14
Andover Controls
CPU with local and 1 remote I/O Module:
The I/O Bus that needs to be terminated is the one formed by the cable that starts at
the NetController and ends at the remote module. The bus that extends from the
NetController through the local I/O stack does not need termination. In this case, the
terminator resistor is connected directly across the communications lines (pins 1 & 2) at
the NetController and again at the remote I/O module.
CPU
5
4
3
2
1
5
4
3
2
1
120 Ω
Resistor
120 Ω
Resistor
Remote
I/O
Module
5
4
3
2
1
Local
I/O
Local
I/O
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