Black Box MDR210A-485 User's Manual
Contents
1. FCC Compliance Warning Warning This device complies with part 15 of the FCC Rules Operation is subject to the following 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 142. BLACK BOX NETWORK SERVICES MDR210A 485 900 MHz Frequency Hopping RS 485 Master Slave auto sensing radio interface Black Box Corporation Lawrence PA http www blackbox com Ph 877 877 BBOX Fax 724 746 0746 Table of Contents DescripEOTIe soc uoc nE EE Dox eudend ues ESA oeiane Fre EK UR 3 FEA CUPES wists EM 4 Serial Port SCanninG sede eased el ge mentem lie ced niin 5 Application Fields e orbe i ert i x xev xdi s 5 NEW ORK Suse ERE 5 Module Addt ess eno ROO cert nad vex a patte tcs 6 Data Mallditya i esL rre EREE IR Lec pese elec Een Ete 6 7 GLOSS aly Re EN E O a eae 7 8 Application NOES x iereesisee ee race Eder ia ori gelex veo me Fano eda 9 10 Appendix A SpecificationS sssssesssssrssrsrrsrrerrerrrrrrerrer 11 FCC Compliance uo oec uo eec ae 12 Description The MDR210A 485 uses an embedded 100 milliwatt frequency hopping wireless modem that provides communication between a local RS485 network and a remote network of RS485 connected devices The MDR210A 485 will automatically sense the direction of data flow and switch the RS485 and Radio devices accordingly The MDR210A 485 can be placed in a network of RS485 devices and appear as a slave repeater of remote RS485 devices or it can be placed in a network of one or many RS485 slaves and act as the RS485 repeater of a remote master The radio operates within the 900 MHz ISM Band under Part 15 of the FCC Rules and Regulations The MDR210A 485 ope
3. Frequency Hopping Spread Spectrum FHSS Method employed by the MDR210A 485 module which involves transmitting data over several different channels in a specific channel hopping sequence known by the transmitter and the receiver s Half duplex A mode for radio operations Radios that operate in half duplex are able to either transmit data or receive data at a given time but cannot do both simultaneously When one module is transmitting all modules within range listen to the transmission and will only transmit when the transmission is complete Module Addresses Provides a layer of addressing among modules Modules with the same Module Addresses can communicate together Networks Provides a layer above Module Addresses for communicating between modules Each network has a unique hopping sequence that allows modules on the same network to remain synchronized together RS 232 logic Standard logic levels implemented in devices using the RS 232 communication protocol Sensitivity A measurement specification that describes how weak a signal can be in dBm and still be detected by the receiver Serial Data Data that enters the MDR210A 485 module through its serial port Start bit A low UART signal to signify the beginning of an eight bit data sequence Stop bit The last bit in a UART data sequence The stop bit is high and indicates the end of an eight bit data sequence Synchronization Synchronization
4. is used to ensure that the transmitter and receiver are communicating properly with each other and following the same channel hopping sequence Transmission Latency Time required to send a packet of data This value is dependent on the number of bytes being sent and the baud rate of the module Transmit Mode Mode of operation in which over the air data can be transmitted from a module to other modules 10 Application Notes Why does Sensitivity Matter Receiver sensitivity is the lowest power level at which the receiver can detect a wave and demodulate data Sensitivity is purely a receiver specification and is independent of the transmitter As the wave propagates away from the transmitter it attenuates as the distance increases Lowering the sensitivity on the receiver making it more negative will allow the radio to detect weaker signals and thus increase the transmission range Sensitivity is vitally important since even slight differences in receiver sensitivity can account for large discrepancies in the range To better understand this relationship the following example is provided Example Compare the MDR210A 485 module with 110dBm sensitivity to a commercial radio receiver with a sensitivity of 90 dBm The Friis transmission formula can be used to calculate received power or signal strength at any receiver location under line of sight conditions This formula is given by P t xG t xG r x2 P r F s x
5. to any near by persons If the OEM integrates the 9XStream into their final product where the final product utilizes a non approved antenna or is classified as a portable device per FCC Section 2 1093 less than 20 cm separation distance between the antenna to any near by persons the OEM is responsible for obtaining a separate authorization on the final product The 9XSTREAM radio requires a regulated 5 volt 200mA supply for operation Any voltage higher than 5 5 volts will damage the radio Approved Antennas Mfr Model Freq Gain Type Connector Dimensions Astron AXQ900 PTL 902 928 2dBi Omni MMCx 3 Astron AXH900RP SMA R 902 928 2dBi Omni Reverse Polarity SMA 6 5 MaxStream 900CDAN 902 928 2dBi Omni Integrated 3 External Label This device contains transmitter module FCC ID OUR9XTREAM The enclosed 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 9XStream Frequency Hopping Data Radio FCC Compliance Warning Changes or modifications to the 9XStream Data Radio not expressly approved by MaxStream Inc could void the user s authority to operate this product Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These
6. 4ar P r received power mW P t transmitted power mW G t gain of transmit antenna linear G r gain of receive antenna linear F s fading margin linear wavelength meters r distance between Transmitter and Receiver meters The following values were used to compare the range limitations of these modules P t 100mW G t and G r 2dB or 1 585 linear A 0 333 meters F s 21dB or 125 89 experimentally determined The table below demonstrates the power received at the receiver over the specified range between the TX and RX antennas assuming line of sight conditions 11 Application Notes cont Detectable Range Received X Detectable by by meters Power MDR210A 485 Commercial Radio 100 68 526 dBm YES YES 500 82 506 dBm YES YES 1000 88 526 dBm YES YES 3000 92 048 dBm YES NO 5000 102 506 dBm YES NO 8000 106 588 dBm YES NO 10000 108 526 dBm YES NO 11265 7miles 109 559 dBm YES NO 12000 110 805 dBm NO NO Since the range doubles every 6dB the 20dB sensitivity difference in radios corresponds to 2 20 6 10 08 times the range using the MDR210A 485 radio 12 Appendix A Specifications General Frequency Range 902 to 928 MHz unlicensed ISM Band Type Frequency Hopping Spread Spectrum Transceiver Frequency Control Direct FM Transport Protocol Transparent Networking C
7. The Scan Function is provided to assist the user when they are unsure which communication port the MDR210A 485 is attached to or what baud rate it has been set to The Scan Function will attempt to communicate with the MDR210A 485 over every port installed on the PC at every allowed baud rate While this is not a fast process it does allow the recovery of a device whose configuration is unknown If the Scan Function is unable to determine the port which the MDR210A 485 is attached to the user will be notified The user should then ensure that no other application has the communication port in use before re attempting the Scan Application Fields COM Port Specifies which PC communication port the MDR210A 485 to be configured is attached Scan The scan function iterates each available PC communication port looking for an attached MDR210A 485 If an MDR210A 485 is found its COM Port and current Baud Rate values are provided Network ID All communicating MDR210A 485s must be programmed to the same Network ID The valid values are from hexadecimal 1 to FFF Hop Table All communicating MDR210A 485s must be programmed to the same Hop Table The valid values are 0 to 6 Independent networks in the same vicinity should use different Hop Tables to minimize packet collisions Baud Rate This is the desired communication Baud Rate between the host and the MDR210A 485 Setup Send the currently selected values to the MDR210A 485 attached to
8. hannel Capacity Hops through 25 channels Up to 65 000 NetlDs Serial Data Interface Asynchronous RS 232 levels Serial Interface Baud Rate Data Throughput Performance Channel Data Rate 10k or 20k bps Respectively vary with data rate Transmit Power Output 100mW Rx Sensitivity 110 or 107 dBm Respectively Range Indoor 600 to 1500 Outdoor 7mi With dipole over 20 mi with high gain antenna Interference Rejection 70 dB at pager and cellular phone frequencies Power Requirements Supply Voltage 5 VDC 0 3V Current Consumption Tx 170 mA nominal Rx 50 mA nominal Physical Properties Board Size 1 6 x 2 7 x 35 4 06 x 6 86 x 89 cm Weight 8 oz 249 Connectors 11 pin 0 1 spaced male berg type header Operating Temperature 40 to 85 C Operating Humidity 10 to 90 non condensing Antennas Antenna Connector MMCX Female Approved Antennas 227 Range calculations are for 9600 baud radio line of sight Actual range will vary based upon specific board integration antenna selection environment and the OEM s device Antenna Antenna Connector MMCX Female Antenna Impedance 50 Ohms unbalanced Approved Antennas Integral wire antenna factory installed Astron AXQ9PRLMMCX 1 4 wave flexible whip Astron AXH900 RP SMAR 1 2 wave flexible whip SMA 13
9. he first data packet is sent another header will be sent if data is available in the buffer The header is followed by another data packet The second data packet and all subsequent data packets will consist of data that accumulated in the buffer while the previous data packet and header were being sent see Figure 2a The size of each data packet can vary up to 64 bytes This progression can be seen in Figure 2b Sent Data Data Data Header Packet 1 Header Packet 2 Header Collect Data for Collect Data for Packet 2 Collect Date for Packet 3 Packet 1 8 Group Data into Packets Figure 2a Generation of Data Packets Data Validity Cont Header Data from Buffer No Data To Idle Mode Figure 2b Transmit Mode Description To verify data integrity a 16 bit cyclic redundancy check CRC is computed for the transmitted data and attached to the end of each data packet before transmission The receiver will then compute the CRC on all incoming data Any received data that has an invalid CRC is discarded Glossary Data Buffer Collects incoming serial data prior to over the air data transmission The data buffer can hold up to 132 bytes at a given time Data Packets A grouping of data to be sent over the air Each data packet contains a header and data that is collected from the data buffer The size of the packets varies up to 64 bytes depending on how many bytes of data are in the data buffer Glossary cont
10. limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help 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 Antenna Antenna Connector MMCX Female Antenna Impedance 50 Ohms unbalanced Approved Antennas Integral wire antenna factory installed Astron AXQ9PRLMMCX 1 4 wave flexible whip Astron AXH900 RP SMAR 1 2 wave flexible whip SMA Serial Port Scanning
11. o sensing radio interface e Built in 900MHz frequency hopping radio for long range wireless interface e Provides remote capability to RS485 Modbus networks e Automatically senses Master or Slave data flow Multiple radios allow many remote RS485 networks to coexist logically e Provides means to connect legacy RS485 devices to wireless e Range Indoor 600 to 1300 e Range Outdoor 7mi with dipole gt 20 mi w high gain antenna e LED power and activity indicator e Configuration parameters set by dipswitch e Low power 6 24 VDC at 200 milliamp transmitting 70 milliamp receiving e Astron AXH900RP SMA R Reverse Polarity SMA 6 5 Antenna General MDR210A 485 Frequency Range 902 to 928 MHz unlicensed ISM Band Type Frequency Hopping Spread Spectrum Transceiver Frequency Control Direct FM Transport Protocol Transparent networking Channel Capacity Hops through 25 channels Up to 65 000 network identifiers Serial Data Interface Asynchronous RS232 levels CMOS TTL Signals 5V 3 3V Tolerant Serial Interface Baud Configurable from 2400 57600 bps Rate Data Throughput 9600 bps Network Topology Point multipoint point to point multi drop transparent networking Performance Channel Data Rate 10k or 20k bps respectively vary with data rate Transmit Power Output 100mW Rx Sensitivity 110dBm or 107dBm Respectively Range Indoor 600 to 1500 Outdoor 7 mi
12. rates at 19200 Baud at either odd parity or no parity Dipswitches select parity and one of 7 radio networks Radios operating together must have the same radio network address 1 7 set by switches labeled A0 A2 Select a different radio network address to prevent interference from nearby networks that are not sharing information The default radio network for Rooftop applications is 5 The user may choose another network address 1 7 if desired While all radios in a network must have the same network address they do not have to have the same parity The parity is local to the RS485 serial port on the MDR210A 485 only Parity information is not transmitted or received Radio network selection O A0 A1 A2 all set to 0 selects a special network setup When network address setting 0 is selected the pre programmed radio network parameters are used These parameters are user and application specific and must be set at the factory for specific OEM applications The MDR210A 485 can also be used as a general purpose RS485 half duplex radio interface operating at 19200 Baud at either odd or no parity dip switch selectable PARAMETER MIN TYP MAX UNITS Supply Voltage 6 0 12 24 Volts Supply Current 70 200 mA Baud Rate 19200 Baud PIN SIGNAL DESCRIPTION 1 TR RS485 transmit receive negative I O 2 TR RS485 transmit receive positive I O 3 GND Common Features e RS485 Master Slave aut
13. the specified communication port Close Exits the Application Networks There are seven available networks Hop Tables Each network utilizes a different pseudo random hopping sequence to navigate through the shared hopping channels In the event that two modules from different networks collide on a channel because they hop in a different sequence the two modules will jump to separate channels on the next hop Using networks multiple module pairs can operate in the same vicinity with minimal interference from each other The network parameter is user definable using the MDR210A 485 Set up Hop Table Module Address Module Addresses provide another level of addressing among the MDR210A 485 modules Each module in a network can be configured with a 16 bit Module Address to establish selective communications within a network This address is set to 65535 values using the MDR210A 485 Set up Hop Table command All modules with the same Module Address can transmit and receive data among themselves Any modules on a network with different Module Addresses will still detect and listen to the data in order to maintain network synchronization However they will not send the data to their serial ports if their Module Addresses do not match the Module Addresses of the transmitter Data Validity The first data packet transmitted contains all bytes that accumulated in the data buffer while the header see Figure 2a below was being sent After t
14. with dipole over 20 mi with high gain antenna Interface Rejection 70 dB at pager and cellular phone frequencies Range calculations are for 9600 baud line of sight Actual range will vary based upon specific antenna selection and environment 9XSTREAM 192 96 Radio Introduction The 9XSTREAM 192 96 radio is a 100 milliwatt frequency hopping wireless modem that communicates with other equipment using a standard 19200 or 9600 baud asynchronous serial data stream The radio is half duplex and can sustain a continuous data stream at the specified data rate The 9XSTREAM operates within the 900 MHz ISM Band under Part 15 of the FCC Rules and Regulations IMPORTANT The 9XSTREAM radio has been certified as a module by the FCC for integration into OEM products without further certification being necessary as per FCC section 2 1091 The OEM must satisfy the following requirements in order to comply with FCC regulations The system integrator must ensure that the external label provided with this device is placed on the outside of the final product In order to comply with the FCC RF exposure requirements the 9XSTREAM may be used only with approved antennas that have been tested with this radio and a minimum separation distance of 20 cm must be maintained from the antenna to any near by persons The OEM must also include a statement in the final product manual informing users of the requirement to maintain 20 cm separation from the antenna
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