Impulse 4030 User Manual

PIO-48 User Manual

Part Number 4030

www.sealevel.com PO Box 830 Liberty, SC 29657 864.843.4343

Table of Contents

INTRODUCTION......................................................................................................................... 1

OTHER SEALEVEL ISA DIGITAL I/O PRODUCTS .......................................................................... 1

BEFORE YOU GET STARTED................................................................................................. 2

WHAT’S INCLUDED ...................................................................................................................... 2

OPTIONAL ITEMS.......................................................................................................................... 2

CARD SETUP ............................................................................................................................... 4

ADDRESS SELECTION ................................................................................................................... 4

WAIT STATES............................................................................................................................... 5

INTERRUPT HEADERS J5 AND J6 .................................................................................................. 5

OPTIONAL CABLE CONNECTOR P4............................................................................................... 5

SOFTWARE INSTALLATION.................................................................................................. 6

PHYSICAL INSTALLATION .................................................................................................... 8

DIGITAL I/O INTERFACE........................................................................................................ 9

50-PIN HEADER CONNECTORS ..................................................................................................... 9

PROGRAMMING THE PIO-48 ............................................................................................... 10

PROGRAMMING FOR WINDOWS .................................................................................................. 10

PROGRAMMING FOR LINUX........................................................................................................ 10

DIRECT HARDWARE CONTROL .................................................................................................. 10

READING THE INPUTS................................................................................................................. 10

READING THE OUTPUTS ............................................................................................................. 10

PRESETTING AN OUTPUT PORT .................................................................................................. 11

WRITING THE OUTPUTS ............................................................................................................. 11

REGISTER DESCRIPTION ............................................................................................................. 11

I/O CONTROL WORD ................................................................................................................. 12

ELECTRICAL CHARACTERISTICS .................................................................................... 13

PECIFICATIONS ......................................................................................................................... 13

S

EXAMPLE CIRCUITS.............................................................................................................. 14

APPENDIX A - TROUBLESHOOTING ................................................................................. 15

APPENDIX B - HOW TO GET ASSISTANCE ...................................................................... 16

APPENDIX C – SILK SCREEN – 4030 PCB .......................................................................... 17

APPENDIX D - COMPLIANCE NOTICES............................................................................ 18

F

EDERAL COMMUNICATIONS COMMISSION STATEMENT ........................................................... 18

WARRANTY............................................................................................................................... 19

© Sealevel Systems, Inc.
SL9029 Revision 7/2006

PIO-48 User Manual

Introduction

The PIO-48 part number 4030 digital I/O interface provides 48 channels of buffered
drive digital I/O emulating 8255 mode zero. The PIO-48 can be utilized for a variety
of control and automation applications including control and monitoring of TTL
devices (e.g. LEDs, small solenoids, small relays) and interfacing to solid-state relay
racks (SSRs) for high-power AC or DC loads.

The PIO-48’s 48 digital I/O channels are accessed via two 50-pin header connectors
with industry-standard pin out. Each header provides 24 bits of digital I/O divided
into three eight-bit groups. Each eight-bit group may be individually configured via
software command as input or output to best match your particular application
requirements.

The PIO-48 is designed to be used with a variety of Operating Systems including
Windows 98/NT/ME/2000/XP, Linux and DOS. The SeaI/O API (Application
Programmer Interface) included on CD with the PIO-48 provides a variety of useful
high-level function calls implemented as a Windows dynamic link library (DLL) and
as a Linux kernel module and library. In addition to the API, SeaI/O includes
sample code and utilities to simplify software development.

Other Sealevel ISA Digital I/O Products

DIO-16 (P/N 3096) - 8 Reed Relay Outputs / 8 Opto-Isolated Inputs

ISO-16 (P/N 3094) - 16 Optically Isolated Inputs

REL-16 (P/N 3095) - 16 Reed Relay Outputs

DIO-32B (P/N 3093) - 16 Reed Relay Outputs / 16 Opto-Isolated

Inputs

REL-32 (P/N 3098) - 32 Switched Relay Outputs

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PIO-48 User Manual

Before You Get Started

What’s Included

The PIO-48 is shipped with the following items. If any of these items is missing or
damaged please contact Sealevel for replacement.

 PIO-48 Adapter
 Sealevel SeaI/O Software CD

Optional Items

Depending upon your application, you are likely to find one or more of the
following items useful for interfacing the PIO-48 to real-world signals. All items can
be purchased from our website (http://www.sealevel.com

4343.

For TTL applications:

 Terminal Block Kit - (Part Number KT107)

− Kit includes the TB07 screw terminal block and CA167 ribbon cable

for connecting one of the PIO-48’s 50-pin header connectors to your
I/O. 6” Snap track and DIN rail clips are included for DIN rail
mounting.

) or by calling (864) 843-

 IDC 50 to IDC 50 Pin 40" Ribbon Cable (Part Number CA167)

− Interfaces each of the PIO-48’s 50-pin header connectors.

 Simulation/debug module (Part Number TA01)

− Module allows monitoring status of output pins and controlling state

of input pins. An LED corresponding to each port bit illuminates to
indicate state. Eight position DIP-switches are used to generate input
status changes.

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PIO-48 User Manual

For high-current, high-voltage applications:

 IDC 50 to IDC 50 Pin Ribbon Cable (Part Number CA167)

− 40” cable connects the PIO-48 to solid-state relay racks equipped

with 50-pin header interface.

 IDC 50 to IDC 50 Pin Ribbon Cable (Part Number CA135)

− 40” cable connects the PIO-48 to solid-state relay racks equipped

with 50-pin edge connector.

 Solid-State Relay Racks:

• Quad six position relay rack (Part Number PB24HQ)

− Relay rack can accept up to six QSSRs for a total of 24 channels.

Features a 50-pin header connector for easy interface via 50­conductor ribbon cables.

• Quad four position relay rack (Part Number PB16HQ)

− Relay rack can accept up to four QSSRs for a total of 16 channels.

Features a 50-pin header connector for easy interface via 50­conductor ribbon cables.

 Quad Solid-State Relay Modules:

• AC Input (Part Number IA5Q) - Provides 4 channels of discrete I/O

interface to monitor AC inputs up to 140V @ 10mA.

• DC Input (Part Number IB5Q) - Provides 4 channels of discrete I/O

interface to monitor DC inputs from 3.3V to 32V.

• AC Output (Part Number OA5Q) - Provides 4 channels of discrete I/O

interface to control AC outputs up to 140V @ 3A.

• DC Output (Part Number OB5Q) - Provides 4 channels of discrete I/O

interface to control DC outputs up to 60V @ 3A.

 Simulation/debug module (Part Number TA01)

− Module simulates the operation and load characteristics of a standard

24-channel relay rack. An LED corresponding to each port bit
illuminates to indicate state. Eight position DIP-switches are used to
generate input status changes.

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PIO-48 User Manual

Card Setup

The PIO-48 contains several jumper straps for each port that must be set for proper
operation.

Address Selection

The PIO-48 occupies 8 consecutive I/O locations. Dip-switch SW1 sets the
base address for the PIO-48. 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 Binary Switch Settings

1 2 3 4 5 6 7 8

280-287 10 1000 0XXX Off On Off On On On On On

2A0-2A7 10 1010 0XXX Off On Off On Off On On On

2E8-2EF 10 1110 1XXX Off On Off Off Off On Off On
2F8-2FF 10 1111 1XXX Off On Off Off Off Off Off On
3E8-3EF 11 1110 1XXX Off Off Off Off Off On Off Off

300-307 11 0000 0XXX Off Off On On On On On Off
328-32F 11 0010 1XXX Off Off On On Off On Off On
3F8-3FF 11 1111 1XXX Off Off Off Off Off Off Off On

Typically COM1: = 3F8h; COM2: = 2F8h; COM3: = 3E8h; COM4: = 2E8h.

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, address
300 is selected as the base address. Address 300 in binary is 10 0000 XXX where X
= a non-selectable address bit and address bit A9 is always a 1.

Address Selection Table

DIP-Switch Illustration

Note: Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the address, while
leaving it ‘Off’ or ‘Open’ corresponds to a ‘1’.

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PIO-48 User Manual

Wait States

The PIO-48 has the option of inserting one 500 nS wait state for each access. This
may be required on certain machines with bus clocks in excess of 8 MHz. With the
wide variety of machines available, no concrete rules exist concerning wait states. If
the PIO-48 doesn't seem to be responding properly, try inserting a wait state.

To enable wait state insertion, set position 8 of the dip-switch to "ON". To disable
wait states, set position 8 "OFF".

Interrupt Headers J5 and J6

The headers marked J5 and J6 allow the use of interrupts with the parallel ports. J5
selects IRQ2 through IRQ7 for Port 1 (U9 and J1), while J6 selects the IRQ for Port
2 (U16 and J3).

Optional Cable Connector P4

Discrete access to both sides of all relays is provided by attaching the
optional cable (CA-108) to pin header P4 with the colored edge of the ribbon
cable attached to pin one. Removing all the jumpers connecting row P1 to P2
places the A-side of each relay at the on-board DB-37 and the B-side at the
optional cable’s DB-37.

IRQ Header E2

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PIO-48 User Manual

Software Installation

Windows 98/ME/2000/XP Installation

1. Start Windows.

2. Insert the Sealevel Systems CD in to your CD drive.

3. If ‘Auto-Start’ is enabled for this drive the software will automatically
launch. Otherwise, point your browser to the ‘Index.htm’ on the root
directory of the CD

4. Select ‘Install Software’.

5. Select the Part Number for your adapter from the listing.

6. Select ‘Windows 98/ME/2000/XP’. The setup file will automatically detect
the operating environment and install the proper components. Next
(depending on your browser) select the ‘Run this program from its current
location’ or ‘Open’ option. Follow the information presented on the screens
that follow.

7. A screen may appear with the declaration: “The publisher cannot be
determined due to the problems below: Authenticode signature not found.”
Please select 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.

8. 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.

Windows NT Card Installation: After accomplishing the above steps, bring up the
Control Panel and double-click on the SeaIO Devices icon. To install a new card,
click "Add Port". Repeat this procedure for as many SeaIO cards as you wish to
install.

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PIO-48 User Manual

Linux Installation

Note: You MUST have "root" privileges to install the software and drivers.

Note Your cdrom may not be /dev/hdc it could be /dev/hda, /dev/hdb, /dev/hdd, or if

you have a SCSI drive /dev/sda, /dev/sdb, /dev/sdc, etc. You may mount the
CDROM to any location, the /cdrom is just a common example.

Note: The syntax is case sensitive.

1. Login as "root".

2. Mount the CDROM by typing:

mount -t iso4860 /dev/hdc /cdrom

3. Next change to the directory where you mounted the CDROM:

Ex. cd /cdrom/software/SeaIO/Other/linux

4. Copy seaio .tar.gz to your home directory by typing:

cp seaio .tar.gz ~

5. Change to your home directory by typing:

cd

6. Unmount the drive and then Unzip and Untar the drivers and software by
typing:

umount /cdrom

tar -xvzf seaio .tar.gz

7. Change to the SeaIO directory by typing:

cd SeaIO

8. Now compile and prepare the drivers for use:

make install

9. With the system off and unplugged, install your SeaIO PCI card.

10. Plug system back in and boot Linux.

Login as "root".

11. Load the driver by typing:

SeaIO -load

The driver has enabled the card and is ready to use, and you now have the option to
run a test utility on it. Skip to section "Using the test software" if you wish to do so
at this time.

To set up Linux to automatically load the driver; refer to a Linux manual concerning
your specific distribution for help.

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PIO-48 User Manual

Physical Installation

The adapter can be installed in any 5V PCI expansion slot.

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 5V 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. After the adapter has been installed, the cables should be routed thru the
opening in the bracket. This bracket also features a strain relief function that
should be used to prevent un-expected cable removal.

6. Replace the screw you removed for the blank and use it to secure the adapter
into the slot. (This is required to ensure FCC Part 15 compliance.)

7. Replace the cover.

8. Connect the power cord

The PIO-48 is now ready for use.

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PIO-48 User Manual

Digital I/O Interface

The PIO-48’s 48 digital I/O channels are accessed via two industry-standard 50-pin
header connectors. Each header provides 24 bits of digital I/O divided into three
eight-bit ports. Each port may be individually configured via software command as
input or output.

50-pin Header Connectors

You will need to install the bracket assembly and cables to the PIO-48 prior to
installing it in the PC. The PIO-48’s bracket features a unique cable clamp that
provides a solid strain relief to prevent inadvertent cable removal.

Both of the 50-pin connectors has the following pin out which is compatible with a
wide variety of solid state relay racks:

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PIO-48 User Manual

Programming the PIO-48

Sealevel’s SeaI/O software is provided to assist in the development of reliable
applications for the Sealevel Systems family of digital I/O adapters. Included on the
SeaI/O CD are driver functions for use in accessing the I/O as well as helpful
samples and utilities.

Programming for Windows

The SeaI/O API (Application Programmer Interface) provides a variety of useful
high-level function calls implemented in a Windows dynamic link library (DLL).
The API is defined in the help file (Start/Programs/SeaIO/SeaIO Help) under
“Application Programmers Interface”. This help file also includes detailed
information dealing with installation / removal of the software and information
about latency, logic states, and device configuration.

For C language programmers we recommend using the API to access the PIO-48. If
you are programming in Visual Basic, using the ActiveX control included with
SeaI/O is advised.

Samples and Utilities

A variety of sample programs and utilities (both executable and source code) are
included with SeaI/O. Further documentation on these samples can be found by
selecting “Start/Programs/SeaIO/Sample Application Description”. Information
about where the files are physically stored on your disk is also included in this same
file.

Programming for Linux

SeaI/O for Linux consists of two major parts: a kernel module and a library. The
kernel module is a simple IO pass-through device, allowing the library to handle the
more sophisticated functions provided to SeaI/O users. It is provided in a ‘tarball’
format and can easily be compiled and included in the kernel build.

Direct Hardware Control

In systems where the users program has direct access to the hardware (DOS) the
tables that follow give the mapping and functions that the PIO-48 provides.

Reading the Inputs

The inputs are active true. If an input is driven high (2V to 5.25 V) it will read as a
logical one, if driven low (0V to 0.8V) it will read as a logical zero. If an input is not
driven it will read as a one due to the 10K ohm pull up resistors on each port.

Reading the Outputs

The value that is currently being used to drive the outputs will be returned.

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PIO-48 User Manual

Presetting an Output Port

Each port has an output register associated with it. This register may be written and
retains its value whether the port is configured as an input or an output. To preset the
value of an output port the program should write to the port when it is configured as
an input then configure it as an output.

Writing the Outputs

The outputs are active true. Writing a one (1) corresponds to 5V while writing a zero
(0) corresponds to 0V, at the output.

Register Description

Address Mode D7 D6 D5 D4 D3 D2 D1 D0

Base+0
Base+1
Base+2
Base+3
Base+4
Base+5
Base+8

Base+9
Base+A
Base+B
Base+C

Port A1 RD/WR PA1D7 PA1D6 PA1D5 PA1D4 PA1D3 PA1D2 PA1D1 PA1D0
Port B1 RD/WR PB1D7 PB1D6 PB1D5 PB1D4 PB1D3 PB1D2 PB1D1 PB1D0
Port C1 RD/WR PC1D7 PC1D6 PC1D5 PC1D4 PC1D3 PC1D2 PC1D1 PC1D0

CW Port 1 WR CW1D7 0 0 CW1D4 CW1D3 CW1D2 CW1D1 CW1D0

Interrupt Port 1 RD/WR 0 0 0 0 0 IRQEN1 IRQC11 IRQC10

IntStat Port 1 - 2 RD 0 0 0 0 IRQST4 IRQST3 IRQST2 IRQST1

Port A2 RD/WR PA2D7 PA2D6 PA2D5 PA2D4 PA2D3 PA2D2 PA2D1 PA2D0
Port B2 RD/WR PB2D7 PB2D6 PB2D5 PB2D4 PB2D3 PB2D2 PB2D1 PB2D0
Port C2 RD/WR PC2D7 PC2D6 PC2D5 PC2D4 PC2D3 PC2D2 PC2D1 PC2D0

CW Port 2 WR CW2D7 0 0 CW2D4 CW2D3 CW2D2 CW2D1 CW2D0

Interrupt Port 2 RD/WR 0 0 0 0 0 IRQEN2 IRQC21 IRQC20

IntStat = Interrupt Status

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PIO-48 User Manual

I/O Control Word

Each port may be configured as either Input or Output. This is accomplished by
writing the correct Control Word (CW) to the proper register.

Control Word (X = 0) Hex Value Port Setup

7 6 5 4 3 2 1 0

1 X X 0 0 X 0 0 80 Out Out Out
1 X X 0 0 X 0 1 81 Out Out In
1 X X 0 0 X 1 0 82 Out In Out
1 X X 0 0 X 1 1 83 Out In In
1 X X 0 1 X 0 0 88 Out Out In
1 X X 0 1 X 0 1 89 Out Out In
1 X X 0 1 X 1 0 8A Out In In
1 X X 0 1 X 1 1 8B Out In In
1 X X 1 0 X 0 0 90 In Out Out
1 X X 1 0 X 0 1 91 In Out In
1 X X 1 0 X 1 0 92 In In Out
1 X X 1 0 X 1 1 93 In In In
1 X X 1 1 X 0 0 98 In Out In
1 X X 1 1 X 0 1 99 In Out In
1 X X 1 1 X 1 0 9A In In In
1 X X 1 1 X 1 1 9B In In In

A B C

Interrupt Control

When enabled, interrupts are generated on Port A bit D0.

IRQENn
IRQCn0
IRQCn1

n = port number

Interrupt enable 1 = enabled 0 = disabled ( 0 on power up )

Interrupt Mode Select Table

IRQCn1 IRQCn0 INT Type

0 0 Low level
0 1 High level
1 0 Falling edge
1 1 Rising edge

Interrupt Read

Reading the INTSTAT port (Base+5) clears any interrupt pending.

IRQST1 (D0) Interrupt status 1 = interrupt pending, 0 = none
IRQST2 (D1) Interrupt status 1 = interrupt pending, 0 = none

Interrupt mode select, see table below
Interrupt mode select, see table below

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PIO-48 User Manual

Electrical Characteristics

The PIO-48 uses 74LS245 octal bi-directional transceivers to provide TTL
input/output capabilities. Each bit is pulled to +5V through a 10K ohm pull-up
resistor to insure each bit is at a known state when not driven.

Specifications

Inputs

 Logic High: Min 2VDC
 Logic Low: Max 0.8VDC

Outputs

 Logic High: Min 2VDC @ 15 mA
 Logic Low: Max 0.5VDC @ 24 mA

Temperature Range

 Operating: 0°C – 70°C
 Storage: -50°C – 105°C

Power Requirements

 +5VDC @ 200mA
 +12VDC @ 25mA

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.

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PIO-48 User Manual

Example Circuits

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PIO-48 User Manual

Appendix A - Troubleshooting

Following these simple steps can eliminate most common problems.

1. Install software first. After installing the software then proceed to adding the
hardware. This places the required installation files in the correct locations.

2. Read this manual thoroughly before attempting to install the adapter in your
system.

3. Use Device Manager under Windows to verify proper installation.

4. Use the SeaIO Control Panel applet or the Device Manager’s property page for
card identification and configuration.

5. If these steps do not solve your problem, please call Sealevel Systems’
Technical Support, [phone]. Our technical support is free and available
from 8:00AM - 5:00PM Eastern Time Monday through Friday. For email
support contact mailto:[e-mail]

.

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PIO-48 User Manual

Appendix B - How To Get Assistance

Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance
is still needed please see below.

When calling for technical assistance, please have your user manual and current
adapter settings. If possible, please have the adapter installed in a computer ready to
run diagnostics.

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

Sealevel Systems maintains a Home page on the Internet. Our home page address is

http://www.sealevel.com

available via our FTP site that can be accessed from our home page.

Technical support is available Monday to Friday from 8:00 a.m. to 5:00 p.m. eastern
time. Technical support can be reached at [phone].

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.

. The latest software updates, and newest manuals are

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PIO-48 User Manual

Appendix C – Silk Screen – 4030 PCB

4.2"

6.1"

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PIO-48 User Manual

Appendix D - Compliance Notices

Federal Communications Commission Statement

FCC - This equipment has been tested and found to comply with the limits for Class
A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in such case the user will be required to correct the interference at the
users expense.

EMC Directive Statement

Products bearing the CE Label fulfill the requirements of the EMC directive
(89/336/EEC) and of the low-voltage directive (73/23/EEC) issued by the European
Commission.

To obey these directives, the following European standards must be met:

EN55022 Class A - “Limits and methods of measurement of radio interference
characteristics of information technology equipment”

EN55024 – “Information technology equipment Immunity characteristics Limits and
methods of measurement”.

EN60950 (IEC950) - “Safety of information technology equipment, including
electrical business equipment”

Warning

This is a Class A Product. In a domestic environment, this product may cause

radio interference in which case the user may be required to take adequate

measures to prevent or correct the interference.

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.

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PIO-48 User Manual

Warranty

Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime
Warranty that is standard on all Sealevel manufactured 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.

Sealevel Systems, Inc. (hereafter "Sealevel") warrants that the Product shall conform
to and perform in accordance with published technical specifications and shall be
free of defects in materials and workmanship for life. In the event of failure,
Sealevel will repair or replace the product at Sealevel's sole discretion. Failures
resulting from misapplication or misuse of the Product, failure to adhere to any
specifications or instructions, or failure resulting from neglect or abuse are not
covered under this warranty.

Warranty service is obtained by delivering the Product to Sealevel and providing
proof of purchase. Return authorization must be obtained from Sealevel Systems

before returned merchandise will be accepted. Authorization is obtained by
calling Sealevel Systems and requesting a Return Merchandise Authorization
(RMA) number. The Customer agrees to insure the Product or assume the risk of

loss or damage in transit, to prepay shipping charges to Sealevel, and to use the
original shipping container or equivalent. Warranty is valid only for original
purchaser and is not transferable.

Trademarks

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.

This warranty applies to Sealevel manufactured Product. Product purchased through
Sealevel but manufactured by a third party will retain the original manufacturer's
warranty.

Sealevel Systems, Incorporated
2779 Greenville Highway
P.O. Box 830
Liberty, SC 24857 USA
[phone] FAX: [phone]
www.sealevel.com
email: [e-mail]

Technical Support is available Monday - Friday from 8 a.m. to 5 p.m. Eastern time

Sealevel Systems, Incorporated acknowledges that all trademarks referenced in this
manual are the service mark, trademark, or registered trademark of the respective
company.

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PIO-48 User Manual