To The Included Software For Any Post Production Manual Updates And
Application Specific Information.
Technical Support is available from 8 a.m. to 5 p.m. Eastern time.
Monday -Friday
COMM+4 is a trademark of Sealevel Systems, Inc.
“IBM” and “AT” are trademarks of the International Business Machines corporation.