Lehigh DX3 - DX3 Dimmer Racks

1 Introduction
The DX3 is a high performance fully digital dimming system capable of controlling up to 512
dimmers. It is designed for theatrical or architectural applications, or a combination of both.
This manual begins by introducing the DX3 system architecture as well as features and how they work.
Please refer to the DxDirector DX3 manual for details on how to set up and program all the features
into your rack.
1.1 DX3 Dimmer Racks
Typical DX3 Racks are shown in Figure 1. This shows the three size racks that characterize the DX3
family. The DX3-120 can hold up to 120 dimmers, the DX3-60 up to 60 dimmers and the DX3-30 up
to 30 dimmers. These dimmers can be a combination of regular phase control SCR dimmers, reverse
phase IGBT dimmers or non-dim relays. Most dimmer/non-dim modules are dual modules. Racks are
typically 3-phase, but can accommodate single phase. Both 120/208vac and 277/480vac rack systems
are available.
DX3 Manual 5
Figure 1: DX3 Dimmer Racks
10 / 100
Ethernet
1
7
*
4 6
3
#
9
DMX A
DMX B
2
5
O
8
Mode
Station
10 / 100
Ethernet Mode
Station
6
3
#
9
2
5
O
8
1
7
*
4
DMX A
DMX B10 / 100
Ethernet Mode
Station
6
3
#
9
2
5
O
8
1
7
*
4
DMX A
DMX B