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Leviton NRD 8000 Operation Manual

Made by: Leviton
Type: Operation Manual
Category: Dimmer
Pages: 10
Size: 0.26 MB

 

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NRD 8000 

ADDRESSABLE 

DIMMER PACK 

OPERATION MANUAL 

 


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NSI NRD

 

8000 ADDRESSABLE DIMMER PACK 

INTRODUCTION 

The NSI NRD 8000 is a rack mountable eight channel dimmer system that provides 1200 
watts per channel or a maximum power capacity of 9,600 watts. 

The NRD 8000 is fully user addressable allowing assignment of up to eight of a possible 
128 channels. Microplex technology developed by NSI for the stage lighting industry, is 
the electrical marriage of microprocessor technology with digitally controlled 
multiplexing. This technology allows all NSI Lighting components to be connected with 
standard three conductor microphone audio cables or even audio snakes.  System 
expansion is further simplified through the abi1ity to daisy chain additional dimmer packs 
to an existing system.  This application of microplex technology makes system set up and 
operation easy and convenient.  In addition, NSI Products are compatible with most other 
manufacturer’s lighting products, which use the same microphone cable interface. 

Our philosophy at NSI is to utilize only the highest quality components in the design and 
manufacturing of our products.  Problems that often plague dimmers such as flickering 
lights, buzzing in audio equipment, and triac failure are minimized in NSI products.  Each 
output of the NRD 8000 is fully filtered with industrial toroidal devices.  In place of triacs, 
NSI only uses professional grade dual SCR’s. 

You can be confident your NSI Dimmer Packs feature the best in performance and 
reliability standards available. 

 


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SPECIFICATIONS 

Eight 

No. of Channels: 

Power Output per Channel: 

1200 Watts 

Total Maximum Power Output : 

9,600 Watts 

Filtering: 

Serial Control System: 

Input Voltage To Response Time: 

Control Isolation: 

+ 15 V. DC -Available to Controller: 

Dimensions: 

HxWxD 

Mounting Spec. 

18 3/4 " 

NSI 

"Microplex" 

50 MSEC 

1200 Volt HV 

400 MA 

5 1/4" x 19" x 10 1/4" 

(from hole centers): 

(8) Toroidal Chokes 400 USEC. 

 


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Channels 

5/J2 

J1 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 
 
 
 
 

ADDRESSING 

Each NSI dimmer pack is fully user addressable to receive any of 128 possible control 
channels. Control channels may be assigned in increments of four by addressing the NRD 
8000 to receive them. To accomplish this simply position the address select switches as 
described in the following chart. 

Note:

 New Style units have six position dipswitches where as dipswitches 1-6 are 

indicated below.  Old style units are functionally the same but offered 4 position 
dipswitches.  Internal jumpers where as J1, J2 are indicated below. 

1-4 

Off 

Off 

Off 

Off 

Off 

N/A 

5-8 

On 

Off 

Off 

Off 

Off 

N/A 

9-12 

Off 

On 

Off 

Off 

Off 

N/A 

13-16 

On 

On 

Off 

Off 

Off 

N/A 

17-20 

Off 

Off 

On 

Off 

Off 

N/A 

21-24 

On 

Off 

On 

Off 

Off 

N/A 

25-28 

Off 

On 

On 

Off 

Off 

N/A 

29-32 

On 

On 

On 

Off 

Off 

N/A 

33-36 

Off  

Off 

Off 

On 

Off 

N/A 

37-40 

On 

Off 

Off 

On 

Off 

N/A 

41-44 

Off 

On 

Off 

On 

Off 

N/A 

45-48 

On 

On 

Off 

On 

Off 

N/A 

49-52 

Off 

Off 

On 

On 

Off 

N/A 

53-56 

On 

Off 

On 

On 

Off 

N/A 

57-60 

Off 

On 

On 

On 

Off 

N/A 

61-64 

On 

On 

On 

On 

Off 

N/A 

65-68 

Off 

Off 

Off 

Off 

On 

N/A 

69-72 

On 

Off 

Off 

Off 

On 

N/A 

73-76 

Off 

On 

Off 

Off 

On 

N/A 

77-80 

On 

On 

Off 

Off 

On 

N/A 

81-84 

Off 

Off 

On 

Off 

On 

N/A 

85-88 

On 

Off 

On 

Off 

On 

N/A 

89-92 

Off 

On 

On 

Off 

On 

N/A 

93-96 

On 

On 

On 

Off 

On 

N/A 

97-100 

Off 

Off 

Off 

On 

On 

N/A 

101-104 

On 

Off 

Off 

On 

On 

N/A 

105-108 

Off 

On 

Off 

On 

On 

N/A 

109-112 

On 

On 

Off 

On 

On 

N/A 

113-116 

Off 

Off 

On 

On 

On 

N/A 

117-120 

On 

Off 

On 

On 

On 

N/A 

121-124 

Off 

On 

On 

On 

On 

N/A 

125-128 

On 

On 

On 

On 

On 

N/A 

The NRD 8000 is actually two four channel dimmers coupled together to provide eight channels 
of dimming in a single rack mountable package.  Each group of four channels has its own 
address switches. These controls channels are addressed in increments of four as outlined in the 
chart above.  

IMPORTANT: All NSI dimmer packs are shipped from the factory addressed for channels 1 -4. Units must be 

readdressed (see chart above) before being capable of receiving any other channels. 

 


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AC OUTPUT RECEPTACLES 

Dual standard Leviton AC outlet receptacles are provided for each channel of the NRD 8000. These 
receptacles provide power to the lamps in your lighting system. The amount of power supplied to these 
outlets control the intensity of the lights they drive. Multiplexed signals received from your NSI 
controller are translated into power levels to achieve desired light intensity. Each dual receptacle 
corresponds to a single channel with the maximum power capabilities described in the specifications 
section of this manual. Under no circumstance should maximum recommended power capabilities be 
exceeded. Exceeding the rating 

may 

be hazardous and will void your warranty.  Most lamps, fixtures 

and rain lights may be connected to these outlets. 

Do 

not connect any other electrical appliances or 

equipment to the dimmer packs. 

MICROPLEX INPUTS 

Both male and female Microplex connectors may be used for input signals.  Mico-plex technology 
allows your system to be connected using standard microphone cables or even audio snakes.  
Digitally coded signals may be received from your NSI controller or another dimmer pack.  The 
Microplex system also provides D.C. phantom power to your controller.  Up to 128 individual 
control channels plus phantom power to your controller may be transmitter through a single 
microphone cable. 

MICROPLEX EXPANSION 

The male and female Microplex connectors are wired in parallel allowing either one to be used for 
input or output of control signals.  When used as an output, the Microplex connectors will provide 
control signals  to another dimmer pack.  This is called daisy chaining and makes expansion of 
your system easy.  Up to 128 individual control signals may be sent through NSI dimmer packs 
via a standard microphone cable. 

 


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CONTROL STATUS 

INDICATORS 

Individual yellow LED' s (Light Emitting Diodes) indicate when channels are active.  This feature is 
an excellent trouble shooting tool in identifying possible problems with signal transmissions or 
defective lamps and fixtures 

POWER ON INDICATOR

 

This green LED (Light Emitting Diode) will light whenever the dimmer pack is receiving AC power 
and functioning properly. 

AUTO TEST

 

This built-in function allows you to connect and test lamps at full intensity without the need of a 
controller.  When dipswitch 6 is off with a controller absent lamps will light to full intensity.  Internal 
jumper J1 is used in place of dipswitch 6 on 4 dipswitch units. 

CIRCUIT PROTECTION

 

The NRD 8000 is equipped with safety circuit interruption devices to ensure protection from 
overloading or shorted circuits.  The NRD 8000 utilizes resetable external circuit breakers for each 
individual channel as well as internal fusing. 

MOUNTING

 

The NSI NRD 8000 dimmer pack may be mounted in standard EIA 10” racks.  The NRD 8000 is 
provided with two mounting flanges or ears designed for securing to the rack mounting rails.  
Most standard rack rails are already properly drilled to accept mounting 19” EIA standards for 
industrial equipment, however in some cases you may need to drill holes to accommodate your 
dimmer pack.  When doing this ensure hole spacing is accurate before attempting to drill. 

WIRING FOR AC POWER

 

The NRD 8000 is equipped with a standard screw terminal connection to facilitate customer 
wiring for AC power. NSI recommends only qualified individuals with a knowledge of 
electricity attempt to wire the NRD 8000 to electrical power. NSI assumes no liability for 
personal injury, lamp failure, or other equipment damage when the unit is improperly 
connected to an electrical service or connected by unqualified personnel. 

It is important to verify wiring before connecting or energizing the service main. Mis-wiring 
may cause the 

3/10 

amp internal power supply fuses to blow. Circuit damage and blown lamps 

may also result from improper wiring. 

 


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NEUTRAL WIRE MUST BE CONNECTED TO BOTH NEUTRAL TERMINALS 

Double check for correct connection. 

ELECTRICAL SERVICE MUST BE FUSED AT 40 AMPS MAXIMUM 

NOTES: 

Amperage requirements of power service may be reduced for decreased maximum power 
(ie. 30 amps for 1000w/channel). 

The NRD 8000 may be connected to either of the following types of electrical power services as 
illustrated below. It is recommended that a suitable power connector and cable (such as a standard 
4 prong range or dryer plug) be attached to the unit for portable operation. 

The NRD 8000 is actually two 4 channel dimmers coupled together for the flexibility of eight 
independent channels in one rack mount package. The NRD 8000 may be wired to achieve the 
maximum power rating of 1,200 watts per channel or a total of 9,600 watts. The system may also be 
configured to provide two 1,200 watt outputs to each of four channels for a total of 2,400 watts per 
channel by setting both addressing switches the same.  It is important to know what your power 
requirements are before making connections to the dimmer. 

 


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OPERATIONAL HINTS 

1) Use a power source on a circuit separate from your audio system. 

2) Ensure that the rating of the breaker or fuse for the power source chosen is adequate. The 
required rating (in amps) of the breaker or fuse may be calculated with the following formula: 

I =P/E 

Where I = the current (in amps) 
 

P = the power (in watts) 

and 

E = the voltage 

(in volts) 

3) Always use quality 12 gauge (or heavier) grounded power cables for input power. 

4) Always use quality 18 gauge (or heavier) grounded power cables for output power. 

5) Avoid placing AC power cables or extension cords for lighting near sensitive audio cables 
(guitar cords, mic cables, audio snakes, etc.). 

6) Avoid blocking the ventilation holes on the sides of your dimmer pack. It is very important your 
unit has this ventilation to avoid possible damage which may void the warranty. 

 


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Caution: Please disconnect power before removing cover for service as high voltage is otherwise present. 

 

 

 

 

 

 

 
 
 
 
 
 
 
 

 
 
 

 
 
 
 
 

TROUBLESHOOTING GUIDE

 

 

SYMPTOM 

CHECK LIST 

NO OUTPUT, LED INDICATORS SHOW 

1. CHECK CHANNEL FUSES. (REFER TO 

STATUS OKAY 

DIAGRAM BELOW) 

NO POWER 

1. CHECK LINE FUSE (REFER TO DIAGRAM 

BELOW) 

2. IF FUSE BLOWS AFTER REPLACEMENT CHECK 

TRANSFORMER. 

1.CHECK CHANNELS FUSES 

2. CHECK FIXTURE LAMPS 

3. CHECK BLACKOUT FREATURE ON CONSOLE 

4. CHECK DIPSWITCH ASSIGNMENT 

5. CHECK MAXIMUM DIMMER ASSIGNMENT ON 

CONTROL CONSOLE 

6. CHECK SOFTPATCH ON CONTROL CONSOLE 

1. CHECK DIP SWITCH ASSIGNMENT. 

2. CHECK SIGNAL CABLE 

3. CHECK MAXIMUM DIMMER ASSIGNMENT AT 

CONSOLE 

4. CHECK OUTPUT MODE OF CONTROL CONSOLE. 

1. TRANSMISSION LENGTH MAY BE A PROBLEM. GET 

CONSOLE CLOSER WlTH A SHORTER CABLE TO VERIFY. 

REMEDY MAY BE THE USE OF 18 GAUGE CABLE OR AN 

EXTERNAL POWER SUPPLY AT THE CONSOLE. (CALL 

DEALER OR NSI TECHNICAL SERVICES FOR DETAILS). 

2. CHECK PRE-HEAT SETTING OF CONSOLE. 

LIGHTS ALWAYS OFF 

LIGHTS ON ALWAYS 

LED INDICATORS ON DIMMER PACK FLICKER 

OR GLOW DIMLY. 

LINE FUSE 

~ STANDARD 3/10 AMP SLO BLO 

CHANNEL FUSE LOCATION 

REPLACE WITH VALUES AS LISTED BELOW 
ND4600 8 AMP FAST BLO 
ND5000 15 AMP FAST BLO NRD 800015 AMP FAST BLO 

IF PROBLEMS PERSIST CONT ACT YOUR NEAREST NSI AUTHORIZED DEALER OR NSI TECHNICAL SERVICES 

AT 800-864-2502 BETWEEN THE HOURS OF 8:00 AM TO 5:00 PM PST MONDAY THRU FRIDAY. 

 


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NSI CORPORATION LIMITED WARRANTY 

NSI Corporation warrants new electronics products to be free from defective materials and 
workmanship for a period of two (2) years from the date of purchase to the original owner when 
purchased from an authorized NSI dealer. 

The purchaser is responsible for completing and mailing to NSI, within 15 days of purchase, the 
warranty registration card enclosed with each product. NSI products that have been subject to 
accident, alteration, abuse, or defacement of the serial number are not covered by this warranty. 
The normal wear and tear of items such as knobs, jacks, and switches are not covered under this 
warranty. 

If your NSI product requires service during the warranty period, NSI will repair or replace, at its 
option, defective materials provided you have identified yourself as the original owner of the 
product to NSI or any authorized NSI dealer. Transportation charges to and from an authorized 
dealer or the NSI factory for repair shall be the responsibility of the owner. All products 
returned to NSI must have factory authorization for return prior to shipping. 

NSI Corporation is not liable for any incidental or consequential damages resulting from defect 
or failure other than repairs of the NSI product subject to the terms of this warranty. This 
warranty gives you specific legal rights, and you may have other rights which vary from state to 
state. This warranty is expressly in lieu of all other agreements and warranties expressed or 
implied except as may be otherwise required by law.