CL4490 User’s Manual
1.3 CL4490 Interface
The CL4490 supports RS-232/RS-485 (2-wire Half Duplex) protocols. By definition, RS-485
protocol can tolerate high noise and push signals over long cable lengths. When using cables,
RS-485 will communicate as far as 4000feet (1200m) and offer multi-drop capability where up to
32 nodes may be connected. RS-232 cables are suitable for distances less than 100 feet
(30.5m). AeroComm wireless solutions are not subject to the cabling restrictions for distance, but
either interface (RS-232 or RS-485) is available when ordering the CL4490s.
Figure 1- RS-232/RS-485 CL4490 Front View
RPSMA Antenna Connector
Status LEDs
Pwr Link Rx Tx
CL4490 Status LEDs
LED Color Description
Pwr Green On indicates that the unit is powered up.
Link Red
On indicates the Client unit(s) and Server unit are in range of one
another. Link LED remains activated on Server units. Client units
activate the Link LED when in range of the Server unit.
Rx Green When flashing, LED indicates CL4490 unit is receiving data.
Tx Red When and flashing, LED indicates CL4490 unit is sending data.
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