AC4490-200M-485 Laird Technologies, AC4490-200M-485 Datasheet - Page 27

• Manufacturer Part Number: AC4490-200M-485
• Description: TXRX 900MHZ 3.3-5.5V TTL 200MW
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4490-200M-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: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: 20-pin mini connector
• 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

AC4490 User’s Manual
RS-485 DE Control - When enabled in EEPROM, the transceiver will use the GO0 pin to control the DE pin on external
RS-485 circuitry. If enabled, when the transceiver has data to send to the host, it will assert GO0 High, send the data
to the Host and then take GO0 Low.
R S 4 8 5 M o d e m M o d e
This mode is only useful for customers that wish to use RS485 DE in conjunction with standard Modem Mode. When
enabled in EEPROM in conjunction with Modem Mode, allows modem control lines over the RF. This mode should
only be used when RS485 DE is also being used. For all other applications, standard Modem Mode is preferred.
Available Modem control lines when RS485 Modem Mode is enabled:
M A X P O W E R
Max Power provides a means for controlling the RF output power of the AC4790. Output power and current
consumption can vary by as much as ±10% per transceiver for a particular Max Power setting. Contact AeroComm
for assistance in adjusting Max Power.
E N G I N E E R ’ S T I P
The max power is set during Production and may vary slightly from one transceiver to another.
The max power can be set as low as desired but should not be set higher than the original
factory setting. A backup of the original power setting is stored in EEPROM address 0x8E.
• CMD/Data on Server controls Hop Frame on Client
• GI1 on Server controls GO1 on Client
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S O F T W A R E I N T E R F A C E
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