Configuration And Programming; Overview; Dimmer Configuration In The Field; Basic Dual Dimmer Module Di21-120U - Leviton DMX-512 Installation And Operating Manual

Configuration and Programming

Leviton MDS Dimmer Cabinets with Luma-Net Control

Overview

The Leviton MDS Digital Dimmer Cabinet uses an intelligent central control card
(Digital Main Control Module), enabling the dimmers in this system to dim and
control virtually any incandescent or fluorescent lighting load. It is possible to use
three different types of control input signals to this control card. Leviton prepares
complete and detailed submittal drawings for each dimming system order, and
requires approval of these prints for each job before it is released to production.
The factory installs the correct basic dimmer module in each slot, and programs it
for the correct functionality.
One basic dimmer (called the "Universal" dimmer) can be programmed to drive a
number of different load types. By referring to the electrical prints sent out,
checked, approved, and returned by the installing electrical contractor, the factory
programs each dimmer slot to correctly drive the load that will be connected to
each load terminal in the dimmer cabinet.

Dimmer Configuration in the Field

If the loads fed by the dimmer cabinet change, you must modify the dimmer
cabinet to accommodate the changing load type. Changing a circuit from
incandescent to fluorescent lights would require this type of modification.

Basic Dual Dimmer Module DI21-120U

The DI21-120U dimmer is capable of driving:
• Regular incandescent, quartz, quartz halogen, tungsten argon and similar lamp
loads
• Stepdown transformers to operate low voltage incandescent lamp types
• Certain electronic stepdown transformers (Check exact types for compatibility)
• Neon and cold cathode transformers, of the low power factor type
• Fluorescent dimmer ballasts requiring 0 VDC to +10 VDC control signals The
dimmer here acts as an on/off contactor and the 10 VDC control comes from
the control board in the dimmer.
• Fluorescent dimmer ballasts using two wires for both power and control using
the Advance Mark X dimmer ballasts
• Fluorescent dimmer ballasts using two wires for both power and control using
the Lutron TuWire ballasts
• Non-dim loads that need to be only turned on and off by the module, not
dimmed
• Dimmed loads that require complete turn off at some point (done by correctly
programming each dimmer slot for the load that is to be connected)
There are many different types and brands of fluorescent dimming ballasts; many
of these require different types of dimmers, modules, and control configurations.
If the dimmer ballasts found on a job site are different than the system was
designed to drive, it is necessary to check with the factory. We can assist you in
verifying whether the existing dimmer will drive this ballast, or whether we
suggest changes to accommodate the different ballast type.
Installation and Operating Guide
Page 11 of 18
18