Acces I/O products PCIe-ICM-4SM User manual

10623 Roselle Street, San Diego, CA 92121 •[phone] •FAX [phone]
[email protected] •www.accesio.com
MODEL
PCIe-ICM-4SM, PCIe-ICM-2SM
PCIe-ICM-4S, PCIe-ICM-2S
PCIe-ICM232-4, PCIe-ICM232-2
PCI Express Isolated 4- and 2- Port
RS-232/422/485
Serial Communication Cards
USER MANUAL
FILE: MPCIe-ICM-4SM.A1c

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Notice
The information in this document is provided for reference only. ACCES does not assume any liability arising
out of the application or use of the information or products described herein. This document may contain or
reference information and products protected by copyrights or patents and does not convey any license under
the patent rights of ACCES, nor the rights of others.
IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation.
Copyright by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121. All rights reserved.
WARNING!!
ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE
COMPUTER POWER OFF. ALWAYS TURN COMPUTER POWER OFF
BEFORE INSTALLING A CARD. CONNECTING AND DISCONNECTING
CABLES, OR INSTALLING CARDS INTO A SYSTEM WITH THE
COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I/O
CARD AND WILL VOID ALL WARRANTIES, IMPLIED OR EXPRESSED.

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Warranty
Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications. However,
should equipment failure occur, ACCES assures its customers that prompt service and support will be available.
All equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced
subject to the following considerations.
Terms and Conditions
If a unit is suspected of failure, contact ACCES' Customer Service department. Be prepared to give the unit
model number, serial number, and a description of the failure symptom(s). We may suggest some simple tests
to confirm the failure. We will assign a Return Material Authorization (RMA) number which must appear on the
outer label of the return package. All units/components should be properly packed for handling and returned
with freight prepaid to the ACCES designated Service Center, and will be returned to the customer's/user's site
freight prepaid and invoiced.
Coverage
First Three Years: Returned unit/part will be repaired and/or replaced at ACCES option with no charge for labor
or parts not excluded by warranty. Warranty commences with equipment shipment.
Following Years: Throughout your equipment's lifetime, ACCES stands ready to provide on-site or in-plant
service at reasonable rates similar to those of other manufacturers in the industry.
Equipment Not Manufactured by ACCES
Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms
and conditions of the respective equipment manufacturer's warranty.
General
Under this Warranty, liability of ACCES is limited to replacing, repairing or issuing credit (at ACCES discretion)
for any products which are proved to be defective during the warranty period. In no case is ACCES liable for
consequential or special damage arriving from use or misuse of our product. The customer is responsible for all
charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or, if in
ACCES opinion the equipment has been subjected to abnormal use. "Abnormal use" for purposes of this
warranty is defined as any use to which the equipment is exposed other than that use specified or intended as
evidenced by purchase or sales representation. Other than the above, no other warranty, expressed or implied,
shall apply to any and all such equipment furnished or sold by ACCES.

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TABLE OF CONTENTS
Chapter 1: Introduction..................................................................................................................... 5
Features............................................................................................................................................. 5
Applications...................................................................................................................................... 5
Functional Description.................................................................................................................. 6
Isolation............................................................................................................................................. 6
Figure 1-1: Block Diagram........................................................................................................ 7
Ordering Guide................................................................................................................................ 7
Model Options.................................................................................................................................. 7
Optional Accessories..................................................................................................................... 8
Special Order.................................................................................................................................... 8
Included with your board.............................................................................................................. 8
Chapter 2: Installation........................................................................................................................ 9
CD Software Installation................................................................................................................ 9
Hardware Installation................................................................................................................... 10
Figure 2-1: Port Configuration Utility Screenshot............................................................ 10
Chapter 3: Hardware Details.......................................................................................................... 12
Figure 3-1: Option Selection Map......................................................................................... 12
DB9M connector........................................................................................................................ 12
Factory Option Descriptions...................................................................................................... 13
Fast RS-232 transceivers (-F) ................................................................................................ 13
Remote Wake-Up (-W).............................................................................................................. 13
Extended temperature (-T)...................................................................................................... 13
RoHS compliance (-RoHS)...................................................................................................... 13
Chapter 4: Address Selection........................................................................................................ 14
Chapter 5: Programming................................................................................................................. 15
Sample Programs.......................................................................................................................... 15
Windows COM Utility Program.................................................................................................. 15
Table 5-1: Baud Rate Generator Setting............................................................................. 15
Table 5-2: Sample Baud Rate Setting.................................................................................. 16
Chapter 6: Connector Pin Assignments..................................................................................... 17
Input/Output Connections.......................................................................................................... 17
Table 6-1: DB9 Male Connector Pin Assignments........................................................... 17
Figure 6-1: DB9 Male Connector Pin Locations ............................................................... 17
Table 6-2: COM signal names to corresponding signal descriptions ........................ 17
Chapter 7: Specifications ............................................................................................................... 18
Communications Interface......................................................................................................... 18
Environmental................................................................................................................................ 18
Customer Comments....................................................................................................................... 19

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Chapter 1: Introduction
These PCI Express Multiport Isolated Serial cards were designed for RS232, RS422 and
RS485 asynchronous communications for use in a variety of applications. These boards offer
compatibility with the PCI Express bus and are used by system integrators and manufacturers
in the design of industrial communication systems. The cards are available in 4-port and 2-
port versions and are compatible with all popular operating systems. The protocol (type) of
each port is software selectable between RS232/RS422/RS485 depending on the model
ordered. Each COM port is capable of supporting data rates up to 3Mbps (460.8kbps in
RS232 mode is standard) and implements full RS-232 modem control signals to ensure
compatibility with a wide range of serial peripherals. Existing serial peripherals can connect
directly to the industry standard DB9M connectors. The board features a x1 lane PCI Express
connector which can be used in any length PCI Express slot.
Features
•4- and 2-port PCI Express serial communication cards with on board DB9M
connectivity
•2000V isolation port to port and port to computer
•Serial protocol (RS-232/422/485) SOFTWARE CONFIGURED per port, stored in
EEPROM for auto-configure at next boot
•High performance 16C950 class UARTs with 128-byte FIFO for each transmit and
receive buffer
•Supports data communication speeds up to 3Mbps (standard model RS-232 is
460.8kbps)
•ESD protection +/-15kV on all signal pins
•Supports 9-bit data mode
•Full modem control signals in RS-232 mode
•Software compatible with all operating systems
•Jumper selectable termination for RS-422/485 applications
Applications
•POS (Point-of-Sale) Systems
•Shipboard Data Communication and Control Systems
•Gaming Machines
•Telecommunications
•Industrial Automation
•ATM (Automated Teller Machine) Systems
•Multiple terminal control
•Office Automation
•Kiosks

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Functional Description
These cards feature high performance 16C950 class UARTs which support the complete
register set of the standard 16C550-type devices. The UARTs support operations in 16C450,
16C550 and 16C950 modes. Each port is capable of data communication speeds up to
3Mbps (standard model up to 460.8kbps in RS-232 mode) in asynchronous mode and has
128-byte deep transmit and receive FIFOs to protect against lost data in multitasking
operating systems, to help reduce CPU utilization and to improve data throughput. A crystal
oscillator is located on the card which permits precise selection of baud rates.
Serial protocol (RS-232/422/485) is software configured per port via a Port Configuration
Utility provided on the CD which ships with each card. When RS-422 or RS-485 are selected,
jumper selectable termination is provided per port.
Four-port models (PCIe-ICM-4SM, PCIe-ICM-4S, PCIe-ICM232-4) ship with an additional
mounting bracket and cable. This plugs directly into the dual 10-pin IDC headers on board and
mounts to an adjacent bracket slot.
Isolation
Ground loops –current flowing through the ground line when ground voltage levels differ
between connected devices –are a common problem frequently encountered in many
industrial applications. This situation can result in an increasing common-mode voltage
produced by the difference in ground levels and also by induced voltage typically from parallel
cabling that is carrying current to electrical equipment. Once the common-mode voltage
exceeds the capability of the transceivers to reject it, they stop communicating. Isolating serial
ports eliminates the effects of this problem and protects the computer system in harsh
industrial environments. RS-232 communications are even more susceptible to this condition
due to this architecture being only single-ended. This card is rated for 2,000V isolation from
port-to-port and port to computer for such applications.

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Figure 1-1: Block Diagram
Ordering Guide
•PCIe-ICM-4SM PCI Express isolated four-port RS-232/422/485*
•PCIe-ICM-4S PCI Express isolated four-port RS-422/485*
•PCIe-ICM232-4 PCI Express isolated four-port RS-232*
•PCIe-ICM-2SM PCI Express isolated two-port RS-232/422/485
•PCIe-ICM-2S PCI Express isolated two-port RS-422/485
•PCIe-ICM232-2 PCI Express isolated two-port RS-232
*Four-port models require the use of a provided additional mounting bracket.
Model Options
•-T Extended temp. operation (-40° to +85°C)
•-F Fast version (RS-232 up to 921.6kbps)
•-RoHS RoHS compliant version
•-W Remote wake-up enable (see Chapter 3: Hardware Details)

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Optional Accessories
ADAP9
Screw terminal adaptor DB9F to 9 screw terminals
ADAP9-2
Screw terminal adaptor with two DB9F connectors and 18
screw terminals
Special Order
Virtually any custom baud rate can be achieved with the standard card (see Table 5-2:
Sample Baud Rate Setting) and still be within the standard tolerance range for asynchronous
serial communications. If that method doesn’t produce an exact enough baud rate a custom
crystal oscillator may be specified, contact factory with your precise requirement. Other
examples of special orders would be conformal coating, custom software, etc., we will work
with you to provide exactly what is required.
Included with your board
The following components are included with your shipment, depending on options ordered.
Please take the time now to ensure that no items are damaged or missing.
•Four- or two-port card
•2 x Header to 2 x DB9M cable/bracket for Four-port model cards
•Software Master CD
•Quick-Start Guide

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Chapter 2: Installation
A printed Quick-Start Guide (QSG) is packed with the card for your convenience. If you’ve
already performed the steps from the QSG, you may find this chapter to be redundant and
may skip forward to begin developing your application.
The software is provided with this card on the CD and must be installed onto your hard disk
prior to use. Perform the following steps as appropriate for your operating system.
A complete driver support package is provided including an easy-to-use Windows terminal
program for testing out your COM ports. This simplifies the verification of proper COM port
operating. The card installs as standard COM ports in all operating systems.
A software reference manual is installed as part of the software and support package for this
product. Please refer to this document for extensive information and guidance on software
tools and programming support at your disposal.
CD Software Installation
The following instructions assume the CD-ROM drive is drive “D”. Please substitute the
appropriate drive letter for your system as necessary.
DOS 1. Place the CD into your CD-ROM drive.
2. Type  to change the active drive to the CD-ROM drive.
3. Type  to run the install program.
4. Follow the on-screen prompts to install the software for this board.
Windows
1. Place the CD into your CD-ROM drive.
2. The system should automatically run the install program. If the install program does not
run promptly, click START | RUN and type , click OK or press .
3. Follow the on-screen prompts to install the software for this board.
Linux 1. Please refer to linux.htm on the CD-ROM for information on installing under linux.
Note: COM boards can be installed in virtually any operating system. We do support
installation in earlier versions of Windows, and are also likely to support future versions.

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Hardware Installation
Caution! * ESD A single static discharge can damage your card and cause
premature failure! Please follow all reasonable precautions to
prevent a static discharge such as grounding yourself by touching
any grounded surface prior to touching the card.
1. Do not install the card into the computer until the software has been fully installed.
2. Turn OFF computer power AND unplug AC power from the system.
3. Remove the computer cover.
4. Carefully install the card in an available PCIe expansion slot (you may need to remove a
backplate first).
5. Inspect for proper fit of the card and install and tighten the mounting bracket screw. Make
sure that the card mounting bracket is properly screwed into place and that there is a
positive chassis ground.
6. Install the header to DB9M cable accessory in an adjacent mounting bracket / slot
location. Tighten the mounting bracket screw.
Figure 2-1: Port Configuration Utility Screenshot
.
7. Replace the computer cover and turn ON the computer.
8. Most computers should auto-detect the card (depending on the operating system) and
automatically finish installing the drivers.
9. Run the Port Configuration Utility program (setup.exe) to configure the protocol (RS-
232/422/485) for each COM port.
10. Run one of the provided sample programs that was copied to the newly created card
directory (from the CD) to test and validate your installation.
Important: It is necessary to disable "hardware handshaking" (DTR) in your
communication program when operating in RS485 or RS422 mode.

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Chapter 3: Hardware Details
There only user-selectable options for this card are for applying a termination load to the RS-
422 or RS-485 lines. Channel protocols are selected via software.
Figure 3-1: Option Selection Map
DB9M connector
Industry standard 9-pin Male D-Subminiature connector with screw locks.

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Factory Option Descriptions
Fast RS-232 transceivers (-F)
The standard RS-232 transceivers used are capable of speeds up to 460.8kbps which is
adequate in many applications. For this factory option, the board is populated with high-speed
RS-232 transceivers enabling error-free communications at up to 921.6kbps.
Remote Wake-Up (-W)
The “Remote Wake-Up” factory option is for use in RS232 mode when your PC enters the L2
low-power state. When the Ring Indicator is received on serial port COM A in the L2 power
state, Wake-Up is asserted.
Extended temperature (-T)
This factory option is for use in harsh environments and is populated with all-industrial rated
components, specified at a minimum temperature range of -40°C to +85°C.
RoHS compliance (-RoHS)
For international customers and other special requirements, this factory option is available in
RoHS compliant versions.

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Chapter 4: Address Selection
The card uses one I/O address space PCI BAR[0]. COM A, COM B, COM C, COM D, COM E,
COM F, COM G and COM H each occupy eight consecutive register locations.
The Vendor ID is 494F.
The Device ID for the PCIe-ICM-4SM card is 11D8h.
The Device ID for the PCIe-ICM-4S card is 115Ah.
The Device ID for the PCIe-ICM232-4 card is 1198h.
The Device ID for the PCIe-ICM-2SM card is 11D0h.
The Device ID for the PCIe-ICM-2S card is 1152h.
The Device ID for the PCIe-ICM232-2 card is 1190h.

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Chapter 5: Programming
Sample Programs
There are sample programs with source-code provided with the card in a variety of common
languages. DOS samples are located in the DOS directory and Windows samples are located
in the WIN32 directory.
Windows COM Utility Program
WinRisc is a COM utility program provided on CD with the installation package for this card
that is very useful when working with any serial ports and serial devices. If you haven’t used
this program yet, do yourself a favor and run this program to test your COM ports.
Windows Programming
The card installs into Windows as COM ports so standard API functions can be used.
See the documentation for your chosen language for details.
In DOS the process is identical to programming 16550- compatible UARTs.
Baud Rate Generation
The built-in Baud Rate Generator (BRG) allows a wide range of input frequency and flexible
Baud Rate generation. To obtain the desired Baud Rate, the user can set the Sample Clock
Register (SCR), Divisor Latch Low Register (DLL), Divisor Latch High Register (DLH) and
Clock Prescale Registers (CPRM and CPRN). The Baud Rate is generated according to the
following equation:
The parameters in the equation above can be programmed by setting the “SCR”, “DLL”,
“DLH”, “CPRM” and “CPRN” registers according to the table below.
Setting
Description
Divisor
DLL + (256 * DLH)
Prescaler
2M-1*(SampleClock + N)
SampleClock
16 - SCR , (SCR = ‘0h’ to ‘Ch’)
M
CPRM, (CPRM = ‘01h’ to ‘02h’)
N
CPRN, (CPRN = ‘0h’ to ‘7h’)
Table 5-1: Baud Rate Generator Setting

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To ensure the proper operation of the Baud Rate Generator, users should avoid setting the
value ‘0’ to Sample Clock, Divisor and Prescaler.
The following table lists some of the commonly used Baud Rates and the register settings that
generate a specific Baud Rate. The examples assume an Input Clock frequency of 14.7456
Mhz. The SCR register is set to ‘0h’, and the CPRM and CPRN registers are set to ‘1h’ and
‘0h’ respectively. In these examples, the Baud Rates can be generated by different
combination of the DLH and DLL register values.
Baud Rate
DLH
DLL
1,200
3h
00h
2,400
1h
80h
4,800
0h
C0h
9,600
0h
60h
19,200
0h
30h
28,800
0h
20h
38,400
0h
18h
57,600
0h
10h
115,200
0h
08h
921,600
0h
01h
Table 5-2: Sample Baud Rate Setting

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Chapter 6: Connector Pin Assignments
Input/Output Connections
The serial communications ports are interfaced at the card and adjacent mounting brackets
via 4x DB9M connectors.
PIN
RS-232
RS-422 and
4-Wire RS-485
2-Wire RS-485
1
DCD
TX-
-
2
RX
TX+
-
3
TX
RX+
TX+/RX+
4
DTR
RX-
TX-/RX-
5
GND
GND
GND
6
DSR
-
-
7
RTS
-
-
8
CTS
-
-
9
RI
-
-
Table 6-1: DB9 Male Connector Pin Assignments
Figure 6-1: DB9 Male Connector Pin Locations
RS-232
Signals
RS-232 Signal
Descriptions
RS-422
Signals
(4-w 485)
RS-422 Signal
Descriptions
RS-485
Signals
(2-wire)
RS-485 Signal
Descriptions
DCD
Data Carrier Detected
TX+
Transmit Data +
TX/RX +
Transmit / Receive +
RX
Receive Data
TX-
Transmit Data -
TX/RX -
Transmit / Receive -
TX
Transmit Data
RX+
Receive Data +
GND
Signal Ground
DTR
Data Terminal Ready
RX-
Receive Data -
GND
Signal Ground
GND
Signal Ground
DSR
Data Set Ready
RTS
Request To Send
CTS
Clear to Send
RI
Ring Indicator
Table 6-2: COM signal names to corresponding signal descriptions
To ensure that there is minimum susceptibility to EMI and minimum radiation, it is important
that the card mounting bracket be properly screwed into place and that there be a positive
chassis ground. Also, proper EMI cabling techniques (cable connect to chassis ground at the
aperture, shielded twisted-pair wiring, etc.) should be used for the input/output wiring.

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Chapter 7: Specifications
Communications Interface
•I/O connection: DB9M
•Serial ports: 4 (or 2) RS-232/422/485
•Isolation: 2000V isolation port to port and port to computer
•Serial data rates: RS-232 460.8k (921.6k avail)
RS-422/485 3Mbps
•UART: Quad type 16C950 with 128-byte transmit & receive FIFO,
16C550 compliant
•Character length: 5, 6, 7, 8, or 9 bits
•Parity: Even, Odd, None, Space, Mark
•Stop interval: 1, 1.5, or 2 bits
•Flow Control: RTS/CTS and/or DSR/DTR, Xon/Xoff
•ESD Protection: ±15kV on all signal pins
Environmental
•Operating temp.: Commercial: 0°C to +70°C
Industrial: -40°C to +85°C
•Storage temp.: -65°C to +150°C
•Humidity: 5% to 95%, non-condensing
•Power required: +3.3VDC @ 0.8W (typical)
+12VDC @ 0.9W (typical)
•Size: 6.600“ long x 4.200” high
(167.65 mm long x 106.68 mm high)

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Customer Comments
If you experience any problems with this manual or just want to give us some feedback, please email
us at: [e-mail]. Please detail any errors you find and include your mailing address so
that we can send you any manual updates.
10623 Roselle Street, San Diego CA 92121
Tel. [phone] FAX [phone]
www.accesio.com