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AeroComm CL4790 User Manual

Industrial 900mhz connexlink rf
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CL4790
Industrial 900MHz ConnexLink

User's Manual

Version 1.0
11160 THOMPSON AVENUE
LENEXA, KS 66215
(800) 492-2320
www.aerocomm.com
sales@aerocomm.com

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Summary of Contents for AeroComm CL4790

  • Page 1: User's Manual

    CL4790 Industrial 900MHz ConnexLink User’s Manual Version 1.0 11160 THOMPSON AVENUE LENEXA, KS 66215 (800) 492-2320 www.aerocomm.com sales@aerocomm.com...
  • Page 2 Document Information Copyright Copyright © 2004 A , Inc. All rights reserved. The information contained in this manual and the accompanying Information software programs are copyrighted and all rights are reserved by , Inc. A , Inc. reserves the right to make periodic modifications of this product without obligation to notify any person or entity of such revision.
  • Page 3 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. 6/24/2005...

  • Page 4: Table Of Contents

    5. TROUBLESHOOTING .................... 28 Figures Figure 1- RS-232/RS-485 CL4790 Front View.............. 7 Figure 2- RS-232 CL4790 Back View ................8 Figure 3- RS-485 CL4790 Back View ................8 Figure 4- CL4790 Mechanical Diagram................. 9 Figure 5- RS-232 Male/Female Connector Pin out ........... 11 Figure 6- DCE to DTE Interface..................

  • Page 5: Cl4790 Rf Transceiver

    Point-to-Point and Point-to-Multipoint setups Overview The CL4790 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.

  • Page 6: Cl4790 Specification

    CL4790 User’s Manual CL4790 Specification Specifications CL4790 - 1000 TRANSCEIVER PERFORMANCE Output power 1000mW Transmission range Up to 1500 feet (450m) indoors; Up to 20 miles (32 km) line-of-sight Data rate Up to 115.2 Kbps RF Data Rate 76.8kbps fixed Receiver Sensitivity -100dBm typical @ 76.8kbps RF Data Rate...

  • Page 7: Cl4790 Interface

    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 CL4790s.

  • Page 8: Figure 2- Rs-232 Cl4790 Back View

    CL4790 User’s Manual RS-232 Pin Assignments Figure 2- RS-232 CL4790 Back View DB9 Male Connector Power Connector Description RS-485 (2-wire Half Duplex) Terminal Block Pin Assignments Figure 3- RS-485 CL4790 Back View Terminal Block Power Connector Description 1 VCC (6V-18V)(1.3 A Required)

  • Page 9: Figure 4- Cl4790 Mechanical Diagram

    CL4790 User’s Manual CL4790 Mechanical Diagram Figure 4- CL4790 Mechanical Diagram 1.170 Antenna Connector SMA Jack, Reverse Polarity 0.538 0.536 0.060 0.000 Side View Label Recess, 3.5w x 2.0h 0.150 dia. mounting holes 2.750 (4) places 2.375 2.000 9 Pin Male D-Connector Status LEDs Power Jack w/ 0.100 dia.

  • Page 10: Interfacing Protocol

    CL4790 User’s Manual 2. Interfacing Protocol The CL4790 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 CL4790 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.

  • Page 11: Rs-232

    CL4790 User’s Manual 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.

  • Page 12: Rs-485 (2-Wire Half Duplex)

    Because the bus is half duplex, no two nodes should try to talk at the same time. The CL4790 does not have a RS-485 address, therefore, it will transmit all RS-485 traffic over the RF. Conversely, as soon as a CL4790 receives a packet over the RF, it will transmit the packet over the RS-485 bus.

  • Page 13: Hardware Flow Control

    CL4790 User’s Manual Hardware Flow Control Flow control refers to the control of data flow between the host and the CL4790. It is the method used to handle data in the transmit/receive buffer of the CL4790 interface, and determines how data flow between the host and the CL4790 is throttled. Often, in serial communication, one device is capable of sending data much faster than the other can receive.

  • Page 14: Network Topologies

    This allows for the creation of a wireless network consisting of multiple nodes. By programming each CL4790 with a network specific Channel Number and System ID multiple networks can be created see (Fig 9).

  • Page 15: Cl4790/Cn4790 Configuration Utility Software

    The configuration utility can be used to configure both CL4790 and CN4790. The configuration utility defaults to CL4790 configuration when it is loaded; it can be used to configure the CN4790 by checking the CN4790 check box on the configuration page.

  • Page 16: Cl4790 Settings

    CL4790 User’s Manual 4.2.1 CL4790 Settings The CL4790 Settings Page is shown below, as it will appear the first time the program is run. 4.2.1.1 ConnexLink Settings Interface Baud Rate: This defines the baud rate used for communicating with the CL4790 over the serial interface.
  • Page 17 CL4790 discards the packet. The default value is 4 attempts. If communication is lost and the Link LED is on, try increasing this value in small increments until communication is reestablished.
  • Page 18 CL4790 User’s Manual 4.2.1.3 Optional Settings Data Encryption: Enables the Data Encryption Key. All CL4790s 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.
  • Page 19 CL4790 User’s Manual Consider the example of a remote temperature monitoring system where temperature readings are obtained from sensors attached to the transceivers at remote locations. This application may require polling each and every transceiver individually and obtaining the temperature reading.
  • Page 20 Note: The API Mode over writes all the RF Delivery settings. 4.2.1.5 PC Settings Port: Serial communications port of the PC connected to the CL4790 unit. Baud Rate: Must equal the Interface Baud Rate setting of the CL4790 unit that is about to be programmed. 6/24/2005...
  • Page 21 7. Change desired settings. 8. After all changes have been made, select Write Radio to save the changes. 9. Cycle Power to the unit after all changes has been saved. This will set the CL4790 unit to its normal mode of operation.

  • Page 22: Cn4790 Settings

    CL4790 User’s Manual 4.2.2 CN4790 Settings The CN4790 Settings Page is shown below, as it will appear the first time the CN4790 check box is checked. 4.2.2.1 ConnexLink Settings Random Back Off: Random BackOff determines the random amount of time a transceiver waits when a collision occurs before resending the packet again.
  • Page 23 Destination Address: The MAC Address of the remote CN4790 in a Point-to-Point network. Used to optimize Point-to-Point communications by utilizing RF Acknowledgement. Firmware Version: Displays the CN4790’s firmware version. MAC Address: A unique 6 Byte, IEEE 802.3 Ethernet address assigned by AeroComm to each CN4790. 4.2.2.2 RF Delivery Broadcast: Enables Broadcast mode.
  • Page 24 CL4790 User’s Manual 4.2.2.3 Optional Settings Data Encryption: Enables the Data Encryption Key. All CN4790s 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.
  • Page 25 CL4790 User’s Manual Consider the example of a remote temperature monitoring system where temperature readings are obtained from sensors attached to the transceivers at remote locations. This application may require polling each and every transceiver individually and obtaining the temperature reading.
  • Page 26 CL4790 User’s Manual Consider a remote temperature monitoring system where the transceivers have to transmit their temperature reading periodically. When the Receive API is enabled every data packet received has also the information about the transceiver that transmitted the packet. This information is very useful in identifying the transceiver and analyzing its wireless link.
  • Page 27 CL4790 User’s Manual 4.2.2.6 Programming the CN4790 units 1. Connect a CN4790 unit to the serial communications port on the PC. 2. Connect the power supply to the CN4790 unit. Make sure the Pwr LED is on. 3. Start the CN4790 Configuration Utility.

  • Page 28: Troubleshooting

    4.2.3 PC Settings. Section 7.2.3 PC Settings. message: “Radio not responding.” Make sure the CL4790 unit uses the right serial 2. Make sure the CN4790 unit uses the cable. Refer to Section 2.1 RS-232. right Ethernet cable. Refer to Section 2.2 LAN Port.

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