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
Network Communications—N2 Communications Bus
19
Figure 5 shows an NCU in the middle of the single N2 Bus segment. The
N2 Bus in this network continues to function logically as a single bus.
N2 Bus
Operator Workstation
5-slot NCU
N2
EOL
Out
Operator Workstation
One
N2
EOL
In
ASC
(ILC Shown)
1-slot NEU
N2
EOL
Out
Self
Termination
N2 Bus
5-slot NEU
N1
EOL
In
N1
EOL
In
N1 and
All N2
EOLs
Out
LAYOUT2
N1 LAN
ASC
(UNT Shown)
Figure 5: N2 Bus Layout with NCU in the Middle