NSI 2408CD Operating instructions

Page 1 of 10
2408 CD I
CR DIMMER SYSTEM
Software Revision 2.0, Version C INTRODUCTION
2408 CD
/
CR DIMMER SYSTEM
INSTALLATION AND OPERATION GUIDE
Software Revision 2.0, Version C
INTRODUCTION
The NSI 2408 dimmer represents a key part of a state of the art, total lighti
ng control system. Combined
with either NSI remote control panels and / or an NSI memory control console, a totally integrated
system is achieved.
The 2408 provides eight channels of 2400 watts each. This dimmer is designed to be permanently
installed for
control of house or stage lighting in schools, churches, theaters, buildings, etc. Several
remote control panels such as the NSI 400CP may be mounted at doorways, or other locations at which
dimmer control is desired. For entertainment lighting; an NSI mem
ory control console or other suitable
console may be added to the system for special lighting effects. Several 2408 dimmer packs may be
combined for more channels or circuits of lighting.
SPECIFICATIONS
Number of Channels:
8 (4 for 2404)
2400 watts \ chann
el (20A 120VAC)
120/240VAC or 120/208VAC 80A
Output capacity:
Input Power:
Line and Load connectors:
Pressure type screw terminals (CU wiring
only).
400us rise time torroids. (CR models only).
Load fi1tering: Control
Input Types: 0 -10VDC each channel.
DMX-
512 digital signal (512 channel).
MICROPLEX multiplex signal (128 channel).
Control Wiring:
Control Connections:
NSI's remote control digital signal (512 channel).
Class 2 low voltage.
Cooling System:
Pressure type screw terminals. Passive
aluminum fins.

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2408 CD / CR DIMMER SYSTEM
MOUNTING Software Revision 2.0, Version C
36"
12"
12"
6"
MOUNTING
The 2408 CD Dimmer pack or 2408 CR Relay pack must be mounted securely in a dry location
to the surface of a wall or other vertical flat surface in a
manner which is capable of supporting
it's weight. Nine "key-
hole" type mounting holes for 1/4" lag screws are provided in the back
wall of the unit for this purpose. See diagram for hole locations.
Minimum distance from top to ceiling:
Minimum distance from top to other equipment:
Minimum distance from side adjacent to wall:
Minimum distance from side to other equipment:
Since the 2408 CD/CR depends upon convection cooling, room airflow must not be prevented
by walls or other obstructions. Adequate
side and top clearances from adjacent walls and
equipment are necessary:
If several units are to be installed in a small-
enclosed room, adequate ventilation must be
provided to prevent the room temperature from exceeding 100 degrees Fahrenheit.
Clear
working space and access to the 2408 CD/CR must be provided in accordance with
electrical codes.

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2408 CD / CR DIMMER SYSTEM
Software Revision 2-0, Version C INPUT WIRING
INPUT WIRING
The 2408 CD/CR must be provided with an 80 amp, 120/240 or
l20/208Y VAC, three wire
electrical service. This service must include two live wires not exceeding 150 volts to ground
and one neutral wire.
In addition the unit must be grounded by conduit or an additional ground wire in accordance with
electrical codes.
The input wiring should be #4 AWG THWN or equivalent copper wire rated for least 75 C.
Pass the input wiring through the 1 1/4" conduit hole in the top of the unit. Allow the wires to drop 4
-
6"
into the unit then loop the wires back upwards (see diagram #
2). Connect each of the two live wires to the
copper lugs located above the circuit breakers and connect the neutral wire to the neutral bar .If provided,
connect the additional ground wire to the terminal marked "GND".
120/24O or 120/200 80A
------------------------------------------------------------------------------- ----------------------------------------------------------------------------
20 AMP CIRCUIT BREAKERS 20 AMP CIRCUIT BREAKERS

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2408 CD / CR DIMMER SYSTEM
LOAD WIRING Software Revision 2.0, Version C
LOAD WIRING
The 2408 CD/CR can provide eight tungsten or resistive branch lighting circuits of 120V AC at 20 amps
each. If the lighting l
oads are expected to operate continuously at full power for three hours or more, then
the load must not exceed 16 amps in accordance with electrical codes.
The load wiring should be at least #12 AWG in size and must be copper wire rated for at least 75 C s
uch
as THWN .The load wiring may exit through either of the ½”-
¾” knockouts located in the load wiring
compartment or may exit through the top of the unit.
2408 CD
The live wire (black) of each load connects to the copper terminal located below each filte
r coil. The
neutral wires (white) for all loads connect to the neutral bar located near the circuit breakers. If the loads
require individual ground wires, these will connect to the ground bar located in the load-
wiring
compartment.
2408 CR
The live wire (
black) of each load connects directly to the ¼” quick
-
connect tabs of the solid state power
cubes using the yellow crimp-
on connectors provided. The channel number corresponding to the power
cube tab is indicated on the cube. The neutral wires (white) for
all loads connect to the neutral bar located
near the circuit breakers. If the loads require individual ground wires, these will connect to the ground bar
located in the load
-
wiring compartment.

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2408 CD / CR DIMMER SYSTEM
Software Revision 2.0, Version C TESTING
TESTING
If desired, the dimmer may be tested without any control signal input by moving SWITCH #8 to
the off and then the on position on both of the dimmer firing cards after
the system is energized.
This will cause all dimmer channels to go to fu
ll intensity for testing load circuits. Dimmers will
ignore all control signals in this case.
NOTE: If Switch #8 is set on before power is applied to the dimmers, then the lighting loads associated
with that firing card will come to 50% intensity (full on
for CR's) when power comes on. This is useful
for emergency lighting purposes. The console or remote panels may take control after light come on.
CAUTION
INSPECT INSIDE OF DIMMER PACK FOR LOOSE BITS OF WIRE OR HARDWARE THAT MAY
HAVE FALLEN ONTO THE CONTROL
CIRCUIT BOARDS AND BE SURE ALL INPUT AND
LOAD WIRING IS COMPLETE BEFORE ENERGIZING ELECTRICAL SERVICE TO DIMMER.
CONTROL WIRING
Control wiring to the 2408CD should be Class 2 wiring. All control wiring must stay below the
barrier separating the control wi
ring compartment from the load wiring. All control wiring must
exit out of either of the 1/2"-
3/4" knockouts located in the control wiring compartment. Several
types of low voltage control inputs may be employed as discussed below. Under no
circumstances c
an any control signal input exceed 15 volts.
Individual 0
-10 VDC control wiring.
Each of the eight dimmer channels of the 2408 CD/CR may be operated by a O
-
10 VDC
control voltage. This type of control will provide 0% intensity at 0 volts and 100% intensi
ty at
10 volts. Any or all of the dimmer channels may be operated in this manner simultaneously with
either of the multiplex control inputs. Each dimmer will respond to the greater of any control
inputs.
Connect each of the plus control wires to the desire
d dimmer channel connections (see diagram)
on each of the dimmer firing cards. Connect the common control wire to one of the COMMON
connections provided on the power supply card. This control input impedance is 4.7K ohms.
If a +15 VDC power source is requi
red for the control console, connect an additional wire to the
+ 15 VDC terminal on the power supply board. This wire and the common wire must be at least
18 gauge. This power supply can deliver 750 MA maximum and can be connected in parallel to
other 2408
CD/CR packs.
DMX
-512 multiple control wiring.
DMX
-
512 is the preferred type of control wiring because of the high update rate and the
resistance to interference. It is highly recommended in locations subject to electrical noise.
DMX-512 only requires 3 wi
res transmit lighting levels to as many as 512 dimmer channels.
DMX-
512 should not be used simultaneously with Microplex. Most of the NSI lighting control
consoles can use this interface.
Connect the three DMX
-
512 control wires to the appropriate terminals
provided on the power
supply card. Duplicate terminals are provided to carry the control connections to more dimmer
packs if necessary. Be sure to set the Channel Address on the dipswitches of the dimmer firing
cards as required. If a+ 15 VDC power source
is required for the control console, connect an
additional wire to the + 15 VDC terminal on the power supply board. This wire and the common
wire must be at least 18 gauge. This power supply can deliver 750 MA maximum and can be
connected in parallel to o
ther 2408 CD/CR packs.

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Microplex is the control protocol used on all NSI lighting console. This system uses a shielded
wire to transmit up to 128 channels of dimmer control. Microplex should not be used
simultaneously with DMX-512. For short distances (50 feet) a standard microphone cable is 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 wires to the appropriate terminals on the power supply card. If an
XLR type connector is used to connect the control console, connect pin 1 to common, pin 2 to + 15
VDC, and pin 3 to MICROPLEX. A duplicate set of connections is provided to carry the control
signal to more dimmer packs. Be sure to set the Channel Address dip switch as required.
Remote control connections.
Special accessories manufactured by NSI may be connected to this dimmer, such as the 4OOCP control
panel for doorways. See the installation instructions that come with these accessories.
LED’S
The indicator LED’s on the dimmer firing cards indicate the status of the dimmer .
??RED Indicates the card is receiving DC power (both cards will light even if only one line
is
energized)-
??GREEN Steady indicates a multiplex control signal is being received. Flashing indicates
that a fade, initiated from a remote panel, is in process.
??YELLOW Indicates a respective dimmer channel is active and LED indicates relative
intensity.
2408 CD / CR DIMMER SYSTEM
Software Revision 2.0, Version C
Microplex multiplex control wiring.

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2408 CD / CR DIMMER SYSTEM
Software Revision 2.0, Version C JUMPER SETTINGS
JUMPER SETTINGS
NON
-VOLATILE MEMORY
The version C control card now contains an EE
PROM device to store lighting levels for
automatic full restoration after a power fail.
When the installer enables this feature, the dimmer will save the current lighting levels in non
-
volatile memory 10 minutes after there has been a change in lighting le
vels. This is an important
feature in house and architectural lighting systems, where it is important for the lighting to be
fully restored after a power blackout. Dip Switch 8 may be left on in lieu of the memory jumper
for restoration to a fixed level of
50% instead.
In theatrical stage lighting systems, this feature may not be desirable, since the dimming system
is turned off frequently.
SOFTSTART
The 2408 CD comes from the factory configured in the "SOFTSTART" operating mode. This
mode of operation forc
es at least a 1/10th second delay between the output being full off to the
output being full on to allow a more gradual warming of the lamp filaments. Thermal shock and
inrush currents are reduced thereby increasing lamp life and preventing nuisance trippi
ng of the
circuit breakers.
To disable SOFTST ART; remove the jumper block from the pins marked 112 on the firing
cards. Each firing card affects only it's respective four channels. Replacing the jumper block will
restore SOFTSTART.
NOTE: The 2408 CR and a
ny channels of the 2408 CD configured for NON DIM operation will
not be affected by soft start.
For house lighting and architectural systems:
Make sure the jumper block on each control card is installed across both jumper pins marked
SPCL on the. It is als
o a good idea to make sure the jumper is installed across both jumper pins
marked SOFT
-
START (CD's only).
For Stage Lighting Systems:
Make sure the jumper block on each control card is NOT across both jumper pins marked SPCL.
You must also remove the SOFT-
START jumper on each control card so the lights will not
appear sluggish in response.
NON DIM CHANNELS
Any of the channels of the
2408
CD can be configured as NON DIM channels. This will cause
the output of the channel to go to full on whenever the input
signal is over 10. When to input
signal drops to less than 100C;
the channel output goes to full off. This is the equivalent of a
zero
-
crossing solid state relay.
To configure a channel for NON DIM operation simply remove the jumper block from the pins
on
the firing card as indicated. Replacing the jumper block will restore dimming operation.

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2408 CD I CR DIMMER SYSTEM
SWITCH SETTINGS Software Revision 2.0, Version C
SWITCH SETTINGS
When using any of the multiplex control systems the dip switches on the
2408
CD/CR
must be
set to assign the desired dimmer channels. The switches control the dimmer channels in groups
of four .The dip switch on the left dimmer firing card controls circuit channels 1-
4 while the dip
switch on the right card controls circuit channels 5-
8 of the pack. Both switches may be set to the
same settings if only four control channels are desired. See the following chart for settings.
DIPSWITCH CHANNEL ASSIGNMENTS
CONTROL 1234567 CONTROL 1234567 CONTROL 1234567
1-40000000 5-81000000 9-12 0100000
13-16 1100000 17-20 0010000 1-24 1010000
25-28 0110000 29-32 1110000 33-36 0001000
37-40 1001000 41-44 0101000 45-48 1101000
49-52 0011000 53-56 1011000 57-60 0111000
61-64 1111000 65-68 0000100 69-72 1000100
73-76 0100100 77-80 1100100 81-84 0010100
85-88 1010100 89-92 0110100 93-96 1110100
97-100 0001100 101-104 1001100 105-108 0101100
109-112 1101100 113-116 0011100 117-120 1011100
121-124 0111100 125-128 1111100 129-132 0000010
133-136 1000010 137-140 0100010 141-144 1100010
145-148 0010010 149-152 1010010 153-156 0110010
157-160 1110010 161-164 0001010 165-168 1001010
169-172 0101010 173-176 1101010 177-180 0011010
181-184 1011010 185-188 0111010 189-192 1111010
193-196 0000110 197-200 1000110 201-204 0100110
205-208 1100110 209-212 0010110 213-216 1010110
217-220 0110110 221-224 1110110 225-228 0001110
229-232 1001110 233-236 0101110 237-240 1101110
241-244 0011110 245-248 1011110 249-252 0111110
253-256 1111110 257-260 0000001 261-264 1000001
265-268 0100001 269-272 1100001 273-276 0010001
277-280 1010001 281-284 0110001 285-288 1110001
289-292 0001001 293-296 1001001 297-300 0101001
301-304 1101001 305-308 0011001 309-312 1011001
313-316 0111001 317-320 1111001 321-324 0000101
325-328 1000101 329-332 0100101 333-336 1100101
337-340 0010101 341-344 1010101 345-348 0110101
349-352 1110101 353-356 0001101 357-360 1001101
361-364 0101101 365-368 1101101 369-372 0011101
373-376 1011101 377-380 0111101 381-384 1111101
385-388 0000011 389-392 1000011 393-396 0100011
397-400 1100011 401-404 0010011 405-408 1010011
409-412 0110011 413-416 1110011 417-420 0001011
421-424 1001011 425-428 0101011 429-432 1101011
433-436 0011011 437-440 1011011 441-444 0111011
445-448 1111011 449-452 0000111 453-456 1000111
457-460 0100111 461-464 1100111 465-468 0010111
469-472 1010111 473-476 0110111 477-480 1110111
481-484 0001111 485-488 1001111 489-492 0101111
493-496 1101111 497-500 0011111 501-504 1011111
505-508 0111111 509-512 1111111

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2408 CD / CR DIMMER SYSTEM
Software Revision 2.0, Version C INSTALLATION TIPS
INSTALLATION TIPS
Care should always be taken to:
1) Keep all AC wiring away from control wiring.
2) Perform a careful inspection of control circuitry for wire clippings and verification of connections.
3) We
also recommend powering 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 said problem.
OPERATION
To raise lighting levels with a 400CP remote:
Press and hold the increase button of the zone desired. If the unit is in the power down state,
power will come on in 1/4 second. The 400CP will then take control of all dimmer channels
assigned to the selected zone and increase lighting levels at th
e programmed fade rate. Release
button .when correct lighting levels are attained.
To lower lighting levels with a 400CP remote:
Press and hold the decrease button of the zone desired. If the unit is in the power down state,
power will come on in 1!4 secon
d. The 400CP will then take control of all dimmer channels
assigned to the selected zone and decrease lighting levels at the programmed fade rate. Release
button when correct lighting levels are attained.
To take control with a console using DMX, AMX, Microplex, or Analog control system:
Simply perform a change in the channel level from the console. The lighting channel will then
fade back to the new console level at a moderate fade rate. Once the lighting level matches the
console level, full console contr
ol will be resumed.

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2408 CD I CR DIMMER SYSTEM
NSI Corporation Limited Warranty Software Revision 2.0, Version C
WARRANTY
NSI Corporation Limited Warranty
NSI Corporation warrants new electronics products to be free from defective materials and
workm
anship 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 en
closed with each product. NSI products that have been subject to
accident, alteration, abuse, or defacing 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. Trans
portation 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 inci
dental 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.