QSC DDI-11 User manual

DDI-11
Installation Guide
TD-000181-00-B
*TD-000181-00*

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EXPLANATION OF SYMBOLS
The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed the result may be bodily injury or death.
The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it may result in
damage to the equipment that may not be covered under the warranty.
The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of the procedure.
The term "NOTE" is used to indicate additional useful information.
The intent of the lightning flash with arrowhead symbol in a triangle is to alert the user to the presence of un-insulated "dangerous"
voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
The intent of the exclamation point within an equilateral triangle is to alert the user to the presence of important safety, and operating
and maintenance instructions in this manual.
IMPORTANT SAFETY INSTRUCTIONS
WARIRNG: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with a dry cloth.
• Do not block any ventilation opening. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Only use attachments/accessories specified by the manufacturer.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as 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.
• Adhere to all applicable, local codes.

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Warranty (USA only; other countries, see your dealer or distributor)
QSC Audio Products 3 Year Limited Warranty
QSC Audio Products, LLC (”QSC”) guarantees its products to be free from defective material and/or workmanship and will replace defective parts
and repair malfunctioning products under this warranty when the defect occurs under normal installation and use, provided the unit is returned to
our factory, one of our authorized service stations or an authorized QSC International Distributor via pre-paid transportation with a copy of proof
of purchase (i.e., sales receipt). This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing
defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the
date code has been removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific legal
rights. This limited warranty is freely transferable during the term of the warranty period. The warranty on QSC products is NOT VALID if the products
have been purchased from an unauthorized dealer/online e-tailer, or if the original factory serial number has been removed, defaced, or replaced in
any way. Damage to, or loss of any software or data residing on the product is not covered. When providing repair or replacement service, QSC will
use reasonable efforts to reinstall the product’s original software configuration and subsequent update releases, but will not provide any recovery or
transfer of software or data contained on the serviced unit not originally included in the product.
Customers may have additional rights, which vary from state to state or from country to country. In the event that a provision of this limited warranty is
void, prohibited or superseded by local laws, the remaining provisions shall remain in effect.
The QSC limited warranty is valid for a period of three (3) years from date of purchase in the United States and many (but not all)
other countries.
For QSC warranty information in countries other than the United States, contact your authorized QSC international distributor. A list of QSC
International distributors is available at www.qscaudio.com.
To register your QSC product online, go to www.qscaudio.com and select ”Product Registration”. Other questions regarding this warranty can be
answered by calling, e-mailing or contacting your authorized QSC distributor.
Phone: [phone] within US and Canada, [phone] international, Email: [email protected], Website: www.qscaudio.com.
Technical Assistance
If you suspect that your DDI-11 card is defective, check your system configuration and connections to determine the origin of the problem. In
many cases, incorrect audio interfacing, poor cabling, or other system level impairments are the causes of problems in audio systems. For technical
assistance beyond the information given in this manual, contact the QSC Technical Services department.
Factory Service
If your DDI-11 card ever requires factory service, contact the QSC Technical Services department for return instructions and a Return Material
Authorization (RMA) number. QSC is not responsible for products returned without an RMA number, or follow the return instructions at http://www.
qscaudio.com/support/technical_support/factory_services.htm.

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Introduction
The DDI-11 DataPort Accessory Card is designed for use with QSC amplifiers equipped with a DataPort
connector. It provides an easy way to exploit the features of the DataPort without using QSControl or an
accessory. In addition, the DDI-11 can be used on a DataPort outputs of a Basis or Q-Sys I/O card to provide
access to the audio signals. Refer to Outputs below.
Refer to Figure 1 and Figure 2.
Through a terminal block with eight screw clamps on the DDI-11, the DataPort offers these connections:
• Balanced input to Channel 1 of an amplifier, or output of Basis or Q-Sys I/O card.
• Balanced input to Channel 2 of an amplifier, or output of Basis or Q-Sys I/O card.
• Analog (signal) ground.
• Chassis ground.
• Standby control of an amplifier; connecting this terminal to chassis ground shuts off the power supply, except on ISA Series amplifiers.
• +15 volts (at up to 300 mA) from amplifier, except on ISA and the original
PowerLight Series1amplifiers.
The screw clamp terminals can accept stranded wire as large as 17 AWG (1 mm2) or
solid wire as large as 16 AWG (1.5 mm2).
The DDI-11 card mounts onto the DataPort connector on the back of the amplifier,
Basis or Q-Sys I/O card, and secures with two screws. A small sheet of insulating fish
paper protects the underside of the card.
To guard against oxidation, corrosion, or contamination, the circuit board is treated
with non-toxic protectants. Therefore, it may have a slight odor and a slightly oily-
feeling residue. Do not wash the protectant off the circuit board.
Inputs
Each channel of the amplifier has a balanced input connection on the terminal block (see Figure 2). Each input comprises two terminals, + (in polarity)
and - (out of polarity). For optimum immunity to noise, use a balanced connection whenever it is possible.
For an unbalanced connection, connect the signal conductor of the cable to the + input and the shield to the - input; also, connect a short jumper wire
between the - input and the analog ground terminal.
With the amplifier channel at full gain, the input sensitivity (for 8-ohm loads) of the DataPort input is approximately 3 volts rms (+11.8 dBu).
Outputs
The DDI-11 may also be used to connect to any DataPort connector on QSControl MultiSignal Processors, Basis, and Q-Sys products. Used this way,
the DDI-11’s four signal input terminals now become signal outputs, allowing you to use the audio signals for whatever purpose you require. The
standby and power supply terminals cannot be used in this application.
On/Off Control
A switch closure between the chassis ground and the standby terminals will put the amplifier’s power supply in standby for all DataPort amplifiers
except the ISA. Opening the closure will restart the power supply, with no inrush current surge. The standby terminal is isolated through a diode,
so you can gang together any number of amplifiers equipped with DDI-11 cards to be controlled by a single switch closure. ISA Series amplifiers,
however, do not have this feature.
— Figure 1 —
300mA
IN 1+
IN 1-
AGND
IN 2-
IN 2+
STBY
CGND
+15V
J1 J2
©
2004 QSC AUDIO
VM2
IM2
PROT
IM1
VM1
The DDI-11 and its
control/monitoring connections
— Figure 2 —
300mA
IN 1+
IN 1-
AGND
IN 2-
IN 2+
STBY
CGND
+15V
+15V (ref: CGND) supply
Chassis Ground
Power Suppy Standby
+
-
Analog (Signal) Ground
-
+
Channel 2 Balanced Input
Channel 1 Balanced Input
}
}
Eight screw clamp terminals offer connections
for audio, remote on/off control, and a 15-volt DC supply.
1. The original PowerLight Series comprises the models PL 1.0, PL 1.0HV, PL 1.4, PL 1.5X, PL 1.6HVX, PL 1.8, PL 2.0HV, PL 2.4MB, PL 3.4, PL 4.0, PL 6.0PFC, PL 6.0 II,
and PL 9.0PFC. It does not include the PowerLight 2 & 3 Series, which can be used to provide accessory power.

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Power Supply
The +15 volt output is referenced to the chassis ground terminal and will provide up to 300 mA from the amplifier to power custom accessories or
other devices. The output is protected from short circuits or excessive current draw by a self-resetting polyswitch fuse.
The +15 volt terminal on ISA and original PowerLight Series1amplifiers, however, cannot provide enough current to power external circuitry. Doing so
may damage an ISA amplifier or an original PowerLight amplifier.
Installation
Packing List
QSC part # FG-000951-00
• DDI-11 board
• Two #4-40 × ¼” black screws
• Installation guide
Procedure
1. Turn off the amplifier, Basis, or Q-Sys device.
2. Plug the card into the DataPort. Use the two screws on each side of the DataPort to secure it; do not overtighten them.
3. To attach wires to the DDI-11 terminal strip, strip about 5 mm (0.2”) of insulation from the wire. Twist the exposed wire strands together and make
sure there are no stray ones. Turn the screw on the terminal counterclockwise until you can fully insert the wire end into the terminal. Turn the
screw clockwise until the terminal clamps the wire securely. Repeat for all the wires needed. The terminal can accept stranded wire up to 17 AWG
(1 mm2) or solid wire up to 16 AWG (1.5 mm2) in size.
The device is ready for use.

Mailing Address:
QSC Audio Products, LLC
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
Main Number: [phone]
Sales & Marketing: [phone] or toll free (USA only) [phone]
Customer Service: [phone] or toll free (USA only) [phone]
Facsimile Numbers:
Sales & Marketing FAX: [phone]
Customer Service FAX: [phone]
World Wide Web:
www.qscaudio.com
E-mail:
[email protected]
[email protected]
© 2011 QSC Audio Products, LLC. All rights reserved. QSC™ and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and
other countries. Tilt-Direct, Intrinsic Correction, DEEP and GuardRail are all trademarks of QSC Audio Products, LLC. powerCON is a registered trademark of Neutrik.
All other trademarks are the property of their respective owners. US and Worldwide Patents pending.