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Terminology

Understanding these terms will help you make the most of this guide.

nLight device - An intelligent digital device having the ability to

communicate over an nLight network. Device types include occupancy

sensors, photocells, power/relay packs, wall switches, dimmers and panels.

Blink Codes – nLight devices show status and diagnostic codes by blinking

their LED(s) in defined patterns.

CAT-5e – network cable to connect nLight devices. The T568B wiring

standard is recommended for the order of conductors in the cable terminator

(plug).

RJ 45 – Physical standard describing the mating connectors used on CAT-5e

cabling in both nLight 485 Bus networks and IEEE 802.3 Ethernet networks.

485 Bus – the CAT-5e cable connecting the devices in an nLight Control

Zone. The bus enables communications between devices using the TIA-485

Standard and carries low-voltage DC operating power for the devices.

Lighting Zone – A group of lights wired or configured to operate together.

Control Zone – A collection of nLight devices and/or nLight-enabled

luminaires that function together in order to control a space's lighting.

Typically, one control zone per room is used, however large areas (such as

warehouses) may require multiple zones. Zones can also be subdivided via

configuration to cover several small rooms.

Out of the Box - It Just Works

nLight devices ship with default settings so that they simply work, right

out of the box. With as little as a switch or sensor and a Power Pack wired to

lights, you can create a perfectly functional nLight Control Zone.

Consider a simple office with an nPODM wall switch and a Power Pack

wired to the room's light fixture. The nPODM broadcasts switch status

(ON/OFF) on Channel 1, and the Power Pack tracks (obeys) switch status

changes on Channel 1. Right out of the box, the nPODM can control the

room's lighting.

This table shows default Broadcast (status) channels for a sampling of

nLight WallPod switches, and default Tracking (listening) channels for

common Power Pack devices; devices with 2P or 4P indicate multiple poles.

Device

nPODM

nPODM 2P

nPODM 4P

nPP16

nSP16

nSP5 2P

Occupancy Channel (default) - All sensors broadcast on Channel 1.

All devices tracking, track Occupancy Channel 1.

Photocell Channel (default) - All sensors broadcast on Channel 1.

All devices tracking, track Photocell Channel 1.

Defaults

Broadcast

Occupancy

Channel 1

Photocell

Channel 1

Switch Channel

Track

Channel 1

Backbone – The communication network formed by nLight Bridges and

Gateway devices that is required to deploy remote or time-based changes,

such as a scheduled override, out to a device, groups of devices, or zone(s).

Additionally, advanced features, such as performance monitoring and

interfacing with higher level BMS systems, require the end-to-end network

connectivity that the backbone provides.

Bridge (nBRG 8) – nLight backbone device with 8 RJ-45 ports to

connect control zones, other Bridges, or a Gateway. Bridges act as hubs

by aggregating communication traffic from connected zones onto the

backbone. Bridges also act as routers by forwarding information from the

backbone out to the applicable zones. Additionally, Bridges combine system

power from zones that are net contributors of power and distribute it to

zones that are net consumers of power.

Gateway – An nLight backbone device that maintains a database of all

downstream nLight devices, provides time clock functionality, stores custom

operating profiles, and displays system status. Gateways also link an nLight

backbone to the host computer of the SensorView Management software

via an Ethernet LAN/WAN network. The Gateway consists of a touch screen

display (nGWY2 GFX), controller (nGWY2 CTRL), and power supply (PS 250).

WallPod® (or nPODM) – general term for an nLight wall station. WallPods

are available in many configurations that enable occupants to issue On,

Off, Raise, Lower, and/or Scene selection commands. WallPods have model

numbers that start with nPOD(M).

nLight Power Considerations

Each nLight zone supports up to 128 devices. Some devices provide power,

others consume it. Most nLight devices use only 3-4 mA, some up to ~8mA;

nLight power generating devices typically provide 30-40 mA per RJ-45 port.

For nLight zones with more than 6 or 8 devices, you should carefully budget

power consumption to ensure that all devices have adequate power. Device

data sheets give accurate power generation or consumption values.

Tips to avoid Low Voltage in a Zone

• Remember that nLight device placement is flexible. Locate Power

Packs mid-Zone. Ex: in an 11-device Zone, place Power Pack as device

#6. Each side of the Power Pack offers 40mA, or 8mA per device. If the

Power Pack were device #1 or #11, less power is available per device.

• Calculate the power load and make sure there are enough power-

supplying devices placed appropriately in the Zone.

• A Bridge can redistribute power from Zones with a surplus to Zones

with a deficit. When coupled with a PS150 supply, a Bridge has

~90mA available to share with connected Zones that need power.

• If a Bridge is accessible, consider splitting heavily-loaded Zones into

multiple Zones with lower device counts.

The illustration below shows how a Bridge can share power with Zones that

need it, as well as re-distribute power from Zones with excess voltage.

nPP16

40mA

nPS80

40mA

nPP16

40mA

~90mA

for Bridge

40mA

208mA

available to share

among ports

40mA

38mA

40mA max