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
2
Network Communications—N2 Communications Bus
Troubleshooting Procedures Page *51
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Overview *51
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Checking for Good Wire Runs 51
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Checking for Proper Termination 52
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Checking the End-of-Line Device Settings 52
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Checking for Proper Channel Selection 52
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Checking the N2 Device 52
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Checking the Number of Defined N2 Devices 52
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Checking the Length of N2 Bus *53
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Checking for “T” or “Y” Connections 53
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Checking for a Ground Loop 53
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Checking the Repeater 53
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Checking the Surge Protector 53
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Checking the Communication Terminal Board 54
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Checking Communication Faults *55
Ordering Instructions 57
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Johnson Controls Code Numbers 57
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Vendor Code Numbers *57
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Repair Parts *58
* Indicates those sections where changes have occurred since the last printing.