Strand Lighting Offices
Strand Lighting - Dallas
10911 Petal Street
Dallas, TX 75238
Tel: +1 214-647-7880
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267 5th A ve, 4th Floor
New York, NY 10016
Tel: +1 212-213-8219
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Unit C, 14/F, Roxy Industrial Centre
No. 41-49 Kwai Cheong Road
Kwai Chung, N.T., Hong Kong
Tel: +852 2796 9786
Fax: +852 2798 6545
The material in this manual is for information purposes only and is subject to change without notice. Strand
Lighting assumes no responsibility for any errors or omissions which may appear in this manual. For comments and
suggestions regarding corrections and/or updates to this manual, please contact your nearest Strand Lighting office.
El contenido de este manual es solamente para información y está sujeto a cambios sin previo aviso. Strand
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vous plait contacter le bureau de Strand Lighting le plus proche.
Information contained in this document may not be duplicated in full or in part by any person without prior written
approval of Strand Lighting. Its sole purpose is to provide the user with conceptual information on the equipment
mentioned. The use of this document for all other purposes is specifically prohibited.
Strand Selecon - Auckland
19-21 Kawana Street
Northcote, Auckland 0627
New Zealand
Tel: +64 9 481 0100
Fax: +64 9 481 0101
Strand Lighting - Europe
Rondweg zuid 85
Winterswijk 7102 JD
The Netherlands
Tel: +31 (0) 543-542 516
Website:
www.strandlighting.com
Document Number: 2-450173-040 (Rev. A)
Version as of: 06 February 2013
C21 Advanced Technology Dimmer Rack Installation Guide
©2013 Philips Group. All rights reserved.
C21 Advanced Technology Dimmer Rack
TABLE OF CONTENTS
This manual describes the installation of the C21 Advanced Technology dimmer rack. The installer should refer to the
separate C21/EC21 Operation Guide for detailed information concerning the initial setup procedures referred to in the
Commissioning section of this manual.
Strand Lighting Offices ........................................................................................................ Inside Front Cover
Table of Contents
Preface
About This Guide.................................................................................................................................................... 3
Technical Assistance............................................................................................................................................... 3
Definition of Terms .................................................................................................................................................. 3
Hardware Description
Overview................................................................................................................................................................. 6
Construction............................................................................................................................................................ 7
Size and Weight............................................................................................................................................... 7
Contracting Access.......................................................................................................................................... 7
Supply Connection........................................................................................................................................... 7
Rack Supply Voltage and Frequency .............................................................................................................. 7
Phasing............................................................................................................................................................ 7
Dimmer Module Connectors............................................................................................................................ 7
Control Input/Output Connection ..................................................................................................................... 7
Cooling Fans...................................................... ... ................................. ... ....................................................... 8
Rack Processor Housing (RPH) ...................................................................................................................... 9
Rack Processor Module (RPM)............................................................................................................................... 9
Control Interconnection Card.......................................................................................................... ...................... 10
Dimmer Modules................................................................................................................................ ... ................ 11
Reporting Dimmer Modules........................................................................................................................... 11
IGBT Dimmer Modules.......................................................................................................................... ... ..... 12
IGBT Dimmer Module Switch Pack ............................................................................................................... 13
Installation Guide
Installation
Environmental Considerations......................................................................................................................... ..... 14
Conduit Layout...................................................................................................................................................... 15
Positioning the Dimmer Rack(s)....................................................................................................................... ... .. 16
Preparing the Rack for Wiring...................................................................................................... ......................... 17
Locating Dimmer Components.............................................................................................................. ... ............. 18
Power Wiring......................................................................................................................................................... 19
Dimmer Rack Bussing .......................................................................................................................................... 21
Load Wiring............................................................................................................................. ... ........................... 22
Control Wiring............................................................................ ... ................................. ....................................... 23
Install the Rack Processor Housing...................................................................................................................... 23
Connecting Power to the Rack Processor Housing....................................................................................... 24
Connecting the Dimmer Control Cable Harness................................................................................................... 24
Connecting the Control Signal Wiring ................................................................................................................... 25
1
Installation Guide C21 Advanced Technology Dimmer Rack
Control Cable Routing................................................................................... ... ... .................... ....................... 25
Ethernet Control Wiring.................................................................................................................................. 26
DMX512 Wiring.............................................. ... ................................. ... ..................................................... ... . 27
SWC/Outlook Control Wiring ......................................................................................................................... 28
Remote Contact Closure Connections........................................................................................................... 29
RS232 Interface.................... .. ... .................................. ... ................................. ... ... .................... .. .................. 30
Select Dimmers for Panic . .................................................................................................................... ......... 31
Installing the Door.......................................................................... ... ........................................................ ............ 31
Commissioning
Safety Check............................................................................................................................ ... .......................... 32
Initial Power Up............................................................................................................................................ ... ...... 32
Processor Self Test and Fault Identification...................................................................................... .................... 32
Rack Processor Housing LEDs............................................................................................................................. 33
LED Status........................................................................................................................ ... .......................... 33
Rack Processor Module LEDs...................................................................................................................... . 33
Dimmer Events .................................................................................................................... .......................... 33
Output Check....................................... ... ................................. .................................. ........................................... 33
Initial Programming............................................................................................................................................... 34
Programming and Fault-Finding............................................................................................ .................... ... ......... 34
2 Table of Contents
C21 Advanced Technology Dimmer Rack
PREFACE
1. About This Guide
Thank you for choosing Strand Lighting C21 Advanced Technology dimmer racks. We trust that the equipment will
meet all your dimming needs and will provide you with reliable service for many years.
This manual describes the installation procedures for C21 Advanced Technology dimmer racks. A separate C21/EC21
Operation Guide describes the software operation and its use.
Strand Lighting can assure you that every effort has been made to ensure that the equipment has been designed to
meet the highest professional standards and that dimmer racks and their components have been assembled,
inspected, and tested in accordance with our strict quality assurance program.
Should you encounter any problems or difficulties with your dimmer racks, please contact the nearest Strand Lighting
service representative. For a complete list of Strand Lighting offices and service centers, see below or visit our Web
site (www.strandlighting.com).
2. Technical Assistance
C21 racks and dimmers require a minimum of maintenance and servicing.
For operation or technical assistance, please contact Strand Lighting or the local Authorized Service Center serving
your area. (www.strandlighting.com)
Installation Guide
3. Definition of Terms
This manual uses the following terms throughout:
channel A device controlling a dimmer or group of dimmers. Historically, there is a physical controller (such as
a slider) for each channel. On most current control systems, channels are numbers accessed by a
numeric keypad. Each channel can control multiple dimmers.
circuit A connection device and wiring for powering a lighting fixture from a dimmer.
circuit ID A unique four-digit numeric identity which you can assign to each dimmer. The circuit ID may be the
same as the dimmer number, or may be a number used to indicate circuit location, phase, channel
number, etc. This feature is useful for system wide control functions.
crossfade A fade that contains both an up-fade and a down-fade, or any fade where the levels of one cue are
replaced by the levels of another cue.
cue The process of recalling a preset from its memory location and putting the result on stage.
Preset, Memory, and cue are often used interchangeably.
curve The relationship between a control level and the actual dimmer output.
dimmer A device controlling power to a lighting fixture. Two lights on the same dimmer cannot be separately
controlled.
default The original factory settings.
DMX512 An ANSI communications protocol standard that describes a method of digital data transmission
between controllers, lighting equipment and accessories.
Ethernet A high-speed network based protocol used to transmit data from a lighting controller to a dimmer rack
using a single Ethernet cable.
About This Guide 3
Installation Guide C21 Advanced Technology Dimmer Rack
fade A gradual change in stage levels from one set of intensities ("look") to another.
fade time The time it takes for dimmer levels to go from their current levels to the levels in the selected preset, or
DMX512 value. Each preset has its own fade time.
IGBT Insulated Gate Bipolar Transistor. IGBT dimmers are solid-state and operate silently without the use of
chokes and can handle a variety of load types. They reduce lamp filament noise during dimming
operation, are smaller, lighter, and generate far less neutral harmonics than conventional dimmers.
IGBT dimming technology provides superior overload and short-circuit protection and operates at
significantly higher rise/fall times regardless of load size.
level A numerical value used to express the "brightness" of the load on a dimmer. Usually shown as %.
Outlook A Strand Lighting architectural control system. Outlook was eventually replaced by another Strand
Lighting architectural system called Vision.net, however, C21/EC21 racks continue to support Outlook
for legacy installations.
patch Historically, the process of physically connecting circuits to dimmers. Now usually refers to electronic
assignment of dimmers to channels.
phase The three phases of the mains supply to which the dimmers are connected are identified as Line 1,
Line 2, Line 3 in 230v markets and as phase A, phase B, and phase C in 120v markets.
4 Preface
C21 Advanced Technology Dimmer Rack
power
module A chassis containing one or two dimmers or contactors. This is sometimes referred to as a "dimmer".
However, each C21/EC21 power module can have multiple dimmers or contactors in it, so this manual
distinguishes between dimmers (individual power control circuits) and power modules (a collection of
one or more power control circuits).
preset A pre-defined setup of intensities for a set of channels, stored in memory for later replay.
preset
fade time See "Fade Time"
profile The relationship between a control level and the actual dimmer output. Also known as ‘dimmer law‘ or
‘curve’.
rack number A number used to uniquely identify each dimmer rack in a multiple rack system. Rack numbers are set
from the front panel of the rack processor module, and are usually set by the installation engineer.
room An area separately defined for purposes of architectural lighting control. This is usually a room in the
traditional sense (an indoor enclosed area) or a portion of a room that can be partitioned off. Each
room may be separately and simultaneously controlled by the system.
RPH Rack Processor Housing
RPM Rack Processor Module
Installation Guide
SSR (Solid State relay) A power control device used in Strand dimmers that contains two silicon control
rectifiers (SCRs), control circuitry, and optical isolation circuitry.
SWC (System Wide Control) A Strand Lighting dimmer rack control system that utilized 128 backup presets.
SWC was eventually replaced by another Strand Lighting architectural system called Vision.net,
however, C21/EC21 racks continue to support SWC for legacy installations.
Vision.net A digital architectural control system for use with C21/EC21 dimmer racks.
Definition of Terms 5
Installation Guide C21 Advanced Technology Dimmer Rack
HARDWARE DESCRIPTION
1. Overview
The C21 Advanced Techno logy dimmer rack is a listed, free standing, factory assembly of steel and aluminum
construction finished in a fine textured, scratch resistant coating.
Each C21 dimmer rack consists of a rack processor housing (RPH) with one or two rack processor modules (RPM), a
fan module, and up to 24 or 48 dimmer modules. The dimmer connectors at the back of the rack provide for load wire
connection. Main bus bars are provided for line wire connections. An earth ground lug is provided in the rack. The
dimmer connectors in the rack are polarized to prevent dimmer modules being plugged into different ampacity slots.
The dimmer racks can be individually fed or bused together using an optional bussing kit.
Large dimmer racks have provision for up to 48 dimmer modules. Small dimmer racks have provisions for up to 24
dimmer modules. Dimmer module types can be mixed within a rack in various combinations.
Rack processor modules are available with 96 dimmer control outputs to drive C21 dimmers.
6 Hardware Description
Figure 1: C21 Rack Layout (Fully Populated)
C21 Advanced Technology Dimmer Rack
2. Construction
The rack is constructed of steel and aluminum and is finished in a fine textured scratch resistant coating. The rack will
accept removable trays for the dimmer modules, which are screwed in place. The rack and all modules are earth
grounded.
Size and Weight
A hinged, locking door covers the front of the dimmer rack. Rack components are designed for easy removal and
installation so that the dimmer rack is open and empty during installation. Mounting holes are provided so that racks
can be bolted together and to the floor.
Dimensions: Height 80" Width 24.36", Depth 23.62"
(Height 2032mm, Width 619mm, Depth 600mm)
Weight: With 48 dual standard dimmers and one rack processor module - 690 lbs (310 Kg)
Without dimmer modules, rack processor modules – 300 lbs (136 Kg)
Contracting Access
Power cable entry, supplying power to the bus bars is through the bottom. Contractor load wire connections for the live
and neutral are through the top of the rack and directly onto the module connectors.
Supply Connection
The rack is provided with three-phase plus neutral and earth bus bar distribution, located at the bottom of the rack. The
maximum power rating for each dimmer rack is 800A per phase. Busing across multiple racks is possible using the
rack interconnection busing kit.
Installation Guide
Rack Supply Voltage and Frequency
The C21 rack is suitable for use with supply voltages of between 90 and 264VAC power and frequency range of 47 to
63 Hz.
Phasing
Phasing within standard dimmer racks is sequential across the dimmer slots, running in the phase sequence A, B, C,
A, B, C. All dimmers in a vertical column down the rack are on the same phase. In dual dimmer modules, both dimmers
are on the same phase. When looking at the front of the dimmer rack, phase A is the first and fourth columns. Phase B
is the second and fifth columns and phase and phase C is the third and sixth columns.
Dimmer Module Connectors
The modules connect to the rack through a proprietary connector with female power pins and solid brass male power
pins. The connector is self-aligning when the module is inserted. Control signals are incorporated into the connector.
The aperture is suitable for wire gauge 6 AWG or smaller, and has a tapered entry hole to ease wire insertion. The wire
is retained by Allen screw. A wire adaptor is available for 2 AWG wire, when required
Control Input/Output Connection
The Control Interconnection Card (CIC) contains all terminals for control input/output with the exception of the Ethernet
receptacle that is located in the upper left rear of the rack.
Construction 7
Installation Guide C21 Advanced Technology Dimmer Rack
Cooling Fans
The dimmer racks are cooled by a set of low noise variable speed fans in a fan module at the top of the rack. The
cooling system is designed to let the rack continue functioning if any one of the fans fail. Cooling air is pulled up
through the dimmer stack and exhausted through venting at the top of the rack. These fans are for di mmer cooling
only, and can be set to fixed or variable speed.
The fixed speed fan setting is for situations where changes in ambient noise are a problem. With this settin g, the fans
are always ON when any dimmer is energized.
The variable speed fan setting minimizes noise and maximizes fan life. With this setting, the fan speed with nonreporting modules is adjusted based on the temperature of the dimmer rack. The fan speed with reporting dimmer
modules is based on the temperature of the dimmer modules and the dimmer rack. Increases in fan speed take 1
minute with this setting, while decreases in fan speed take 5 minutes. Fans are turned OFF when no dimmers are in
use.
Fan and dimmer module choke noise may be acoustically objectionable. C21 Advanced Technology dimmer racks
should be installed away from performance, stage and audience areas.
Fan ModuleFan Module
24 MODULE RACK
Figure 2: Fan Module
48 MODULE RACK
8 Hardware Description
C21 Advanced Technology Dimmer Rack
LCD
A
A
Rack Processor Housing (RPH)
Each C21 dimmer rack contains a rack processor housing (RPH). This housing contains the rack processor module(s),
power supplies, and control interconnection card (CIC) for the rack, and is shipped separately from the rack to
minimize the possibility of damage.
This chassis can be equipped with one or two rack processor modules (RPM). The second processor module acts as
a backup to the main processor. The configuration data from either processor is transferred into the other processor
automatically. The currently inactive processor always tracks the currently active processor.
Installation Guide
Main Power Supply
Optional
Power Supplies
Rack Processor Module
Figure 3: Rack Processor Housing (RPH)
CIC
Power Supply
Plug In Connector
Optional Ethernet Switch
CIC
Optional
Power Supplies
Main Power Supply
Rack Processor Housing
Optional Back-Up
Rack Processor Module
Lighthouse Beacon
3. Rack Processor Module (RPM)
Each C21 rack contains one or two rack processor modules (RPM). Each rack processor module has an LCD display,
keypad, and LEDs to report processor module and dimmer status and allow simple setup and control at the rack. If
there are any rack or dimmer events reported, the display will show error messages.
Pressing the [>] key takes you into a series of setup menus to view and set up the more frequently used C21 features.
See the Operation Manual for details on accessing these functions.
All program data is held in non-volatile RAM within the rack processor module.
Status LED’s
Control Keypad
NETWORK CONNECTI O N
DMX512 RDM PORT
DMX512 PORT B
PROCESSOR OK
MODULE EVENT
CTIVE PROCESSOR
Figure 4: Rack Processor Module (RCM)
Rack Processor Module (RPM) 9
Installation Guide C21 Advanced Technology Dimmer Rack
4. Control Interconnection Card
The Control Interconnection Card, or CIC, is the printed circuit board on which all contractor control wiring connections
are made. It is located on the top of the Rack Processor Housing (RPH) and contains:
• An optional Ethernet switch, which connects to a Strand ShowNet system. This switch allows for easy connections
between dimmer racks. It also connects to the network receptacle located in the upper left rear of the dimmer rack.
• Two optically isolated DMX512 control inputs. The first input will accept DMX512. The second DMX512 input is configurable to accept either DMX512 or Strand Lighting’s Vision.net architectural protocol. Each DMX512 input has a
patch to allow overlapping or separation of any DMX512 control level.
• Six optically isolated contact inputs, for:
Pin Function Type Description
1 PANI C ON Momentary Turns Panic On
2 PANI C OFF Momentary Turns Panic Off
3 FIRE ALARM Maintained Turns Panic On, No Override
4 SWC PRESET 1 Momentary Fires SWC Preset 1
5 GO NEXT SWC Momentary Fires "Next" SWC Preset
6 GO SWC OFF Momentary Fires SWC Preset 0 (Blackout)
7 Com/Gnd - Com/Gnd
8 Com/Gnd - Com/Gnd
• An Audio Visual Interface port. This serial input will support connection to an external A/V or show control system
that supports an RS232 or RS485 serial connection.
• 96 panic select switches
Rack Processor Module
Plug-In Connector
Dimmer Control
Ribbon Connectors
(T1 – T6 & B1 – B6)
Panic Select Switches
Control Input
Connectors
Fan Cable
Connector
Power Supply
Plug-In Connectors
10 Hardware Description
Figure 5: Control Interconnection Card (CIC)
C21 Advanced Technology Dimmer Rack
r
k
5. Dimmer Modules
The power modules are the high power switching section of the C21 dimming system. The power block in this module
is the interface between the high power AC and low power control. It is driven by low level signals (5mA, 3-24V) and
switches high level signals (up to 100A, 120/240VAC). High specification filtering, SCR dimming, contactor non-dims,
IGBT dimming, and load status reporting electronics are available as options. Dimmers can be mixed in any
combination in a rack. This lets you use the exact dimmer type needed for each circuit.
Power modules are constructed from aluminum, folded to form three sides of the dimmer and to support the dimmer
connector and heatsink. The fourth side of the dimmer is formed by the heatsink. The top and bottom of the dimmer
are open for cooling.
A sturdy handle is provided below the circuit breakers.
An optional locking bar on the dimmer tray secures the dimmers in the rack.
Installation Guide
Connecto
Reporting PCB
(optional)
SSR or SCR Pac
Figure 6: Dual Dimmer Module
Chokes
Circuit Breakers
Dimmer Wing
With Type & Rating
Handle
Chassis
Reporting Dimmer Modules
Most C21 dimmer modules are available in load status reporting versions. Load status reporting versions of dimmers
can be mixed in any combination with standard dimmers in C21 racks. These dimmers report many dimmer status
items back to the processor. The information can be accessed through various menu items. The processor can then
display a wide range of faults and diagnostic data.
Each Reporting dimmer module contains a temperature sensor which will shut it down if it overheats. Anything causing
overheating in the rack will cause a gradual shutdown as each Reporting dimmer module overheats.
Dimmer Modules 11
Installation Guide C21 Advanced Technology Dimmer Rack
IGBT Dimmer Modules
C21 IGBT electronic dimmers provide users with exceptionally quiet and efficient dimming for a wide range of loads.
Each IGBT dimmer features forward and reverse phase control operating modes suitable for dimming incandescent
and low voltage loads as well as a broad range of LED loads.
All C21 IGBT dimmers offer low insertion loss and microprocessor controlled over current and short circuit protection.
Resetting the dimmer to zero percent (0%) from the control system will restore operation in the event of a module
shutdown.
WARNINGS!
• Make sure that the neutral wire is landed correctly with its corresponding load wire for proper operation. Failure to
do so will cause the dimmer module to shut down.
• Since the IGBT dimmer module monitors the dimmer rack power feed at all times, it is imperative that the power
feed is clean and free of any distortion.
• In the presence of poor quality power with significant mains disturbances, the IGBT dimmer module may shut down
to protect the IGBT power devices.
• IGBT dimmer modules should be configured as "Sinewave" module types when configuring the C21 dimmer rack
processor.
12 Hardware Description
C21 Advanced Technology Dimmer Rack
IGBT Dimmer Module Switch Pack
The DIP Switches located at the side of the IGBT dimmer module allow for configuration of dimmer options.
Note: Dual-channel modules have a separate switch pack for each channel.
• CONTROL MODE - (Factory Default ON) (Factory Default: Force FPC) Dimmer racks must be operated under normal conditions with all dimmers configured to Force FPC. If directed by Strand Technical Support, changing this
switch to the AUTO mode position will allow the dimmer to automatically sense the load type and select either
Reverse Phase Control or Forward Phase Control, based on the load's behavior. AUTO mode should be used only
when a load does not operate properly in the default F orce FPC mode .
• RPC LOCK (LED) - (Factory Default: Normal) When used in combination with CONTROL MODE = AUTO, setting
this switch to the Force RPC position locks the dimmer into reverse-phase-control only operation, which may be
required for certain LED loads. Always set this switch to Normal in all other cases.
• TRANSITION CONTROL - (Factory Default Automatic) Automatic operation allows the IGBT dimmer to monitor and
adjust its transition control (up to 1000uS in 120V installations, and up to 650uS in 230V installations) based on several operational factors. The "Fixed at 400uS" position should ALWAYS be used when the dimmer is operating a
phase-controlled electronic ballast or LED driver as its load, because these devices expect fixed transition times for
proper dimming level selection.
• FULL OUTPUT VOLTAGE - (Factory Default: 120V / 240V) These switches select the RMS output voltage to be
delivered by the dimmer when the control level is 100%. Choose a non-default value if lamps of a lower voltage rating (e.g., 115V on 120V) are used in the lighting rig.
• PREHEA T - (Factory Default: Preheat Disabled) When changed to the non-default position (Preheat Enabled), the
dimmer will generate a very low voltage to the loads, when they are "off", to keep the filaments heated, improving
response time. This feature should only be enabled on larger-wattage, incandescent lamps and only when faster
turn-on response is required.
Installation Guide
DIPSWITCHES
ON
1
CONTROL MODE
Switch 1:
-ForceFPC
- Auto (RPC/FPC)
RPCLOCK(LED)
Switch 2:
-NormalOperation
-ForceRPC
TRANSITION CONTROL
Switch 3:
- Automatic
- Fixed at 400uS
23456
PREHEAT
Switch 4:
- Preheat Disabled
- Preheat Enabled
DEFAULT
All Switches Up (ON)
FULL OUTPUT VOLTAGE
Switches 5 & 6:
- 120V (240V)
- 115V (230V)
- 110V (220V)
- 100V (200V)
CAUTION: It is never
recommended to set the
switches to Reverse Phase
Control (RPC) for an entire rack
of IGBT modules.
Figure 7: DIP Switch Settings
Dimmer Modules 13
Installation Guide C21 Advanced Technology Dimmer Rack
INSTALLATION
1. Environmental Considerations
Before installing your C21 dimmer rack, you should carefully consider the environment in which the equipment is to be
installed, the power feeding the equipment and the required conduit and/or cable runs.
To maximize equipment life and minimize the chance of failures, the following environmental requirements should be
met:
• Operating temperature: 1 to 40°C ambient
• Operating humidity: 5%-95% non-condensing
• Storage temperature: -40°C to 70°C
• Storage humidity: 0% to 95% non-condensing
• Shock resistance in transit without damage: 40G 10mS in any of the X, Y, Z planes
WARNINGS!
• Dimmer rack efficiency is at least 97% with standard modules. Since the remainder of the energy is dissipated as
heat, racks should be installed in a room with adequate ventilation to dissipate a heat load equivalent to at least 3%
of the maximum load the dimmer racks will handle
• Electrical equipment must not be used in close proximity to flammable materials.
• This equipment is for indoor use only
• AC Lighting Loads Only!
• The short circuit rating for this product is 50,000 AIC. Provisions can be made for optional amp trap devices to provide 100,000 AIC fault current protection, if required.
• Fan and filter choke noise emissions at some levels may be objectionable, therefore racks should be installed away
from stage and audience areas.
• Do not obstruct the ventilation at the front of the dimmer rack
• A 90 to 264VAC, 3-phase, 4-wire plus ground, 47 to 63Hz power source must be provided for processor assembly
power. Processor assemblies operate on any power source in the listed range, but the power source must be correct for the dimmers used in the system. Dimmers are available in 120V and 230VAC models. Please consult Strand
Lighting on the actual main feed size required for specific installations.
• Strand Lighting recommends that the dimmer rack power be a separate feed and that no other equipment share the
feed. Because of electrical and RF noise generated by SCR based dimmer modules, transformers having a K-factor
of 14 or more are recommended because of the high third harmonic content generated by dimming equipment.
• Do not install this equipment with power applied.
• Make sure that incoming power is disconnected before proceeding with the installation.
14 Installation
C21 Advanced Technology Dimmer Rack
2. Conduit Layout
The location of conduit runs and their entrance to the dimmer rack is important and should be carefully planned before
cutting holes or attaching conduit.
Installation Guide
Control & Load Wires
Entry Area
Top View
Figure 8: Recommended Conduit Cutouts (Top and Bottom of Rack)
Bottom Looking From Top
Feed Wires
Entry Area
WARNINGS!
• Do not run power feed or load wires in the same conduit or wireways as control and low voltage wiring.
• Do not run load cable trays and/or conduit in close proximity to any computer or computer equipment.
• Do not run wiring from other unrelated equipment in the same conduit with C21 wiring.
• Do not run control wires from dimmer rack locations marked for load or power wires, and vice versa. These lo cations are chosen to minimize electrical interference between various sections of the system.
• Do not run wiring in ways other than shown on the system riser diagram or use alternative control cables to those
specified by Strand Lighting.
• Do not substitute plastic conduit for metal conduit. Metal conduit acts as a ground and shield.
• Do not substitute shielded wiring for unshielded wiring or conduit. Changes in transmission line capacitance can
cause problems with the control signals.
Conduit Layout 15
Installation Guide C21 Advanced Technology Dimmer Rack
3. Positioning the Dimmer Rack(s)
Fan and choke noise may be objectionable if the racks are installed close to audience or performance areas. Install the
racks in dedicated mechanical rooms remotely located from the stage, audience, and acoustically "live" positions of the
performance area.
Attach the racks to a sturdy wall and to the floor . Mounting holes are provided for this purpose. Racks may be placed in
a "back-to back" configuration if they are attached securely to the floor.
23.62”
4.00”
23.62”
8.00”
3.00”
Top View
Bottom View Looking
From Top
24.36”
18.36” 3.00”
17.50”
18.00”
24.36”
Control & Load Wires
Entry Area
Feed Wires
Entry Area
12.00”
4.00”
24.36”
80.00”
77.00”
Rear Panel
Notes:
The dimmer rack must be placed on a non-combustible floor.
Installing the dimmer rack on a low concrete pad (or housekeeping pad, per the NEC) added on top of the floor is
recommended to keep the dimmer rack clear of incidental water or accidental flooding.
16 Installation
Figure 9: Mounting Dimensions
C21 Advanced Technology Dimmer Rack
Allow adequate clearance at the front of the dimmer racks for them to be opened for wiring purposes and safe
servicing.
Installation Guide
25.75”
24.36”
Door Closed
Figure 10: Clearances
24.36”
48.53”
Door Open 90º
4. Preparing the Rack for Wiring
The C21 dimmer rack is supplied without the door installed. The dimmer modules and rack processor housing are
supplied separately.
In order to gain full access to the rack, you must:
Step 1. Remove the top and bottom grills.
Step 2. Remove the thermostat "L" bracket assembly from the top cover plate. Be careful not to damage the
thermostat. A damaged or broken thermostat will render the dimmer rack inoperable.
Step 3. Remove the eight dimmer trays.
Step 4. Remove the fan housing.
WARNINGS!
• Do not remove the door from its carton.
• Do not install the dimmer rack door. This will be installed by a Strand Lighting Engineer or an Authorized Service
Center Technician as part of the system commissioning.
Preparing the Rack for Wiring 17
Installation Guide C21 Advanced Technology Dimmer Rack
5. Locating Dimmer Components
The following drawing shows the location of rack components.
18 Installation
Figure 11: C21 Dimmer Rack (door removed for clarity)
C21 Advanced Technology Dimmer Rack
6. Power Wiring
Power feed wiring can be from either the bottom or bottom sides of the dimmer rack. The phase, neutral and ground
power cables enter the rack through the bottom. All power cables are terminated using a suitable-rated compression
lug and bolted to the mains bus bars.
Installation Guide
LOAD WIRES BY CONTRACTOR
RUN ALL LOAD CABLES
BEHIND CHANNEL SUPP ORT
CONTROL W IRE BY CO NTRACTOR
ROUTE CONTROL WIRES DOWN
LEFT SIDE OF DIMMER RACK
LOAD TERMINAL BLOCKS
ETHERNET J ACK
NEUTRAL BUS
PHASEA,B,C
LEFT TO RIGHT
THERMOSTAT
FAN MO D ULE
LEAVE ENOUGH CONTROL WIRING TO
CREATE A SERVICE LOOP FOR
REMOVING THE ELECTRONICS MODULE
FAN S CR EEN CO VE R
POWER FEED BY CONTRACTOR
120VAC, 3 PHASE, 4 WIRE + GROUND
BOTTOM AN D SIDE ENTRY ONLY
120 / 208V
GROU ND LU G
Figure 12: Bus Bar Connections Behind Processor Assembly (bottom entry shown)
Connect all external power feed wiring to the dimmer rack. Internal power wiring between dimmer rack components is
pre-wired at the factory.
(2) 500 kcmil compression lugs are provided per phase and neutral bus. A ground lug is provided for earth ground
connections
CAUTION: These lugs are UL Rated for copper conductors only.
Power Wiring 19
Installation Guide C21 Advanced Technology Dimmer Rack
r
Step 1. Connect system ground to the ground lug provided.
Step 2. Connect the neutral to the neutral bus bar.
Step 3. Connect the power feeder wires to the mains bus bars.
Neutral
Bus Ba
UL Listed For Copper
Conductors Only
UL Listed For Copper
Conductors Only
Figure 13: Compression Fittings Detail
Notes:
• This equipment is intended to be installed in accordance with the National Electric Code, ANSI/NFPA 70-2002, or
the Canadian Electric Code, Part 1.
• C21 dimmer racks installed in Canada shall select wire size with 75 degree centigrade rating from table 2 or 4 of the
Canadian Electrical Code, Part 1.
• C21 dimmer racks intended for use aboard Marine V e ssels over 65 feet shall be subject to the requirements of the
USCG Electrical Engineering Regulations, subchapter J (46 CFR Part 110-1131).
20 Installation
C21 Advanced Technology Dimmer Rack
k
7. Dimmer Rack Bussing
Inter-Rack Bussing Kits can be used to interconnect the supply bus bars between adjacent C21 dimmer racks.
Three bussing kits are available:
Part # Description
76680 800A bus kit
76681 1600A bus kit
76682 2400A bus kit
Load Terminal Blocks
Installation Guide
Ethernet Jac
Power Feed By Contractor
120VAC 3 phase 4 wire + Ground
Side Entry Only 120/208V
Neutral Bus
Phase A, B, C
(Front To Back)
Figure 14: Bottom Bus Racks
Power Feed By Contractor
120VAC 3 phase 4 wire + Ground
Side Entry Only 120/208V
Ground Lug
Bus Link
Dimmer Rack Bussing 21
Installation Guide C21 Advanced Technology Dimmer Rack
A
8. Load Wiring
Load wiring is connected directly to the dimmer receptacle. Wires can be routed down channels next to the dimmer
receptacles so that they are out of the way once the rack is assembled.
CAUTION: Only hook up AC lighting loads to this equipment.
Connect load wiring according to your system drawings. Set screws in the dimmer receptacles require a standard 1/8"
Allen wrench.
Neutral wires for the 100A receptacles terminate on the neutral bus bar located at the top of the dimmer rack.
Factory
Wiring
Dual 10A & 20A
Receptacle
Figure 15: C21 Dimmer Receptacles
Dimmer connector load and neutral pins
Screw type: 1/4-20 brass
Wire gauge range: 14-6AWG
Maximum screw torque setting: 56 inch lbs.
100 amp Adaptor
Wire gauge range: 4-2AWG
Maximum screw torque setting:
20 inch lbs.
Earth bus connections:
Screw type: 1/4-28 brass
Wire gauge range: 14-6AWG
Maximum screw torque setting: 70 inch lbs.
:
Factory
Wiring
50
Receptacle
Factory
Wiring
100A
Receptacle
22 Installation
Ground Terminal
Figure 16: C21 Load Ground Terminals
C21 Advanced Technology Dimmer Rack
9. Control Wiring
Control wiring between dimmer rack components is pre-wired at the factory. Connections that go to the control
interconnection card (CIC) are in a bundle and clearly labeled.
10. Install the Rack Processor Housing
To install the Rack Processor Housing (RPH) in the dimmer rack:
Step 1. Remove the cover from the cable chute on the left side of the rack by putting your fingers in the gripper holes
and pulling up.
Step 2. Run all control cables down the cable chute.
Step 3. Punch down the Ethernet cable, if applicable.
Step 4. Replace the cable chute cover.
Step 5. Slide the electronics chassis into the rack.
Step 6. Connect the cables from the rack to the appropriate plugs on the CIC.
Step 7. Slide the electronics chassis back out of the rack until it just barely rests in its slide brackets.
Step 8. Make all control connections with the electronics chassis in this position.
CAUTION: Make sure that there is enough wire in a service loop for you to take the electronics module completely out
of the rack and put it on the floor if necessary without disconnecting any of the contractor control wiring.
Installation Guide
Run Control Cables
Down Left Side of Rack
Leave Adequate
Service Loop
Connect All Factory Cables
To Termination Board
Pull Rack ProcessorHousing
Part of The Way Out Of The
Rack Or Set On The Floor To
Make Connections.
Figure 17: Install Electronics Chassis
Control Wiring 23
Installation Guide C21 Advanced Technology Dimmer Rack
y
Connecting Power to the Rack Processor Housing
The three-phase supply to the rack processor housing (RPH) is factory wired from a termi nal block at the bottom rear
of the rack. The cable is connected to the rack processor housing by a multi-pin plug lo cated on the rear of the
housing. Sufficient cable length is allowed to permit the rack processor housing to be removed for servicing. Insert the
plug into the socket on the rear of the rack processor housing.
Secure the rack processor housing in position using the screws supplied. Check that the appropriate fuses are fitted
into the fuse block located at the bottom rear of the dimmer rack (three 8A fuses).
Some dimmer racks will contain an additional fuse block for optional emergency transfer panels. Review the Strand
Lighting system riser diagram for connection details if this additional fuse block has been supplied.
Optional Architectural
Station Power Supplies
Main Power Suppl
Optional Ethernet Switch
Figure 18: Connecting Power to the Rack Processor Housing (RPH)
CIC
Connector For
Power Cable
11. Connecting the Dimmer Control Cable Harness
Connect the dimmer control cable harnesses to the Control Interconnection Card (CIC) located on the top of the rack
processor housing. The dimmer control cable harnesses are factory wired to the dimmer slots and plug into their
dedicated connection point on the CIC. Uncoil the dimmer control cable harnesses marked ‘T1’ through ‘T6’ and ‘B1’
through ‘B6’ and connect them to the CIC board.
Power
Harness
24 Installation
C21 Advanced Technology Dimmer Rack
12. Connecting the Control Signal Wiring
C21 dimmer racks accept a variety of data signals as inputs and outputs and provide control signals to the dimmers in
the rack, together with status signals. All contractor control signal wiring is connected to the control interconnection
(CIC) card located on the top of the rack processor housing (RPH) with the exception of the Ethernet cable that is
terminated at the upper left rear of the rack. All external control wiring is run in the wire trough mounted at the rear lefthand side of the rack. Connect the Ethernet cable (supplied) to the RJ45 connector mounted on the cable trough
located at the rear-left of the dimmer rack.
Installation Guide
Rack Processor Module
Plug-In Connector
Dimmer Control
Ribbon Connectors
(T1 – T6 & B1 – B6)
Panic Select Switches
Control Input
Connectors
Fan Cable
Connector
Power Supply
Plug-In Connectors
Figure 19: Connecting Control Signal Wiring
Control Cable Routing
A cable trough is provided in the top left hand side of the rack for the control cables. Control cables should be fed
through the access holes provided in the top of the rack and run down the trough until they reach the processor area.
The trough can be removed for easy access.
Connecting the Control Signal Wiring 25
Installation Guide C21 Advanced Technology Dimmer Rack
Ethernet Control Wiring
The Ethernet control cable will terminate to the Ethernet jack located in the wireway cover at the left-rear of the dimmer
rack. The terminations are to be made using the TIA/EIA standards. T erminations are to be made using the 568B color
code.
Ethernet Jack
Orange
Orange/White
White/Green
Green
White/Brown
Brown
White/Blue
Blue
Ethernet Jack
Wiring Detail
Cat5 Cable
Belden #1583A
Ethernet Jack
Figure 20: Ethernet Wiring and Termination
Cable: Belden 1583A or Strand Lighting approved equal.
Max Length:
300 Ft.
Connector:
8-Pin RJ45
RJ45
Pin #
11TX+ 2
22TX- 2
33RX+ 3White/Green
44N/C 1Blue/White
5 5 N/C 1 White/Blue
6 6 RX- 3 Green/White
7 7 N/C 4 White/Brown
8 8 N/C 4 Brown/White
Terminal
This cable must be installed and terminated in compli ance with TIA/EIA568 standards for Category 5 cabling. Terminations are to be made using
the 568B color code.
Ethernet
number
Signal C omm ents Pairs Wire Color
White/
Orange
Orange/
White
26 Installation
Table 1: Ethernet Termination
C21 Advanced Technology Dimmer Rack
A
DMX512 Wiring
The two types of connections provided in Strand Lighting equipment for DMX512 dimmer control signals are the XLR
style connector and terminal blocks. C21 dimmer racks use pluggable terminal block connections. Wall receptacles
and consoles use XLR style connectors.
In systems that use DMX512 control wiring, the DMX512 signal is terminated at the first rack and then re-transmitted to
the other dimmer racks over the Ethernet network.
Installation Guide
Not Used 5
Not Used 4
Data + 3
Data - 2
Common 1
Dimmer Rack
Wall Receptacle
5M
Figure 21: DMX512 Wiring and Termination
Cable: Belden 9829 or Strand Lighting approved equal.
Max Length:
1000 Ft. (300m)
Connector:
5-Pin
XLR
Pin #
1 1 COMMON Dimmer Common (Shield) Shield
2 2 DATA1 - Dimmer Drive Complement Pair 1 White/Blue
3 3 DATA1 + Dimmer Drive True Pair 1 Blue/White
4 4 -- -- Pair 2 White/Orange
5 5 -- -- Pair 2 Orange/White
Terminal
Standard RS485 elec tri cal ch aracteris ti cs app ly, including line driver and receiver
characteristics, line loading, and multi-drop configurations.
Pluggable (two-piece) screw terminal block in rack, labeled DMX512 Port A and
DMX512 Port B/SWC Input. "XLR" style connectors in wall boxes and on control
consoles.
DMX512
number
Signal Comments Pairs
Wire Color
Table 2: DMX512 Termination
Connecting the Control Signal Wiring 27
Installation Guide C21 Advanced Technology Dimmer Rack
SWC/Outlook Control Wiring
Control wiring from SWC hand held controllers and stations such as Outlook is connected to the SWC/DIGITAL
NETWORK connector on the CIC. Wiring instructions and appropriate wire gauge sizes are provided on the system
riser diagram.
Main
Power Supply
5
1
4
2
3
Dimmer Output
Connectors
T1-T6 & B1-B6
Wall Station
Power Supply
(+12vdc)
Wall Station
Power Supply
(-12vdc)
Belden #9773 Cable
Drain (Shield)
LAN Data -
LAN Data +
Power +
Power +
Power -
Power -
BLK
RED
BLK
GRN
BLK
WHT
DMX Port B /
SWC Input
Figure 22: SWC/Outlook Wiring and Termination
Cable: Belden 9773 or Strand Lighting approved equal.
Max Length: 1000 feet (300m - daisy chained runs only).
Pluggable (two-piece) screw terminal block in rack, labeled DMX512
Connector:
Port B/SWC Input.
Pluggable (two-piece) screw terminal block on stations.
XLR
Pin #
Rack
Term
#
Station
Terminal
Label
Signal
Name Comments
Belden
9773
Pairs
Cable
Color
-- --- GND Ground
3 2 L- LAN Data - Network Signal Compliment Pair 1 Black
2 3 L+ LAN Data + Network Signal True Pair 1 Red
5 1 Screen SHIELD (3) Drain Wires Drain (3) Drains
4 T.B. V+ V+ +12VDC Pair 2 White/Black
1 T.B. V- V- -12VDC Pair 3 Green/Black
28 Installation
T.B.=Terminal Block
Ta ble 3: SWC/Outlook Termination
C21 Advanced Technology Dimmer Rack
m
penOpen
y
y
y
y
t
)
d
p
d
Notes:
• Wherever possible, control station runs should be single pulls directly from the first control station in a daisy-chained
run.
• Do not cut the control cable at junction or pull boxes. The control cable must be a continuous run from the rack to
the wall stations.
• If connections must be made in a junction box due to length of run or other considerations, these connections must
be soldered before installation of the wire crimp. These are not power connections. They are electronic interconnections that feed data directly to a microprocessor in the processor module. Poor connections may cause problems by
introducing electronic noise into the system, resulting in poor system operation.
Remote Contact Closure Connections
You can connect several other external contacts for controlling rack functions. These functions are then available
remotely and instantly.
Installation Guide
CONTACT CLOSURE INPUTS
CONTACT CLOSURE INPUTS
1
CONTACT CLOSURE INPUTS
PIN
FUNCTION TYPE DESCRIPTION
1
Panic ON
Momentary
Panic OFF
1 23 4 5
2
3
4
SWC Preset 1
Go Next SWC
5
6
Go SWC Off
Isolated GND
7
8
9
Isolated GND10
6
Fire Alar
O
Momentar
Momentar
Momentar
Momentar
Momentary
Figure 23: Remote Contact Closure Termination
Connector: Pluggable (two-piece) s crew terminal block in rack, labeled Contact Closure.
Pin Function Type Description
1 PANIC ON Momentary Turns Panic On
2 PANIC OFF Momentary Turns Panic Off
3 FIRE ALARM Maintained Turns Panic On, No Override
4 SWC PRESET 1 Momentary Fires SWC Preset 1
5 GO NEXT SWC Momentary Fires "Next" SWC Preset
6 GO SWC OFF Momentary Fires SWC Preset 0 (Blackout)
7COM/GND COM/GND
8OPEN OUTPUT 1
9OPEN OUTPUT 2
10 COM/GND COM/GND
Turns Panic ON
Turns Panic OFF
Turns Panic ON – No Ove r-ride
Fires SWC Preset 1
Fires ‘Next’ SWC Prese
Fires SWC Preset 0 (Blackout
Isolated Groun
Output 1
Out
ut 2
Isolated Groun
Table 4: Remote Contact Closure Termination
Connecting the Control Signal Wiring 29
Installation Guide C21 Advanced Technology Dimmer Rack
RS232 Interface
The RS232 Interface allows for third-party A/V systems to directly recall any of the 128 SWC presets that are stored in
the local rack processor housing (RPH) using serial commands.
Figure 24: A/V Interface Termination
Connector:
Pin Function
1 COMMON
2TRANSMIT - TX
3 RECEIVE - RX
4SPARE
5SPARE
Pluggable (two-piece) screw terminal block in rack,
labeled A/V Interface Port
Table 5: RS-232 A/V Interface Termination
5
4
3
2
1
5 Spare
4 Spare
3 Receive
2 Transmit
1 Common
30 Installation
C21 Advanced Technology Dimmer Rack
Select Dimmers for Panic
Panic turns any single dimmer, combination of dimmers, or all dimmers ON, bypassing system electronics.
Select panic for a dimmer using DIP switches located on the CIC. Each rack has 96 panic switches.
Dimmers with switches ON are switched ON when you activate panic, regardless of their control station settings.
Dimmers with panic select switches OFF are not affected when panic is activated. Racks are shipped with all switches
OFF.
T o activate panic:
Step 1. Press the PANIC ON button located on the front of the rack processor housing (RPH) to turn panic ON.
Step 2. If you have a remote PANIC station, press the PANIC ON button to turn selected dimmers in the rack ON.
To deactivate panic:
Step 1. Press the PANIC OFF button located on the front of the rack processor housing (RPH) to turn panic OFF.
Pressing the PANIC OFF button returns the dimmers to a NORMAL control state.
Step 2. If you have a remote PANIC station, press the PANIC OFF button to turn selected dimmers in the rack OFF.
Pressing the PANIC OFF button returns the dimmers to a NORMAL control state.
13. Installing the Door
The locking door for the rack ships from the factory in a separate box.
To install the door:
Step 1. Remove the door and hardware from the box.
Step 2. Install the hinge plates on the right or left side of the rack.
Step 3. Install the door strike on the opposite side of the hinge plate.
Step 4. Align the door to the hinges.
Step 5. Install the hinge pins to the door.
Step 6. Install the Strand Lighting nameplate to the center of the door.
Installation Guide
Dimmer Rack
Install Strike
Hinge Pin
Hinge Bracket
Door Hinge
Hinge Pin
Install Hinge Bracket
Figure 25: Installing C21 Rack Hinge Plate and Door
Install Hinge
Door
Install Jewel
Install Lock
Installing the Door 31
Installation Guide C21 Advanced Technology Dimmer Rack
LCD
A
A
COMMISSIONING
1. Safety Check
Before applying power to the system you should double-check all of your wiring.
Step 1. Check that all terminals, screws, and bolts are secure and tightened according to the torque setting.
Step 2. Check for stray wire strands and make sure wires are correctly restrained and not in contact with metal edges
or obstructing the dimmer module ventilation paths.
Step 3. Check earth ground connections.
Step 4. Double-check neutral connections and positively verify phase orientation at the input bus bars. Ensure that
neutral has not been confused with a phase - connecting the unit "across the phases" will do severe damage.
Step 5. Make a full safety inspection of all load wiring.
2. Initial Power Up
Systems purchased without Field Service commissioning are now ready for system power. For such systems, follow
the steps below. If commissioning is required, a notice appears on the riser diagram that the system should not be
energized without a factory technician present. Call and request scheduling for commissioning as early as possible.
Due to heavy scheduling requirements, the minimum time required for proper scheduling is two weeks.
Step 1. Make sure the incoming power is correctly rated per system riser. If not, correct before proceeding.
Step 2. Make sure the control input signals to the dimmer racks are off.
Step 3. Apply power to the system.
Step 4. Check that there are no lights on.
Step 5. Turn off main power to the rack and insert the rack processor module (and backup processor, if supplied).
Step 6. Turn on power to the rack.
If the system does not function properly, follow the troubleshooting instructions in the C21/EC21 Operation Guide. If
these steps fail, or for assistance with replacement parts, please call Strand Lighting or the local Authorized Service
Center in your area.
3. Processor Self Test and Fault Identification
Once you have applied power you need to make sure that the system is working correctly and the rack processor
modules are set properly for the installation. This step checks for any problems due to shipping or installation.
When the rack is switched ON, a number of self-tests are run. If no faults are detected, the system displays the default
message as shown:
Status LED’s
NETWORK CONNECTI O N
DMX512 RDM PORT
DMX512 PORT B
PROCESSOR OK
MODULE EVENT
CTIVE PROCESSOR
32 Commissioning
Figure 26: Rack Processor Module (RCM) Front Panel
Control Keypad
C21 Advanced Technology Dimmer Rack
4. Rack Processor Housing LEDs
LED Status
The LEDs on the front of each rack processor module are the first level of diagnostics and provide immediate visual
status indication. The nine LEDs on the front of the rack processor housing and module indicate the following:
Phase A (green): Should be ON if Phase 1 is OK.
Phase B (green): Should be ON if Phase 2 is OK.
Phase C (green): Should be ON if Phase 3 is OK.
Over-Temp (red): Should be OFF. Flashing indicates an Over-Temp condition. ON in dicates dimmer module
automatic Over-Temp shutdown.
Panic (red): Should be OFF. On indicates that PANIC has been activated.
Lighthouse (blue): Blue = normal. Flashing red = error. Solid red = shutdown.
Rack Processor Module LEDs
Network Connection (green):Should be ON if there is a network signal.
DMX512 A (green): Should be ON if there is a DMX512 signal.
DMX512 B (green): Should be ON if there is a DMX512 signal.
Module Event (red): Should be OFF. On indicates a dimmer fault
Processor OK (green): Should be ON. Off indicates there is a problem.
Active Processor (green): Should be ON if self-test is OK. Indicates active processor.
Installation Guide
Dimmer Events
If the Module Event LED is on, the LCD will show the number of dimmer events and will automatically scroll the display
to show a description of the event(s) Refer to the C21/EC21 Operation Guide for a description of event codes. If any
other LED does not illuminate correctly, switch OFF the power immediately and check the installation again. If the fault
persists and all wiring seems correct, call Strand Lighting.
If the LCD shows an error, see the Error Log section of the C21/EC21 Operation Guide.
5. Output Check
Gradually increase the control signal to each dimmer in turn from 0% to 100% using the SET LEVEL function and
carefully monitor the loads. Check for any error messages, or dimmer events displayed on the rack processor module
LCD.
Rack Processor Housing LEDs 33
Installation Guide C21 Advanced Technology Dimmer Rack
6. Initial Programming
Refer to the C21/EC21 Operation Guide and set the following menu items, as applicable:
• Language
• Rack number (if applicable)
• Fan Speed Control
• LCD Contrast
• Time and date
Other items you may wish to set at this time, depending on your system configuration, are:
• DMX512 patch
• DMX512 Mode
• Outlook patch
• Max Voltage
• Min Level
• Circuit ID Start
• Circuit ID Patch
• Dimmer Response
• Dimmer Profiles
• No DMX512 Preset or Hold condition.
• Power Up Preset
7. Programming and Fault-Finding
Refer to the C21/EC21 Operation Guide supplied with the dimmer rack for Basic Troubleshooting instructions and
details on how to use the rack processor module keypad and LCD display to program all the functions of the C21
dimmers.
34 Commissioning
C21 Advanced Technology Dimmer Rack
Notes
Installation Guide
Programming and Fault-Finding 35
Installation Guide C21 Advanced Technology Dimmer Rack
Notes
36 Commissioning
C21 Advanced Technology Dimmer Rack
Notes
Installation Guide
Programming and Fault-Finding 37
Part No: 2-450173-040 (Rev. A)
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