SeaLevel REL-32 User manual

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
REL-32
User Manual | 3098

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
CARD SETUP........................................................................................................................................................................................................................6
INSTALLATION.....................................................................................................................................................................................................................9
PROGRAMMING THE REL-32.........................................................................................................................................................................................12
ELECTRICAL CHARACTERISTICS...................................................................................................................................................................................19
SPECIFICATIONS...............................................................................................................................................................................................................20
EXAMPLE CIRCUITS .........................................................................................................................................................................................................21
APPENDIX A –TROUBLESHOOTING.............................................................................................................................................................................22
APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................23
APPENDIX C –SILK SCREEN –3098 PCB .................................................................................................................................................................24
APPENDIX D –COMPLIANCE NOTICES........................................................................................................................................................................25
WARRANTY ........................................................................................................................................................................................................................26

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Introduction
Overview
The REL-32 provides 32 reed relays that can switch power, data, or other electronic signals for control
applications. The outputs provide high quality, long life, low current (10 Watt maximum), dry contact switch
closures. Reed relays are well suited for low current applications. The relays are normally open and will
close when energized.
The REL-32 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 REL-32 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
Model No.
Part No.
Description
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
PIO-48
(P/N 4030)
- 48 TTL Inputs/Outputs

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Before You Get Started
What’s Included
The REL-32 is shipped with the following items. If any of these items is missing or damaged, please
contact Sealevel for replacement.
•REL-32 Adapter
•CA1752 6’ DB78M to dual DB37M Cable
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. 3098 Manual | SL9028 11/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the REL-32 to real-world signals. All items can be purchased from our website
(https://www.sealevel.com/) or by calling [phone].
DB-37 Male to DB-37 Female 6’Extension Cable (Item# CA112)
The CA112 is a cable that extends the DB-37 connector
on the CA172 cable an additional six feet and is pinned
one-to-one.
DB-37 Male/Female Terminal Block (Item# TB02-KT)
Break out serial and digital connectors to 37 screw
terminals for easy field connection. The TB02 terminal
block is designed with both DB-37 male and female
connectors, therefore; it can be used with any DB-37
board regardless of the board’s port gender.
Cable and Terminal Block Kit (Item# KT101)
For convenient and easier ordering, the KT101
includes the TB02-KT terminal block and CA112
cable in a single kit.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Card Setup
The REL-32 contains several jumper straps for each port that must be set for proper operation.
Address Selection
The REL-32 occupies 4 consecutive I/O locations. The DIP-switch (SW1) 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
Binary
Switch Settings
1
2
3
4
5
6
280-283
000010
Off
On
Off
On
On
On
288-28A
100010
Off
On
Off
On
Off
On
2A0-2A3
010100
Off
On
Off
Off
Off
On
328-32B
100101
Off
Off
On
On
On
On
330-333
100110
Off
Off
On
On
Off
On
Address Selection Table
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 XXX 100000 XXX where X = a non-selectable address bit and address bit A9 is always a 1.
DIP - Switch Illustration
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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Options Header
P1
Function
P2
Function
P3
Function
1
Switch 1B
1
Common 1
1
Switch 1A
2
Switch 2B
2
Common 1
2
Switch 2A
3
Switch 3B
3
Common 1
3
Switch 3A
4
Switch 4B
4
Common 1
4
Switch 4A
5
Switch 5B
5
Common 1
5
Switch 5A
6
Switch 6B
6
Common 1
6
Switch 6A
7
Switch 7B
7
Common 1
7
Switch 7A
8
Switch 8B
8
Common 1
8
Switch 8A
9
Switch 9B
9
Common 2
9
Switch 9A
10
Switch 10B
10
Common 2
10
Switch 10A
11
Switch 11B
11
Common 2
11
Switch 11A
12
Switch 12B
12
Common 2
12
Switch 12A
13
Switch 13B
13
Common 2
13
Switch 13A
14
Switch 14B
14
Common 2
14
Switch 14A
15
Switch 15B
15
Common 2
15
Switch 15A
16
Switch 16B
16
Common 2
16
Switch 16A
17
Switch 17B
17
Common 3
17
Switch 17A
18
Switch 18B
18
Common 3
18
Switch 18A
19
Switch 19B
19
Common 3
19
Switch 19A
20
Switch 20B
20
Common 3
20
Switch 20A
21
Switch 21B
21
Common 3
21
Switch 21A
22
Switch 22B
22
Common 3
22
Switch 22A
23
Switch 23B
23
Common 3
23
Switch 23A
24
Switch 24B
24
Common 3
24
Switch 24A
25
Switch 25B
25
Common 4
25
Switch 25A
26
Switch 26B
26
Common 4
26
Switch 26A
27
Switch 27B
27
Common 4
27
Switch 27A
28
Switch 28B
28
Common 4
28
Switch 28A
29
Switch 29B
29
Common 4
29
Switch 29A
30
Switch 30B
30
Common 4
30
Switch 30A
31
Switch 31B
31
Common 4
31
Switch 31A
32
Switch 32B
32
Common 4
32
Switch 32A
33
GND
33
Common 1
33
5V/12V
34
GND
34
Common 2
34
5V/12V
35
GND
35
Common 3
35
5V/12V
36
GND
36
Common 4
36
5V/12V
Header JP1

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Optional Header, Continued
IRQ Header E2
Header JP1 provides a means of connecting +5 VDC and +12 VDC from the PC bus to the Options
Header. The center pin of this header is connected to P3 pins 3336.
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.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Installation
Software Installation
Windows 98/ME/NT/2000/XP Installation
Do not install the Adapter in the machine until the software had been fully installed.
For Windows Users
1. Begin by locating, selecting, and installing the correct software from the Sealevel software driver
database.
2. Select the Part Number (3098) for your device from the listing.
3. Click the ‘Download Now’ button. The SeaIO software is available for Windows and Linux.
4. The setup file will automatically detect the operating environment and install the proper
components.
5. 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.
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.
To confirm that the SeaIO driver has been successfully installed, click on the ‘Start’ button, and then
select ‘All Programs’. You should see the ‘SeaIO’ program folder listed.
You are now ready to proceed with connecting the 3098 to your system. Refer to the Hardware
Installation section for details.
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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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Installation, Continued
Other Operating Systems
Refer to the appropriate section of the Serial Utilities Software.
You MUST have “root”privileges to install the software and drivers.
LINUX INSTALLATION
Refer to Linux Archives - Sealevel. This link contains valuable information on installing your serial
adapter in the various Linux releases. Also included is a series of files explaining proper Linux syntax and
typical Linux serial implementations.
For additional software support, please call Sealevel Systems’ Technical Support, [phone]. Our
technical support is free and available from 8:00AM-5PM Eastern Time, Monday through Friday. For
email support contact: mailto:sup[email protected]om.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Installation, Continued
Hardware Installation
The adapter can be installed in any PC 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 PC slot and remove the blank metal slot cover.
4. Gently insert the REL-32 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 REL-32 is now ready for use.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32
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. The software also includes 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 DIO-32.PCI. 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/SeaI/O/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.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
Digital I/O Interface
The REL-32 provides four parallel input/output (I/O) ports. The ports are organized as ports 1, 2, 3, and 4.
Output Ports (Reed Relay)
Reed relays provide very high quality, long life, low current, dry contact switch closures. Reed relays are not
suited for high current applications and can be destroyed by inductive load switching. The relays are
normally open, and close when energized.
Connector and Jumper Pin Out
Each relay has two sides, an A-side and B-side. Each side is connected to two places: the cable, and the
jumpers on the top of the board. The tables on the following pages provide the pin outs for the two DB-37
cable ends and the onboard jumpers.

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
Jumper Setup Options
The common on each port may be tied to ground, 5, or 12 volts. Either side of each relay may then be tied
to the common. The 3098 is shipped with all of the jumpers necessary for all possible configurations. The
jumpers are parked on the B-side and are inactive until configured by the user. An example configuration is
shown below:
Port 4: The common is tied to ground (GND).
The A-side of port-4 relay 3 (K27) is tied to the common.
The B-side of port-4 relay 6 (K30) is tied to the common.
Port 3: The common is tied to ground (GND).
The A-side of port-3 relay 2 (K18) is tied to the common.
The A-side of port-3 relay 5 (K21) is tied to the common.
Port 2: The common is tied to 5 volts.
The B-side of port-2 relay 4 (K12) is tied to the common.
Port 1: The common is tied to 12 volts.
The A-side of port-1 relay 1 (K1) is tied to the common.
The A-side of port-1 relay 8 (K8) is tied to the common.
Port 4
GND A
com5V B12V
1 2 3 4 5 6 7 8
Port 3
GND A
COM5V B12V
1 2 3 4 5 6 7 8
Port 2
GND A
com5V B12V
1 2 3 4 5 6 7 8
Port 1
GND A
com5V B12V
1 2 3 4 5 6 7 8

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
Output Ports (Reed Relay) Pin Assignments
Via standard 6’ cable, DB-78 Male to dual DB-37 Male connectors, Part Number CA172. The DB-37
connectors are labeled “Ports 1,2” and “Port 3,4”.
Port 1
Port 2
Relay A Side
Relay B Side
Relay A Side
Relay B Side
Relay
Port 1 - A
Pin
Port 1 - B
Pin
Relay
Port 2 -
A
Pin
Port 2 - B
Pin
K1
1
2
1
20
K9
1
10
1
28
K2
2
3
2
21
K10
2
11
2
29
K3
3
4
3
22
K11
3
12
3
30
K4
4
5
4
23
K12
4
13
4
31
K5
5
6
5
24
K13
5
14
5
32
K6
6
7
6
25
K14
6
15
6
33
K7
7
8
7
26
K15
7
16
7
34
K8
8
9
8
27
K16
8
17
8
35
Port 3
Port 4
Relay A Side
Relay B Side
Relay A Side
Relay B Side
Relay
Port 3 - A
Pin
Port 3 - B
Pin
Relay
Port 4 - A
Pin
Port 4 - B
Pin
K17
1
2
1
20
K25
1
10
1
28
K18
2
3
2
21
K26
2
11
2
29
K19
3
4
3
22
K27
3
12
3
30
K20
4
5
4
23
K28
4
13
4
31
K21
5
6
5
24
K29
5
14
5
32
K22
6
7
6
25
K30
6
15
6
33
K23
7
8
7
26
K31
7
16
7
34
K24
8
9
8
27
K32
8
17
8
35
Power and Ground Pin Assignments
Via standard 6’ cable, DB-78 Male to dual DB-37 Male connectors, Part Number CA172.
Ground
18, 36, 37
+ 5 Volts
19
+ 12 Volts
1

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
Optional DB-37 Female Pin Assignment
In order to maintain compatibility with the existing ISA interface adapter (Sealevel Item# 3098), an optional
6’ cable is offered with DB-78 Male to dual DB-37 Female connectors, Part Number CA173. The DB-37
connectors are labeled “Side A” and “Side B”.
Side A
Side B
Pin
Function
Jumper
Pin
Function
Jumper
1
Ground
N/A
1
Ground
N/A
2
Relay 2A
PORT 1-A2
2
Relay 2B
PORT 1-B2
3
Relay 4A
PORT 1-A4
3
Relay 4B
PORT 1-B4
4
Relay 6A
PORT 1-A6
4
Relay 6B
PORT 1-B6
5
Relay 8A
PORT 1-A8
5
Relay 8B
PORT 1-B8
6
Relay 10A
PORT 2-A2
6
Relay 10B
PORT 2-B2
7
Relay 12A
PORT 2-A4
7
Relay 12B
PORT 2-B4
8
Relay 14A
PORT 2-A6
8
Relay 14B
PORT 2-B6
9
Relay 16A
PORT 2-A8
9
Relay 16B
PORT 2-B8
10
Relay 18A
PORT 3-A2
10
Relay 18B
PORT 3-B2
11
Relay 20A
PORT 3-A4
11
Relay 20B
PORT 3-B4
12
Relay 22A
PORT 3-A6
12
Relay 22B
PORT 3-B6
13
Relay 24A
PORT 3-A8
13
Relay 24B
PORT 3-B8
14
Relay 26A
PORT 4-A2
14
Relay 26B
PORT 4-B2
15
Relay 28A
PORT 4-A4
15
Relay 28B
PORT 4-B4
16
Relay 30A
PORT 4-A6
16
Relay 30B
PORT 4-B6
17
Relay 32A
PORT 4-A8
17
Relay 32B
PORT 4-B8
18
12 V
N/A
18
12 V
N/A
19
5 V
N/A
19
5 V
N/A
20
Relay 1A
PORT 1-A1
20
Relay 1B
PORT 1-B1
21
Relay 3A
PORT 1-A3
21
Relay 3B
PORT 1-B3
22
Relay 5A
PORT 1-A5
22
Relay 5B
PORT 1-B5
23
Relay 7A
PORT 1-A7
23
Relay 7B
PORT 1-B7
24
Relay 9A
PORT 2-A1
24
Relay 9B
PORT 2-B1
25
Relay 11A
PORT 2-A3
25
Relay 11B
PORT 2-B3
26
Relay 13A
PORT 2-A5
26
Relay 13B
PORT 2-B5
27
Relay 15A
PORT 2-A7
27
Relay 15B
PORT 2-B7
28
Relay 17A
PORT 3-A1
28
Relay 17B
PORT 3-B1
29
Relay 19A
PORT 3-A3
29
Relay 19B
PORT 3-B3

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
30
Relay 21A
PORT 3-A5
30
Relay 21B
PORT 3-B5
31
Relay 23A
PORT 3-A7
31
Relay 23B
PORT 3-B7
32
Relay 25A
PORT 4-A1
32
Relay 25B
PORT 4-B1
33
Relay 27A
PORT 4-A3
33
Relay 27B
PORT 4-B3
34
Relay 29A
PORT 4-A5
34
Relay 29B
PORT 4-B5
35
Relay 31A
PORT 4-A7
35
Relay 31B
PORT 4-B7
36
Ground
N/A
36
Ground
N/A
37
Ground
N/A
37
Ground
N/A
DB-78 Female Pin Assignment
This table shows the pin assignments via the card edge connector.
Port 1
Port 2
Relay A Side
Relay B Side
Relay A Side
Relay B Side
Relay
Port 1 - A
Pin
Port 1 - B
Pin
Relay
Port 2 - A
Pin
Port 2 - B
Pin
K1
1
2
1
20
K9
1
10
1
28
K2
2
3
2
21
K10
2
11
2
29
K3
3
4
3
22
K11
3
12
3
30
K4
4
5
4
23
K12
4
13
4
31
K5
5
6
5
24
K13
5
14
5
32
K6
6
7
6
25
K14
6
15
6
33
K7
7
8
7
26
K15
7
16
7
34
K8
8
9
8
27
K16
8
17
8
35
Port 3
Port 4
Relay A Side
Relay B Side
Relay A Side
Relay B Side
Relay
Port 3 - A
Pin
Port 3 - B
Pin
Relay
Port 4 - A
Pin
Port 4 - B
Pin
K17
1
39
1
57
K25
1
47
1
65
K18
2
40
2
58
K26
2
48
2
66
K19
3
41
3
59
K27
3
49
3
67
K20
4
42
4
60
K28
4
50
4
68
K21
5
43
5
61
K29
5
51
5
69
K22
6
44
6
62
K30
6
52
6
70
K23
7
45
7
63
K31
7
53
7
71
K24
8
46
8
64
K32
8
54
8
72

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Programming the REL-32, Continued
Power and Ground Pin Assignments
Via DB-78 Female card edge connector.
Ground
18, 36, 37, 55, 73, 74
+ 5 Volts
19, 56
+ 12 Volts
1, 38
Direct Hardware Control
In systems where the user’s program has direct access to the hardware (DOS) the table below gives the
mapping and functions that the REL-32 provides.
Function
Available
Port
Address Hex
Port Type
R/W
1
Base + 0
Relay 1- Relay 8
R/W
2
Base + 1
Relay 9 - Relay 16
R/W
3
Base + 2
Relay 17 - Relay 24
R/W
4
Base + 3
Relay 25 - Relay 32
R/W = Read or Write
Reading the Outputs
The relay ports return the ones complement of the value that is currently being used to drive the relays.
When using the API the value is returned not the complement of the value.
Writing the Outputs
The relays on a standard 3098 are normally open. To close a relay a one must be written to the
appropriate bit.
Register Description
Address
Mode
D7
D6
D5
D4
D3
D2
D1
D0
Base+0
R/W
P1D7
P1D6
P1D5
P1D4
P1D3
P1D2
P1D1
P1D0
Base+1
R/W
P2D7
P2D6
P2D5
P2D4
P2D3
P2D2
P2D1
P2D0
Base+2
R/W
P3D7
P3D6
P3D5
P3D4
P3D3
P3D2
P3D1
P3D0
Base+3
R/W
P4D7
P4D6
P4D5
P4D4
P4D3
P4D2
P4D1
P4D0

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Electrical Characteristics
Features
•Selectable I/O port addressing from 200H –3F8H
•4 sets of SPST Reed relays with each set having 8 relays
•Highly reliable 10 VA DIP reed relays utilized
•Multiple adapters can reside in same computer
•All address, data and control signals are TTL compatible

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© Sealevel Systems, Inc. 3098 Manual | SL9028 11/2021
Specifications
Output Relays
Contact Max Power Rating
10W
Contact Voltage Maximum
100 VDC/VAC
Contact Current Maximum
.5A AC/DC RMS
Contact Resistance, Initial
.15 
Rated Life
200 Million Closures
(Low Load)
100 Million Closures
(Maximum Load)
Speed
Operate - .5mS
Release - .5mS
Bounce - .5 mS
Maximum Operating Speed
600 Hz
Environmental Specifications
Specification
Operating
Storage
Temperature Range
0º to 70º C
-50º to 105º C
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 Requirements
Supply Line
+5 VDC
+12VDC
Rating
800 mA
50 mA
Physical Dimensions
Board length
13.3 inches (33.9 cm)
Board Height including Goldfingers
4.2 inches (10.7 cm)