AC4790-200A-485 Laird Technologies, AC4790-200A-485 Datasheet - Page 55

• Manufacturer Part Number: AC4790-200A-485
• Description: TXRX 900MHZ 3.3-5.5V FHSS 200MW
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4790-200A-485

• Frequency: 902MHz ~ 928MHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: FHSS, FSK
• Applications: AMR, Fire & Security Alarms, Telemetry
• Power - Output: 5mW ~ 200mW
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Transmitting: 68mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: 20-pin mini connector
• Board Size: 49 mm x 42 mm x 5 mm
• Modulation: FHSS, FSK
• Security: 1 byte System ID, DES
• Operating Voltage: 3.3 V to 5.5 V
• Output Power: 200 mW
• Antenna: Integral and External Dipole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A P P E N D I X I I I - A P I
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N o r m a l R e c e i v e M o d e ( n o n - A P I )
If Receive API is not enabled, the transceiver will receive the reply data only (i.e. “ALLGOOD”) from each transceiver.
D A I S Y C H A I N / R E P E A T E R N E T W O R K
For applications spanning long distances and cases where the desired radio is not within range of the sending radio,
a daisy chain type network can be implemented. With the use of API commands, a processor and external buffer, a
daisy chain or repeater can easily be implemented to store and forward the data to the desired radio. The example
below assumes that radio A has a packet which needs to be received by radio D (far right).
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MAC 12 34 56
MAC 12 34 A1
MAC 12 34 A2
MAC 12 34 A3
Radio A transmits the string “FIND D” to Radio B using the Transmit API command.
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