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Revision History 

Revision 

Date 

Author 

Change Description 

1 

10

/

18

/200

5

 

F. Perkins

Rev C

 

2 

11/19/2015 

R. Willett

R

ev D, R

eformatted to comply with new Murata V.I. 

RFM products are now 

Murata products. 

WIT2411

 

2.4GHz

Spread Spectrum

Wireless Industrial

Transceiver

Integration 

Guide

©2010-2015 by Murata Electronics N.A., Inc. 

WIT2411 Integration Guide11/30/15

www.murata.com

Содержание WIT2411

Страница 1: ...v C 2 11 19 2015 R Willett Rev D Reformatted to comply with new Murata V I RFM products are now Murata products WIT2411 2 4GHz Spread Spectrum Wireless Industrial Transceiver Integration Guide 2010 20...

Страница 2: ...ation using this antenna is forbidden Notice to users installers using the following fixed antennas with Murata products Andrews 24dBi parabolic dish Andrews 18dBi parabolic dish Cushcraft 15dBi Yagi...

Страница 3: ...01 489 1 17 EN 60950 Canadian Department of Communications Industry Canada IC Notice Canadian Department of Communications Industry Canada IC Notice This apparatus complies with Health Canada s Safety...

Страница 4: ...ode 13 3 PROTOCOL MODES 14 3 1 3 Connect Packet 16 3 1 4 Disconnect Packet base only receive only 16 4 MODEM INTERFACE 17 4 1 Interfacing to 5 Volt Systems 18 4 2 Evaluation Unit and Module Difference...

Страница 5: ...9 1 3 RF Specifications 41 9 1 4 Mechanical Specifications 41 9 2 Serial Connector Pinout 42 9 3 Approved Antennas 42 9 4 Technical Support 43 9 5 Reference Design 44 9 6 Mechanical Drawing WIT2411D...

Страница 6: ...isition typically locks to hopping pattern in 2 seconds or less Selectable 8 mW or 18 mW transmit power Built in data scrambling reduces possibility of eavesdropping Nonvolatile memory stores configur...

Страница 7: ...erference 1 2 Frequency Hopping vs Direct Sequence The two primary approaches to spread spectrum are direct sequence DS and frequency hopping FH either of which can generally be adapted to a given app...

Страница 8: ...advantage in that as the transmitter cycles through the hopping pattern it is nearly certain to visit a few blocked channels where no data can be sent If these channels are the same from trip to trip...

Страница 9: ...rpose of allowing compliant spread spectrum systems to operate freely without the requirement of a site license This regulatory convenience alone has been a large motivation for the industry wide move...

Страница 10: ...to the base station the remotes from which transmissions will be received and not discarded Registration also allows tracking of remotes entering and leaving the network The base station builds a tabl...

Страница 11: ...e data the base station adds some information to the transmission over the RF link It adds the address of the remote to which it is transmitting even though in a point to point mode there is only one...

Страница 12: ...ce and CRC bytes as in the point to point mode When the base station receives the data the base station will add packetization header bytes according to its protocol mode setting If the remote device...

Страница 13: ...as to send the remote will request more or fewer transmit slots Depending on the number of unused remote to base transmit slots the base radio either will assign one or more slots or will not assign a...

Страница 14: ...data rate the time it takes to transmit 2 816 bytes of data is 2 816 bytes x 8bits per byte 1228800bps 18 3msec Adding the 1 7msec of base overhead gives a total base time of 18 3msec 1 7 20 0msec Sub...

Страница 15: ...iven station due to noise interference or multipath fading For narrowband radio systems and also many spread spectrum radio systems which use direct sequence spreading this would imply a loss of conta...

Страница 16: ...discarded and missing data detection will be the responsibility of the user application Refer to the Protocol Commands section for complete details 2010 2015 by Murata Electronics N A Inc WIT2411 Inte...

Страница 17: ...rt the Sleep pin There are three modes for the escape sequence controlled by the Set Escape Sequence Mode command zc zc 0 Escape sequence disabled zc 1 Escape sequence available once at startup zc 2 E...

Страница 18: ...es which invokes the RF flow control mode See Set Packet Attempts Limit in Section 5 3 The receiving radio will not begin acknowledging transmissions from the transmitting radio until more room in the...

Страница 19: ...thout formatting to send data to the base if desired The WIT2411 protocol format is described in detail below The protocol format is selected through the Set Protocol Mode command Base radios can use...

Страница 20: ...0 1001 1100 0101 0000 0000 00SS SSSS LLLL LLLL LLLL LLLL 0 65536 bytes data Receive only CONNECT 1110 1001 1100 0101 10HH HHHH RRRR TTTT 00NN NNNN 3 byte remote ID DISCONNECT 1110 1001 1100 0101 11HH...

Страница 21: ...al for the first time after power up The base then assigns the remote a handle value may or may not assign it a dedicated time slice depending on the user settings and notifies the user application of...

Страница 22: ...he user on or off In normal operation this signal should be asserted When negated the WIT2411 buffers receive data until RTS is asserted 0v 1 Receive data RxD enabled 3 3v 0 Receive data RxD disabled...

Страница 23: ...driven low or tied to ground Pin 5 RTS and pin 6 SLEEP need to be pulled to ground on the 16 pin male header If you have the OEM module interfaced to an RS 232 transceiver RTS and DTR need to be pull...

Страница 24: ...be followed by either a carriage return or a line feed 5 1 Serial Commands These commands affect the serial interface between the modem and the host The default settings are 115 200 bps and protocol m...

Страница 25: ...ern Mode 1 enables the global mode that allows remotes to link to any base station they can hear acquiring whatever hop pattern is required In this mode a remote can only change base stations once it...

Страница 26: ...0 9 Set Alternative Frequency Band 0 FCC ETSI operation 2401 2471MHz default 1 Avoids 802 11b bands 1 2 2 Avoids 802 11b bands 3 4 3 Avoids 802 11b bands 5 6 4 Avoids 802 11b bands 7 8 5 Avoids 802 11...

Страница 27: ...a given attempt When this parameter is set to FFH RF flow control mode is entered for transmissions from the radio See Section 2 3 4 This mode can be entered for one or both radios in a point to point...

Страница 28: ...sequence method of accessing Control Mode by transmitting the string WIT2411 When this mode is set to 1 the escape sequence only works immediately after reset When set to 2 the escape sequence may be...

Страница 29: ...mmand afterwards if you wish the factory default settings to be remembered the next time you cycle power or reset the radio Recall Memory Useful for restoring the power on settings after experimenting...

Страница 30: ...Status Commands zb 0 1 Banner Display Disable zc 0 2 Set Escape Sequence Mode zh Read Factory Serial Number High Byte zm Read Factory Serial Number Middle Byte zl Read Factory Serial Number Low Byte z...

Страница 31: ...t the CD included in the developer s kit Select the drive letter of the CD drive and click continue The USB drivers will be installed automatically Connection is made to the RS 232 port of HN 511s thr...

Страница 32: ...er asserting DTR The base station will transmit this data but the remote will not be synchronized with the base station and will not receive the transmission In this instance do not connect the Sleep...

Страница 33: ...and Software CD included in the developer s kit Install WinCOM by navigating to the Software Tools directory on the Manuals and Software CD and double click on wincom2 1 exe follow the installation w...

Страница 34: ...dows functionality in typical fashion The Options menu contains the selections Show Comm Errors which lists any errors encountered in the PC UART Check Comm Ports on Bootup tells WinCom to verify each...

Страница 35: ...Display Disable command zb0 The COM port and baud rate can be changed using the drop down menus on the bottom right All the available COM ports will be listed in the menu but will have OK or N A desig...

Страница 36: ...save the parameters m is issued the new parameters will only be valid until power is cycled or DTR is toggled by pressing the F1 key twice New parameter values that have been issued are saved to non...

Страница 37: ...rsor to the left side of the window but the character corresponding to 0xd value of the carriage return will be displayed Similarly if the Hex Mode box is checked all characters are displayed in hexad...

Страница 38: ...odem to another WIT2450 this allows you to see what you are typing F6 Toggles stream mode Causes WinCOM to transmit a repeating pattern of characters Useful for testing F8 Toggles binary mode Displays...

Страница 39: ...here is no need to click Stop Clicking on the Transmit button a second time will have the string transmitted a second time The third allows for checking of available Comm Ports and is useful for refre...

Страница 40: ...to Transmit window In the bottom window you will see the entire packet being built as the data is entered in the windows When all the data has been entered click on the Transmit button to send the dat...

Страница 41: ...waits 200 milliseconds asserts DTR waits 200 milliseconds sends the configuration mode escape sequence waits 200 milliseconds and then sends the m command to the radio What this script file does is s...

Страница 42: ...lays with a bar showing loading progression Once the file has finished transmitting the Final Average Throughput and Bytes sent numbers will be displayed Finally the eighth tool is Save to File which...

Страница 43: ...ontrol mode for each unit To access modem control mode use the F1 key to toggle DTR to 0 and back to 1 and then press the F3 key which sends the wit2400 escape sequence If you are not using COM24 simp...

Страница 44: ...ed Make sure that RTS is asserted to enable receive character flow In a point to point application if a remote is not receiving data check that the base s default handle is the same as the remote s In...

Страница 45: ...conditions Sometimes this symptom is caused by an application that is explicitly dependent on the timing of the received data stream The nature of the packetized RF channel imposes a degree of unpredi...

Страница 46: ...ower 18 dBm 20 dBm effective radiated Line of site Range approx 6 10 of a mile w 2dB dipole Frequency Range 2401 2495MHz Number of Channels 43 27 or 15 depending on hop set Receiver Sensitivity 89dBm...

Страница 47: ...of the inputs TXD CFG RTS and SLEEP are terminated for proper operation 9 3 Approved Antennas The WIT2411D is designed to ensure that no antenna other than the one fitted shall be used with the device...

Страница 48: ...nical Support For technical support call Cirronet at 678 684 2000 between the hours of 8 30AM and 5 30PM Eastern Time 2010 2015 by Murata Electronics N A Inc WIT2411 Integration Guide 11 30 15 43 of 4...

Страница 49: ...OUT R3OUT R2IN R3IN R1IN VCC V V FORCEON FORCEOFF INVALID GND T4IN T5IN T2IN T3IN T1IN DTR_SLEEP_3 3V RS232 Interface D1 MBR0520L 1 2 CTS_3 3V C3 1 uF TXD_3 3V RXD C5 0 1uF 1 2 RXD_3 3V R1 10k 1 2 C1...

Страница 50: ...WIT2411 9 6 Mechanical Drawing WIT2411D 2010 2015 by Murata Electronics N A Inc WIT2411 Integration Guide 11 30 15 45 of 46 www murata com...

Страница 51: ...on shall be brought against Seller more than twelve 12 months after the related cause of action has occurred Buyer has not relied and shall not rely on any oral representation regarding the goods sold...

Страница 52: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Murata WIT2411F...

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