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System overview
B1_CAB1
J5
CPU
TB2
A
NETWORK
OUT
A B
IN
B
AUDIO
A IN
B1_CAB2
J5
CPU
TB2
A
NETWORK
OUT
A B
IN
B
AUDIO
A IN
B1_CAB3
J5
CPU
TB2
A
NETWORK
OUT
A B
IN
B
AUDIO
A IN
B1_CAB4
J5
CPU
TB2
A
NETWORK
OUT
A B
IN
B
AUDIO
A IN
Figure 1-11: Typical Class A network data riser wiring using copper wire
Download connections
Each programmable rail module has a modular phone jack to use for downloading data directly from the SDU computer. The modular phone jack on any CPU module can also be used to download data to other programmable rail modules in the same panel over the rail bus, or to other panels over the network data riser.
In addition to the modular phone jack, the CPU module has two serial communication ports that can be used to download data, provided both of these conditions are met:
• A 3-RS232 option card is installed
• The serial port used to download data is not configured for gateway or coder applications
Tip:
To download data over the network without having to reconfigure the system, temporarily install a 3-RS232 option card on any CPU module in the system and connect the SDU computer to serial port 1.
1.18 EST3 Installation and Service Manual
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