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Access our full support library for setup, troubleshooting, system integration, cross-reference for discontinued competitor products, get warranty information, and more!
Don’t know where to get started? Come over to our exclusive Project Planner to get recommendations for Lightronics solutions specific to your needs!
Looking to engage with the Lightronics team face to face or connect with one of our approved dealers at a local event? Take a look at our calendar!
Lightronics has been manufacturing reliable lighting solutions for over 40 years. Learn more about our History, Values, and Employment Opportunities here!

The CM121-R is a 19-inch, 2-space, 400-amp single-phase Cam Lock power input panel featuring two male line connectors and female neutral and ground connectors for compatible portable theatrical and touring dimmer rack systems.
| Weight | 8 lbs |
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| Dimensions | 10 × 11 × 11.4 in |
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(What discontinued products are comparable to this product?)
The Lightronics CM121-R is a 400-amp single-phase Cam Lock power input panel designed for installation in 19-inch custom dimmer racks. Occupying two rack spaces, the panel features two male line connectors with female neutral and ground connectors, providing a reversed neutral and ground configuration compared to the standard CM121 input panel.
This arrangement accommodates compatible temporary power distribution systems requiring reversed neutral and ground connector orientations. It is suited for specialized equipment configurations used in theatrical productions, concert tours, and live stage performances where portable dimmer racks must interface with compatible power distribution equipment.
Designed for custom dimmer rack road cases, the CM121-R provides an organized power input interface that supports correctly matched equipment connections and efficient deployment in professional touring and theatrical lighting systems.