RAD-...-IFS
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RSSI LED bar graph
Figure 4-14 Bar graph for point-to-point connection
In a point-to-point connection with just two wireless modules, the LED bar graph is active on
both the master and the repeater/slave.
Figure 4-15 Bar graph for point-to-multipoint connection
In a wireless network with more than one repeater/slave, only the yellow LED on the master
is permanently on. The signal strength in the master direction is displayed at the repeat-
ers/slaves. The signal strength always relates to the directly connected, overlapping wire-
less module.
If several repeaters/slaves are connected to a master, the master should theoretically indi-
cate the signal strength for several wireless modules. This is not possible for technical rea-
sons, however. This is why only the yellow bar graph LED lights up for the master.
You can read the RSSI values via the serial interface of the master wireless module using
Modbus/RTU commands (see Section “RSSI signal and error code registers” on page 82).
Master
Repeater /
Slave
RAD-2400-IFS
RAD-ID
Reset
+24 V
0 V
RSSI-
RSSI+
ANT
SPORT
0 1
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-2400-IFS
RAD-ID
Reset
+24 V
0 V
RSSI-
RSSI+
ANT
SPORT
0 1
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
Master
Repeater /
Slave
Repeater /
Slave
RAD-2400-IFS
RAD-ID
Reset
+24 V
0 V
RSSI-
RSSI+
ANT
SPORT
0 2
Pwr
Dat
Err
RXTX
D(A)D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-2400-IFS
RAD-ID
Reset
+24 V
0 V
RSSI-
RSSI+
ANT
SPORT
0 1
Pwr
Dat
Err
RXTX
D(A)D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-2400-IFS
RAD-ID
Reset
+24 V
0 V
RSSI-
RSSI+
ANT
SPORT
0 3
Pwr
Dat
Err
RXTX
D(A)D(B)
GND
RX
CO
1
NC
1
CO
2
TX
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