This is an Electrostatic Sensitive Device. Use ESD precautions for safe
handling.
Before removing the card from the anti-static protective packaging:
Discharge any static electricity buildup on your body by touching a large
grounded metal surface or the metal chassis on equipment connected
to earth ground by a 3-wire power cord. Use of a grounding wrist strap
is recommended.
Avoid touching the gold connectors or other parts on the card except
when necessary to set the configuration DIP switches.
Remove AC power from the computer before inserting the card
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Document Number 3PCI-0712m Table of Contents i
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TABLE OF CONTENTS ...........................................................................................II
CHAPTER 1: GENERAL INFORMATION ........................................................... 1
LOOPBACK TESTING WITH COMTEST ......................................................................... 6
iv Table of Contents Document Number 3PCI-0712m
General Information
Introduction
MIport PCI serial interface cards allow you to add RS-232, RS-422 and RS-485
interfaces to Windows based computers equipped with a PCI bus. Depending on your
choice of card one, two or four optically isolated serial ports, or two, four or eight nonisolated serial ports, can be added. MIport PCI serial cards are Plug and Play
compatible, which allows the Windows Operating System and driver to set the
addresses and IRQ used by the card.
Figure 1. A 3PCIOU2 Optically Isolated Two-Port PCI Serial Interface
Features
Optically isolated or non-isolated models available
Isolated models available in 1, 2 or 4 ports
Non-isolated models available in 2, 4 or 8 ports
4 and 8 port models include fanout cables
Plug & Play compatible – Windows sets addresses and IRQ used
5 volt and 3.3 volt PCI bus compatible
PCI-X compatible
Conform to the PCI V2.3 Universal PCI specification
RS-232/RS-422/RS-485 interfaces
2-wire or 4-wire RS-485 operation (half or full-duplex)
Automatic Send Data Control for RS-485 operation
Buffered high speed XR17D15x PCI Bus UARTs (16C550 compatible) with 64 byte
FIFOs for input/output with programmable trigger thresholds
Advanced driver function for COM port rename (Refer to Chapter 4)
Supports baud rates up to 460.8 kbps
Windows XP, Windows 2008 Server (32/64 bit), Windows Vista (32/64 bit),
Windows 7 (32/64 bit), Linux Kernel 2.6.x is also supported in the following
distributions: Ubuntu 10.04 Desktop Edition (32/64 bit), Ubuntu 10.04 Server
Windows XP, Windows 2008 Server (32/64 bit), Windows Vista (32/64 bit),
Windows 7 (32/64 bit), Linux Kernel 2.6.x is also supported in the following
distributions: Ubuntu 10.04 Desktop Edition (32/64 bit) and Ubuntu Server
Edition (32/64 bit).
Bus
Slot
PCI bus (33MHz/32-bit) PCI Bus specification
Requires one PCI slot (3.3V or 5V signaling)
Baud Rates
Maximum: Up to 460.8 kbps (RS-232/422/485)
Typical: 75, 110, 134, 150, 300, 600, 1200, 1800, 2400, 4800,
7200, 9600, 14.4k, 19.2k, 38.4k, 57.6k, 115.2k,
230.4k, 460.8k
UARTs
XR17D15x (16C550 compatible) with 64 byte FIFO buffers
Character Length
Parity
Stop Bits
5, 6, 7 or 8 bits
Even, odd, none, space or mark
1, 1.5 or 2
Optical Isolation
(3PCIOU1,
3PCIOU2,
3PCIOU4 only)
2000 VDC minimum on all lines
Ports are isolated from the PC power and ground, as well as other ports on
the same card.
Connectors
3PCIOU1: 1 – DB-9 male
3PCIOU2: 2 – DB-9 male
3PCIOU4: 2 – DB-9 male (RS-232/422/485 ports)
2 – DB-9 male via ribbon cable on 2nd expansion slot
bracket (RS-422/485 ports)
3PCIU2: 2 – DB-9 male
3PCIU4: 1 – DB-37 female with DB-37 to 4 x DB-9 male
cable
3PCIU8: 1 - DB-78 female with DB-78 to 8 x DB-9 male
cable (4 x RS-232/422/485 and 4 x RS-232)
Data Signals
RS-232: TD, RD, RTS, CTS, DTR, DSR, DCD, RI and GND
(TD, RD, RTS, CTS, GND only on 3PCIOU4)
RS-422: TD(A)-, TD(B)+, RD(A)-, RD(B)+ and GND
RS-485: Data(A)-, Data(B)+ and GND
Environmental
Operating temperature range: 0º to 50ºC minimum
Operating humidity: 5% to 95%, non-condensing
Dimensions
4.8 x 3.8 in (12.2 x 9.6 cm) card edge
(Mounting bracket, 1.2 x 12.1 x 0.9 cm)
Accessories
Software: Driver CD-ROM disc for Windows 98, ME, NT,
4.0, 2000, 2003 Server, XP, Vista, and Linux 2.4
Manual: Instruction Manual Contained on CD ROM
Specifications
4 Chapter 1 Document Number 3PCI-0712m
Figure 4. MIport Serial Card Specifications
Serial Card Setup
CAUTION:
This is an Electrostatic Sensitive Device. Use ESD precautions for
safe handling.
Before removing the card from the anti-static protective packaging:
Discharge any static electricity buildup on your body by touching a large
grounded metal surface or the metal chassis on equipment connected to
earth ground by a 3-wire power cord. Use of a grounding wrist strap is
recommended.
Avoid touching the gold connectors or other parts on the card except
when necessary to set the configuration DIP switches.
Remove AC power from the computer before inserting the card
The following Serial Card Setup section applies to the following PCI cards:
3PCIOU1 one port optically isolated PCI serial card
3PCIOU2 two port optically isolated PCI serial card
3PCIOU4 four port optically isolated PCI serial card
3PCIU2 two port non-isolated PCI serial card
3PCIU4 four port non-isolated PCI serial card
3PCIU8 eight port non-isolated PCI serial card
Any deviations from the procedure for specific models are noted.
Pre-Setup Steps
Your serial card has been tested for proper operation before packaging and shipping. It
should be in perfect mechanical and electrical condition upon receipt.
ESD Precautions
To ensure a successful installation and setup it is important that you follow the standard
ESD precautions outlined below:
Initial Configuration
The ports in your MIport card are normally pre-configured for RS-232 operation. To ensure
the card is configured correctly for your desired operating mode, you will have to check
and/or set the three operating mode DIP switches on the card. If you are configuring for
RS-485 Mode you also may have to set up the RTS Control parameter in the device driver.
Document Number 3PCI-0712m Chapter 2 5
Note: Refer to Chapter 4 for information on Setting Driver Options.
Serial Card Setup
Overview of Operational Modes
RS-232 Mode
In RS-232 Mode MIport serial ports function as buffered standard PC serial ports and
operate as DTEs (Data Terminal Equipment). RS-232 interfaces are commonly used for
communications with modems, serial printers, and computer-controlled devices such as
security equipment, bar code scanners and point-of-sale devices.
For most MIport models, RS-232 Mode supports eight single-ended signal lines and
signal ground (GND) including transmit (TD), receive (RD) and six hardware handshake
lines (DTR, DSR, RTS, CTS, DCD, RI). The only exception to this is the MIport Model
3PCIOU4 card, which supports TD, RD, RTS, CTS and GND.
RS-422 Mode
In RS-422 mode MIport serial ports provide two sets of differential signal pairs (TD and
RD) and signal ground for each port. The RS-422 standard uses balanced differential
drivers and receivers for each signal. This facilitates greater communication distances
than unbalanced systems such as RS-232. In RS-422 mode the transmitter and
receiver are always enabled (TX ON, RX ON).
RS-422 operation is suitable for interconnecting a computer and one device for full
duplex (point-to-point) bi-directional communication, or a computer and several devices
for unidirectional (point-to-multipoints) communication. RS-422 interfaces are commonly
used for video editing/control, camera control, electronic signage, television
studio/satellite dish control, performance lighting and audio equipment control.
RS-485 Mode
In RS-485 Mode MIport cards provide RS-485 interfaces which operate with the same
signals and signal levels as RS-422. RS-485 interfaces differ from RS-422 in that they
allow multiple devices to share the same communication link using half duplex (2-wire)
or full duplex (4-wire) connections. Since it is possible to have more than one
transmitter connected to the media, transmitters must be enabled only while sending
data, and tri-stated at all other times so other devices can use the wire pair. MIport
cards automatically enable the transmitter at the appropriate time using Automatic Send
Data Control, based on the contents of the output buffer. When the buffer has data to
send, the transmitter is enabled (TX SD). When all data in the buffer has been sent, the
transmitter is disabled and tri-stated to a high impedance state.
In half-duplex operation, the receiver is disabled during transmit (RX ), and enabled
when not transmitting. In full-duplex operation the receiver is always enabled (RX ON).
Since RS-485 transmitters are tri-stated when not transmitting, the receive inputs must
be biased to ensure the media floats in the Mark state so that the first Space state is
detected correctly at the start of the next transmission.
These serial cards incorporate the necessary biasing to accommodate up to 32
standard nodes. (Typical input resistance (Rin) for each load is 12kΩ). Provisions are
made for custom biasing and/or termination.
Note: For more information on RS-485 Mode refer to Chapter 6
6 Chapter 2 Document Number 3PCI-0712m
Serial Card Setup
422/485
TX On
RX On
232
TX SD
RX SD
Switch 1
Switch 2
Switch 3
RS-232 Mode
422/485
TX On
RX On
232
TX SD
RX SD
RS-422 Mode
422/485
TX On
RX On
232
TX SD
RX SD
4-wire RS-485 Mode
422/485
TX On
RX On
232
TX SD
RX SD
2-wire RS-485 Mode
Operating Mode Selection
The hardware address and IRQ for the serial card is set by the Windows Operating
System using driver information files and the Plug and Play OS.
The Operating Mode is set using DIP switches, Device Manager Driver Settings and by
your cable connections and software. Each port on a MIport card has an associated DIP
switch to set its operating mode. The port number associated with the DIP switch is
clearly silk screened on the printed circuit board.
Note: Refer to Appendix x for DIP switch locations on various MIport
cards.
Setting the DIP Switches on RS-232/422/485 Ports
Set the DIP switches to configure the desired operating mode as follows:
DIP Switch 1 (RS-232/422/485 ports)
The top DIP switch (1) configures the port for RS-232 or RS-422/485 operation. This
switch is the only one that is required to be set for RS-232 operation. The positions of
switches 2 and 3 do not matter when switch 1 is set for RS-232 operation.
DIP Switch 2 (RS-232/422/485 ports)
The middle DIP switch (2) configures the port for RS-485 or RS-422 operation. For RS422 operation (which uses two wire pairs and sends point-to-point or point-to-
Document Number 3PCI-0712m Chapter 2 7
Figure 5. RS-232/422/485 DIP Switch Settings.
Serial Card Setup
TX On
RX On
TX SD
RX SD
Switch 1
Switch 2
RS-422 Mode
TX On
RX On
TX SD
RX SD
4-wire RS-485 Mode
TX On
RX On
TX SD
RX SD
2-wire RS-485 Mode
multipoints) the transmitter can be enabled all the time. Placing the middle DIP switch in
the TX ON position accomplishes this.
For RS-485 operation the middle DIP switch is placed in the TX SD position. In this
position the transmitter is only enabled when data is being sent. The transmitter is tristated when not sending data, allowing other transmitters on the communications line to
transmit without interference.
DIP Switch 3 (RS-232/422/485 ports)
The bottom DIP switch (3) configures the port for half-duplex (two-wire) RS-485
operation or full-duplex (four wire) RS-422/RS-485 operation. Placing the bottom DIP
switch in the RX ON position configures the port for four wire operation. In this mode the
receiver is continuously enabled, allowing it to receive all data on the communications
line. Since the transmitter sends data on the other wire pair the port does not receive its
own transmissions.
Placing the bottom DIP switch in the RX position configures the port for two wire
operation. In this mode the transmitter and receiver are connected to the same wire
pair. The receiver is disabled when its transmitter is sending, preventing the port from
receiving its own data.
Setting the DIP Switches on RS-422/485 Only Ports
The 3PCIOU4 MIport card provides a combination of RS-232/422/485 and RS-422/485
only ports. Ports that do not include RS-232 operation use double DIP switches rather
than triple DIP switches. These DIP switches operate the same as the two bottom DIP
switches in the RS232/422/485 ports.
Figure 6. RS-422/485 only DIP Switch Settings
8 Chapter 2 Document Number 3PCI-0712m
Serial Card Setup
DIP Switch 1 (RS-422/485 only)
The top DIP switch (1) configures the port for RS-485 or RS-422 operation. For RS-422
operation (which uses two wire pairs and sends point-to-point or point-to-multipoints)
the transmitter can be enabled all the time. Placing the middle DIP switch in the TX ON
position accomplishes this.
For RS-485 operation the middle DIP switch is placed in the TX SD position. In this
position the transmitter is only enabled when data is being sent. The transmitter is tristated when not sending data, allowing other transmitters on the communications line to
transmit without interference.
DIP Switch 2 (RS-422/485 only)
The bottom DIP switch (2) configures the port for half-duplex (two-wire) RS-485
operation or full-duplex (four wire) RS-422/RS-485 operation. Placing the bottom DIP
switch in the RX ON position configures the port for four wire operation. In this mode the
port‘s receiver is continuously enabled, allowing it to receive all data on the
communications line. Since the port‘s transmitter sends data on the other wire pair the
port does not receive its own transmissions.
Placing the bottom DIP switch in the RX position configures the port for two wire
operation. In this mode the port‘s transmitter and receiver are connected to the same
wire pair. The receiver is disabled when its transmitter is sending, preventing the port
from receiving its own data.
Document Number 3PCI-0712m Chapter 2 9
Serial Card Setup
CAUTION:
This is an Electrostatic Sensitive Device. Use ESD precautions for
safe handling.
Before removing the card from the anti-static protective packaging:
Discharge any static electricity buildup on your body by touching a large
grounded metal surface or the metal chassis on equipment connected to
earth ground by a 3-wire power cord. Use of a grounding wrist strap is
recommended.
Avoid touching the gold connectors or other parts on the card except
when necessary to set the configuration DIP switches.
Remove AC power from the computer before inserting the card
Installing the Serial Card
1. Shut down your computer.
2. Unplug the power cord to remove power to prevent accidentally turning on
the computer during installation.
3. Remove the cover of the computer.
4. Locate an empty PCI expansion slot.
5. Remove the expansion slot cover. Save the retaining screw.
6. Ground yourself to the computer chassis before and while inserting the card.
7. Install the card into the unused slot. Be certain that the card is inserted
completely (fully seated) in the slot.
8. Secure the card with the mounting screw from Step 5.
9. Replace the cover; plug in the power cord.
10. Connect your cables.
11. Power up the system.
12. Install the drivers as described in Chapter 3.
Windows 7 does not have a ―Found New Hardware Wizard.‖ Therefore the MIPort
Driver must be installed manually.
1. Install the MIPort Card and place the CD in the CD ROM Drive
2. Open Device Manager
3. PCI Serial Port will be listed under ―Other Devices.‖
4. Select PCI Serial Port, right click, and select ―Update Driver.‖
5. Select ―brows my computer‖ and locate the drivers on the CD ROM.
6. A windows security notice will be displayed. Select ―install.‖ This notice will be displayed again. Select ―install.‖
7. ―Windows successfully updated driver software‖ will be displayed. Select
close.
8. In device manager, the MIPort Card will be listed under Multiport Serial
Adapter. Additional COM Ports will be listed under ―Ports (COM & LPT).‖
Installing Windows XP Driver Software
Installation of the MIport driver software on Windows XP is a three-step process:
1. Windows XP searches and identifies new hardware that has been installed.
2. You use the Found New Hardware Wizard to install the driver software for the
card.
3. You use the Found New Hardware Wizard to install the software for each port
on the card.
There are several possible methods for installing the software. The procedure outlined
here is recommended for most situations.
Note: If at some point in the future, you want to update these drivers,
remove the old drivers before installing the new version. Refer to
Chapter 6 for driver removal procedures.
Document Number 3PCI-0712m Chapter 3 11
Driver Software Installation
Pre-Installation Steps
1. Configure the port(s) on the card for the desired mode (RS-232, RS-422 or
RS-485) using the three DIP switches on the card.
2. If configuring for RS-422 or RS-485 Modes, and bias or termination resistors
are needed, add them at this time.
Note: Refer to Chapter 2 of information on DIP switch settings and
bias/termination resistors.
3. Install the card in the slot. Use appropriate ESD handling precautions.
4. Power up the computer
5. Insert your driver disc in the CD-ROM drive.
Using the Found New Hardware Wizard
Windows will detect the PCI card and start the Found New Hardware Wizard to begin
the driver installation. Driver software (on CD-ROM) is provided with your MIport card.
Do not connect to Windows Update to search for software.
6. Select No, not at this time and click Next.
PCI Card Software Installation
Once the new hardware has been detected, the wizard will proceed to install
the software for the card. The following dialog box will appear:
7. To begin the installation of the software for the PCI card, click Install the software automatically. Click Next.
Windows will find the appropriate files on the CD, then display a dialog box
concerning Window Logo testing for Vista. This feature of Vista simply
indicates that these drivers have not yet undergone the Microsoft testing
procedure required to use the Windows Vista Logo on the packaging. Diver
compatibility is not affected.
8. Click Continue Anyway.
A dialog box will appear indicating the software installation is proceeding.
9. When the Completing the Found New Hardware Wizard dialog appears,
click Finish.
Port Driver Installation
The Welcome to the Found New Hardware Wizard will appear again, indicating it has
detected a port on the PCI card. Repeat the steps above to install the port driver
software.
If the cared you are installing has more than one port, Windows Vista will find each port
in sequence and re-launch the Found New Hardware Wizard for each port. Repeat the
previous steps for each port.
Checking the Driver Installation
12 Chapter 3 Document Number 3PCI-0712m
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