BECKWITH ELECTRIC BlueJay M-2911 Manual - Halaman 3
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Halaman CetakThe M-2911 Blue Jay
™
Universal Data Transceiver is a self-contained short-range wireless communication
device (SRD) that is used for transferring serial communication data between Intelligent Electrical Device's
(IED's) and computers hosting control software in an industrial environment. The M-2911 is based on an
Intersil direct sequence spread spectrum chip set that operates in the 2.4 GHz ISM band. The M-2911 design
meets the category for low power devices (LPDs) standard requirement for license-free operation.
Interface
The M-2911 is equipped with two serial data connectors, one is a DE-9 connector for use with an RS-232
serial data port and the other is a 6-pin bare wire Phoenix–type connector for use with an RS-422/RS-485
(twisted shielded pair) serial data ports. Only one port can be used at a time. Each port is capable of serial
data speeds of up to 115 kbps.
Data Transmission:
• Error Detection – 16 bit CRC (10
• Maximum throughput – 1 Mbps RF, 2400 to 115.2 Kbps interface 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 Sequence 11 bit code
• Center Band – Carrier 2.450 GHz
Receive:
• Sensitivity – -93 dBm
• Selectivity – 25 MHz
■ NOTE: For maximum range, all antennae must be oriented in the same plane.
Power
The M-2911 includes a self-contained switching power supply that supplies the data and RF circuitry with
regulated dc power as required. The power supply has an external 3.5 mm outside diameter, 2.1 mm inside
pin, center positive power input jack designed to accept the output of a UL listed wall transformer power
supply included with each unit that delivers between 7 and 60 V dc at a maximum power output of 2.5 Watts.
Power Requirements:
• Operating Voltage – +7 to +60 V dc
• Transmit Current – 2 W (300 mA @ 7 V)
• Receive Current – 2 W (300 mA @ 7 V)
• Inlet Current – 1 W (150 mA @ 7 V)
• Sleep Current – 0.2 W (30 mA @ 7 V)
M-2911 BlueJay Universal Data Transceiver
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