rayrun SD20 PLC Master Slave Programmable LED Driver User Guide
- June 3, 2024
- RayRun
Table of Contents
rayrun SD20 PLC Master Slave Programmable LED Driver
Introduction
SD20 is a LED driver powered by 48Vdc with power line communication commands. With the compatible master driver, it can drive LED lights in voltage range of 0-48V and current range of 0-700mA. With the digital PLC commands from master driver, the output current, gradient speed, current trimming functions are adjustable from the master driver. With the advanced full DC dimming scheme, it’s 100% physically flicker-free in whole dimming range. It also has very good low brightness performance, to build elegant low brightness environment and on/off dimming experience.
Function & Size
Power supply input
Connect to master driver’s 48Vdc output power, get power and PLC commands from
master. Please make sure the polarity is correct.
LED output
Connect to constant current driving LED lights. The output current is
programmable from the master driver and the current range is from 0 to 700mA,
the output voltage is from 0 to 48Vdc. Please make sure the lighting fixture’s
voltage and current is in this range.
Indicator
The indicator will light on when the LED driveris powered on. The input power
will be fully cut off if the indicator is off.
INSTALLATION
Install steps
- Only use the slave driver with compatible master driver, do not use with any other power supply.
- Connect the slave drivers’ output to LED light.
- Connect the master driver’s output cable to all slave drivers’ power input. Please make sure the polarity is Correct.
- Make sure the master driver’s LED current setting is correct, then connect the master driver’s AC power.
CAUTION: Do not short any cable to AC power! Do not connect the power input to any incompatible drivers!
Automatic LED adaption
The driver verifies the load character on each power on. It will run a load
adaption process once the change of load is detected. During the adaption
process, the lighting fixture will dim up and down for about 10 seconds. After
this process, the driver will match the LED feature and maintain a 0-100% full
range physical non-flickering DC dimming. Normally this adaption process
happens on the power on moment once the lighting fixture is changed with the
brightness of higher than 30%.
CAUTION: The adaption process CAN NOT detect the value of LED rated current, so the rated current MUST be set correctly from the master driver before connecting to lighting fixture. Otherwise the lighting fixture can be permanently damaged!
Advanced features
Output current option
The output current can be set from the master driver via power cable, the
maximum current value is 700mA. Please refer to the master driver’s
instruction for detailed operation. The maximum output voltage and wattage is
related to the output current setting, following table shows the relation
between the current and the voltage/ wattage.
Output current trimming
Besides the output current setting, the output current also can be trimmed
down in a resolution of 1%. With this feature, the LED current and light
luminance can be matched preciously. Please refer to the master driver’s
instruction for detailed operation.
Gradient speed adjust
The light on/off gradient speed is also adjustable from the master driver.
Please refer to the master driver’s instructions for detailed operation.
Working at low brightness
To extend the application at low brightness, the output brightness is designed
to rather lower at low brightness levels. The output brightness will be
nonlinear to the relevant brightness level below a certain point. This point
will be around 2% to 12%, related to rated current and trim value ([refer to
following curve). The driver will maintain linear DC driving mode at low
brightness, no need to concern about PWM modulation issues.
Waterproof (-S version)
The IP-68 waterproof feature with glue injection finish is available on -S
version. For overall waterproof performance, the cables must be waterproof
treated separately.
Specification
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