Rs485 Line Termination - AERMEC AERWEB300 Manuel D'installation

RS485 line termination

If the RS485 line is longer than 150-200 m, the line should be balanced with 120 ohm, 1/4W resistors on the end parts. If AerWeb300 is
at one of the end parts of the line, simply insert the jumper supplied on jumper JMP2, on the side of the "RS485" connector; the resistor
is integrated in the AerWeb300. DO NOT insert the jumper if AERWEB300 is in the middle of the RS485 line; insert two resistors, one
at each end. The resistor is always connected to the last device connected to the RS485 line.
Respect the connection polarity to any RS485 connection. Example:
Jumper JMP2
30
GB
5154650_03
!
Sum of the length of the
connection cables = 150 m
Board 1
Board 2
Board "n"
Resistor 120 ohm
1/4W 5%