9-EN
-T/R
RTN
+T/R
X20 X21 X22 X23 X24 X25 X26 X27
D
A
X20 X21 X22 X23 X24 X25 X26 X27
D
A
RTN
+T/R
-T/R
X20 X21 X22 X23 X24 X25 X26 X27
D
A
X20 X21 X22 X23 X24 X25 X26 X27
D
A
120 TERM.
RESISTOR
Ω
ON
120 TERM.
RESISTOR
Ω
OFF
120 TERM.
RESISTOR
Ω
OFF
X20 X21 X22 X23 X24 X25 X26 X27
D
A
RTN +T/R -T/R
12
3
4
1234
120 TERM.
RESISTOR
Ω
ON
Make sure that each
55 kW module in the chain
has a RS485 address that is
different from the others.