Black BOX IC983C-R2 User Manual
USER MANUAL
IC983C-R2
PCI EXPRESS
CARD
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TABLE OF CONTENTS
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1. SPECIFICATIONS ...................................................................................................................................................................................... 3
2. OVERVIEW ................................................................................................................................................................................................. 4
2.1 Introduction .......................................................................................................................................................................................................... 4
2.2 Features ............................................................................................................................................................................................................... 4
2.3 What’s Included ................................................................................................................................................................................................... 4
2.4 Additional Items You May Need ......................................................................................................................................................................... 5
2.5 Hardware Description ......................................................................................................................................................................................... 6
3. CARD SE TUP ............................................................................................................................................................................................. 7
3.1 Address and IRQ Selection ................................................................................................................................................................................. 7
3.2 Clock Modes and Baud Rates ............................................................................................................................................................................ 7
3.3 Electrical Interface Selection via Hardware...................................................................................................................................................... 7
3.4 RS-485 Enable Modes ........................................................................................................................................................................................ 7
3.5 Line Termination Selection via Hardware ......................................................................................................................................................... 8
3.6 Electrical Interface, Line Termination, and Echo Selection via Software ....................................................................................................... 9
3.7 Slew Rate Limiting ............................................................................................................................................................................................. 10
3.8 RS-485 Auto-Enable Delay ............................................................................................................................................................................... 10
3.9 On-Board LED Signal Indicators ....................................................................................................................................................................... 10
4. SOFTWARE INSTALLATION .................................................................................................................................................................. 11
4.1 Where to Get the Software ................................................................................................................................................................................11
4.2 Windows Installation .........................................................................................................................................................................................11
4.3 Upgrading to the Current Driver ....................................................................................................................................................................... 12
4.4 Linux Support .................................................................................................................................................................................................... 12
5. HARDWARE INSTALLATION .................................................................................................................................................................. 13
5.1 Verifying Installation ......................................................................................................................................................................................... 13
5.2 Uninstall Instructions ........................................................................................................................................................................................ 13
5.3 Remove Hardware Using Device Manager ...................................................................................................................................................... 13
6. TECHNICAL DESCRIPTION ................................................................................................................................................................... 14
6.1 DB25 Male Connector Pin Assignments ......................................................................................................................................................... 14
6.2 DB9 Male Connector Pin Assignments ........................................................................................................................................................... 15
APPENDIX A: TROUBLESHOOTING .......................................................................................................................................................... 16
APPENDIX B: HANDLING INSTRUCTIONS .............................................................................................................................................. 21
APPENDIX C: ELECTRICAL INTERFACE ................................................................................................................................................... 22
C.1 RS-232 ................................................................................................................................................................................................................ 22
C.2 RS-422 ............................................................................................................................................................................................................... 22
C.3 RS-485 ............................................................................................................................................................................................................... 22
APPENDIX D. ASYNCHRONOUS COMMUNICATIONS ............................................................................................................................ 23
APPENDIX E. GROUND LOOP PHENOMENON ......................................................................................................................................... 24
E.1 What is Ground Loop? ....................................................................................................................................................................................... 24
E.2 Cabling Recommendations .............................................................................................................................................................................. 24
APPENDIX F. MECHANICAL DRAWING .................................................................................................................................................... 25
APPENDIX G. REGULATORY INFORMATION ........................................................................................................................................... 26
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CHAPTER 1: SPECIFICATIONS
TABLE 1-1. SPECIFICATIONS
SPECIFICATION DESCRIPTION
Connectors
Material Solder mask over bare copper or solder mask over tin nickel
MTBF 1,300,000 hours at 77° F (25° C) ambient
Temperature Tolerance
Relative Humidity
Rating 94V0
Power Consumption 3 W
Supply Voltage +3.3 VDC
Rating 300 mA
On PCI card: (1) DB25 male;
On 36" (91 cm) cable: (1) DB25 female, (2) DB9M
Operating: 32 to 158° F (0 to 70° C);
Storage: -58 to +221°F (-50 to 105° C)
Operating: 10 to 90%, noncondensing
Storage: 10 to 90%, noncondensing
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CHAPTER 2: OVERVIEW
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2.1 INTRODUCTION
The PCI Express Card - Async, RS-232/422/485, Serial 2-Port (IC983C-R2) is a PCI Express 2.0 Gen 1 compliant interface adapter
with two field-selectable RS-232/422/485 asynchronous serial ports supporting data rates exceeding 1 Mbps for industrial
automation and control applications.
Configure the serial ports as RS- 232 for standard serial COM port requirements. Choose the RS-422 mode for long-distance device
connections up to 4000 ft. (1250 m) where noise immunity and high data integrity are essential. Select RS-485 and capture data
from multiple peripherals in an RS 485 multi-drop network. Up to 31 RS-485 compliant devices can be connected to each port
to automate your data collection. You can even mix the ports in any of the electrical interface combinations to provide maximum
flexibility in your application.
Using Windows, in RS-485 mode the transmitter is automatically enabled in hardware, eliminating the need for application software
control. This allows the IC983C-R2 to be used with standard serial communications applications and removes the risk
of bus contention and data corruption. In RS-232 mode, all modem control signals are implemented for maximum compatibility
with a wide range of serial peripherals. The driver for Windows software and utilities make installation and operation easy
in Windows 7/8.1/10.
sThe IC983C-R2 ships with a Low Profile PCIe bracket that will only work in a Low Profile PCIe slot. The product is RoHS compliant
and meets the requirements of the RoHS (2011/65/EU) directive.
2.2 FEATURES
Two serial ports configurable for RS-232/422/485.
On-board DIP switch configuration with Windows device driver override.
Ultra High-speed UART with 256-byte TX and RX FIFOs.
Asynchronous data rates exceed 1 Mbps.
Automatic RS-485 enable/disable for Windows applications.
Windows driver selectable 250K slew rate limiting minimizes electromagnetic interference.
Includes a 36” (91 cm) cable terminates with two DB9M connectors.
2.3 WHAT’S INCLUDED
The IC983C-R2 is shipped with the following items. If any of these items are missing or damaged, contact Black Box
Technical Support at 877-877-2269 or info@blackbox.com.
PCI Express Card - Async, RS-232/422/485, Serial 2-Port (IC983C-R2 )
(1) 36” (91 cm) DB25F to (2) DB9M Cable
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2.4 ADDITIONAL ITEMS YOU MAY NEED
Depending upon your application, you are likely to find one or more of the following items useful with the IC983C-R2. All items
can be purchased from Black Box.
DB9 to DB25 Serial Cable (part number BC03000-0006-MF): This cable is a standard AT-style RS-232 modem cable with a DB9 female
connector on one end and a DB25 male connector on the other end. Simply connect the DB9F connector to the DB9 serial port on your
computer
or host, and then connect the DB25M connector to your RS-232 serial modem or other compatible RS-232 serial device.
The 6-foot (1.8-m) cable is fully shielded with dual thumbscrews at each connector. The molded connectors integrate strain relief
to prevent damage to the cable or connectors. All DB9 modem control signals are implemented and the cable is pinned to EIA-232
standards.
DB9 Serial Extension Cable (part number BC00200): This cable is a standard DB9F to DB9M serial extension cable. Extend a DB9 cable
or locate a piece of hardware where it is needed with this 6-foot (72-inch) cable. The connectors are pinned one-to-one so the cable
is compatible with any device or cable with DB9 connectors. The cable is fully shielded against interference and the connectors are
molded to provide strain relief. Dual metal thumbscrews secure the cable connections and prevent accidental disconnection.
Terminal Block Kit (IC981): This terminal block kit breaks out a DB9 connector to 9 screw terminals to simplify field wiring
of serial connections. It is ideal for RS-422 and RS-485 networks, yet it will work with any DB9 serial connection, including RS-232.
The terminal block kit includes one DB9 terminal block (part number IC981) and one extension cable (part number BC00200).
The terminal block includes holes for board or panel mounting. The terminal block can connect directly to DB9 serial cards or any cable
with a DB9M connector.
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2.5 HARDWARE DESCRIPTION
Figure 2-1 shows the PCI Express Card - Async, RS-232/422/485, Serial 2-Port (IC983C-R2). Table 2-1 describes its components.
DIP
SWITCHES
DB25 MALE
CONNECTOR
DB25 FEMA LE
CONNECTOR
FIGURE 2-1. PCI EXPRESS CARD
DB9 MALE
CONNECTOR
DB9 MALE
CONNECTOR
TABLE 2-1. COMPONENTS IN FIGURE 1-1
COMPONENT DESCRIPTION
DB25 male serial connector on the adapter card Connects to DB25 female serial connector on the cable
DIP switch 1
DIP switch 2
NOTE: A DB25F to (2) DB9M cable (included) connects to the serial card’s DB25M connector via the cable’s DB25F connector and to (2)
serial devices via the cable’s (2) DB9M connectors.
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3.1 ADDRESS AND IRQ SELECTION
The IC983C-R2 is automatically assigned memory addresses and IRQs by your motherboard BIOS or by a “plug-n-play” operating
system. Adding or removing other hardware or moving the adapter to another slot may change the assignment of memory
addresses and IRQs.
3.2 CLOCK MODES AND BAUD RATES
The IC983C-R2 derives a 125-MHz clock from the PCI express link for the Baud Rate Generator (BRG) which is divided by a clock
prescaler (1 or 4) and a 16-bit clock divisor to obtain a sampling clock of 16X, 8X, or 4X the serial data rate. The BRG offers a wide
range of possible baud rates. Under Windows and Linux, the best choice of divisor is made automatically by the driver. The bit rate
error is within the +/– 2% recommended tolerance for proper serial communication.
3.3 ELECTRICAL INTERFACE SELECTION VIA HARDWARE
Each serial port on the IC983C-R2 has the ability to be used as RS-232, RS-422, or RS-485. Port 1 is selectable via DIP-switch SW2
configuration, and Port 2 is selectable via DIP-switch SW1 configuration. Use the following examples to configure your adapter.
TABLE 3-1. MODE SELECTION VIA HARDWARE (DIP SWITCHES)
M1 SWITCH M0 SWITCH MODE
Off Off RS-232
Off On RS-422 (default)
On Off RS-485 with echo
On On RS-485 without echo
3.4 RS-485 ENABLE MODES
RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state driver that will allow the electrical presence
of the driver to be removed from the line. The driver is in a tri-state or high-impedance condition when this occurs. Only one driver
may be active at a time and the other driver(s) must be tri-stated.
The RS-485 driver of each IC983C-R2 port enters and leaves tri-state together with the changes to its output modem control signal
Data Terminal Ready (DTR).
Under Windows, configuring an IC983C-R2 port to RS-485 configures the port to automatically assert its DTR output at the start
of each transmission. This causes the RS-485 data transmission driver to leave tri-state, allowing it to transmit signals. In RS-485
mode under Windows, the port is also set to automatically de-assert its DTR at the end of each transmission. This returns
the RS-485 data transmission driver to tri-state so that other drivers can transmit on the line.
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3.5 LINE TERMINATION SELECTION VIA HARDWARE
Typically, the device at each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive end only).
When the end device is a IC983C-R2 port, the board DIP switches can be used to connect a built in 120-ohm resistor between
each RS-422/485 input pair in addition to a 510-ohm pull-up/pull-down combination that biases the RX+ and RX– receiver inputs.
DIP switches SW2 (Port 1) and SW1 (Port 2) allow the user to customize each port individually to their specific requirements.
If multiple IC983C-R2 ports are configured in a RS-485 network, only the ports at each end should have switches T, PU, and PD ON.
If you are using the board in an RS-485 two-wire network, enable the two switches labeled “L,” which electrically connect the TX–
and RX– pins together and the TX+ and RX+ pins together.
TABLE 3-2. DIP SWITCH SETTINGS
SWITCH DEFAULT SELECTION IF ON
T On Enables RS-422/RS-485 120 ohm termination between RX+ and RX– and between CTS+ and CTS–
PU On Enables RS-422/RS-485 RX+ 510 ohm pull-up to 3.3V (biasing)
PD On Enables RS-422/RS-485RX– 510 ohm pull-down to GND (biasing)
L Off Enables RS-485 two-wire mode, connecting TX– to RX–
L Off Enables RS-485 two-wire mode, connecting TX+ to RX+
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3.6 ELECTRICAL INTERFACE, LINE TERMINATION, AND ECHO SELECTION VIA SOFTWARE
When an IC983C-R2 has been installed under Windows, the DIP switch configuration can be overridden by software settings
via the Port Settings tab in Device Manager. Changing one port to be overridden by software will automatically change the other port
to also be software overridden. The initial software override configuration of each port is adopted from its DIP switch configuration.
Both COM ports of the IC983C-R2 should be closed by applications when the software override option is changed in Port Settings.
FIGURE 3-1. PORT SE TTINGS SCREEN
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3.7 SLEW R AT E LIM ITI N G
Slew Rate Limiting (250 kbps) is an additional configuration setting available only via software selection. It helps minimize
the generation of electromagnetic interference in applications where higher baud rates are not required.
3.8 RS-485 AUTO-ENABLE DELAY
RS-485 Auto-Enable Delay is an additional configuration setting available only via software selection. It provides an ability
to select a 0 to 15 bit-time delay that is inserted after the end of the last stop-bit of the last transmitted character. This delay
controls when to automatically disable the RS-485 transmitter. This delay may be useful in long-cable networks.
3.9 ON-BOARD LED SIGNAL INDICATORS
TABLE 3-3. LED INDICATORS
DRIVER D1 D2 D3 D4
Loaded Heartbeat (1 sec on/off) M1 M0 T
Not Loaded Heartbeat Heartbeat Heartbeat Heartbeat
If the driver is not loaded, all four (4) LEDs flash with the heartbeat signal and the serial port remains in tri-state mode until the driver
loads.
If the driver is loaded, the LEDs reflect the current Port 1 mode and termination state in accordance with the table above, whether
the states have been set by DIP switch SW2 or software control.
M1 and M0 are lit if the DIP switch is OFF.
T is lit if the DIP switch is ON meaning termination is enabled.
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