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General| Brand | Johnson Controls |
|---|---|
| Model | Metasys N2 |
| Category | Cables and connectors |
| Language | English |
Details the application and purpose of the N2 Communications Bus.
Explains working principles, communication types, and priority levels of the N2 Bus.
Lists and describes essential hardware components for the N2 Bus system.
Covers space, environment, and power requirements for N2 Bus installation.
Discusses cable selection, bus rules, line length, and device limits for N2 Bus design.
Provides guidelines to optimize N2 Bus performance and reduce traffic.
Details technical specifications of the N2 Communications Bus, including components and limits.
Important considerations before installing N2 Bus wiring, including codes and wire handling.
Illustrates various N2 Bus network configurations, including standard, repeater, and fiber layouts.
Provides instructions and rules for wiring the N2 Bus to the NCU and NEU.
Explains how to wire Application Specific Controllers (ASCs) to the N2 Bus.
Details how to install N2 Bus repeaters in station, branch, and star configurations.
Covers the installation and connection of fiber optic modems for N2 Bus communication.
Explains how to properly set End-of-Line (EOL) terminations for N2 Bus devices.
Recommends and describes the installation of surge protectors for N2 Bus wiring between buildings.
Details how to configure the N2 Submodule channel select switch on NCM101/102 for N2 Bus communication.
Introduces checking and modifying N2 Bus wiring and troubleshooting communication issues.
Verifies correct N2 Bus installation, wiring, polarity, and component settings.
Covers adding, deleting, or relocating N2 devices on an operating N2 Bus.
Discusses common N2 Bus communication problems and troubleshooting tools like DVMs and oscilloscopes.
Explains how to check for broken or frayed wires that can cause devices to go offline.
Verifies correct cable termination and connections to N2 Bus terminals for proper function.
Ensures correct configuration of End-of-Line (EOL) settings on devices to prevent signal reflections.
Confirms the N2 Bus submodule channel select switch is set correctly for N2 devices.
Identifies issues with individual N2 devices, such as shorts or incorrect address settings.
Verifies that the number of devices on the N2 Bus does not exceed its capacity.
Ensures the N2 Bus length does not exceed recommended limits to maintain communication.
Detects and eliminates improper T or Y connections that cause signal reflections.
Identifies and corrects ground loops that disrupt N2 Bus communications.
Troubleshoots issues related to defective N2 Bus repeaters.
Diagnoses problems caused by incorrectly wired or defective surge protectors on the N2 Bus.
Inspects fuses on the communication terminal board for blown fuses that may cause communication failure.
Uses an oscilloscope to pinpoint communication faults by analyzing N2 Bus signal patterns.
Lists product code numbers for Johnson Controls components related to the N2 Bus.
Provides code numbers and manufacturers for vendor-supplied N2 Bus components.
Lists Metasys order numbers for common N2 Bus components like submodules and terminal boards.
