SeaLevel DIO-32B User manual

DIO-32B™
USER’S MANUAL
Part Number 3093
Sealevel Systems, Inc Phone: [phone]
155 Technology Place Fax: [phone]
P.O. Box 830 www.sealevel.com
Liberty, SC 29657

Contents
INTRODUCTION............................................................................................................1
OVERVIEW ....................................................................................................1
WHAT’S INCLUDED ......................................................................................1
FACTORY DEFAULT SETTINGS ......................................................................1
CARD SETUP ................................................................................................................2
ADDRESS SELECTION ....................................................................................2
IRQ HEADER E2..........................................................................................3
INSTALLATION.............................................................................................................4
SOFTWARE INSTALLATION...........................................................................4
For Windows Users................................................................................4
TECHNICAL DESCRIPTION ...........................................................................................5
FEATURES ....................................................................................................5
INPUT PORTS................................................................................................5
Sensor Input Ports Pin Assignments (P1)............................................7
OUTPUT PORTS (REED RELAY)....................................................................7
RELAY SPECIFICATIONS................................................................................7
Output Ports (Reed Relay) Pin Assignments (P2)..............................8
PROGRAMMING............................................................................................................9
APPLICATION PROGRAMMERS INTERFACE (API)..........................................9
Interrupts.................................................................................................9
Relative Addressing Vs. Absolute Addressing.....................................9
DIRECT HARDWARE CONTROL...................................................................11
Reading the Inputs (direct) :................................................................11
Reading the Outputs (relays) (direct) :...............................................11
Writing the Outputs (relays) (direct) : ...............................................11
SPECIFICATIONS ........................................................................................................12
ENVIRONMENTAL SPECIFICATIONS.............................................................12
POWER CONSUMPTION...............................................................................12
MEAN TIME BETWEEN FAILURES (MTBF).................................................12
PHYSICAL DIMENSIONS..............................................................................12
APPENDIX A -TROUBLESHOOTING............................................................................13
APPENDIX B -HOW TO GET ASSISTANCE.................................................................14
APPENDIX C -SILK-SCREEN ......................................................................................15
APPENDIX D -SCHEMATIC.........................................................................................16
APPENDIX E -COMPLIANCE NOTICES .......................................................................18
FEDERAL COMMUNICATIONS COMMISSION STATEMENT ...........................18
EMC DIRECTIVE STATEMENT....................................................................18

WARRANTY................................................................................................................19
Figures
Figure 1 -Address Selection Table...........................................................................2
Figure 2 -DIP-Switch Illustration..............................................................................2
Figure 3 -IRQ HeaderE2.........................................................................................3
©2002aSealevel Systems, Incorporated. All rights reserved.

Introduction
Sealevel Systems DIO-32B Page 1
Introduction
Overview
The DIO-32B provides 16 reed relays that can latch power, data or other
electronic signals for control applications and 16 optically isolated inputs to
allow monitoring of off board switch closures, relays or for any other general
purpose monitoring needs. The DIO-32B is PC compatible and fits any full
length ISA or EISA slot. Addressing, data and control signals are TTL
compatible.
The DIO-32B is simple to operate. By writing instruction bytes to the I/O port
addresses, the reed relays are energized or de-energized. Inputs are just as
simply read from their data ports.
What’s Included
The DIO-32B is shipped with the following items. If any of these items are
missing or damaged, contact the supplier.
•DIO-32B Interface Adapter
•37 Pin Ribbon Cable
•Sealevel Software CD
Factory Default Settings
The DIO-32B factory default settings are as follows:
Base Address IRQ
300 5
To install the DIO-32B using factory default settings, refer to Installation on
page 4.
For your reference, record installed DIO-32B settings below:
Base Address IRQ

Card Setup
Sealevel Systems DIO-32B Page 2
Card Setup
The DIO-32B contains several jumper straps for each port which must be set
for proper operation.
Address Selection
The DIO-32B 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
12345678
100-104 01 0000 00xx Off On On On On On On On
104-108 01 0000 01xx Off On On On On On On Off
200-204 10 0000 00xx On Off On On On On On On
280-283 10 1000 00xx Off On Off On On On On On
284-287 10 1000 01xx Off On Off On Off On On Off
2EC-2EF 10 1110 11xx Off On Off Off Off On Off Off
300-303 11 0000 00xx Off Off On On On On On On
320-323 11 0010 00xx Off Off On On Off On On On
388-38B 11 1000 10xx Off Off Off On On On Off On
3A0-3A3 11 1010 00xx Off Off Off On Off On On On
3A4-3A7 11 1010 01xx Off Off Off On Off On On Off
Figure 1-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
XX 11 0000 00XX where X = a non-selectable address bit and address bit A9
is always a 1.
1 2 3 4 5 6 7
ON
OFF
A9 A2
8
Figure 2-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’.

Card Setup
Sealevel Systems DIO-32B Page 3
IRQ Header E2
Interrupts can be generated by Port A, bit 0 going low if enabled at jumper
location E2. Interrupt request signals 2/9 through 7 (IRQ 2/9 -7) can be
selected by placing the jumper in the appropriate position. Other inputs can be
‘wire OR ed.’ to also generate interrupts if desired. Please consult the factory
for more information.
2/9 3 4 5 6 7
E2
Figure 3-IRQ Header E2

Installation
Sealevel Systems DIO-32B Page 4
Installation
TheDIO-32B can be installed in any ISA PC expansion slot. The DIO-32B
contains a DIP-switch (SW1) and IRQ selection which must be set prior to
installation.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an two available slots and remove the blank metal slot covers.
4. Gently insert the DIO-32B into the slot. Make sure the adapter is seated
properly. Insert the cable bracket into the adjacent slot and screw in place.
5. Replace the cover.
6. Connect the power cord.
Installation is complete.
Software Installation
For Windows Users
Choose Install Software at the beginning of the CD and select the Digital I/O
software drivers and install SeaIO.

Technical Description
Sealevel Systems DIO-32B Page 5
Technical Description
The DIO-32B provides four parallel input/output (I/O) ports. The ports are
organized as ports A, B, C, and D. Port A and B are input ports interfaced to
optically-isolated inputs, while ports C and D are reed relay output ports.
Assuming an I/O address of 300 Hex the following table shows the Port
Addresses.
Base Address Hex Decimal Mode
Port A Address 300 768 Input Port (Opto Input)
Port B Address 301 769 Input Port
Port C Address 302 770 Output Port (Reed Relays)
Port D Address 303 771 Output Port
Features
•Selectable I/O port addressing from 100H -3FFH
•2 sets SPST relays with each set having 8 relays
•2 eight bit input ports
•DB-37 male connector for relay outputs
•DB-37 female connector for optically isolated inputs
•Highly reliable 10 VA DIP reed relays utilized
•8 bit slot connector
•Multiple adapters can reside in same computer
•All address, data and control signals are TTL compatible
Input Ports
Ports A and B are 8 bit input ports connected to optically isolated input
sensors. Each sensor can be used to interface a voltage input and then sense
whether the voltage is on or off. Each sensor is isolated (with respect to a
common ground) from every other sensor, and also isolated with respect to the
host PC ground. This means that signals such as low-level AC line voltage,
motor servo voltage, and control relay signals can be ‘sensed’, or read by the
PC, without the risk of damage due to ground loops or ground faults.
Each sensor input pair has a current limiting resistor which is used to limit the
input current to the opto-isolator. The opto-isolator has two ‘back-to-back’
diodes internally. This allows AC or DC signals to be sensed, regardless of
polarity. When the applied voltage is high enough to cause the led in the
opto-isolator to turn-on, the output of the opto-isolator goes low (0 volts) and
the signal is read as a low logic level (binary 0) by the PC. When the input
signal is too low to turn on the opto-isolator, the output goes high and the port
bit is read by the PC as a high logic level (binary 1).

Technical Description
Sealevel Systems DIO-32B Page 6
The input impedance of each isolated input is approximately 560 ohms
(factorydefault). The opto-isolator requires approximately 3 mA to turn on.
The maximum input current is 60 mA. Two things to consider when selecting
the input resistor. The first is turn on voltage for the circuit to sense, and
second is the maximum input voltage. Maximum input voltage must not provide
too much power to the input resistor, and must also not overdrive the opto-
isolator input current specification. The following formulas apply:
Turn on current: 3 mA
Isolator diode drop: 1.1 V
Resistor power Max: .25 W
Turn on Voltage = diode drop + (turn on current) x ( resistance)
Or : 1.1 + (.003) x R
Maximum voltage = square root of (.25 (resistor value))
The following table shows four common input resistors and the ranges
associated witheach .
Input Resistor
(Ohms) Min Turn-On (Volts) Max Input (Volts) Max Current (mA)
220 1.76 7 32
560 2.8 12 22
1K 4.1 16 16
2.2K 7.7 24 11
The maximum input voltage can be increased by increasing the input resistor
accordingly. Because socketed DIP resistor networks are utilized, they can
easily be replaced with a different value. This can be done at the factory, if
necessary. The input circuits are not intended for monitoring 120 volt AC
circuits. In addition to being too high a voltage for the circuits, it is dangerous
to have that high a voltage on the card.

Technical Description
Sealevel Systems DIO-32B Page 7
Sensor Input Ports Pin Assignments (P1)
Port A Bit P1 Port B Bit P1
018,37 010,29
117,36 19, 28
216,35 28,27
315,34 37,26
414,33 46,25
513,32 55,24
612,31 64,23
711,30 73,22
Ground 2,20,21
+ 12 Volts 19
+ 5 Volts 1
Output Ports (Reed Relay)
Reed relays provide very high quality, long life, low current (10 Watt
maximum), dry contact switch closures. Reed relays are not suited for high
current applications, and can be destroyed by inductive load switching, where a
spark occurs across the contacts internally. The relays are normally open, and
close when energized. Each relay can be individually energized by writing a ‘1’
to the proper port bit.
Relay Specifications
•Contact Power Ratings: 10 Watts Maximum
•Contact Voltage Maximum: 100 Volts DC or AC Maximum
•Contact Current Maximum: .5 Amps DC or AC RMS
•Contact Resistance, Initial: .15 Ohms
•Rated Life:
Low Load: 200 Million Closures
Maximum Load: 100 Million Closures
•Contact Speed:
Operate: .5 m Sec
Release: .5 m Sec
Bounce: .5 m Sec
•Maximum Operating Speed: 600 Hertz

Technical Description
Sealevel Systems DIO-32B Page 8
Output Ports (Reed Relay) Pin Assignments (P2)
Port C Bit Relay P2 Pin Port D Bit Relay P2 Pin
0 K16 2,20 0K8 10,28
1K15 3,21 1K7 11,29
2K14 4,22 2K6 12,30
3 K13 5,23 3K5 13,31
4 K12 6,24 4K4 14,32
5K11 7,25 5K3 15,33
6 K10 8,26 6K2 16,34
7K9 9,27 7K1 17,35
Ground 18,36,37
+ 5 Volts 19
+ 12 Volts 1

Technical Description
Sealevel Systems DIO-32B Page 9
Programming
Application Programmers Interface (API)
Most modern operating systems do not allow direct hardware access. The
SeaIO driver and API have been included to provide control over the hardware
in Windows and Linux environments.
The purpose of this section of the manual is to help the customer with the
mapping of the API to the actual inputs and relays for the 3093 specifically.
Complete documentation of the API can be found in its accompanying help file.
Interrupts
Interrupt sampling can be set up in the API. Port A bit zero is the interrupt
source. Refer to the API help file for more detailed information.
Relative Addressing Vs. Absolute Addressing
The SeaIO API makes a distinction between “absolute” and “relative”
addressing modes. In absolute addressing mode, the Port argument to the API
function acts as a simple byte offset from the base I/O address of the device.
For instance, Port #0 refers to the I/O address base + 0; Port #1 refers to the
I/O address base + 1.
Relative addressing mode, on the other hand, refers to input and output ports in
a logical fashion. With a Port argument of 0 and an API function meant to
output data, the first (0th) output port on the device will be utilized. Likewise,
with a Port argument of 0 and an API function designed to input data, the first
(0th) input port of the device will be utilized.
In all addressing modes, port numbers are zero-indexed; that is, the first port is
port #0, the second port is #1, the third #2, and so on.

Technical Description
Sealevel Systems DIO-32B Page 10
Tables : API Port/bit reference numbers for Absolute and Relative Addressing
R = Read
W = Write
R/W = Read or Write
Port API Port # Absolute
Address (function) API Port # Relative Address (function) Port Type
A0 ( R ) 0 ( R ) Input Port (Opto Input)
B1 ( R ) 1 ( R ) Input Port
C2 ( R/W ) 0 ( W ) Output Port (Reed Relays)
D3 ( R/W ) 1 ( W ) Output Port
API Bit # Absolute
Address (function) API Bit # Relative Address (function) Port Bit
0 ( R ) 0 ( R ) A0 -Input
1 ( R ) 1 ( R ) A1 -Input
2 ( R ) 2 ( R ) A2 -Input
3 ( R ) 3 ( R ) A3 -Input
4 ( R ) 4 ( R ) A4 -Input
5 ( R ) 5 ( R ) A5 -Input
6 ( R ) 6 ( R ) A6 -Input
7 ( R ) 7 ( R ) A7 -Input
8 ( R ) 8 ( R ) B0 -Input
9 ( R ) 9 ( R ) B1 -Input
10 ( R ) 10 ( R ) B2 -Input
11 ( R ) 11 ( R ) B3 -Input
12 ( R ) 12 ( R ) B4 -Input
13 ( R ) 13 ( R ) B5 -Input
14 ( R ) 14 ( R ) B6 -Input
15 ( R ) 15 ( R ) B7 -Input
16 ( R/W ) 0 ( W ) C0 -Output
17 ( R/W ) 1 ( W ) C1 -Output
18 ( R/W ) 2 ( W ) C2 -Output
19 ( R/W ) 3 ( W ) C3 -Output
20 ( R/W ) 4 ( W ) C4 -Output
21 ( R/W ) 5 ( W ) C5 -Output
22 ( R/W ) 6 ( W ) C6 -Output
23 ( R/W ) 7 ( W ) C7 -Output
24 ( R/W ) 8 ( W ) D0 -Output
25 ( R/W ) 9 ( W ) D1 -Output
26 ( R/W ) 10 ( W ) D2 -Output
27 ( R/W ) 11 ( W ) D3 -Output
28 ( R/W ) 12 ( W ) D4 -Output
29 ( R/W ) 13 ( W ) D5 -Output
30 ( R/W ) 14 ( W ) D6 -Output
31 ( R/W ) 15 ( W ) D7 -Output

Technical Description
Sealevel Systems DIO-32B Page 11
Direct Hardware Control
In systems where the users program has direct access to the hardware (DOS)
the table below gives the mapping and functions that the 3093 provide, a base
address of 300 was used. If a different base address is used then the port
addresses are calculated as shown in the table.
Reading the Inputs (direct) :
The inputs are active Low. If no voltage is applied across one of the
differential inputs it returns a one on that bit. If an AC or DC voltage (of
sufficient magnitude, covered above) is applied it returns a zero on that bit.
Reading the Outputs (relays) (direct) :
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 (relays) (direct) :
The output ports are the only ports that can be written. The relays on a standard
3093 are normally open. To close a relay a one must be written to the
appropriate bit.
R = Read
W = Write
R/W = Read or Write
Function
Available Port Address Hex Address Decimal Port Type
RA300 (Base + 0) 768 Input Port (Opto Input)
RB301(Base + 1) 769 Input Port
R/W C302 (Base + 2) 770 Output Port (Reed Relays)
R/W D303 (Base + 3) 771 Output Port

Specifications
Sealevel Systems DIO-32B Page 12
Specifications
Environmental Specifications
Specification Operating Storage
Temperature Range 0º to 50º C
(32º to 122º F ) -20º to 70º C (-4º to 158º F)
Humidity Range 10 to 90% R.H.
Non-Condensing 10 to 90% R.H. Non-Condensing
Power Consumption
Supply line +12 VDC +5 VDC
Rating 50 mA 800 mA
Mean Time Between Failures (MTBF)
Greater than 150,000 hours. (Calculated)
Physical Dimensions
Board length 9.75 inches (24.77 cm)
Board Height including Goldfingers 4.2 inches (10.66 cm)
Board Height excluding Goldfingers 3.9 inches (9.906 cm)
Note:Please see Appendix D for board layout and dimensions.

Appendix A -Troubleshooting
Sealevel Systems DIO-32B Page 13
Appendix A -Troubleshooting
1. Identify all I/O adapters currently installed in your system. This includes
your on-board serial ports, controller cards, sound cards etc.
2. Configure your Sealevel Systems adapter so that there is no conflict with
currently installed adapters. No two adapters can occupy the same I/O
address.
3. Make sure the Sealevel Systems adapter is securely installed in a
motherboard slot.
4. The following are known I/O conflicts:
•The 278 and 378 settings may conflict with your printer I/O
adapter.
•3B0 cannot be used if a Monochrome adapter is installed.
•3F8-3FF is typically reserved for COM1:
•2F8-2FF is typically reserved for COM2:
•3E8-3EF is typically reserved for COM3:
•2E8-2EF is typically reserved for COM4:

Appendix B -How To Get Assistance
Sealevel Systems DIO-32B Page 14
Appendix B -How To Get Assistance
Please refer to Appendix A -Troubleshooting prior to calling Technical
Support.
1. Read this manual thoroughly before attempting to install the
adapter in your system.
2. 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.
3. Sealevel Systems maintains a forum on CompuServe which is
accessed by typing ‘GO Sealevel’ at the command prompt.
4. 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 (864)
843-4343.
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.

Appendix C -Silk-Screen
Sealevel Systems DIO-32B Page 15
Appendix C -Silk-Screen
9.75"
4.2"
3.9"

Appendix D -Schematic
Sealevel Systems DIO-32B Page 16
Appendix D -Schematic

Appendix D -Schematic
Sealevel Systems DIO-32B Page 17