SeaLevel ISO-16.PCI User manual

Part # 8006
Sealevel Systems, Inc
155 Technology Place
P.O. Box 830
Liberty, SC 29657 USA
Phone: [phone]
FAX: [phone]
www.sealevel.com
ISO-16.PCI
USER MANUAL
TM

Contents
INTRODUCTION ...........................................................................................................1
OVERVIEW ....................................................................................................1
WHAT’S INCLUDED.......................................................................................1
INSTALLATION............................................................................................................1
CARD SETUP.................................................................................................1
FOR WINDOWS USERS..................................................................................1
TECHNICAL DESCRIPTION...........................................................................................2
FEATURES.....................................................................................................2
SENSOR INPUT PORTS PIN ASSIGNMENTS......................................................4
SOFTWARE ...................................................................................................4
PROGRAMMING...........................................................................................................5
APPLICATION PROGRAMMERS INTERFACE (API) ..........................................5
Interrupts..................................................................................................5
Relative Addressing Vs. Absolute Addressing.....................................5
DIRECT HARDWARE CONTROL.....................................................................7
Reading the Inputs (direct) :...................................................................7
Interrupts..................................................................................................7
REGISTER DESCRIPTION.................................................................................8
SPECIFICATIONS..........................................................................................................9
ENVIRONMENTAL SPECIFICATIONS................................................................9
POWER CONSUMPTION.................................................................................9
MEAN TIME BETWEEN FAILURES (MTBF)...................................................9
PHYSICAL DIMENSIONS.................................................................................9
APPENDIX A -TROUBLESHOOTING...........................................................................10
APPENDIX B -HOW TO GET ASSISTANCE...............................................................11
APPENDIX C -SILK-SCREEN .....................................................................................12
APPENDIX D -COMPLIANCE NOTICES......................................................................13
FEDERAL COMMUNICATIONS COMMISSION STATEMENT...........................13
EMC DIRECTIVE STATEMENT ...................................................................13
WARRANTY...............................................................................................................14
©2002a Sealevel Systems, Incorporated. All rights reserved.

Introduction
Sealevel Systems ISO-16.PCI Page 1
Introduction
Overview
The ISO-16.PCI provides 16 optically isolated inputs to allow monitoring of
off board switch closures, relays or for any other general purpose monitoring
needs. The ISO-16.PCI is PCI 2.1 bus compliant. Addressing, data and control
signals are TTL compatible.
What’s Included
The ISO-16.PCI is shipped with the following items. If any of these items are
missing or damaged, contact the supplier.
•ISO-16.PCI Interface Adapter
•Sealevel Systems’ Software
Installation
Card Setup
The ISO-16.PCI is a fully compliant PCI ‘Plug and Play’ adapter. All card
resources (i.e. I/O address and IRQ) are auto-assigned by either your system
BIOS or your ‘Plug and Play’ operating system.
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 ISO-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 ISO-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 ISO-16.PCI Page 2
Technical Description
The ISO-16.PCI provides two parallel input ports. Port A and B are interfaced
to optically isolated inputs. 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
Port B Address 301 769 Input Port
Features
•2 eight bit input ports
•DB-37 female connector
•Multiple adapters can reside in same computer
•All address, data, and control signals are TTL compatible
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 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 signal is high enough to cause the opto-isolator to turn-on,
the output of the opto-isolator goes low (0 volts) and the port bit 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).
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. There are 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:

Technical Description
Sealevel Systems ISO-16.PCI Page 3
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, the range of voltages,
and maximum current associated with each.
Input Resistor
(Ohms) Min Turn-On (Volts) Max Input Range (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
Increasing the input resistor accordingly can increase the maximum input
voltage. Because socketed DIP resistor networks are utilized, they can be
replaced with a different value. This can be done at the factory, if necessary.
!!Caution!!
Maximum ratings for inputs are:
•AC –42.4V peak
•DC –60V

Technical Description
Sealevel Systems ISO-16.PCI Page 4
Sensor Input Ports Pin Assignments
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
Note: For ease in wiring, the card’s DB-37 connector can be interfaced
directly to Sealevel's terminal block kit, Part# KT-101. The KT-101 kit,
consisting of a 6 ft. M/F cable and screw terminal block provides a simple
means to connect field wiring to Sealevel 37-pin I/O cards. The Sealevel
Terminal Block provides both male and female DB-37 connectors eliminating
the need for gender benders and other adapters while simplifying cable
connections.
Software
The ISO-16.PCI ships with Sealevel Systems’ SeaI/O suite of
Windows 95/98/ME/NT/2000 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 the different operating systems, further
simplifying installation.
For DOS, QNX, Linux and other operating systems, please refer to the
software included with your card.

Technical Description
Sealevel Systems ISO-16.PCI Page 5
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 for the 8006 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.
Because the 8006 does not have any output ports, the mapping of relative and
absolute addressing is the same.

Technical Description
Sealevel Systems ISO-16.PCI Page 6
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
API Bit # Absolute
Address (function) API Bit # Relative Address (function) Port Bit
0(R) 0 ( R ) A0
1 ( R ) 1 ( R ) A1
2 ( R ) 2 ( R ) A2
3 ( R ) 3 ( R ) A3
4 ( R ) 4 ( R ) A4
5 ( R ) 5 ( R ) A5
6 ( R ) 6 ( R ) A6
7 ( R ) 7 ( R ) A7
8 ( R ) 8 ( R ) B0
9 ( R ) 9 ( R ) B1
10 ( R ) 10 ( R ) B2
11 ( R ) 11 ( R ) B3
12 ( R ) 12 ( R ) B4
13 ( R ) 13 ( R ) B5
14 ( R ) 14 ( R ) B6
15 ( R ) 15 ( R ) B7

Technical Description
Sealevel Systems ISO-16.PCI Page 7
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 8006 provide. The
address of each eight-bit port is calculated as shown in the table on the
following page, the cards base address plus an offset.
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.
Interrupts
Interrupts can be set up as shown on the following page. Port A bit zero is the
interrupt source.
R = Read
W = Write
R/W = Read or Write
Function
Available Port Address Hex Port Type
RABase + 0 Input Port (Opto Input)
RBBase + 1 Input Port

Technical Description
Sealevel Systems ISO-16.PCI Page 8
Register Description
Address Mode D7 D6 D5 D4 D3 D2 D1 D0
Base+0 R/W PAD7 PAD6 PAD5 PAD4 PAD3 PAD2 PAD1 PAD0
Base+1 R/WPBD7 PBD6 PBD5 PBD4 PBD3 PBD2 PBD1 PBD0
Base+2 R{0} {0} {0} {0} {0} {0} {0} {0}
Base+3 R{0} {0} {0} {0} {0} {0} {0} {0}
Base+4 R{0} {0} {0} {0} {0} {0} {0} {0}
Base+5 R/W IRQEN IRQST {0} {0} {0} {0} IRC1 IRC0
Base+6 R {0} {0} {0} {0} {0} {0} {0} {0}
Base+7 R {0} {0} {0} {0} {0} {0} {0} {0}
Note:
Interrupt source is Base+0 bit D0. When selecting the
Interrupt Mode, always disable interrupts prior to
changing or setting states. This will help prevent
inadvertent or un-expected interrupts from occurring.
When using the high and low level interrupts, a change in
state of the input must occur before the interrupt can be
cleared. The device providing the input to Base +0, bit
D0 must do this.
PAD0-7= Port A (Base+0)
PBD0-7= Port B (Base+1)
IRC0-1= Interrupt Mode select (Base+5)
IRC1 IRC0
00low level
01high level
10falling edge
11 rising edge
IRQEN = enable interrupts (Base+5)
0 = disabled
1 = enabled (disabled after reset or
power up).
IRQST = interrupt status (Base+5)
1 = interrupt pending (reading the bit
clears interrupt). Bit can not be written.