Acces I/O products PCIe-COM-8SM User manual

10623 Roselle Street, San Diego, CA 92121 •[phone] •FAX [phone]
[email protected] •www.accesio.com
MODELS
PCIe-COM-8SM, PCIe-COM-4SM,
PCIe-COM485-8, PCIe-COM485-4,
PCIe-COM422-8, PCIe-COM422-4
PCI Express Multi-Port, Multi-Protocol
Low Profile Serial Communications Cards
USER MANUAL
FILE: MPCIe-COM-8SM.A1n

PCIe-COM-8SM / -4SM User Manual
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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.
Printed in USA. Copyright 2010 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.

PCIe-COM-8SM / -4SM User Manual
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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
Figure 1-1: Block Diagram........................................................................................................ 6
Ordering Guide................................................................................................................................ 7
Model Options.................................................................................................................................. 7
Optional Accessories..................................................................................................................... 7
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.......................................................................................................... 11
Figure 3-1: Option Selection Map......................................................................................... 11
Factory Option Descriptions...................................................................................................... 11
Fast RS-232 transceivers (-F) ................................................................................................ 11
Low-profile mounting bracket (-L)........................................................................................ 11
Remote Wake-Up (-W).............................................................................................................. 12
Extended temperature (-T)...................................................................................................... 12
RoHS compliance (-RoHS)...................................................................................................... 12
VHDCI connector........................................................................................................................... 12
Chapter 4: Address Selection........................................................................................................ 13
Chapter 5: Programming................................................................................................................. 14
Sample Programs.......................................................................................................................... 14
Windows COM Utility Program.................................................................................................. 14
Table 5-1: Baud Rate Generator Setting............................................................................. 14
Table 5-2: Sample Baud Rate Setting.................................................................................. 15
Chapter 6: Connector Pin Assignments..................................................................................... 16
Input/Output Connections.......................................................................................................... 16
Table 6-1: DB9 Male Connector Pin Assignments on Standard Cable....................... 16
Figure 6-1: Male DB9 Connector Pin Locations ............................................................... 16
Table 6-2: DB9 Male Connector Pin Assignments on Legacy CAB-PCIe-485-8....... 16
Table 6-3: COM signal names to corresponding signal descriptions ........................ 17
VHDCI 68-Pin D-Connector......................................................................................................... 17
Table 6-4: VHDCI 68-Pin Female D-Connector Pin Assignments ................................ 17
Figure 6-2: VHDCI 68-Pin Female D-Connector Pin Locations..................................... 17
Chapter 7: Specifications ............................................................................................................... 18
Communications Interface......................................................................................................... 18
Environmental................................................................................................................................ 18
Customer Comments....................................................................................................................... 19

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Chapter 1: Introduction
The PCI Express Multiport Serial cards were designed for RS232, RS422 and RS485
asynchronous communications for use in a variety of applications. These boards were
designed to offer compatibility with the PCI Express bus and to be used by system integrators
and manufacturers in the design of industrial and commercial communication systems. The
card is available in 8-port and 4-port versions and is compatible with all popular operating
systems. 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 which are provided via an available cable.
The board features a x1 lane PCI Express connector which can be used in any length PCI
Express slot.
Features
Eight- or four-port PCI Express serial communication cards
Serial protocol (RS-232/422/485) SOFTWARE CONFIGURED per port, stored in
EEPROM for auto-configure at next boot
Low profile PCIe MD2 form factor can be used in standard OR Low Profile computers
High performance 16C950 class UARTs with 128-byte FIFO for each TX and RX
Very high speed card supports communication rates up to 3Mbps (standard model RS-
232 is 460.8kbps)
ESD protection +/-15kV on all signal pins
Full modem control signals in RS-232 mode
Software compatible with all operating systems
Jumper selectable termination for RS-485 applications
3‟ breakout cable available terminating with industry-standard DB9M connectors
Applications
POS (Point-of-sale) 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.
The low profile MD2 form factor allows the card to be installed in small embedded systems.
The card can be used in both a standard profile chassis or in a low profile chassis when used
with the correct mounting bracket. Our PCI Express COM-8SM and -4SM cards ship with a
standard height PCIe mounting bracket installed. This bracket also has threaded inserts
above and below the VHDCI 68-pin connector to facilitate installation of the strengthening
bracket accessory. The industrialized strengthening bracket accessory protects against
damage to the very high density I/O card-mounted connector when side-to-side tension can
occur on the breakout cable.
A crystal oscillator is located on the card. This oscillator permits precise selection of standard
baud rates. Custom baud rates are available on request, please refer to the “Special Order”
paragraph.
Figure 1-1: Block Diagram

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Ordering Guide
PCIe-COM-8SM Eight-port RS-232/422/485 card with breakout cable
PCIe-COM-8SMNC Eight-port RS-232/422/485 card without breakout cable
PCIe-COM-4SM Four-port RS-232/422/485 card with breakout cable
PCIe-COM-4SMNC Four-port RS-232/422/485 card without breakout cable
PCIe-COM485-8 Eight-port 2-wire RS-485 card with breakout cable
PCIe-COM485-8NC Eight-port 2-wire RS-485 card without breakout cable
PCIe-COM485-4 Four-port 2-wire RS-485 card with breakout cable
PCIe-COM485-4NC Four-port 2-wire RS-485 card without breakout cable
PCIe-COM422-8 Eight-port RS-422 (or 4-wire 485) card with breakout cable
PCIe-COM422-8NC Eight-port RS-422 (or 4-wire 485) card without breakout cable
PCIe-COM422-4 Four-port RS-422 (or 4-wire 485) card with breakout cable
PCIe-COM422-4NC Four-port RS-422 (or 4-wire 485) card without breakout cable
Model Options
-T Extended Operating Temperature of -40°C to +85°C
-F Fast RS-232 transceivers (up to 921.6kbps)
-RoHS RoHS compliant version
-W Wake-up enable (see Chapter 3: Hardware Details)
-L Low-profile mounting bracket
Optional Accessories
BRKT-551-SCB
Strengthening bracket
(for use with standard height PCIe bracket only)
ADAP9
Screw terminal adaptor DB9F to 9 screw terminals
ADAP9-2
Screw terminal adaptor with two DB9F connectors and 18
screw terminals
CAB-PCIe-485-8
3‟ light beige breakout DB9M cable pin-compatible with legacy
2-wire RS-485 products such as PCI-COM485-8

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Special Order
Virtually any custom baud rate can be achieved with the standard card (see Table 5-2: Higher
Baud Rate Register Settings) and still be within the standard tolerance range for 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 specials:
conformal coating, custom software, RJ-45 connectivity, special breakout boxes, 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.
Eight- or four-port card with standard height mounting bracket
3‟ breakout cable to DB9M connectors
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 a cable onto the card‟s bracket mounted connector
7. If you purchased the optional DB9M breakout cable, you may have also purchased the
connector / cable stabilization bracket, which should be installed at this time
Figure 2-1: Port Configuration Utility Screenshot
.
8. Replace the computer cover and turn ON the computer.
9. Most computers should auto-detect the card (depending on the operating system) and
automatically finish installing the drivers.
10. Run the Port Configuration Utility program (setup.exe) to configure the protocol (RS-
232/422/485) for each COM port.
11. 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.

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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-
485 lines. Channel protocols are selected via software.
Figure 3-1: Option Selection Map
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.
Low-profile mounting bracket (-L)
For system designers where space is limited we offer a low profile mounting bracket option.
The strengthening bracket accessory can not be used with this option.

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Remote Wake-Up (-W)
The “Remote Wake-Up” factory option is for use in applications where the host computer (the
one this card would be installed in) enters the L2 low-power state where it‟s main power is
turned off though VAUX is still applied. When the Ring Indicator is received on serial port
channel 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.
VHDCI connector
These cards use an Amphenol 68-pin VHDCI (Very High Density Cable Interconnect)
connector. They are SCSI-III type, female, right-angle with screw locks and a 1.6mm pitch.

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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. These COM designations correlate to the corresponding DB9
on breakout cable, which are labeled as such.
Please note - for 4-port card versions, the ports will be installed as:
COM A, COM B, COM C and COM H.
The breakout cable will have the corresponding port labels near the DB9 connectors.
The Vendor ID for all cards is 494F.
The Device ID for the PCIe-COM-8SM card is 10E9h.
The Device ID for the PCIe-COM422-8 card is 106Ah.
The Device ID for the PCIe-COM485-8 card is 106Bh.
The Device ID for the PCIe-COM-4SM card is 10D9h.
The Device ID for the PCIe-COM422-4 card is 105Ah.
The Device ID for the PCIe-COM485-4 card is 105Bh.

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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 out your COM ports.
Windows Programming
The card installs into Windows as COM ports so standard API functions can be used:
►CreateFile() and CloseHandle() for opening and closing a port.
►SetupComm(), SetCommTimeouts(), GetCommState(), and SetCommState() to set
and change a port‟s settings.
►ReadFile() and WriteFile() for accessing a port.
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
We re-define the parameter of "Baudrate" on DCB structure,
Bit[30:28]: User Defined Baudrate, this value has to be non-zero
Bit[27:24]: to indicate the value of SCR (SampleClock)
Bit[23:16]: to indicate the value to put in DLH
Bit[15:8]: to indicate the value to put in DLL
Bit[7:3]: to indicate the value to put in M (CPRM)
Bit[2:0]: to indicate the value to put in N (CPRN)
If you want to set
DLL=1
DLH=0
SCR=12
then, the parameters of Baudrate in the DCB structure should be set to 0x1c000108. When
the driver finds the parameter "Baudrate" does not exist on the default baudrate table, and Bit
28 is set to "1", it will get the values of SCR, DLL, DLH, M and N from the Baudrate parameter
and set to the registers directly.

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Chapter 6: Connector Pin Assignments
Input/Output Connections
The serial communications ports are interfaced at the card mounting bracket via a female 68-
pin VHDCI D-connector. There are two different breakout cables available terminating in eight
(or four) individual D-sub 9-pin connectors. These cables are permanently labeled near each
DB9 connector with the port letter. The cable that ships as standard is black PVC and the
DB9 pin-out is listed in Table 6-1. Four port cards ordered with a breakout cable will have four
D-sub 9-pin connectors, labeled as COM A, COM B, COM C and COM H.
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 on Standard Cable
Figure 6-1: Male DB9 Connector Pin Locations
For applications that require a 2-wire RS-485 pin-out that is compatible with our PCI-COM485-
8 card and breakout cable, specify the card model ending in “NC” (no cable) and the legacy
cable (see ordering guide). This legacy compatibility cable is easily identified as it is light
beige in color, while the standard cable is black molding with a black cable jacket. The RS-485
pin-out for the DB9 connectors on that cable follows:
PIN
2-Wire RS-485
1
TX/RX-
2
TX/RX+
3
TX/RX-
4
-
5
GND
6
-
7
-
8
-
9
TX/RX+
Table 6-2: DB9 Male Connector Pin Assignments on Legacy CAB-PCIe-485-8

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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 6-3: COM signal names to corresponding signal descriptions
VHDCI 68-Pin D-Connector
Connections will normally be made to the D-Sub 9-pin connectors through the breakout cable.
In case you wish to connect directly to the 68-pin connector, the pins translate as follows.
DB9 pins
To
VHDCI pins
Ch A
Ch B
Ch C
Ch D
Ch E
Ch F
Ch G
Ch H
1
37
41
45
49
53
57
61
65
2
1
5
9
13
17
21
25
29
3
2
6
10
14
18
22
26
30
4
3
7
11
15
19
23
27
31
5
331
331
331
331
672
672
672
672
6
38
42
46
50
54
58
62
66
7
35
39
43
47
51
55
59
63
8
36
40
44
48
52
56
60
64
9
4
8
12
16
20
24
28
32
Table 6-4: VHDCI 68-Pin Female D-Connector Pin Assignments
Figure 6-2: VHDCI 68-Pin Female D-Connector Pin Locations
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: 68-pin female VHDCI SCSI-Type III connector with screw locks
Serial ports: 8 or 4 RS-232/422/485 ports
Serial data rates: Up to 3M baud asynchronous (460.8k standard for RS-232)
UART: Octal type 16C950 with 128-byte transmit & receive FIFO,
16C550 compliant
Character length: 5, 6, 7, or 8 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
Cable: 3‟ shielded breakout cable terminated with male D-sub 9-
pin connectors
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 at 0.9W (typical)
Size: 6.6 inches long x 2.20 inches high
(167.64 mm long x 55.8mm 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