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| Key features (mechanical and electrical)
 | | Sturdy dimmer cabinet with a footprint of only 600 x 600mm for 18 dimmer modules
| | Easy installation and connector access from the front due to the cabinet's 19" swivel frame
| | Plug-in dimmer modules with three power ratings of 3kVA, 5.7kVA or 11.5kVA
| | Cabinets can be equipped with a variety of modules of different types and loads
| | Mains switch and residual current device for each dimmer rack are fitted as standard
| | Key features (control)
| | All dimmers are fitted with current sensing and fault feedback functions via Ethernet as standard
| | Load check, control checking and fault indication with LEDs for each dimmer circuit
| | Two independent signal inputs via Ethernet and/or DMX with individual patch
| | LTP-, HTP- and backup link of the control input possible
| | Two separate DMX inputs A + B with DMX Thru output for additional cabinets
| | Conversion and output of two DMX lines when controlled via Ethernet
| | Second processor as a synchronous backup system available as an option
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dimMA – Digital dimming system for permanent installations
With the innovative digital dimming system dimMA, the well-known reliability of the MA touring dimmers is also available for permanent installations. The MA installation dimming system makes use of 19" rack cabinets made by the renowned manufacturer Rittal. They have a foot print of only 0.36 m˛ and can therefore be packed tightly. All connections, incoming and outgoing lines are located inside the cabinet. A swivel frame which operates similar to a huge front door provides easy and convenient access from the front. Any additional load terminals or patch fields are therefore redundant. Power feed and outgoing cables can either be routed from the top or the bottom of the cabinet.
Rugged cabinet construction
The swivel-frame cabinet with its 18 plug-in slots (i.e. max. 72 x 3kVA) can be fitted with modules of 4 x 3kVA, 2 x 5.7kVA or 1 x 11.5kVA loads. Each rack can be populated with modules of different types. Dimmer modules are available with different rise times to meet special technical needs. All modules of one powerstage fit into one carrier. Thus, all modules, i. e. switch modules of one powerstage, can be replaced without the need of additonal installation work. The huge number of available options enables the configuration of dimming systems, which meet almost any specification and customers’ demands.
For feeding (TN-S net), a three-phase bus-bar system with a load capacity of 400A per phase is integrated. Upon request, the cabinets can be equipped with special components such as mains switches, additional parallel output terminals and RCDs per circuit.
Dimmer modules
The plug-in modules for the dimMA Digital Dimmer system are available with load ratings of 4 x 3kVA, 2 x 5.7kVA or 1 x 11.5kVA. The dimmer modules are available with rise times from 260µs to 400µs (or 370µs) and up to 720µs depending on the load rating. This allows us to offer the optimal solution for every kind of application while also taking economic aspects into consideration. Each dimmer module features a separate single-board computer with power supply and communicates with the MA NDP (Network Dimmer Processor) of the cabinet via a CAN-bus interface. Dimmer modules of the same rating may be freely exchanged; any assigned settings such as dimmer number, dimming curve, non-dimming operation, and special and/or panic functions remain linked to plug-in slot and apply to any new module inserted. Each module is cooled with a temperature-controlled fan activated only, if the module is actually in use. This reduces drastically the amount of noise produced by the dimming system because only those components are cooled that need cooling. Via the MA NDP, each dimmer circuit provides the lighting control system with detailed information about current and voltage, the status of the connected load and about any faults occurring.
Module racks
All dimmer modules are designed as plug-ins, separated by phase and mounted in 19" racks with separate feeds for three modules at a time. Each rack (a maximum of six racks per cabinet is possible) is equipped with a combined mains fuse and switch and a residual current device (RCD) as standard. If multicore cables are connected, the rack's RCDs are configured to shut off commonly when tripped.
Replacing dimmer modules during operation or switching off individual groups of dimmers is therefore possible and permitted without shutting off the entire cabinet.
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