Document: 553632
(ICSTT-RM448_EN_P) Issue: 08:
3-11
Note: Each processor uses the two serial ports above it on the baseplate. Data is not
mirrored between ports. Therefore a single processor system has two ports available,
a dual processor system has four ports and a triple processor system has six ports
available to it.
RS485 Full
RS485 FullRS485 Full
RS485 Full-
--
-D
DD
Duplex
uplexuplex
uplex
This is a 4-wire point to point connection. The receive end should always be
terminated a resistor and capacitor as shown in the diagram or similar termination.
The recommended values are 120R + 100nf.
RS485 Full Duplex Multiplexed
RS485 Full Duplex MultiplexedRS485 Full Duplex Multiplexed
RS485 Full Duplex Multiplexed
This is a 4-wire multi-drop connection. Circuits with multiple transmitters should be
terminated at both ends as shown in the diagram. On circuits with one transmitter the
line should be terminated with the recommended values at the far end (usually the last
receiver in the chain).
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