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The MD424 modular dimmer is the "muscle" of the modular system — an expandable heavy-duty, 4 channel, 2.4kW rack mount unit. The MD424 mounts in any 19" rack cabinet. Expand from 4 channels to 72 or more. Works in conjunction with the MD-CTRL DMX and Analog Interface module. DM424 Features Rack mountable (standard 19" cabinet rack) Three phase 120/208 VAC or single phase 120/240 VAC power input 4 to 72 channels at 2.4kW per channel DMX-512 and analog 0 to +10 VDC control inputs, highest takes precedence Signal present and over temperature indicators 20 amp high magnetic circuit breakers Dual 40 amp solid state relay modules Large 450μs risetime filter chokes Powerpole input and terminal output from dimmer panels Quick connect & disconnect control headers on ribbon cables

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