Connecting The Rs-485 Interface - Johnson Controls FC-2000 Installing

The control panel communicates with the ACM, LCD-80, NIB-96,
Connecting the
ACM-8R, and LDM modules through the RS-485 interface on the CPU.
RS-485
The RS-485 interface is also used to connect to an AMG-1 in the Fire
Interface
Fighter's Command Center. To get access to the RS terminal block
(which is installed on the lower CPU board), unplug the right-most
terminal block of TB1.
Note: Twisted shielded cable is required.
34 Installation—Installing the FC-2000
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R S - 4 8 5
Figure 25: Connecting the RS-485 Interface
Terminal shield of the
twisted shielded pair to the
entrance point of the cabinet.
eia-485