MICROPLEX MULTIPLEX CONTROL WIRING
Microplex is the control protocol used on most NSI lighting consoles. This system uses a single three conductor cable to transmit
up to 128 channels of dimmer control. For short distances (50 feet or less) a standard microphone cable may be used to carry both
the control signal and the DC power source for NSI control consoles. Longer distances may be accommodated with 18 gauge or
better cable to reduce voltage losses of the power supply.
Connect the Microplex control cable to either of the three pin XLR jacks. Since both jacks are wired in parallel, another control
cable may be connected between the remaining jack and another dimmer pack. Many dimmer packs may be ‘‘daisy chained’’
together in this manner.
Be sure to set the Channel Address dip switch as required (see MPX ADDRESS SWITCH SETTINGS).
ANALOG 0 - 10 VDC CONTROL WIRING.
Each of the dimmer channels of the NSI DDS rack dimmer pack may be operated by an analog 0 - 10 VDC control voltage. This
type of control will provide 0% intensity at 0 volts and 100% intensity at 10 volts. Any or all of the DDS rack dimmer channels
may be operated in this manner simultaneously with any multiplex control input. Each dimmer will respond to the greater of any
control inputs.
The analog control input uses a standard 9 pin ‘‘D’’ connector which is available from most electronics and computer supply houses.
Connect each of the positive channel control wires to the desired dimmer channel input pins (see diagram below) of the plug.
Connect the common (ground) control wire to the pin indicated on the diagram. Consult the documentation of the analog control
console or device you are using for the proper connections. The control input impedance is 4.7K ohms.
When using analog inputs, Dipswitch #10 should be in the up position to disable Channel Level Memory.
DDS 86/88/96/9800 DIMMER PACKS
INSTALLATION AND OPERATION GUIDE
Software Revision 1.41, Version C UL, Mfg Q3/96, and above
MICROPLEX MULTIPLEX CONTROL WIRING
NSI CORPORATION
5
