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
41
SURGE1
Metal Enclosure
NEU
HG
Building TwoBuilding One
2
4
6
8
10
1
3
5
7
9
Surge
Protector
N2+
N2-
N2 REF
SFT GRD
HRD GRD
ProtectedUnprotected
2
4
6
8
10
1
3
5
7
9
Surge
Protector
Protected
Unprotected
N2 Bus
N2+
N2-
REF
SFT GRD
HRD GRD
NCU
HG
Metal Enclosure
HG
HG
NCU/NEU - Unshielded N2 Bus
Metal Enclosure
NEU
HG
Building TwoBuilding One
2
4
6
8
10
1
3
5
7
9
Surge
Protector
N2+
N2-
N2 REF
SFT GRD
HRD GRD
ProtectedUnprotected
2
4
6
8
10
1
3
5
7
9
Surge
Protector
Protected
Unprotected
N2 Bus
N2+
N2-
REF
SFT GRD
HRD GRD
NCU
HG
Metal Enclosure
HG
HG
NCU/NEU - Shielded N2 Bus
HG
At NCU, wire shield to HRD GND connection.
For surge protector's hard ground, use 12 AWG stranded wire, 4.57 m (15 ft) maximum length.
Make sure wires entering surge protector's enclosure are not close to wires leaving enclosure.
Notes:
For surge protector's hard ground, use 12 AWG stranded wire, 4.57 m (15 ft) maximum length.
Make sure wires entering surge protector's enclosure are not close to wires leaving enclosure.
Notes:
N2 Bus
N2 Bus
N2 Bus
N2 Bus
+
-
R
+
-
R
+
-
R
+
-
R
S
S
S
S
+
-
R
+
-
R
+
-
R
+
-
R
Figure 24: Installing Surge Protector for NCU/NEU