SR-2108FA-4CH is an industrial level constant voltage DMX512 & RDM controller which features full support to the latest DMX512, DMX512(1990), DMX512-A and RDM V1.0 (E1.20 – 2006 ESTA Standard) protocols. The RDM controller is designed with 5 channels, 5A per channel constant voltage output and available in 12VDC, 24VDC and 36VDC.The DMX LED controller is designed with easy connection terminals without screws. RDM bi-direction communication function enables the DMX512 master console to detect and display decoder information and set DMX address. A variety of features can be set via the visible numeric digital display and the buttons such as DMX address, output channel quantity, PWM output resolution (8 bit or 16 bit), PWM output frequency, GAMMA ray dimming curve value and DMX decoding mode. There are total 4 PWM output channels with common anode and DMX channel quantity can be settable from 1CH to 4CH. DMX address can be set and displayed via the numeric digital display. High frequency 16bit and low frequency 8bit PWM output resolution are available and switchable, and default setting is 16bit. 10 levels of PWM output frequency are optional from 500Hz-30kHz, default setting is 1kHz. Gamma ray dimming curve value is adjustable from 0.1-9.9, and logarithmic dimming and linear dimming are optional. DMX Decoding modes are optional and enable to adjust brightness of each output channel, master brightness of all output channels and strobe effects, and default mode is dp1.1.