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Converging Systems Inc.
Page 23
Rev.5.0.0
A2-4.2 RS-485 Terminators
Applicability Note:
RS-485 communication is designed around end-of-bus resistor termination.
This guarantees error-free communication despite external noise and other sources of interference.
It is highly advised that when more than one IMC-300MKII or IMC-100x Controller is
interconnected, one terminator is placed on one end of the bus and another terminator is placed on
the other end of the bus. It does not matter into which CS-Bus port these terminators are
connectors so long as they are at the very beginning of the bus and the very end of the bus.
RJ-25 connector terminator wiring (See
Figure 13
)
#1 ---
#2 ---
#3 120 ohm resistor connection
#4 120 ohm resistor connection
#5 ---
#6 ---
Figure 12