Johnson Controls Metasys N2 User Manual

Network Communications—N2 Communications Bus
45
SURGE5
Notes: For the surge protector's hard ground (HG), use 12 AWG stranded wire, 4.57 m (15 ft) maximum length.
Soft ground (SG) the N2 Bus shield within one inch of entering the enclosure with a 560-1000 pF capacitor.
Make sure wires entering surge protector's enclosure are not close to wires leaving the enclosure.
IAC/IFC/ILC - Shielded N2 Bus
* The IAC, IFC, and ILC must each be on a separate N2 Bus.
SG
S
Building One
2
4
6
8
10
1
3
5
7
9
Surge
Protector
Protected Unprotected
N2+
N2-
REF
REF
N2-
N2+
HRD GRD
NCM**
IAC, IFC, or
ILC*
HG
Metal Enclosure
Building Two
2
4
6
8
10
1
3
5
7
9
Surge
Protector
ProtectedUnprotected
HG
HG
HG
N2 Bus
+
-
R
REF
N2-
N2+
N2 Bus N2 Bus
+
-
R
+
-
R
+
-
R
** Standard, Fire, or Security NCM.
IAC, IFC, or
ILC*
Metal Enclosure
HG
N2+
N2-
REF
IAC, IFC, or
ILC*
S
S S
N2 Bus
SG
SG
HG
Figure 28: Installing Surge Protector for IAC/IFC/ILC

Johnson Controls Metasys N2 Specifications

General

Brand	Johnson Controls
Model	Metasys N2
Category	Cables and connectors
Language	English