www.ams.com AS7221 SLIK User Guide – 3.2.02 page 1/14
AS7221 Smart Lighting
Integration Kit (SLIK)
User Guide
Network-Enabled Smart Lighting
Technology for White Color Tuning
Applications
Enabling the Internet of Awareness™
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 2/14
Table of Contents
1 AS7221 SLIK Overview .................................................................................................................... 3
2 AS7221 SLIK (v3.2) Overview .......................................................................................................... 4
2.1 Constant Current Integration Kit .................................................................................................... 5
2.2 AS7221 SLIK - Constant Current Configuration w/UART Network Interface ................................ 5
2.3 AS7221 SLIK - Constant Current Configuration w/Bluetooth Network Interface .......................... 7
2.4 Configuring the AS7221 SLIK for PWM1 Digital Deep Dimming .................................................. 8
3 AS7221 SLIK - Operation ................................................................................................................. 8
3.1 AS7221 SLIK – Adding Daylighting Control via I2C using the AS4531 ....................................... 10
Constant Current Configuration ......................................................................................................... 10
Appendix A: AS7221 Block Diagram ................................................................................................. 11
Appendix B: AS7221 SLIK (v3.2) Schematic .................................................................................... 12
Revision History
Revision
Date
Owner
Description
3.2.01
14 Sept 2015
KH
Initial AS7221 User Guide for 3v2 assembly
3.2.02
27 Jan 2016
KH
Updated AS7221 MODE settings
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 3/14
1 AS7221 SLIK Overview
The AS7221 Smart Lighting Integration Kit (SLIK) is a complete color tuning luminaire reference design
solution, built around the ams AS7221 Network-Enabled Smart Lighting Manager.
The AS7221 SLIK is built from three interconnected modules: an AS7221 module, a Bluetooth module
and an LED module with two strings of white LEDs for tuning (warm and cool). It is shipped with the
LED module removed and mounted on the AS7221 module to allow for diffusion and sensing of the
LED light by the AS7221. For operation of the SLIK as shipped, which includes a diffuser, refer to the
ams Dashboard software and documentation which is also included on the SLIK USB memory stick.
The AS7221 SLIK can also be used with only one or two of the modules, depending on usage. Such
operation is described in this document.
Note that this SLIK user guide document applies to the AS7221 SLIK 3v2 board assembly.
In the AS7221 SLIK box
A fully assembled three-module AS7221 SLIK (3v2 assembly)
Optional AS4531 assembly for adding Daylighting operation to the AS7221 SLIK
SLIK AC/DC 12V power supply (including US plug adapter, as required)
USB cable assembly for installation into the SLIK (for serial UART interface dashboard
connectivity)
USB stick containing SLIK User Guide (this document), ams Spectral Sensor Dashboard
software and associated user guide, and the latest AS7221 device datasheet
Powering up SLIK
The AS7221 SLIK will power up with the following default factory settings:
Assumes 12VIN operation with AS7221 factory MODE setting (MODE = 0)
Color Tuning is enabled
External dimming control is enabled
External occupancy control input is in standby, but automatically enables upon first usage
Computer communication, for AS7221 Dashboard operation, is done using the ams provided
USB cable which is installed into SLIK after installing software from the USB stick. This USB
interface should not be used if using the Bluetooth module (which requires an ams smartphone
app)
The SLIK module configuration is not electrically isolated. Care should be taken to place the module
in the appropriate position to meet electrical and physical safety requirements as set forth in
international standards.
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 4/14
2 AS7221 SLIK (v3.2) Overview
The AS7221 Smart Lighting Integration Kit (SLIK) is a complete smart color luminaire reference design
solution built around the ams AS7221 Smart Lighting Manager. As shown in the figure below, SLIK
consists of three interconnected modules. The modules are scribed and can be separated as needed
for compatibility with various luminaire control architectures.
The SLIK LED Array module is in fact scribed and removed, then mounted on the AS7221 Smart
Lighting Manager module before shipment to allow easy operation of an external diffuser for color
tuning of the LED array by the AS7221 device.
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 5/14
2.1 Constant Current Integration Kit
SLIK - Constant Current Luminaire Connections
2.2 AS7221 SLIK - Constant Current Configuration w/UART Network Interface
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 6/14
SLIK
Connection
Connection Description
Connection Type
DIM
0-10V input for Luminaire dimming control from an external
dimmer. Dimming range to the Luminaire is from 100% (no
dimming) to 10% dimming.
Local Control Inputs
GND (Grey)
Ground return for external dimmer
OCCN
Digital input for occupancy detection from an external sensor
GND
Ground return for external OCC sensor.
TX
UART Transmit
Serial UART Interface
RX
UART Receive
GND (-)
UART Interface Ground
3.3V (+)
Power output from SLIK (<50mA)
SLC
I2C clock
External Sensor Port
SDA
I2C data
GND (-)
I2C interface ground
VDD (+)
I2C interface power (3.3V) provided by SLIK
PWM1 (or 0-
10V_O)
Used for control of an external Ballast or LED Driver
LED Driver Dimming Control
PWM2, PWM3
Current steered PWM outputs, FET buffered
Digital Color PWM Controls
GND
Ground return for VIN
DC Power Inputs
VIN
12VDC ±10% input which powers the entire SLIK assembly (from
Ballast/LED Driver).
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 7/14
2.3 AS7221 SLIK - Constant Current Configuration w/Bluetooth Network Interface
SLIK
Connection
Connection Description
Connection Type
DIM
0-10V input for Luminaire dimming control from an external
dimmer. Dimming range to the Luminaire is from 100% (no
dimming) to 10% dimming.
Local Control Inputs
GND (Grey)
Ground return for external dimmer
OCCN
Digital input for occupancy detection from an external sensor
GND
Ground return for external OCC sensor.
SLC
I2C clock
External Sensor Port
SDA
I2C data
GND (-)
I2C interface ground
VDD (+)
I2C interface power (3.3V) provided by SLIK
PWM1 (or 0-
10V_O)
Used for control of an external Ballast or LED Driver
LED Driver Dimming Control
PWM2, PWM3
Current steered PWM outputs, FET buffered
Digital Color PWM Controls
GND
Ground return for VIN
DC Power Inputs
VIN
12VDC ±10% input which powers the entire SLIK assembly (from
Ballast/LED Driver).
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 8/14
2.4 Configuring the AS7221 SLIK for PWM1 Digital Deep Dimming
Provide a VIN of 12V ±5%
o As shown in the figure above, SLIK regulates the AC/DC LED Driver Aux output
o Or, a 12V AC/DC wall brick converter (not shown above) could also be used in place of
the 12V LED Driver power. Connect to the 12V factory shipped AC/DC power unit
connection.
Set the AS7221 MODE pin resistor setting for 10V Digital PWM dimming (range is 1-100%,
enabling deep dimming).
3 AS7221 SLIK - Operation
When a SLIK-controlled luminaire is turned off by SLIK (via the Smart Lighting Command Interface,
SLIK dimming or SLIK occupancy sensor), the most recent color temperature target setting, LUX target
setting and dimming input level are saved. After power is restored (by SLIK control or AC/DC power-up)
the luminaire will begin operation at the stored levels.
Automatic SLIK Color Tuning Compensation
When automatic color tuning compensation is enabled, the PWM2 and PWM3 output controls are
slaved to the AS7221 color sensors. As changes to internal Luminaire light color is detected (or color
target changed by the Smart Lighting Interface) those outputs will be automatically adjusted to maintain
a constant CCT color.
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 9/14
White Color (XYZ) tuning can be enabled or disabled via commands from the Smart Lighting Command
Interface (serial UART), for example over Bluetooth from a Smartphone with the appropriate SLIK
application installed. Default for the SLIK is to be enabled.
SLIK Dimming Operation
Local dimming of SLIK is controlled by an external 0-10V dimmer or by the Smart Lighting Command
Interface. The 0-10V dimming input allows the luminaire output to vary from 10% to 100%. The Smart
Lighting Command Interface can also dim the output from 1% to 100% using a digital PWM (0/10)
interface. Again refer to the AS7221 Data Sheet for more details.
TRIAC-based dimmers only affect the absolute max LUX setting of the luminaire, and do not affect
SLIK Smart Lighting Command Interface settings which implement changes in LUX percent (%). Note
that when using the factory shipped SLIK LED Array Daylighting Configuration, TRIAC based dimming
is not available as it is powered by a voltage source.
Setting SLIK Color target
Setting the target Color for the illuminated space is achieved via the Smart Lighting Command
Interface.
Connecting to the Occupancy Control
The SLIK Occupancy control input is placed in a standby state after any SLIK AC/DC power up. If an
external occupancy sensor is connected to SLIK (via the OCCN connection), and is pulsed low
continuously for at least 500ms indicating an occupant, the SLIK occupancy control input is
automatically activated, and begins a 10 minute countdown timer. As the timer counts down it is set
back up to 10 minutes by either: 1) The external occupancy 500ms sensor trigger, or 2) usage of the
SLIK external dimming sensor input.
Once the 10 minute occupancy timer expires, indicating no occupant, the luminaire is turned OFF using
a smooth dimming-down ramp. The luminaire will be turned back on by either: 1) The external
occupancy 500ms sensor trigger, or 2) usage of the SLIK external dimming sensor input.
The OCCN input uses digital input thresholds (0/VDD). Usage of the occupancy sensor input is not
required for the other control inputs (Smart Lighting Command Interface or 0-10V dimming) to properly
operate.
USB Computer Interface and Dashboard Software Operation
The AS7221 SLIK uses its Tx/Rx interface to connect to a standard USB computer interface.
This is accomplished using application software and a serial to USB cable which plugs directly into SLIK,
both available from ams. Do not operate the built-in SLIK Bluetooth module and the SLIK external UART
interface (USB, etc.) at the same time.
The Dashboard software application uses the SLIK Smart Lighting Command Interface to let the user
observe and log AS7221 test data.
Please refer to the separate AS7221 SLIK Dashboard document for USB and Software installation/usage.
Bluetooth Module Operation
The AS7221 SLIK uses the AS7221 Tx/Rx interface to connect to the built in Bluetooth BLE module. This
is accomplished using application software available from ams. Do not operate the built-in SLIK Bluetooth
module and the external SLIK UART interface (USB, etc.) at the same time.
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 10/14
3.1 AS7221 SLIK – Adding Daylighting Control via I2C using the AS4531
Constant Current Configuration
As shown above, a Color Tuning AS7221 SLIK adds Daylighting with a simple inclusion of an AS4531
via I2C:
With this addition the Luminaire can concurrently control both Color Tuning and Daylighting
Color Tuning uses the AS7221 as both the Smart Lighting Manager and XYZ Color Sensor
Daylighting is accomplished by the AS4531 sensor which reports to the AS7221 Smart Lighting
Manager via I2C
The AS7221 is physically looking toward the internal Luminaire mixed color space
The AS4531 is physically looking toward the external Luminaire daylight space
Detection and operation of the AS4531 with the AS7221 is automatic
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 11/14
Appendix A: AS7221 Block Diagram
The block diagram below illustrates the control connectivity and functionality of the AS7221 Sensor-
Integrated Smart Daylighting Manager, which SLIK is built around.
Photopic
Sensors
I2C
Serial UART
Interface
(digital)
Cognitive
Light™
Engine
Occupancy
Interface
(digital)
Dimming
Interface
(0-10V)
LED Driver
AS7221 Smart Lighting Manager
SPI
ams
Sensors
E2PROM
External Sensor
Interface
PWM2
PWM3
Status Indicator
(LED)
Configuration
Update
Constant Current
or Constant
Voltage LED Driver
(with 0-10V or
PWM Dimming)
PWM1 or
0-10V Output
Smart Lighting
Command Interface
or
Internal Luminaire
Light (diffused)
AS7221 external interfaces:
External Sensor Port (I2C)
Local Control Inputs
Smart Lighting Command Interface (Bluetooth, Serial)
PWM Outputs
Additional AS7221 device documentation is also available from ams (contact www.ams.com):
AS7221 Datasheet
AS7221 User Guide
AS7221 Smart Lighting Command Set
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 12/14
Appendix B: AS7221 SLIK (v3.2) Schematic
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 13/14
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
www.ams.com AS7221 SLIK User Guide – 3.2.02 page 14/14
About ams
ams makes intelligent optoelectronic solutions for a variety of markets covering lighting, smartphones,
displays, medical and industrial applications, and offers intelligent SLC devices optimized for lighting
applications. For more information, visit www.ams.com
