Table of Contents
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Summary of Contents for Black Box MDR24x
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Page 1: User's Manual
MDR24x Wireless 2.4GHz Modem User’s Manual Version 1.1 1000 Park Drive – Lawrence, PA 15055-1018 Website: www.blackbox.com Email: info@blackbox.com Order Toll Free in the US: Call 877-877-BBOX (Outside the US call 724-746-5500) -
Page 2: Document Information
Document Information Copyright Copyright © 2005 B , Inc. All rights reserved. LACK The information contained in this manual and the accompanying Information software programs are copyrighted and all rights are reserved by , Inc. B , Inc. reserves the right to make LACK LACK periodic modifications of this product without obligation to notify... - 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 Black Box could void the user’s authority to operate the equipment.
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Page 4: Table Of Contents
TROUBLESHOOTING ..................19 Figures Figure 1- RS-232/RS-485 MDR24X Front View............7 Figure 2- RS-232 MDR24X Back View ................8 Figure 3- RS-485 MDR24X Back View ................8 Figure 4- MDR24X Mechanical Diagram ..............9 Figure 5- RS-232 Male/Female Connector Pin out ........... 11 Figure 6- DCE to DTE Interface.................. -
Page 5: Mdr24X Rf Transceiver
MDR24X User’s Manual 1. MDR24X RF Transceiver The MDR24X transceiver is a Frequency-Hopping Spread Spectrum (FHSS) radio designed for license-free operation in the 2.4GHz 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. -
Page 6: Mdr24X Specification
MDR24X User’s Manual MDR24X Specification Specifications MDR24X TRANSCEIVER PERFORMANCE Output power (w/ 3dBi antenna) 100mW Transmission range Up to 500 feet (450m) indoors; Up to 1 mile (1.6 km) line-of-sight Data rate Up to 115.2 Kbps RF Data Rate 576kbps fixed... -
Page 7: Mdr24X Interface
MDR24X User’s Manual MDR24X Interface MDR24X transceivers support RS-232/ RS-485 (2-wire Half Duplex) protocols. In a cabled environment, the RS-485 protocol can tolerate high noise and push signals over long cable lengths. RS-485 cabling can also communicate as far as 4000 feet (1200m) and offer multi-drop capability where up to 32 nodes can be connected. -
Page 8: Figure 2- Rs-232 Mdr24X Back View
MDR24X User’s Manual RS-232 Pin Assignments Figure 2- MDR242A Back View DB9 Male Connector Power Connector Input / Pin Description Output RS-485 (2-wire Half Duplex) Terminal Block Pin Assignments Figure 3- MDR244A Back View Terminal Block Power Connector Description 1 VCC (6 –18V)(125 mA max) -
Page 9: Figure 4- Mdr24X Mechanical Diagram
MDR24X User’s Manual MDR24X Mechanical Diagram Figure 4- MDR24X 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
MDR24X User’s Manual 2. Interfacing Protocol The MDR24X 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 MDR24X 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: Figure 5- Rs-232 Male/Female Connector Pin Out
MDR24X 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 MDR24X does not have a RS-485 address, therefore, it will transmit all RS-485 traffic over the RF. Conversely, as soon as a MDR24X receives a packet over the RF, it will transmit the packet over the RS-485 bus. -
Page 13: Hardware Flow Control
Hardware Flow Control Often, the host device can send data to the MDR24X faster than it can be sent over the RF. The MDR24X has a 256 byte buffer to store data before sending it over the RF. If the host device is sending data faster than the MDR24X can send it out, eventually, the buffer will fill up. -
Page 14: Network Topologies
This allows for the creation of a wireless network consisting of multiple nodes. By programming each MDR24X with a network specific Channel Number and System ID multiple networks can be created as shown below. -
Page 15: Mdr24X Configuration Utility Software
Random Back Off: In an asynchronous network where any node can talk at any time, the MDR24X can be programmed to use Random Back Off to mitigate the RF Link. If two nodes try to send packets at the same time, the packets will collide over the RF and will not be received by the destination node. -
Page 16: Optional Settings
It will designate each port it finds by displaying the full Windows identifier for the port. Select the port that is connected to the MDR24X unit. Baud Rate: Must be equal to the Interface Baud Rate setting of the MDR24X unit that is to be configured. - Page 17 “Communications Idle” is shown. About Button The About button can be pressed to determine the revision number of the software and the contact information for Black Box. Please include the software revision number in any correspondence with Technical Support. 10/26/2006...
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Page 18: Programming The Mdr24X Units
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 MDR24X unit to its normal mode of operation. -
Page 19: Programming The Mdr24X Units Troubleshooting
Read Radio displays error message: “Radio not Verify the PC Settings. responding.” Make sure the MDR24X unit uses the right serial cable. If any other program is running and is using the same COM port as the MDR24X, close that program and try to read the radio again.
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