GE Industrial Solutions A Series Lighting Control Panelboards ASRGLCDOK - Manual (Page 2)

Introduction
This manual provides basic overview and setup
information for the Daylight Optimization Module. It
includes an overview of the Daylight Optimization Module
board and a typical setup.
The Daylight Optimization Module is designed to take
advantage of natural sunlight and other ambient light to
conserve power delivered to indoor lights. Once a setpoint
light value has been established for a given bank of lights,
the Daylight Optimization Module maintains that amount
of light in the area. The Daylight Optimization Module
uses sunlight harvesting; it measures the amount of light
in an area with a photodiode and adjusts the dimming
ballast to maintain the desired amount of light in the
area.
Network Configuration
The Daylight Optimization Module is a subnet device of
the Lighting Controller LINKnet device. Communication
is via the connection from NET1 on the Daylight
Optimization Module to NET2 on the Lighting
Controller, as illustrated in Figure 1.
Figure 1. Lighting Controller and Daylight Optimization Module configuration.
Specifications
The dimming module has the following hardware
features, as illustrated in Figure 2:
• Selectable DIP switch for the LINKnet address
• Power and communications connections
• Eight photocell inputs
• Eight input sensitivity potentiometers
• Eight 1 V to 10 V, <0.5 mA dimming ballast
control outputs
Figure 2. Daylight Optimization Module circuit board layout.
Power
The Daylight Optimization Module is a half-wave rectified
device that requires a 15 VA, 24 Vac Class 2 transformer.
Using a transformer to power a Daylight Optimization
Module device and a full-wave rectified device could cause
serious electrical damage. A single transformer should
only power multiples of the same device type, without
exceeding the VA rating of the transformer. When
multiple devices share a transformer, always ensure a
GND-to-GND connection for all devices connected to the
transformer.
Communication
The Daylight Optimization Module communicates with
the lighting Controller over an RS-485 subnetwork
connection. A maximum of eight RS-485 subnet devices
can be connected to one Lighting Controller. For correct
operation, each subnet expansion module requires a
unique address. To wire an RS-485 connection, use 18-
gauge twisted-pair wire, which will support
communication lengths of up to 4000 ft.
Addressing
Each subnet device requires a different address from any
other expansion module connected to a given Lighting
Controller. The valid range of addresses is 1–12, with 1
reserved as the address of the standard input expansion
module and 12 as the address of the Handheld
Programmer. The factory default address for the Daylight
Optimization Module is 6. In the default database,
dimming is set up for addresses 6 and 7. It is highly
recommended that only address 6 or 7 be used for a
Daylight Optimization Module.
Inputs
The Daylight Optimization Module has eight photocell
inputs, connected as illustrated in Figure 3. Each input
has four pins: two supply power (PWR and GND), one for
the input (IP#), and the last for signal adjustment (ADJ).
Daylight
Optimization
Module
LINKnet
Lighting
Controller
Ethernet
LINKnet
Address DIP
Switch
Power and
Comm
Connections
Photocell
Inputs Input
Sensitivity
Potentiometers
Dimming Ballast
Control Outputs