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Chapter 1 Overview
Main module
The main module (Figure 6) is a housing that contains the main logic board and the Ethernet board. The main module can be “hot swapped”: it can be removed and installed without removing power from the termination module. When the main module is installed onto a powered termination module, it receives power and begins to operate automatically.
The main logic board provides an Ethernet LAN port, a PC interface port, and a modem port. It provides an internal interface to termination module I/O. It also provides Comm5 communication, 24 VAC power, alarm, and communication indicators. It communicates and exchanges data with the devices wired to the termination module. It also communicates with the display module.
The Ethernet board provides two LED indicators. One shows that an Ethernet link is detected; the other shows that there is serial traffic between the Ethernet board and the main logic board.
Figure 6. Main module
Main logic board
| Modem port |
Ethernet | PC interface port |
board |
|
| Ethernet LAN port |
6 |
|