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Hoofdstuk 11 │ RS485 digital output
The MX 43 units using the RS485 Modbus option are equipped with a
communication card (code 6314114), which is affixed to the motherboard.
This card generates a RS485 output in Modbus RTU format.
Description of the card
Afbeelding 52: the RS485 card.
Rep.
Function
A.
Operating LEDs. The Rx LED lights up when a data thread is received.
The Tx LED indicates that the card has power and turns off when data
is being transmitted out.
B.
Unused switch.
C.
Unused output.
D.
Connection terminal for output n° 1.
A = Tx or +RS485.
B = Rx or –RS485.
E.
End Of Line (EOL) resistance for output No. 1. Set the switch to the
EOL position for the unit that is the last module in the RS485 network.
For other units, set the switch to NO EOL.
The RS485 output can be configured using the COM 43 software, or using
unit menu 2.4 Program >RS485 Port (see page 47).
11- RS485 digital output
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