Specifications
Table Of Contents
- Introduction
- Installation Procedures
- Commissioning Procedures
- Troubleshooting Procedures
- Overview
- Checking for Good Wire Runs
- Checking for Proper Termination
- Checking the End-of-Line Device Settings
- Checking for Proper Channel Selection
- Checking the N2 Device
- Checking the Number of Defined N2€Devices
- Checking the Length of N2€Bus
- Checking for “T” or “Y” Connections
- Checking for a Ground Loop
- Checking the Repeater
- Checking the Surge Protector
- Checking the Communication Terminal Board
- Checking Communication Faults
- Ordering Instructions
22
Network Communications—N2 Communications Bus
Figure 8 shows the standard N2 Fiber layout. Notice two S.I. Tech 2110
modems are needed for each conversion to fiber: one to convert the
standard N2 signals to optics, and the other to convert optics to the
standard N2 signals.
TBC
NCU
N
C
M
To Local
N2 Devices
To Local
N2 Devices
To R emot e
N2 Devices
N2 Bus
N2 Bus
Fiber
Cable
EOL=Out
EOL=In
N2FIBER1
NCM's
EOL=In
R
S.I.Tech
2110
T
Note: For end-of-line termination rules,
see the
Setting Terminations
section of this document.
S.I.Tech
2110
RT
Figure 8: N2 Bus Layout with Fiber Modems