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
36
Network Communications—N2 Communications Bus
Surge protection is strongly recommended if the N2 Bus is wired between
buildings. The protection is provided by a voltage surge
suppressor/protector, which is installed on the N2 Bus near the N2 device.
Example applications are shown on Figures 21 and 22. Figure 22 shows
extra protection with the installation of one suppressor near the first N2
device and another at the point where the N2 Bus enters the building.
N2 Bus
Surge
Protector
N2 Bus
A
S
C
N
C
U
N
E
U
N
E
U
A
S
C
Surge
Protector
N2 Bus
N2 Bus
protect1
Figure 21: Surge Protector Installation on N2 Bus
Installing the
Surge
Protector