DMX-512 multiplex control wiring.
DMX 512 is the United States Institute of Theater Technology (USITT) standard for the digital control of dimmers. NSI DDS relay
products can be converted from Microplex to DMX 512 digital multiplex with a simple kit available from your dealer.
DMX-512 is the preferred type of control wiring when many relay or pack channels are used, because of the high update rate and
the resistance to interference. It is recommended in locations subject to electrical noise. DMX-512 only requires 3 wires to transmit
lighting levels for as many as 512 relay or dimmer channels. Most of the NSI lighting control consoles can optionally use this
interface.
Connect the DMX 512 cable from the control console to the male input connector. Another cable may be connected from the
female connector to the male connector on another pack. Many relay packs may be "daisy chained" or connected together in this
manner.
Be sure to set the Channel Address dipswitch as required (see DIPSWITCH SETTINGS).
LED INDICATORS
The front panel indicator LEDs indicate the status of the relay.
•
RED - Indicates the firing card is receiving DC power.
•
GREEN - Steady indicates a multiplex control signal is being received.
•
YELLOW - Indicates a respective relay channel is active.
AUTO LAMP TEST
Whenever dipswitch #8 is in the off (down) position and there is no multiplex signal detected, all channel outputs will come to full
intensity.
CHANNEL FUSES
Each channel is protected by a fuse to help prevent overload and damage to the power control devices used in the relay. Be sure
to replace the fuse with the same type and rating. Replacement with the wrong fuse is dangerous and will void your warranty.
Note: Lamps may sometimes cause a temporary "short-circuit" when the filament burns out and cause the fuse to blow.
This is normal and protects the internal relay circuitry from damage.
INSTALLATION and OPERATION TIPS
Care should always be taken to:
1) Keep all AC wiring away from control wiring.
2) We also recommend power up and performance checks be done one unit at a time. This can be a real time saver should problems
arise thus eliminating unnecessary isolation techniques to resolve problems.
DDS 3600R RELAY PACK
DMX-512 multiplex control wiring.
Software Revision 1.0, Version C UL Versions
4
NSI CORPORATION
