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2.1 RS-232 to RS-485 Status LED Indicators
Figure 4
No
LED Colour
1
Red
2
Yellow
3
Green
Figure 5
2.2 Input Power Supply Requirements
The power supply requirements for the 'RS-232 to RS-485 Convertor Module' are detailed
in the table below. The current drawn by the module from the external power supply varies
from a Standby Current when no data transfer is taking place to an Active Current when data
transfer is taking place.
Parameter
Standby Current
Active Current
Supply Voltage
Figure 6
RS232-RS485 Convertor Manual V1.02 28/06/01
Status Description
Indicates that the PC has enabled RS-485 transmission.
This means that the RS-485 driver has been enabled allowing
the convertor to drive the RS-485 line to the remote system.
Indicates that the remote RS-485 system is transmitting data
to the PC through the convertor. The LED will flash when
data is being transmitted.
PC is transmitting data to the remote RS-485 system.
The LED will flash when data is being transmitted.
Values
Min
Typical
10
8.3
9.0
Units
Max
mA
1000
mA
9.9
V DC
3
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