AeroComm Network Card CL4490 1000 User Manual

CL4490-1000  
Industrial 900MHz ConnexLink  
User’s Manual  
Version 1.4  
11160 THOMPSON AVE  
LENEXA, KS 66219  
(800) 492-2320  
 
 
FCC Information  
FCC Notice  
WARNING: This device complies with Part 15 of the FCC Rules. Operation is subject to  
the following two conditions: (1) This device may not cause harmful  
interference and (2) This device must accept any interference received,  
including interference that may cause undesired operation.  
RF Exposure/Installation Instructions  
WARNING: To satisfy FCC RF exposure requirements for mobile transmitting devices,  
this equipment must be professionally installed such that the end user is  
prevented from replacing the antenna with a non-approved antenna. The  
end user should also be prevented from being within 20cm of the antenna  
during normal use with the exception of hands, feet, wrists and ankles.  
The preceding statement must be included as a CAUTION statement in  
manuals for OEM products to alert users on FCC RF Exposure compliance.  
Caution: Any change or modification not expressly approved by  
AeroComm could void the user’s authority to operate the equipment.  
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Table of Contents  
Figures  
Tables  
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CL4490 User’s Manual  
1. CL4490 RF Transceiver  
The CL4490 transceiver is a Frequency-Hopping Spread Spectrum (FHSS) radio designed for  
license-free operation in the 900MHz ISM band. Out-of-the box, the radio sustains a standard  
asynchronous serial data stream between two or more radios. Housed in a compact and rugged  
die-cast enclosure, the radio is equipped to replace thousands of meters of serial cable with its  
wireless link. The radio features an RS-232 or RS-485 interface for integration into legacy data  
systems.  
Features  
9
9
9
9
Durable Industrial grade enclosure  
Transparent operation, supports any legacy system  
Transmits around corners, through walls  
Reliable communication up to 115.2Kbps  
1.1  
Overview  
The CL4490 uses Frequency Hopping Spread Spectrum modulation, where the units “hop” from  
frequency to frequency many times per second using a specific hop pattern applied to all the  
transceivers in the same network. A distinct hopping pattern is provided for each Channel  
Number, thereby allowing multiple networks to co-exist in the same area without interference.  
CL4490 transceivers operate in a Point-to-Point or Point-to-Multipoint, Client-Server or Peer-to-  
Peer architecture. One transceiver is configured as a Server and there can be one or many  
Clients. To establish synchronization between transceivers, the Server emits a beacon. Upon  
detecting a beacon, a Client transceiver informs its Host and a RF link is established.  
CL4490s implement a proprietary communication protocol to provide secure data transmissions.  
As it uses FHSS technology, the data remains reliable over long distances. Use of license free  
frequency bands ensure that the units are ready to use with no further certification requirements.  
Each unit is small and easily portable for use in mobile and temporary settings as well as for fixed  
installations. The CL4490 configuration software enables custom configurations based on unique  
application requirements.  
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CL4490 User’s Manual  
1.2  
CL4490 Specification  
Specifications  
CL4490 - 1000  
TRANSCEIVER PERFORMANCE  
Output power  
1000mW  
Transmission range  
Data rate  
Up to 1500 feet (450m) indoors; Up to 20 miles (32 km) line-of-sight  
Up to 115.2 Kbps  
RF Data Rate  
76.8kbps fixed  
Receiver Sensitivity  
Power Consumption (@ 12 Vdc)  
Configuration software  
NETWORKING AND SECURITY  
Frequency band, RF Technology  
Supported Network Topologies  
Channels  
-100dBm typical @ 76.8kbps RF Data Rate  
400mA  
Easy-to-use Windows based software  
902 – 928, FHSS (USA); 915-928, FHSS (Australia)  
Point-to-Point, Point-to-Multipoint  
32  
Security  
One byte System ID. 56-bit DES encryption key.  
ANTENNA  
RF Connector  
RPSMA Jack  
Type  
1/2 Wave Dipole  
ELECTRICAL  
Electrical requirements  
Power supply  
Line voltage 100 – 120V (240V outside US);  
6-foot cable, AC power connector  
ENVIRONMENTAL  
Environmental conditions  
PHYSICAL  
Operating temperature -40° to +80°C; 10% to 90% humidity (non-condensing)  
Dimensions  
4.4 x 2.7 x 1.4 inches  
Weight  
6 oz (170 g)  
Serial Connector  
Serial Cord length  
DB-9 Male (RS-232), Terminal Block (RS-485)  
6 feet (183 cm)  
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CL4490 User’s Manual  
1.3  
CL4490 Interface  
The CL4490 supports RS-232/RS-485 (2-wire Half Duplex) protocols. By definition, RS-485  
protocol can tolerate high noise and push signals over long cable lengths. When using cables,  
RS-485 will communicate as far as 4000feet (1200m) and offer multi-drop capability where up to  
32 nodes may be connected. RS-232 cables are suitable for distances less than 100 feet  
(30.5m). AeroComm wireless solutions are not subject to the cabling restrictions for distance, but  
either interface (RS-232 or RS-485) is available when ordering the CL4490s.  
Figure 1- RS-232/RS-485 CL4490 Front View  
Status LEDs  
RPSMA Antenna Connector  
Pwr Link Rx Tx  
CL4490 Status LEDs  
Description  
LED  
Color  
Pwr  
Green  
On indicates that the unit is powered up.  
On indicates the Client unit(s) and Server unit are in range of one  
another. Link LED remains activated on Server units. Client units  
activate the Link LED when in range of the Server unit.  
Link  
Red  
Rx  
Tx  
Green  
Red  
When flashing, LED indicates CL4490 unit is receiving data.  
When and flashing, LED indicates CL4490 unit is sending data.  
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CL4490 User’s Manual  
RS-232 Pin Assignments  
Figure 2- RS-232 CL4490 Back View  
DB9 Male Connector  
Power Connector  
Pin Description  
NC  
2
3
4
5
6
7
8
NC  
DCD  
TxD  
RxD  
DSR  
GND  
DTR  
CTS  
RTS  
RI  
1
5
6
9
RS-485 (2-wire Half Duplex) Terminal Block Pin Assignments  
Figure 3- RS-485 CL4490 Back View  
Terminal Block  
Power Connector  
Pin  
Description  
1
VCC (6V-18V)(1.3 A  
2 485- (485B)  
3 No Connect  
4 No Connect  
5 485+ (485A)  
6 GND  
1
6
Note: Standard power is applied through the power connector. Alternative power is available via  
the terminal block pins.  
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CL4490 User’s Manual  
CL4490 Mechanical Diagram  
Figure 4- CL4490 Mechanical Diagram  
1.170  
0.536  
Antenna Connector  
SMA Jack, Reverse Polarity  
0.538  
0.060  
0.000  
Side View  
Label Recess, 3.5w x 2.0h  
0.150 dia. mounting holes  
(4) places  
2.750  
2.375  
2.000  
9 Pin Male D-Connector  
Status LEDs  
Power Jack w/ 0.100 dia. pin and  
0.250 opening, pin is PWR.  
0.375  
0.000  
Top View  
Note: All dimension in inches unless noted  
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CL4490 User’s Manual  
2. Interfacing Protocol  
The CL4490 is a DCE (Data Communications Equipment). A DCE can be interfaced to a DTE  
using a straight through serial cable (the serial cable provided with the CL4490 is a straight  
through cable). Typically, PC’s are defined as a DTE and peripherals are defined as DCE. To  
interface a DCE with another DCE, or a DTE with another DTE, a null modem (or a Crossover)  
cable is required. The null modem simply swaps pins to convert a DCE to a DTE and vice-versa.  
A null modem cable can be provided with the CL4490 on request.  
The CL4490 transceivers support the following interface protocols  
RS-232  
RS-485 (2-wire) Half Duplex  
Table 1 – DTE, DCE and Null Modem Signal Definitions  
DCE Pin DCE Signal DCE DTE Pin DTE Signal  
DTE  
Direction  
Null  
Modem  
Female  
DB9  
Null Modem  
Male DB9  
Number  
Name  
Direction Number  
Name  
1
2
3
4
5
6
7
8
9
DCD  
TXD  
RXD  
DTR  
GND  
DSR  
RTS  
CTS  
RI  
O
O
I
1
2
3
4
5
6
7
8
9
DCD  
RXD  
TXD  
DTR  
GND  
DSR  
RTS  
CTS  
RI  
I
1
2
3
4
5
6
7
8
9
NC  
3
I
O
O
2
I
6
5
O
I
I
O
I
4
8
O
O
7
I
NC  
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CL4490 User’s Manual  
1.4  
RS-232  
RS-232 is a single ended data transmission protocol. The RS-232 signals are represented by  
voltage levels with respect to a system common (power / logic ground). The "idle" state (MARK)  
has the signal level negative with respect to common, and the "active" state (SPACE) has the  
signal level positive with respect to common. RS-232 has numerous handshaking lines (primarily  
used with modems), and also specifies a communications protocol.  
Figure 5- RS-232 Male/Female Connector Pin out  
RS-232 DB9 Female Connector  
Pin Description  
RS-232 DB9 Male Connector  
Pin Description  
NC  
2
3
4
5
6
7
8
NC  
DCD  
TxD  
RxD  
DSR  
GND  
DTR  
CTS  
RTS  
RI  
1
2
3
4
5
6
7
8
9
DCD  
RxD  
TxD  
DTR  
GND  
DSR  
RTS  
CTS  
RI  
Figure 6- DCE to DTE Interface  
CL4490 Modem  
OEM Host/PC  
CTS  
RTS  
CTS  
RTS  
RXD  
TXD  
TXD  
RXD  
GND  
GND  
DCD  
DCD  
DSR  
DSR  
DTR  
DTR  
DCE  
DTE  
Straight Through Cable  
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CL4490 User’s Manual  
Figure 7- DCE to DCE Interface  
CL4490 Modem  
OEM Host  
CTS  
CTS  
RTS  
RTS  
RXD  
TXD  
TXD  
RXD  
GND  
DCD  
GND  
DCD  
DSR  
NC  
NC  
NC  
NC  
DSR  
DTR  
DTR  
RI  
RI  
DCE  
DCE  
Crossover Cable  
Note: The Straight Through Cable provided with the CL4490 has female connectors on both ends  
and the Crossover cable has a male connector at one end and a female connector at the other  
end. Please use a male-to-male adapter or female-to-female adapter wherever required. Using  
a null modem adapter with a Crossover cable is equivalent to using a Straight Through cable.  
1.5  
RS-485 (2-wire Half Duplex)  
The RS-485 interface uses a Differential Data Transmission that can help nullify the effects of  
ground shifts and induced noise signals that can appear as common mode voltages on a  
network.  
The CL4490 implements a RS-485 (2-wire Half Duplex) multi-drop interface. Typically, a RS-485  
bus will consist of a master and several slaves. The nodes will have unique addresses and can  
send addressed packets to specific nodes. Because the bus is half duplex, no two nodes should  
try to talk at the same time. The CL4490 does not have a RS-485 address, therefore, it will  
transmit all RS-485 traffic over the RF. Conversely, as soon as a CL4490 receives a packet over  
the RF, it will transmit the packet over the RS-485 bus.  
Note: When using RS-485 (2-wire Half Duplex), a RS-485 to RS-232 converter is required to  
configure the unit. AeroComm recommends a B&B Electronics 4WSD9R converter to translate  
RS-485 to RS-232.  
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CL4490 User’s Manual  
1.6 Hardware Flow Control  
Flow control refers to the control of data flow between the host and the CL4490. It is the  
method used to handle data in the transmit/receive buffer of the CL4490 interface, and  
determines how data flow between the host and the CL4490 is throttled. Often in serial  
communication, one device is capable of sending data much faster than the other can  
receive. Flow control allows the slower device to tell the faster device to pause and resume  
data transmission. (Flow control CTS and RTS are used by the CL4490 and its Host, locally  
– NOT over the air. Therefore, one CL4490 cannot tell the other to slow down or speed up  
as is mentioned above in the paragraph.)  
When the RTS Enable option is selected on the Configuration Utility, the transceivers use  
hardware flow control to regulate data flow. While using hardware flow control, the  
transceiver that is ready to receive data sends a Clear To Send signal to its host (or the  
device it is connected to). On the other hand, when a transceiver has something it wants to  
send to its host, it checks the state of Ready To Send and if it is logic low, will send data to its  
host. If RTS is logic high, it will not send data to its host. These signals are sent apart from  
the data itself on separate wires. Note: CTS is always enabled by default. RS-485  
Interface does not support Hardware flow control.  
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CL4490 User’s Manual  
3. Network Topologies  
Topology refers to the shape of a network, or the network's layout. How different nodes in a  
network are connected to each other and how they communicate, is determined by the network's  
topology. The CL4490s support a Point-to-Point and a Point-to-Multipoint network topology.  
3.1 Point-to-Point  
A point-to-point system is a simple arrangement consisting of just two CL4490s - a Server and a  
Client. Sometimes referred to as a wireless bridge, a point-to-point link replaces a single  
communications cable. A point-to-point link might be used to connect a PLC to a remote  
monitoring station.  
Figure 8- Point-to-Point Network  
OEM HOST  
(Remote Monitoring  
Station)  
OEM HOST  
(PLC)  
Server  
Client  
3.2 Point-to-Multipoint  
Point-to-Multipoint systems have one base station, or access point, that controls communications  
with all of the other wireless nodes in the network. This allows for the creation of a wireless  
network consisting of multiple nodes. By programming each CL4490 with a network specific  
Channel Number and System ID multiple networks can be created see (Fig 9).  
Figure 9- Multiple Networks of Point-to-Multipoint CL4490s  
Example: Channel Number = 25  
System ID = 256  
Example: Channel Number = 13  
System ID = 123  
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CL4490 User’s Manual  
4. CL4490/CN4490 Configuration Utility Software  
AeroComm provides the easy to use CL4490/CN4490 Utility Software for programming the  
CL4490/CN4490. The GUI based software does not require any hardware configuration and  
works by itself. The software is compatible with Microsoft® Windows 95, 98, 2000, Me, NT and  
XP. CL4490/CN4490s are plug-and-play devices that work with minimal or no configuration.  
However, users may refer to the AC4490 manual for details about the radio’s operation and  
advanced configuration commands. The SDK Software can be used to evaluate the advanced  
configuration commands. The SDK Software and AC4490 manual can be found on the Connex  
Tools and Literature CD or on our website at http://www.aerocomm.com/.  
Note: The users should refer to the ConnexNet manual for details about the CN4490  
interface.  
4.1 Installation  
1. Locate the CL4490 Configuration Utility, 900 MHz link in the Software section on the  
Connex Tools & Literature CD. This software is also available at  
2. When prompted, accept the default directory or change to the desired directory where the  
program files will be installed.  
3. When finished, a window will be displayed indicating a successful installation. Select OK.  
4.2 CL4490/CN4490 Settings  
The configuration utility can be used to configure both CL4490 and CN4490. The configuration  
utility defaults to CL4490 configuration when it is loaded; it can be used to configure the CN4490  
by checking the CN4490 check box on the configuration page.  
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CL4490 User’s Manual  
4.2.1 CL4490 Settings  
The CL4490 Settings Page is shown below, as it will appear the first time the  
program is run.  
4.2.1.1 ConnexLink Settings  
Client/Server: Designates CL4490 type. In each network, there must be only one Server.  
All other CL4490 units must be programmed as Clients. The number of Clients in the  
network is not limited; however, if performance diminishes, consider additional RF Networks.  
Interface Baud Rate: This defines the baud rate used for communicating with the CL4490  
over the serial interface. The RF baud rate is fixed at 76.8 Kbps and is independent of the  
Interface Baud Rate. The default baud rate setting is 57600 bps unless the units have been  
pre-configured by AeroComm. The Interface Baud Rate setting of the CL4490 must  
match the Baud Rate setting of its host device.  
Channel Number: A number that designates an independent network of CL4490 units. Up  
to 32 independent networks can be created. The valid range of values for this field is 16 to  
47.  
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Max Transmit Retries (For Clients and Servers in Point-to-Point networks only): This  
value represents the maximum number of times a particular data packet will be transmitted  
unsuccessfully, or without an acknowledgement, before the CL4490 discards the packet.  
The default value is 16 attempts. If communication is lost and the Client’s Link LED is on, try  
increasing this value in small increments until communication is reestablished.  
Note: This value is always associated to Client radios and Server radios in Point to Point  
Mode. The valid range of values for this field is 2 to 255.  
Broadcast Attempts (For Servers in Point-to-Multipoint networks only): This value  
represents the number of times a data packet will be transmitted by the Server CL4490. The  
default value is 4 attempts. If communication is lost and the Clients’ Link LED is on, try  
increasing this value in small increments until communication is reestablished. The valid  
range of values for this field is 2 to 255  
System Identification: A number from 0 to 256 that provides added security to each  
independent network of CL4490 units. The System ID is used in conjunction with the  
Channel Number and serves as an RF password to maintain secure transfers of data. The  
combination of the Channel Number and System ID must be unique to each network of  
CL4490s to establish communication. Multiple Servers in the same coverage area must be  
programmed with different Channel Numbers to prevent inoperability of the networks. The  
System ID will not prevent inoperability that occurs from locating multiple Servers with the  
same Channel Number in the same coverage area.  
Important Note: Separate Collocated CL4490 networks must operate on different  
Channel Numbers. All units in a given CL4490 network must have identical Channel  
Numbers and System IDs.  
Data Encryption Key: Encryption is the process of encoding an information bit stream to  
secure the data content. The DES algorithm is a common, simple and well-established  
encryption routine. An encryption key of 56 bits is used to encrypt the packet. The receiver  
must use the exact same key to decrypt the packet; otherwise garbled data will be produced.  
Destination Address: The MAC Address of the remote CL4490 in a Point-to-Point network.  
Used to optimize Point-to-Point communications by utilizing RF Acknowledgement.  
Firmware Version: Displays the CL4490’s firmware version.  
MAC Address: A unique 6 Byte, IEEE 802.3 Ethernet address assigned by AeroComm to  
each CL4490.  
4.1.1.2 Optional Settings  
Data Encryption: Enables the Data Encryption Key. All CL4490s in the same network must  
have the same encryption setting.  
RTS Enable: Enables the Request To Send control line. When enabled, enables Hardware  
Flow Control. Refer to Section 2.3 Hardware Flow Control.  
Parity: Needs to be enabled if host requires even or odd parity and 8 data bits. This is  
considered as 9-bit mode. Note: Enabling Parity cuts the overall throughput into half.  
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Full Duplex: This mode restricts Client radios to transmitting on odd numbered frequency  
hop bins and the Server to even numbered frequency hop bins. Though the RF hardware is  
still technically half duplex, it makes the transceiver seem full duplex. This can cause overall  
throughputs to be cut in half. Note: All transceivers on the same network must have the  
same setting for Full Duplex.  
Modem Mode: Full modem handshaking is supported by the transceivers when Modem  
Mode is enabled. Modem Mode is incompatible with RS-485Interface. Enables DCD, DTR,  
DSR and Ring Indicator control lines.  
4.1.1.3 PC Settings  
Port: Serial communications port of the PC connected to the CL4490 unit.  
Baud Rate: Must equal the Interface Baud Rate setting of the CL4490 unit that is about to  
be programmed.  
System Config: Type of CL4490 network to be configured. Valid choices are Point-to-  
Point (one Server and one Client) or Point-to-Multipoint (one Server and multiple Clients).  
Attention: When setting up a Point-to-Point network the Server’s Destination address  
must be set to the Client’s MAC Address.  
4.1.1.4 Programming the CL4490 units  
1. Connect a CL4490 unit to the serial communications port on the PC.  
2. Connect the power supply to the CL4490 unit. Make sure the Pwr LED is on.  
3. Start the CL4490 Configuration Utility.  
4. Select the COM Port that is connected to the CL4490 unit on the PC Settings section.  
5. Select the Interface Baud Rate of the CL4490 unit. All CL4490 units are shipped with a  
default rate of 57600 (unless units have been pre-configured to match specific serial  
settings). If the Interface Baud Rate of the CL4490 unit is changed as described in  
Section 4.2 Changing CL4490 Settings, then PC Setting Baud Rate must be set to the  
same Baud Rate to allow proper programming of the units.  
6. Select the System Configuration for the CL4490 network, Point-to-Point (one Server and  
one Client) or Point-to-Multipoint (one Server and multiple Clients).  
7. Select Read Radio to display the current settings of the CL4490 unit.  
8. Change desired settings.  
9. After all changes have been made, select Write Radio to save the changes.  
10. Cycle Power to the unit after all changes has been saved. This will set the CL4490 unit  
to its normal mode of operation.  
Note: The Show Defaults button can be used to display the default Radio settings.  
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4.2.2 CN4490 Settings  
The CN4490 Settings Page is shown below, as it will appear the first time when the CN4490  
check box is checked.  
4.2.2.1 CN4490 Settings  
Client/Server: Designates CN4490 type. In each network, there must be only one Server. All  
other CN4490 units must be programmed as Clients. The number of Clients in the network is not  
limited; however, if performance diminishes, consider additional RF Networks.  
Channel Number: A number that designates an independent network of CN4490 units. Up to  
32 independent networks can be created. The valid range of values for this field is 16 to 47.  
Max Transmit Retries (For Clients and Servers in Point-to-Point networks only): This value  
represents the maximum number of times a particular data packet will be transmitted  
unsuccessfully, or without an acknowledgement, before the CN4490 discards the packet. The  
default value is 16 attempts. If communication is lost and the Client’s Link LED is on, try  
increasing this value in small increments until communication is reestablished.  
Note: This value is always associated to Client radios and Server radios in Point to Point Mode.  
The valid range of values for this field is 2 to 255.  
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Broadcast Attempts (For Servers in Point-to-Multipoint networks only): This value  
represents the number of times a data packet will be transmitted by the Server ConnexLink. The  
default value is 4 attempts. If communication is lost and the Clients’ Link LED is on, try  
increasing this value in small increments until communication is reestablished. The valid range of  
values for this field is 2 to 255.  
System Identification: A number from 0 to 256 that provides added security to each  
independent network of CN4490 units. The System ID is used in conjunction with the Channel  
Number and serves as an RF password to maintain secure transfers of data. The combination of  
the Channel Number and System ID must be unique to each network of CN4490 to establish  
communication. Multiple Servers in the same coverage area must be programmed with different  
Channel Numbers to prevent inoperability of the networks. The System ID will not prevent  
inoperability that occurs from locating multiple Servers with the same Channel Number in the  
same coverage area.  
Important Note: Separate Collocated CN4490 networks must operate on different Channel  
Numbers. All units in a given CN4490 network must have identical Channel Numbers and  
System IDs.  
Data Encryption Key: Encryption is the process of encoding an information bit stream to secure  
the data content. The DES algorithm is a common, simple and well-established encryption  
routine. An encryption key of 56 bits is used to encrypt the packet. The receiver must use the  
exact same key to decrypt the packet; otherwise garbled data will be produced.  
Destination Address: The MAC Address of the remote CN4490 in a Point-to-Point network.  
Used to optimize Point-to-Point communications by utilizing RF Acknowledgement.  
Firmware Version: Displays the CN4490’s firmware version.  
RF Delivery: Displays the CN4490 RF delivery mode. RF delivery mode is broadcast if the  
System Config is set to point to multipoint, is addressed otherwise.  
MAC Address: A unique 6 Byte, IEEE 802.3 Ethernet address assigned by AeroComm to each  
CN4490.  
4.2.2.2 Optional Settings  
Data Encryption: Enables the Data Encryption Key. All CN4490s in the same network must  
have the same encryption setting.  
Parity: Needs to be enabled if host requires even or odd parity and 8 data bits. This is  
considered as 9-bit mode. Note: Enabling Parity cuts the overall throughput into half.  
Full Duplex: This mode restricts Client radios to transmitting on odd numbered frequency hop  
bins and the Server to even numbered frequency hop bins. Though the RF hardware is still  
technically half duplex, it makes the transceiver seem full duplex. This can cause overall  
throughputs to be cut in half. Note: All transceivers on the same network must have the  
same setting for Full Duplex.  
Modem Mode: Needs to be enabled if Email Alerts need to be generated refer to section 7.4  
Email Alerts for details.  
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4.2.2.3 PC Settings  
IP Address: IP Address of the CN4490 unit.  
Port: Port number of the CN4490 unit, the Port number is always 2101.  
System Config: Type of CN4490 network to be configured. Valid choices are Point-to-Point  
(one Server and one Client) or Point-to-Multipoint (one Server and multiple Clients).  
Attention: When setting up a Point-to-Point network the Server’s Destination address must  
be set to the Client’s MAC Address.  
4.2.2.4 Programming the CN4490 units  
1. Connect the CN4490 unit to the network.  
2. Connect the power supply to the CN4490 unit. Make sure the Pwr LED is on.  
3. Start the CN4490 Configuration Utility.  
4. Select TCP/IP Select on the PC Settings Frame.  
5. Enter the IP Address of the CN4490 that needs to be configured.  
6. Select the System Configuration for the CN4490 network, Point-to-Point (one Server  
and one Client) or Point-to-Multipoint (one Server and multiple Clients).  
7. Select Read Radio to display the current settings of the CN4490 unit.  
8. Change desired settings.  
9. After all changes have been made, select Write Radio to save the changes.  
Note: The Show Defaults button can be used to display the default Radio settings.  
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CL4490 User’s Manual  
5. Troubleshooting  
Solution  
Problem  
CL4490  
CN4490  
Read Radio  
displays error  
message:  
1. Make sure the PC Settings are right. See Section 1. Make sure the PC Settings are right. See  
4.2.3 PC Settings.  
Section 7.2.3 PC Settings.  
“Radio not  
responding.”  
2. Make sure the CL4490 unit uses the right serial  
2. Make sure the CN4490 unit uses the right  
Ethernet cable. Refer to Section 2.2 LAN Port.  
cable. Refer to Section 2.1 RS-232.  
3. If any other program that is using the same COM 3. If any other program that is using the same  
port as CL4490 is open, close that program and  
try to read the radio again.  
LAN port as CN4490 is open, close that  
program and try to read the radio again.  
4. Reset the radio by cycling power after each  
unsuccessful Read.  
4. Reset the radio by cycling power after each  
unsuccessful Read.  
Write Radio  
displays error  
message:  
“Radio not  
responding.”  
1.  
2.  
Cycle power to the radio.  
1. Cycle power to the radio.  
Read the radio and make desired changes and  
then Write the radio.  
2. Read the radio and make desired changes  
and then Write the radio.  
Garbled Data  
1. Check Data Encryption Standard settings.  
1. Check Data Encryption Standard settings.  
received.  
Client’s Link  
LED does not  
come on.  
1. Make sure the unit is connected to power.  
2. Cycle power to the radio.  
1. Make sure Server CN4490 unit is  
powered up.  
2. Cycle power to the radio.  
Link LED is  
on, but data  
does not get  
transmitted or  
received.  
1. Make sure the CL4490 unit(s) is connected to the 1. Make sure the CN4490 unit(s) IP Address  
correct COM Port.  
is right.  
2. Check the COM port settings for correct Baud  
Rate, Parity and either Hardware or No Flow  
Control. Units can have transmission errors  
with Flow Control set to Xon/Xoff.  
2. Try increasing the Maximum Transmit  
Attempts (for Clients) and/or Broadcast  
Attempts (for Servers) values in small  
increments until communication is established.  
3. Try increasing the Maximum Transmit  
Attempts (for Clients) and/or Broadcast  
Attempts (for Servers) values in small  
3. Check the Destination Address setting.  
increments until communication is established.  
4. Connect a Null Modem adapter between the  
Client and its host device.  
5. Check the Destination Address setting.  
If these troubleshooting tips do not resolve the problem, please call our toll free number at (800)  
492-2320, extension 228. Technical support hours are Monday through Friday, 8:00 am to 5:00  
pm Central Standard Time.  
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