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
38
Network Communications—N2 Communications Bus
Table 6 lists the specifications of the surge protector.
Table 6: Surge Protector Specifications
Category Specification
Product Name
Transient Eliminator
Generic Name
Surge Protector
Model Number
TE/JC04C12
Design
Three stage solid-state design using both metal oxide
varistors and silicon avalanche diodes for suppression
Response Time
Less than one nanosecond
Maximum Impulse
Current
(8/20 ms current impulse)
10 kA per conductor
Maximum Energy
Dissipation
80 Joules per conductor (10/1000 us)
Maximum Operating
Voltage
12 VDC
Protection
Common and normal modes
Suppression Voltage
Levels (Common mode)
100 kHz ringwave @ 200A: 15.8 volts
100 kHz ringwave @ 500A: 16.8 volts
3 kA combination wave: 20.8 volts
Negligible Insertion
Losses
At 9600 baud or lower
Maximum Number of
Protectors Allowed on
N2 Bus
No maximum; use as many as necessary and practical
Maximum Length of
N2 Bus Between
Two Buildings Using
Protector
1524 m (5000 ft) (standard N2 Bus specification)
Other Mechanical
Features
Encapsulated in Ceramgard for insulation and
environmental protection.
Two part design for easy connection and replacement of
protective device to base using edge connector.
Durable UL Recognized plastic enclosure material.
Dimensions (H x W x D)
63.5 x 50.8 x 25.4 mm (2.5 x 2.0 x 1.0 in.)
One pair of surge protectors is required whenever the N2 Bus is routed
outside between two buildings. The ATP recommends that the protector is
installed close to the N2 device that first receives the bus wires from the
outside. For extra protection, you are allowed to install another protector
on the same N2 segment at the entrance or exit of the building. However,
it is very important that the protector be installed near the first N2 device,
because, if it were installed at the entrance of the building only, transients
may be introduced inside the building farther down the line, thereby
risking damage to the N2 device.
The protector does not require that you use any special type of wire for the
N2 Bus, such as double-shielded twisted cable. Just use the standard
recommended twisted cable types.