Global Fire Equipment //
globalfire.pt
ma_chmcomm_01_010001_en_191121
RS422 connections example
The following scheme shows how to interconnect two panels with two redundant independent RS422 network paths.
This will use 4 flat cables, two “per” panel and two for each physical connection.
RS422 External Connection
Panel 1 Panel 2
RX1 A
⟵
TX2 A
RX1 B
⟵
TX2 B
TX1 A
⟶
RX2 A
TX1 B
⟶
RX2 B
The 4 wire external RS422 connections should be made as follows:
FIBRE-OPTIC connections example
The following scheme shows how to interconnect two panels with two redundant independent Fibre network paths.
This will use 4 flat cables, two “per” panel and two for each physical connection.
Connections are made using fibre optic cables instead of copper cables. The ends of the fibre must be terminated with ST™
type Fibre-optic connectors.
Fibre-Optic External Connection
Panel 1 Panel 2
CH2
CH1
TX2
⟶
RX1
RX2
⟵
TX1
The dual fibre external fibre-optic connections should be made as follows:
If more than two panels are connected, the same wiring logic should be applied. Interfaces should all be connected in a
daisy chained form (CH2 to next CH1, and finally close loop from last CH2 to first CH1). For further instructions please
consult INT 422 or INT FO interface manual.
13
