Honeywell TotalPlant LCN, System Installation

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LCN System Installation 3-17 9/96
3.6.2
3.6.2 LCN Cable Connections
The LCN coax cable system consists of a dual run of coax cable called the “A Cable” and
the “B Cable.” Each cable connects to the coax connector on the module interface board
(CLCN A/B, CLCN A, or CLCN B) with a T-connector. Refer to Figure 3-12 and
Figure 3-13.
Five-Slot and Ten-Slot Modules have one set of coax connections for each module. These
connections are located on the CLCN A/B card in slot 2 at the rear of the module. A
minimum coax cable of 2 meters (6 feet) is used to connect one module to another.
DNPKG Modules have one set of connections for each DNPKG module. The A Cable
connection is located on the CLCN A board in the bottom slot (1) of the top node in a
DNPKG module. The B Cable connection is located on the CLCN B board in the bottom
slot (1) of the bottom node in a DNPKG module. A minimum coax cable of 2 meters (6
feet) is used to connect one module to another.
LCN Coax Cables
4095
Figure 3-12 — LCN I/O Board Coax Connections
LCN Coax Cable "A"
I/O Cage
I/O Cage
Upper Node
Lower Node
RS-485 to LCN Card
LCN Coax Cable "B"
T
T
= RS-485 Terminators
Power Connector
Chassis Gnd
T
RS-485 to LCN Card
Logic Gnd
3948
Figure 3-13 — KLCNA/KLCNB Board Coax Connections