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BECKWITH ELECTRIC BlueJay M-2911, Instructions Manual

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BECKWITH ELECTRIC BlueJay M-2911 Instructions Manual Download Page 12

M-2911 BlueJay Wireless Data Transceiver

–12–

RS-485 Communication

6
5
4
3
2
1

SGND

D+

D -

N/C
N/C
N/C

M-2911

6 Pin Terminal

Block P1

RS-485

Network

SGND
D+
D -

Figure 6 RS-485 Pin-out

RS-485 is a single shielded twisted pair (two wires plus shield), from M-2911 to IEDs in parallel.

M-2911
RS-485

200 

 

200 

 

IEDs In Parallel

IED

IED

6
4
5
1
2
3

SGND

D  -

D +
N/C
N/C
N/C

RX/TX

Figure 7 RS-485 Example IEDs in Parallel

Summary of Contents for BlueJay M-2911

Page 1: ...aster slave high speed 1 Mbps data transmission rates at ranges up to 1500 feet Interfaces using either a RS 232 RS 422 or RS 485 connection at interface baud rates between 300 and 115 2 Kbps Substation hardened to withstand temperatures from 40 to 80 degrees C and humidity up to 95 No user license required interfaces with almost any legacy IED ...

Page 2: ...s not installed and used in accordance with the operating instructions it can cause harmful interference to communications If this equipment causes harmful interference to radio or television reception the user should try and correct the interference by Reorienting or relocating the receiving transmitting antenna Increasing the separation between the equipment and the M 2911 Connecting the equipme...

Page 3: ...ace baud rate Communication The M 2911 conditions the data and transmits it over a half duplex direct sequence spread spectrum radio operating in the 2 4 GHz ISM band The over the air data rate is 1 Mbps Transmit Frequency Range 2400 MHz to 2483 5 MHz Output Power 30 mW Modulation DBPSK Occupied Bandwidth 20 MHz Spurious Emissions 50 mV meter Harmonic Emissions 500 uV meter Spreading Method Direct...

Page 4: ...er output of 2 5 Watts The power supply is equipped with an external 5 5 mm outside diameter 2 1 mm inside pin center positive connector Figure 1 Power Supply Connector Polarity Alternate Power Any power source that meets the above requirements may be used to power the unit For example a cigarette lighter DC adapter which may be purchased from any electronics retailer can be used provided that the...

Page 5: ...ugh RS 232 cable to a PC or laptop computer running a terminal emulator program such as Microsoft HyperTerminal set to 9600 bps No Parity One Stop Bit 2 Apply power to the M 2911 When prompted onscreen type All three LEDs on the unit should illuminate while in Command Mode The M 2911 will enter AT Command Mode and respond with OK The user can then enter AT Commands by typing them into the terminal...

Page 6: ...to Destination Address 255 will receive these transmissions no matter what their Unit or Multicast Address is This is the Broadcast Address and is used for system wide commands for example Load Reduction commands In this case also units receiving data with this Broadcast Address will not attempt to acknowledge this transmission Baud Rate ATB nnnnnn 4800 9600 14400 19200 28800 38400 57600 76800 115...

Page 7: ...The M 2911 can communicate using RS 232 five wire mode TxD RxD RTS CTS and GROUND RS 422 TxD TxD RxD RxD GROUND or RS 485 D D GROUND This parameter selects which interface mode is active The RS 232 signals are available from the 9 pin DB female connector while the RS 422 485 signals are on the terminal strip The unit should have only one type of communications cable connected at a time RS 232 Mode...

Page 8: ...lay the model name software version serial number and basic settings of the unit Exit and Save ATZ CAUTION This command MUST be sent to the unit after any changes are made to save and exit from command mode otherwise all information will be lost Typical Connections Guide The M 2911 can be applied in one of two methods An example of each connection configuration utilizing a Beckwith Electric M 2001...

Page 9: ...on under AT commands for details i e ATS 2 to 250 ATD 1 ATM 251 c At a remote location an RTU has been configured to dial the modem located at the control house and poll each unit at the substation at 5 minute intervals For this application to operate successfully the RTU cannot poll all units simultaneously In addition to these methods the M 2911 can be configured using RS 485 or RS 422 See the f...

Page 10: ... 2 RS 232 Pin out RS 232 is point to point four wires plus shield from M 2911 to one IED RS 422 Communication 1 2 3 4 5 6 SGND D D D D SGND M 2911 6 Pin Terminal Block P1 RS 422 Connection 1 2 3 4 5 6 SGND D D D D SGND Shielded Twisted Pair RX TX TX RX Figure 3 RS 422 Pin out RS 422 is a dual shielded twisted pair four wires plus two shields from M 2911 to one IED ...

Page 11: ...22 RX TX IED 200 200 Figure 4 RS 422 Example IED RS 422 network is a dual shielded twisted pair four wires plus two shields from M 2911 to IEDs in parallel 1 2 3 4 5 6 SGND D D D D SGND M 2911 RS 422 RX TX 200 200 IEDs In Parallel IED IED Figure 5 RS 422 Network Example IED s in Parallel ...

Page 12: ...M 2911 6 Pin Terminal Block P1 RS 485 Network SGND D D Figure 6 RS 485 Pin out RS 485 is a single shielded twisted pair two wires plus shield from M 2911 to IEDs in parallel M 2911 RS 485 200 200 IEDs In Parallel IED IED 6 4 5 1 2 3 SGND D D N C N C N C RX TX Figure 7 RS 485 Example IEDs in Parallel ...

Page 13: ...to and close to the antenna such as a wall located next to the antenna it can change the impedance match between the antenna and free space This condition can severely reduce the range that can be normally obtained in unblocked directions A rule of thumb is to ensure that any grounded objects are kept at least 10 wavelengths 50 inches for 2 4 GHz away from the antenna in the plane of radiation Fig...

Page 14: ... W R R X T X C O I N C E L E C T R IC BE C KW IT H IED 50 Sub Station Control Hous e M 2911 BlueJay T M Wireless M 2911 M a d e i n U S A P W R R X T X C O I NC E L E CT R I C B E C KW I T H IED or MODEM 50 Recommended 50 from wall of building BlueJay T M Wireless M 2911 M a d e in U S A P W R R X T X C O I N C E L E CT R IC B E C KW IT H IED 50 M 2911 M 2911 No Obstructions Between Antennas Figur...

Page 15: ...board is conformally coated to inhibit fungus growth Enclosure 1 16 Aluminum Physical Size 5 88 high with antenna 9 43 x 3 88 wide x 2 5 deep 14 58 cm 23 1 x 9 9 cm x 6 13 cm See Figure 10 for dimensional drawing Weight 2 13 oz 60 grams Enclosure meets requirements of IP30 BlueJay TM Wireless M 2911 Ma de in U S A 25 PWR RX TX 1 15 2 75 3 08 3 38 3 88 93 2X 38 1 00 3 62 2X 5 50 1 50 4 51 56 20 DIA...

Page 16: ...ions Instead refer all such service requirements to Beckwith Electric Co Inc Unit must be returned for service in secure preferably original packaging Shipping cost must be paid by user Only the antenna provided is authorized for use with the M 2911 If the antenna is lost or damaged please contact Beckwith Electric Co Inc to secure a replacement antenna This product generates uses and can radiate ...

Page 17: ...instruction manual may cause harmful interference to radio communica tions Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense 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 interfer...

Page 18: ...ECTRIC CO INC 6190 118th Avenue North Largo Florida 33773 3724 U S A PHONE 727 544 2326 FAX 727 546 0121 E MAIL marketing beckwithelectric com WEBPAGE www beckwithelectric com 800 2911 SP 02MC1 11 04 2002 Beckwith Electric Printed in U S A 8 26 03 ...

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