SeaLevel DIO-16.PCI User manual

Part # 8002
Sealevel Systems, Inc
155 Technology Place
P.O. Box 830
Liberty, SC 29657 USA
Phone: [phone]
FAX: [phone]
www.sealevel.com
DIO-16.PCI
USER MANUAL
TM

Contents
INTRODUCTION..................................................................................................1
OVERVIEW .................................................................................................................1
WHAT’S INCLUDED....................................................................................................1
INSTALLATION....................................................................................................1
CARD SETUP..............................................................................................................1
SOFTWARE INSTALLATION ........................................................................................1
FOR WINDOWS USERS...............................................................................................1
SYSTEM INSTALLATION .............................................................................................1
TECHNICAL DESCRIPTION............................................................................2
FEATURES..................................................................................................................2
INPUT PORT ...............................................................................................................2
Sensor Input Port Pin Assignments (P3 DB-37 Male)...............................4
OUTPUT PORT (REED RELAY)....................................................................................4
RELAY SPECIFICATIONS .............................................................................................4
Output Port (Reed Relay) Pin Assignments (P3 DB-37 Male)..................5
SOFTWARE ................................................................................................................5
PROGRAMMING................................................................................................6
APPLICATION PROGRAMMERS INTERFACE (API) .......................................................6
Interrupts.........................................................................................................6
Relative Addressing Vs. Absolute Addressing.............................................6
DIRECT HARDWARE CONTROL..................................................................................8
Reading the Inputs (direct) : ..........................................................................8
Reading the Outputs (relays) (direct) :.........................................................8
Writing the Outputs (relays) (direct) :..........................................................8
Interrupts.........................................................................................................8
Register Description......................................................................................9
SPECIFICATIONS............................................................................................10
ENVIRONMENTAL SPECIFICATIONS..........................................................................10
POWER CONSUMPTION...........................................................................................10
MEAN TIME BETWEEN FAILURES (MTBF).............................................................10
PHYSICAL DIMENSIONS...........................................................................................10
APPENDIX A -TROUBLESHOOTING........................................................11
APPENDIX B -HOW TO GET ASSISTANCE.............................................12
APPENDIX C -SILK-SCREEN......................................................................13

APPENDIX D -COMPLIANCE NOTICES..................................................14
FEDERAL COMMUNICATIONS COMMISSION STATEMENT........................................14
EMC DIRECTIVE STATEMENT ................................................................................14
WARRANTY.......................................................................................................15
© 2002a Sealevel Systems, Incorporated. All rights reserved.

Introduction and Installation
Sealevel Systems DIO-16.PCI Page 1
Introduction
Overview
The DIO-16.PCI provides 8 reed relays that can latch power, data or other
electronic signals for control applications and 8 optically isolated inputs to
allow monitoring of off board switch closures, relays or for any other general
purpose monitoring needs. The DIO-16 is PC compatible and PCI slot.
What’s Included
The DIO-16.PCI is shipped with the following items. If any of these items is
missing or damaged, contact the supplier.
•DIO-16.PCI Adapter
•DIO Software
•User Manual
Installation
Card Setup
The DIO-16.PCI is a fully compliant PCI ‘Plug and Play’ adapter. All card
resources (i.e. I/O address, IRQ selection) are auto-assigned by either your
system BIOS or your ‘Plug and Play’ operating system.
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.
System Installation
The DIO-16.PCI can be installed in any of the PCI expansion slots.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available PCI slot and remove the blank metal slot cover.
4. Gently insert the DIO-16.PCI into the slot. Make sure that the adapter
is seated properly.
5. Replace the screw.
6. Replace the cover.
7. Connect the power cord. Installation is complete.

Technical Description
Sealevel Systems DIO-16.PCI Page 2
Technical Description
The DIO-16.PCIprovides two parallel input/output (I/O) ports. The ports are
organized as ports A, B, C, and D. Port A is an input port interfaced to
optically-isolated inputs, while port C is the reed relay output port.
Features
•8 SPST relays
•1 eight bit optically isolated input port
•DB-37 Male connector
•Highly reliable 10 VA DIP reed relays utilized
•Multiple adapters can reside in same computer
•PCI 2.1 Bus compatible
Input Port
Port A is 8 bit input port 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 that 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-16.PCI Page 3
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:
1. The first is turn on voltage for the circuit to sense.
2. 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 with each.
Input Resistor
(Ohms) Min Turn-On (Volts) Max Input (Volts) Max Current (mA)
220 1.76 7 27
560* 2.8 12 20
1K 4.1 16 15
2.2K 7.7 24 10
*Factory default
Increasing the input resistor accordingly can increase the maximum input
voltage. 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.

Technical Description
Sealevel Systems DIO-16.PCI Page 4
Sensor Input Port Pin Assignments (P3 DB-37 Male)
Port A Bit P1
02,20
13,21
24,22
35,23
46,24
57,25
68,26
79,27
Output Port (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. Writing a ‘1’ to the proper port bit can individually
energize each relay.
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-16.PCI Page 5
Output Port (Reed Relay) Pin Assignments (P3 DB-37 Male)
Port C Bit Relay P2 Pin
0 K1 10,28
1K2 11,29
2K3 12,30
3 K4 13,31
4 K5 14,32
5K6 15,33
6 K7 16,34
7K8 17,35
Power and Ground Pin Assignments (P3 DB-37 Male)
Ground 18,36,37
+ 5 Volts 19
+ 12 Volts 1
Software
The DIO-16.PCI ships with Sealevel Systems’ SeaI/O suite of Windows
95/98/NT drivers. SeaI/O provides the user with a consistent and
straightforward API, allowing the developer to concentrate on the details of the
application as opposed to low level driver development. Popular development
environments, including Visual C++, Visual Basic, and Delphi, are supported
for application development. SeaI/O includes a utility for configuring the driver
parameters under Windows 95/98 and Windows NT, further simplifying
installation.
For DOS, QNX, Linux and other operating systems, please refer to the
software included with your card.

Technical Description
Sealevel Systems DIO-16.PCI Page 6
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 8002 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.
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 Unused
C2 ( R/W ) 0 ( W ) Output Port (Reed Relays)
DUnused

Technical Description
Sealevel Systems DIO-16.PCI Page 7
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
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