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DN504
OPERATORS MANUAL
Klark Teknik Group,
Klark Teknik Building,
Walter Nash Road,
Kidderminster.
Worcestershire.
DY11 7HJ.
England.
Tel:+44 1562 741515
Fax:+44 1562 745371
Email: sales@ktgplc.com
Website: www.klarkteknik.com
DN504Plus Quad Compressor/Limiter Operators Manual
(c) Klark Teknik Group (UK) PLC.
In line with the company’s policy of continual improvement, specifications and function may be
subject to change without notice. This Operators Manual was correct at the time of writing. E&OE.
Issue 1.1 - September 2004DOC02-DN504+
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IMPORTANT SAFETY INSTRUCTIONS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE
AVIS: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR
These symbols are internationally accepted symbols that warn of potential hazards with
electrical products.
The lightning flash with arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product's enclosure that may be of
sufficient magnitude to constitute ariskof electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any of the ventilation openings. Install in accordance with the manufacturers
instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding
prong. The wide blade or the third prong are provided for your safety. If the provided plug does not
fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.
11. Only use attachments / accessories specified by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods of time.
13. Refer all servicing to qualified personnel. Servicing is required when the apparatus is damaged in
any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
IEC-60065-Edn7-KT
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Walter Nash Road, Kidderminster, Worcestershire. DY11 7HJ. England
Tel: +44 1562 741515. Fax: +44 1562 745371
Company Registration No: 2414018
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SIGNAL PROCESSING BY DEFINITION DESIGNEDFOR APUREPERFORMANCE
DECLARATION OF CONFORMITY
Klark Teknik Group (UK) PLC
We,
of, Klark Teknik Building, Walter Nash Road, Kidderminster, Worcestershire, DY11 7HJ
Declare that a sample of the following product:-
Product Type Number Product Description Nominal Voltage (s) Current Freq
DN504 Plus Quad Compressor / 115V AC 200mA
Limiter 230V AC
100mA
to which this declaration refers, is in conformity with the following directives and/or standards:-
Directive(s) Test Standard(s)
89/336/EEC Electromagnetic Compatibility Directive
amended by 92/31/EEC & 93/68/EEC 73/23/EEC,
Low Voltage Directive, amended by 93/68/EEC
Generic Standard Using EN55103 Limits and Methods EN50081/1
Class B Conducted Emissions Pavi EN55103
Class B Radiated Emissions Pavi EN55103
Fast Transient Bursts at 2kV EN61000-4-4
Static Discharge at 4kV EN61000-4-2
Electrical Stress Test EN60204
Electrical Safety UL6500-99
EN60065:1998
E60065-00
50/60Hz
Signed:............................
Date: 15th September 2003
Name: Simon Harrison
Authority: Research and Development Director, Klark Teknik Group (UK) PLC
Attention!
Where applicable, the attention of the specifier, purchaser, installer or user is drawn to special limitations of use
which must be observed when these products are taken into service to maintain compliance with the above
directives. Details of these special measures and limitations to use are available on request and are available
in product manuals.
A Subsidiary of Telex communications, Inc.
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Contents
The Klark Teknik DN504 1
After you unpack 3
Introduction 5
Instrument Familiarisation
Front panel controls 7
Rear panel controls 8
Audio Connections 9
Using the DN504 11
Compression
Setting the Controls 13
Limiting
12
15
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Application notes
Linking to the Console 17
Applications using the Side Chain 18
De-essing 19
Ducking 20
Technical Specification 21
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.
The Klark Teknik DN504
Thank you for selecting the Klark Teknik DN504 Plus quad compressor / limiter. The unit continues the Klark
Teknik tradition of providing superb audio performance, technical accuracy and rugged reliability.
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Precautions
Do not install this unit in a location subjected to excessive heat, dust or mechanical vibration.
Voltage Selection and Power Connection
Connection is made by means of an IEC standard power socket. The rear panel text indicates the voltage range
required for satisfactory operation of the unit.
Before connecting this unit to the mains supply, ensure the fuse fitted is the correct type and rating is as
indicated on the rear panel, adjacent to the fuse holder.
Safety Warning
This unit is fitted with a standard fused IEC mains inlet: For safety reasons the earth lead should never be
disconnected.
To prevent shock or fire hazard, do not expose the unit to rain or moisture. To avoid electrical shock do not
remove covers. Refer servicing to qualified personnel only.
Attention! Cables
This product should only be used with high quality, screened twisted pair audio cables, terminated with metal
bodied 3-pin XLR connectors. Any other cable type or configuration for the audio signals may result in
degraded performance due to electromagnetic interference.
Electric Fields:
Should this product be used in an electromagnetic field that is amplitude modulated by an audio frequency
signal (20Hz to 20kHz), the signal to noise ratio may be degraded. Degradation of up to 60dB at a frequency
corresponding to the modulation signal may be experienced under extreme conditions (3V/m, 90%
modulation).
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After You Have Unpacked The Unit
Save all the packing materials - they will prove valuable should it become necessary to transport or ship this
product.
Please inspect this unit carefully for any signs of damage incurred during transportation. It has undergone
stringent quality control inspection and every possible effort has been made to ensure that it left the factory in
perfect condition.
If, however, the unit shows any signs of damage, please notify the transportation company without delay.
Only you, the consignee, may institute a claim against the carrier for damage during transportation.
If necessary, contact your supplier or as a last resort, your Klark Teknik importing agent, who will fully cooperate under such circumstances.
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Side Up
This
KIDDERMINSTER ENGLAND
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Introduction
The Klark Teknik DN504 Plus Quad Compressor/Limiter has been designed to give the studio or PA
engineer comprehensive and convenient automatic control over gain and level. Four channels of
compression are available in one unit of nineteen inch rack space. Even at this high packing density, the
degree of control over each channel of audio is greater than that found on many conventional two channel
compressor/limiters.
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As a Compressor, the DN504 can achieve almost undetectable dynamic range reduction by the use of
sophisticated automatic attack and release circuitry. Or compression can be used as an effect in its own
right with full manual control over Threshold, Ratio, Attack, Release and Gain. There is also a switchable
'Knee' control which provides the option of Hard or Soft compression styles.
With the compression ratio set to the maximum value of 50:1, the DN504 is also able to operate as a
high quality, fast acting, Limiter.
The DN504 has light indicators for every switched audio function, and also has separate light bar
graph meters for gain reduction and for output level on each channel.
Four side chain inputs are provided. A stereo link function is available to allow channels to be linked in
pairs to compress stereo signals while avoiding the possibility of image shift.
The DN504 Quad Compressor/Limiter is built to Klark Teknik's high standards of design and
construction. A well thought out aesthetic presentation is also an aid to realising full dynamic control over
gain and level in today's complex productions.
Plus
Plus
Plus
Plus
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6
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Instrument Familiarisation: Front Panel Controls
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7
6
1
2
9
8
3
4
10
11
5
12
The DN504 Plus Quad Compressor/Limiter consists of four identical channels.
1. determines the level above which gain reduction (compression) will take place, variable
Threshold
from +20dBu down to -30dBu. The Gain Reduction light bar graph meter indicates in decibels by
how much the signal is compressed at any instant.
2. sets the degree of compression applied above the threshold level, variable from 1:1 to 50:1. A
Ratio
ratio of 1:1 corresponds to zero compression: Signal In = Signal Out. A ratio of 10:1 indicates that
when the input signal, above the threshold, rises in level by 10dB, the output level will rise 1dB.
3. sets the time taken for compression to commence after the threshold is exceeded, from 0.05
Attack
milliseconds (50 microseconds) to 20 milliseconds.
4. determines the time taken for the gain to return to normal after the signal drops below the
Release
threshold level, adjustable from 60 milliseconds to 2 seconds.
5. is used to restore level lost as a result of the compression process, variable from -10dB to
Gain
+30dB.
6. The switch selects the channel to be in or out of circuit.
7. The Gain Reduction five-stage light bar graph meter indicates by how much the signal is
In
(GR)
compressed at any instant.
8. links together pairs of channels of the DN504 Plus for compressing stereo signals. Channel
Stereo
1 operates as the master for Channel 2, which becomes the slave. Channels 3 and 4 can be linked in
the same way. In Stereo mode, the unit still monitors the levels of both channels of each pair to detect
when the signal is above the threshold level (on channels 2 and 4, the Stereo switch is replaced by a
'Stereo Slave' light indicator).
9. allows the setting of attack and release times to be automatic or manual. On Auto, the attack
Auto
time of the input signal and the amount by which it exceeds the threshold level are assessed, and
suitable Compressor/Limiter attack and release values set to give an almost undetectable reduction in
signal dynamic range. On Manual, the rotary Attack and Release controls come into operation.
10. , is switchable between a 'Hard' and 'Soft' compression effect. A hard knee means that when the
Knee
input signal level rises above the threshold, it is immediately compressed at the full ratio as set. Asoft
knee means that compression will start below the threshold level at a low ratio and gradually attain the
full ratio selected only at higher levels.
11. The output level three-stage light indicates OUTPUT level when the channel is
bar graph meter
switched in circuit. When the channel is bypassed, the meter indicates INPUT level.
12. switches mains power on or off.
Power
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Instrument Familiarisation: Rear Panel Controls
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18
19
115/220-240V
CUS
14
13. is supplied via an IEC standard 3-pin connector. A compatible power cord is supplied with the
Mains
13
15
17
1
NEUTRIK
16
PUSH
1
2
2
3
3
NEUTRIK
NEUTRIK
1
2
3
NEUTRIK
1
2
3
NEUTRIK
1
2
3
NEUTRIK
1
2
3
NEUTRIK
1
2
3
NEUTRIK
unit.
14. The is located in a fuse holder fitted to the rear panel. Always replace with the correct type
mains fuse
and rating as indicated on the unit.
15. This unit is switchable between two nominal supply voltages, 115V and
Voltage selector switch.
220/240V, via a slide switch. The switch MUST be set before the supply is connected. Any attempt
to run the unit from a 220/240V supply with the switch set to 115V is liable to result in severe damage
to the unit.
Note: Units for the Japanese market do not have an accessible mains voltage selector switch and are set for 100V
operation only.
16. Signal is made via a female XLR type connector.
17. Signal is available on a male XLR type connector. For wiring details see page 9 of this
Input
Output
manual.
18. is made via a ¼ inch typeAstereo jack connector.
19. Always quote the in any correspondence concerning the unit.
External Side Chain Input
Serial Number
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Audio Connections
Input
The input circuit is a transformerless, electronically balanced design which achieves a symmetry of better
than- 50dB from 20Hz to 10kHz.
If transformer balancing of the input is required, this must be specified at the time of order. It is not
retrofittable.
Output
The standard output is unbalanced, but balancing transformers are available and may be retrospectively
fitted. Please contact your Klark Teknik representative for more information. The output circuitry is capable
of driving a 600 ohm load at a level of +22dBu.
Input
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Output
Unbalanced
2
Unbalanced
1
Balanced
1
3
3
1 Gnd
2 Gnd
3 Hot
Balanced
1 Gnd
2
2 Gnd
3 Hot
2
1
3
1
2
3
1 Gnd
2 Cold
3 Hot
1 Gnd
2 Cold
3 Hot
Pin 2 / Pin 3 Hot Operation
The unit is configured for pin 3 hot operation but can be re-configured to the standard pin 2 hot XLR wiring
convention. This is done by changing the internal jumpers located next to the connectors on the PCB from a
horizontal to a vertical configuration, as illustrated below. Please contact your Klark Teknik service
representative for further details, if required.
Pin 3 hot Pin 2 hot
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Side Chain/EXT Key Inputs
The electronically balanced Side Chain inputs are on stereo ¼ inch typeAjack sockets, configured:
TIP = HOT, RING = COLD, SLEEVE = EARTH.
Inserting a mono jack plug will automatically unbalance the input.
1/4” Stereo Jack
HOT
COLD
GND
Out
Thru
In
The sockets are internally normalled so that signal continuity is maintained when there is no jack plug
inserted. If the unit is wired to a patchbay,then normalling must be carried out at the patchbay.
Balanced Circuits
Transformer or electronically balanced connections have the benefit of Common Mode Rejection which
eliminates externally induced interference, such as mains hum etc. Balancing is especially useful when long
cable runs are used between pieces of equipment.
Transformer balanced circuits have the added advantage of being fully floating, with the earth (ground) or
screen being totally isolated from the signal. In installations where a difference in earth potential is likely to
occur,this isolation prevents earthing problems which can, in some cases, damage the equipment.
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Using the DN504
The natural sounds of life have an extremely wide dynamic range, from the rustle of a falling leaf to the roar of
a jet engine on take off. The human ear has an automatic gain control which enables it to accommodate all of
these sounds from the threshold of hearing to close to the threshold of pain, a dynamic range of approximately
120 decibels.
Even the most modern equipment is incapable of handling the full range that the ear can cope with. Analogue
tape without noise reduction can manage almost 70 decibels dynamic range between its noise floor and the
3% distortion point. 16-bit digital audio equipment can achieve over 90dB. Still almost 30dB less than the
ear's range. Even if a 120dB dynamic range were possible in audio equipment, would it be desirable and
useful? A listener in a domestic setting enjoying the exhilarating effects of a 96dB Sound Pressure Level will
almost certainly be causing his neighbour a significant amount of annoyance, if not distress! At the other end
of the dynamic scale, a typical ambient noise level of at least 40dB SPL precludes the use of very quiet levels
in recorded or broadcast sound media.
Almost always, it is necessary to compress the dynamic range of natural sounds to fit them into a window
suitable both for the equipment and for comfortable listening.
The Compressor/Limiter is a valuable tool for the control of dynamic range. Compression and Limiting
reduce and control the dynamic range of any instrument or programme source.
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Compression and Limiting have their artistic uses too. The sounds of instruments and voices can be altered.
Amix of instruments can be compressed to give a 'tighter' dynamic effect. Or individual voices or instruments
can be treated to give a musical effect unobtainable by any other means.
The DN504 Plus Quad Compressor/Limiter offers in a compact unit versatile control over dynamic range, for
corrective and for artistic purposes.
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Compression
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One of the principal uses of compression is the control of level in vocals. Many singers train for years to
achieve the degree of breath control necessary for an even tone and expressive performance. Other vocalists
rely on an instinctive voice production technique, which may need help in the studio to maintain a consistent
level, and result in a vocal track which 'sits' correctly in the mix.
The level of a vocal may vary widely, and appear like the unprocessed signal in the diagram :
Threshold level
Signal Level
Threshold level
Unprocessed signal
Time
Signal Level
Signal Level
Threshold level
3:1 Compression above threshold
With gain make up
Diagram 1
Time
Time
The unprocessed signal has a large dynamic range between the highest and lowest levels. Applying
compression reduces the highest levels, reducing the dynamic range. Because the peak level of the signal is
now lower, make-up gain is added to restore the original peak level. The result is a much more controlled and
usable sound.
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Compression: Setting The Controls
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Threshold
sets the level above which compression takes place. Signals below the threshold will remain
unaltered. Turning the control clockwise lowers the threshold level and allows more of the signal to be
compressed.
Ratio
is the 'strength' of compression above the threshold level. The higher the ratio, the greater the effect.
+20
+10
-10
Output level (dB)
Input level (dB)
+10
+20
-20
-10
+20
+10
-10
Output level (dB)
Input level (dB)
+10
+20
-20
-10
-20
2:1
-20
12:1
Diagram 2
At a compression ratio of 2:1, the effect is mild and suitable for the subtle compression of vocals or of a
complete mix. At 12:1, compression is becoming stronger and more noticeable. Ratios between 3:1 and 15:1
are suitable for the 'compressor' sound, used as an effect in its own right. Higher ratios are used for the control
of extremely peaky signals.
The point where the slope of the Compressor curve changes is knows as the .
Knee
The DN504 Plus has an
adjustable knee, variable between 'Hard' and 'Soft':
Soft Knee
10:1
1:1
Hard Knee
10:1
1:1
Increasing signal level
Increasing signal level
Diagram 3
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With a soft knee, signals which only just exceed the threshold level are compressed at a low ratio, the ratio
increasing the higher the signal level.
Attack
sets the time the Compressor takes to respond once the threshold has been exceeded. Attack may be
set so that the initial transient of the instrument passes through unaltered, or set to a faster value so that the
very start of the sound is compressed. Particularly with drum sounds, careful adjustment of attack time can
make the sound more 'punchy' and 'driving'.
Release
time plays a very important role in compression. During periods of high signal level, gain is reduced.
When the signal level falls below the threshold, the gain will increase at a rate determined by the Release
control. If the release time is short, the gain will rise quickly. A long release time will mean that the gain will
stay at its reduced level, only recovering gradually :
Signal Envelope
Signal Level
Input signal
Time
Signal Level
Signal Level
Fast release
Time
Slow release
Time
Diagram 4
The setting of the correct release time is a compromise. If the release time is too short, background noise can
cause effects often known as 'breathing' and 'pumping'. If the release time is too long, the signal will not be
compressed, but simply reduced in level. For effective compression, the release time must be set to as short a
value as possible before modulation of the background noise becomes too noticeable. The gain reduction bar
graph meter will show how much actual compression is going on. If it stays steady, there is little active
compression, just a steady-state reduction in level. The faster the bar graph moves up and down, the harder
the Compressor is working.
For a natural unnoticeable compression, attack and release times may be set to Auto. The signal
characteristics are continuously monitored for optimum values.
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Limiting
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By switching any channel of the to Auto Attack/Release, and setting the compression ratio to a
high value greater than 20:1 the acts as a high quality Quad Limiter.
DN504 Plus
DN504 Plus
A Limiter acts as a last check on signal level. If the level goes over the threshold, fast acting, high ratio
compression is applied to bring it back within bounds.
Threshold level
Signal Level
Unprocessed signal
Threshold level
Time
Signal Level
Limiting
Time
Diagram 5
If a compression effect is required together with limiting of high level transients, two channels of the
Plus
may be cascaded. The output of Channel 1, compression, is fed to the input of Channel 2, limiting. This
gives powerful two stage control over gain:
+20
Output level (dB)
+10
Compressor 2 Threshold
Compressor 1 Threshold
-20
-10
1:1
-10
Input level (dB)
+10
+20
DN504
-20
Diagram 6
Below the compression threshold, the signal is unaltered. In this example, above the first threshold, it is
compressed at a mild 2:1 ratio. Above the second threshold it is firmly limited at a ratio of 50:1.
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Applications: Interfacing with a console
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The Klark Teknik DN504 Plus Quad Compressor/Limiter is optimised for use at line level, therefore to
process the signal from a microphone, the input to the DN504 Plus has to be taken from the console preferably
from the channel insert point send. The output from the DN504 Plus comes back to the channel insert return.
By connecting the DN504 Plus at this position in the signal chain, its operation is unaffected by the use of any
of the console controls, except Input Gain.
Channel Insert Point
Send
Mic Input
Return
Diagram 7
Output
Input
An alternative is connection to the group insert point of the console :
This connection has two uses : the input from the microphone may be compressed post EQ, which offers an
alternative sound quality which may be desirable in some cases. Alternatively, several instruments may be
compressed together in the mix to achieve a 'harder' sound.
Group Insert Point
Send
Mic Input
Return
Diagram 8
Output
Input
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Applications: Side chain inputs
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Each channel of the has a input, in addition to the normal audio signal input.
In normal use, the amount of compression or limiting is related to the dynamics of the input signal. The Side
Chain allows the signal passing through the unit to be controlled by the dynamics of another separate signal.
Connection to the Side Chain input is made via the rear panel jack sockets. See 'Audio Connections', page 9.
Side ChainDN504 Plus
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Applications: De-essing
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De-essing is an important compression technique using the Side Chain. Many singers have high level
sibilants 'sss' sounds which detract from their performance. Equalising the signal will reduce the sibilants,
but also make the overall vocal sound dull.
The sibilants can be selectively removed by compressing only when there is an excessive level of high
frequencies. Here is one way to do it :
Mic Input
(Channel routed
to group)
Insert Send
(channel 1)
Line In
(channel 2)
Aux Send
Send
Return
Diagram 9
Output
Input
Compressor side
chain input
The microphone channel is routed to a group with the Compressor patched into the group insert points. The
microphone channel is also parallelled into another channel via the line input. The signal in the second
channel is equalised so that high frequencies in the sibilant range are boosted. This channel is fed via an
auxiliary output to the Compressor Side Chain input.
Now, the Compressor will react whenever there is a sibilant, reducing the gain for the duration of the sibilant
and cleaning up the vocal sound.
This technique can also be used to compensate for a 'boomy' bass, or other situations where a band of
frequencies is occasionally obtrusive.
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Applications: Ducking
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If speech is to be mixed with music from a stereo source, it is best if the music is dropped in level during the
speech, and raised during pauses. This can be done automatically by passing the music through Channels 1
and 2 of the and patching the microphone into the Side Chain input of Channel 1 :
Mic Input
DN504 Plus
Stereo
Source
Send
Channel Insert Point
Channel Insert Points
Send
Return
Send
Return
Output
Diagram 10
Input
Channel 1
Output
Since stereo music is to be controlled by an input into the Side chain of just one channel of the , the
Input
Channel 2
Channel 2
Side chain inputs
Channel 1
DN504 Plus
Stereo link button must be pressed. To prevent the music input to Channel 2 affecting the degree of
compression, an open circuit jack plug must be inserted in the Side Chain input of Channel 2 to break away the
jack socket's switch connection.
Now whenever the voice over artist speaks, the music will be reduced in level by the compressor. When he is
silent, the music will rise back in level to take up the full available dynamic range.
The Klark Teknik Quad Compressor/Limiter packs a lot of processing power into a small rack
DN504 Plus
space. Engineers will find it convenient to use and will also enjoy its creative potential.
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DN504 Technical Specifications
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1
NEUTRIK
1.5s
80
PUSH
1
3
1
2
2
3
NEUTRIK
CUS
1
1.5s
80
115/220-240V
Audio Inputs Four
Type Electronically Balanced
Impedance (ohms)
Balanced 20k
Unbalanced 10k
Side Chain Inputs Four
Type Electronically Balanced
Impedance (ohms)
Balanced 20k
Unbalanced 10k
Audio Outputs Four
Type Unbalanced
Minimum Load Impedance 600 ohms
Source Impedance <60 ohms
Maximum Level +21dBu
1
1
2
2
3
NEUTRIK
NEUTRIK
1.5s
80
PUSH
1
3
1
2
3
NEUTRIK
NEUTRIK
1
PUSH
1
2
3
1.5s
80
PUSH
1
3
NEUTRIK
1
2
2
3
NEUTRIK
Performance
Frequency Response +/- 0.5dB
(20Hz -20kHz)
Distortion (THD+N) <0.03% @ 1kHz
(@ +4dBu, 20Hz-20kHz)
Equivalent Input Noise -94dBu
(20Hz-20kHz unweighted)
Channel Separation >90dB @ 1kHz
Compressor
Threshold -30dB to +20dB
Ratio 1:1 to 50:1
Knee Switchable, 1dB (hard) / 40dB (soft)
Envelope Switchable auto (attack and release controls disabled)or Manual
Attack (90% capture) 0.05ms to 20ms
Release (90% recovery) 60ms to 2s
Output Gain -10dB to +30dB
Limiter/Clipper
Threshold 0dB to +20dB
Power Requirements
Voltage 110 / 115 / 220 - 240V, 50/60Hz
Consumption <30VA
Termination
Audio Inputs / Outputs 3-pin XLR
Side Chain Inputs normalled ¼ inch stereo jack
Power 3-pin IEC
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Dimensions
Width 482mm (19 inch)
Depth 292mm (11 ½ inch)
Height 44.5mm (1 ¾ inch)
Weight
Nett 4 kg
Shipping 6kg
Options
Security cover
Transformer input*/output balancing
*Input transformer balancing is non-retrofittable and has to be specified with order.
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Options Ordering Information
Perspex security cover SCP DN514Plus
Aluminium security cover SCA.DN514Plus
Output balancing transformer BU37
Input balancing transformer BN37
Parts Number
22
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