OPERATING INSTRUCTIONS
MULTICHANNEL POWER AMPLIFIERS
DA-550F CU
DA-500F-HL CU
TABLE OF CONTENTS
1. IMPORTANT SAFETY INSTRUCTIONS ... 2
2. SAFETY PRECAUTIONS ........................... 3
3. GENERAL DESCRIPTION ......................... 4
4. FEATURES ................................................. 4
5. HANDLING PRECAUTIONS ...................... 5
6. INSTALLATION PRECAUTIONS .............. 5
13. CLEANING THE FILTER .......................... 14
14. DIMENSIONAL DIAGRAM ........................ 14
15. BLOCK DIAGRAMS
15.1. DA-550F ............................................ 15
15.2. DA-500F-HL ...................................... 15
16. HOW TO USE THE CONTROL/MONITOR TERMINALS
16.1. Control Terminal (Input) .................... 16
16.2. Monitor Terminal (Output) ................. 16
16.3. About Pin 7 of the Control/Monitor
Terminals .......................................... 17
16.4. Terminal Pin Arrangement ................ 17
16.5. Connection Cable and
7. NOMENCLATURE AND FUNCTIONS
Front ............................................................ 6
Rear ............................................................ 7
8. SETTINGS AND CONNECTIONS ............... 9
8.1. Switch Settings and Speaker Connections ... 10
Maximum Cable Length .................... 17
16.6. RJ45 Connector's Pin Arrangement
and Cable Color Codes ..................... 18
9. REMOVABLE TERMINAL PLUG
CONNECTION ........................................... 12
10. INPUT SENSITIVITY SETTING ................. 13
11. PROTECTION OPERATION LIST ............ 13
12. TAMPER-PROOF CAP ATTACHMENT ... 14
17. SPECIFICATIONS
17.1. DA-550F CU ..................................... 19
17.2. DA-500F-HL CU ................................ 20
Thank you for purchasing TOA's Multichannel Power Amplifier.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
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2. SAFETY PRECAUTIONS
•
Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or
cautions regarding safety.
• After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
CAUTION
• To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
WARNING
as modification inside the unit to qualified service
components inside the unit. Refer all servicing such
When Installing the Unit
personnel.
• Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
• Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.
• Use the unit only with the voltage specified on the
unit. Using a voltage higher than that which is
specified may result in fire or electric shock.
• Do not insert nor drop metallic objects or flammable
materials in the ventilation slots of the unit's cover,
as this may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock.
• Do not touch a plug during thunder and lightning,
as this may result in electric shock.
CAUTION
• Be sure to replace the unit's terminal cover after
connection completion. Because the voltage of up
to 140 V is applied to the high impedance speaker
terminals, never touch these terminals to avoid
electric shock. (DA-500F-HL only)
When Installing the Unit
• Never plug in nor remove the power supply plug with
wet hands, as doing so may cause electric shock.
• External wiring connected to the terminals marked
with requires installation by an instructed person.
• When unplugging the power supply cord, be sure to
grasp the power supply plug; never pull on the cord
itself. Operating the unit with a damaged power
supply cord may cause a fire or electric shock.
• The apparatus shall be connected to a mains
socket outlet with a protective earthing connection.
• When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
When the Unit is in Use
• Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest TOA dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock.
· If you detect smoke or a strange smell coming
from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of
the core, disconnection, etc.)
• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
• To avoid electric shocks, be sure to switch off the
unit's power when connecting speakers.
· If it is malfunctioning (no tone sounds.)
3
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• The unit is designed exclusively to be mounted in
an equipment rack. Be sure to follow the
instructions below when rack-mounting the unit.
Failure to do so may cause a fire or personal injury.
· Install the equipment rack on a stable, hard floor.
Fix it with anchor bolts or take other arrangements
to prevent it from falling down.
· Be sure to use the screws with a diameter of over
5 mm (0.2") and length of over 12 mm (0.47") to
mount the unit.
• Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
• Contact your TOA dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result.
• If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
· When connecting the unit's power cord to an AC
outlet, use the AC outlet with current capacity
allowable to the unit.
• Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
When the Unit is in Use
• With the HPF ON/OFF switch kept to the OFF
position (factory preset), operating the unit for long
periods of time while the Peak indicator is
illuminated due to excessive input signal may
damage the connected speakers, possibly resulting
in fire. Operating the unit with the HPF ON/OFF
switch set to the ON position may decrease the
possibility of speaker damage or fire due to
excessive input signal.
An all-pole mains switch with a contact
separation of at least 3 mm (0.12") in each pole
shall be incorporated in the electrical
installation of the building.
• Make sure that all volume controls are set to
minimum position before power is switched on.
Loud noise produced at high volume when power is
switched on can impair hearing.
The lighting 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 a risk of
electric shock to persons.
3. GENERAL DESCRIPTION
TOA's DA-550F Multichannel Power Amplifier features high power handling of 550 W x 4 channels (4 Ω
output) or 350 W x 4 channels (8 Ω output) and durability. TOA's DA-500F-HL Multichannel Power Amplifier
features high power handling of 500 W (70 V line) x 4 channels (9.8 Ω output), or 550 W x 4 channels (8 Ω
output), or 100 W x 4 channels (4 Ω output) and durability.
Channels 1 and 2, and 3 and 4 are made available for bridge connection individually, allowing the DA-550F to
be used as a 1,100 W (8 Ω) X 2 channels amplifier, or the DA-500F-HL as a 1,000 W (140 V line) x 2
channels (19.6 Ω) amplifier or 1,100 W x 2 channels (16 Ω) amplifier. When a bridge connection is made,
each model can be used as a 2-channel stereo amplifier or as a 3-channel amplifier.
Their wide range of applications include stores and permanent sound systems.
4. FEATURES
• 2U rack mounting size*.
• Low power consumption and light weight.
• An input signal to Channel 1 can be routed to all channels, and the output level adjusted using the input level
control for each channel.
• Electronically-balanced inputs.
• Input terminals employ removable terminal blocks and XLR type connectors to provide maximum connection
ease.
• Input/output status LED indicators for each channel.
• Built-in protection circuitry disconnects the output when a short circuit, overload, or unusual temperature rise
occurs.
• Equipped with the terminals used for internal information monitoring (power supply, protection status, and
fan operation) and power ON/OFF control from external equipment.
* 1U size = 44.5 mm or 1.75" (reference size)
4
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5. HANDLING PRECAUTIONS
• Keep the input cable away from the output cable. If installed close to each other, oscillation could occur.
• To avoid unit failures, never connect outputs of 2 or more units in parallel.
• Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller than specified impedance could cause damage to the unit.
• Periodically clean the filter located inside the ventilation panel on the unit's front panel. If the filter becomes
clogged, heat will become trapped inside the enclosure.
• Install the unit in locations where the temperature is between –10°C and +40°C (14°F and 104°F) and the
moisture is less than 90%RH (no dew condensation must be formed).
• To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty,
use a cloth damped in a neutral cleanser. Never use benzene, thinner, alcohol, or chemically-treated
cleaning cloth because such volatile liquids could deform or discolor the unit.
6. INSTALLATION PRECAUTIONS
Rack mounting screws are not supplied with the unit.
Be sure to use the screws with a diameter of over 5 mm (0.2") and
CAUTION
length of over 12 mm (0.47") to mount the unit.
Failure to do so may cause personal injury.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
To achieve sufficient ventilation, remove all panels on the rear of the rack.
• When mounting the unit in the rack, also mount a Perforated Panel larger than 1U in size*:
(1) at the top and the bottom of the rack, and
(2) above and below every 5 units.
Power amplifiers
DA-550F/500F-HL
Perforated panel
Power amplifiers
DA-550F/500F-HL
* 1U size = 44.5 mm or 1.75" (reference size)
5
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7. NOMENCLATURE AND FUNCTIONS
[Front]
3
4
5
2
1
DA-550F
DA-500F-HL
1. Power switch [ ON/OFF]
4. Ventilation panel (Air Vent)
Power is switched on and off with each depression
of this switch.
A filter is located inside the ventilation panel.
To clean the filter, remove the ventilation panel.
(See p. 14; Cleaning the Filter.)
2. Power indicator [POWER]
5. Indicators [INPUT, OUTPUT, PEAK, PROTECT]
Lights blue when the power is switched on.
The indicators are as follows from left to right:
• Input indicator [INPUT]
3. Input level controls
Lights green regardless of the input level
control setting when an input signal level
exceeds about –20 dB.
[CH 1/BRIDGE 1, CH 2, CH 3/BRIDGE 2, CH 4]
Adjust the input level of each channel.
• Output indicator [OUTPUT]
Lights yellow when an output level exceeds
about 1 W at an 8 Ω load (DA-550F) or 9.8 Ω
load (DA-500F-HL).
When a bridge connection is made
• When Channels 1 and 2 are bridge-connected
(BRIDGE 1 ON/OFF switch (10) is set to ON),
the CH 1/BRIDGE 1 level control adjusts the
input levels of Channels 1 and 2. In this event,
the CH 2 level control cannot be used.
• Peak indicator [PEAK]
Lights red when an output signal clips
(distortion occurs).
• When Channels 3 and 4 are bridge-connected
(BRIDGE 2 ON/OFF switch (10) is set to ON),
the CH 3/BRIDGE 2 level control adjusts the
input levels of Channels 3 and 4. In this event,
the CH 4 level control cannot be used.
• Protection indicator [PROTECT]
Lights red when the protection circuitry is
activated. (See p. 13; Protection Operation
List.) When the power is switched on, this
indicator lights for about 2 seconds and then
extinguishes.
6
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[Rear]
6
7
7
8
8
9
9
9
9
10 11 10
DA-550F
12
6
10 11 10
DA-500F-HL
12
13
6. AC power cord (2 m or 6.56 ft)
Caution when using an XLR type plug
The socket-outlet shall be installed near the
equipment and the plug (disconnecting device)
shall be easily accessible.
If a straight plug hits the rack's rear cover or
wall behind the rack when it is used for
connection, use the L-shaped plug instead.
7. Control/Monitor terminals
10. BRIDGE ON/OFF switches
[CONTROL/MONITOR]
[BRIDGE 1, BRIDGE 2,
ON /
OFF]
Connecting external equipment to these terminals
makes the control and monitor functions available
for channels 1 – 4 individually.
(See p.16; How to Use the Control/Monitor
Terminals.)
Used when bridge-connecting the unit's
Channels 1 and 2, and Channels 3 and 4.
(See p. 9; Settings and Connections.)
• 4-channel input mode
Set both BRIDGE 1 and 2 switches to OFF.
(factory-preset)
8. Speaker output terminals [OUTPUTS]
(with a terminal cover )
• 3-channel input mode
Set either BRIDGE 1 or 2 switches to ON.
When bridge-connecting Channels 1 and 2, set
BRIDGE 1 switches to ON, and BRIDGE 2
switches to ON when bridge-connecting
Channels 3 and 4.
Connect speaker cables to these terminals.
9. Input terminals [INPUTS]
Electronically-balanced input terminals.
Each removable terminal block (3 pins) is
internally connected in parallel to the
corresponding XLR type connector.
• 2-channel input mode
Set both BRIDGE 1 and 2 switches to ON.
• Removable terminal block (3 pins)
H: Hot, C: Cold, E: Earth
Note
Be sure to first turn off the power switch when
changing the BRIDGE switch settings.
•
XLR type male connector (XLR-3-31 equivalent)
Pin 1: Earth, Pin 2: Hot, Pin 3: Cold
7
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11. CH 1 mode ON/OFF switch
[CH 1 TO ALL, ON / OFF]
13. HPF ON/OFF switch (DA-500F-HL only)
Input signals to CH1 – CH4 can be filtered
through the High-pass filters having 6 dB
attenuation at a cut-off frequency of 50 Hz.
Set the DIP switch to the "ON" position to switch
on the filter, and set it to the "OFF" position to off
the filter.
Setting this switch to ON (pressed in) transmits
the Channel 1 input signal to all channels. Output
signal levels can be individually adjusted with
each channel's input level control (3).
Note
Note
The DIP switch is factory-preset to the "OFF"
position.
Be sure to first turn off the power switch when
changing the CH 1 mode switch settings.
12. Functional ground terminal [SIGNAL GND]
Hum noise may be generated when external
equipment is connected to the unit. Connecting
this terminal to the functional ground terminal of
the external equipment may reduce the hum
noise.
When a bridge connection is made
Perform high-pass filter setting with the CH1
DIP switch when Channels 1 and 2 are
bridge-connected (Set the Bridge 1 ON/OFF
switch (10) to ON). (Filter setting for the
CH2 is disabled.)
Note
This terminal is not for protective ground.
Similarly, perform the filter setting with the
CH3 DIP switch when Channels 3 and 4 are
bridge-connected. (Set the Bridge 2
ON/OFF switch (10) ON). (Filter setting for
the CH4 is disabled.)
8
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8. SETTINGS AND CONNECTIONS
CH 1 mode ON/OFF switch
BRIDGE 2 ON/OFF switch BRIDGE 1 ON/OFF switch
[Rear panel]
HPF ON/OFF switch
(DA-500F-HL only)
Speaker output terminals
(with a terminal cover)
Input terminals
Note: The figure shows the DA-500F-HL.
Step 1. Switch off the unit's power.
Step 2. Set the BRIDGE ON/OFF switches and CH 1 mode ON/OFF switch.
Step 3. Set the HPF ON/OFF switch. (DA-500F-HL only)
HI-PASS: –6 dB/oct, cut off frequency 50 Hz
FLAT:
OFF
CAUTION
With the HPF ON/OFF switch kept to the OFF position (factory
preset), operating the unit for long periods of time while the Peak
indicator is illuminated due to excessive input signal may
damage the connected speakers, possibly resulting in fire.
Operating the unit with the HPF ON/OFF switch set to the ON
position may decrease the possibility of speaker damage or fire
due to excessive input signal.
Step 4. Connect the sound source equipment to the Input terminals.
Note: Refer to p. 12 for the removable terminal plug connection.
10 mm
(0.39”)
Step 5. Connect speakers to the Speaker output terminals.
5-1. Unscrew the output terminal cover.
5-2. Strip 10 mm (0.39") of insulative jacket from the end of the speaker
cable, as shown in the figure at right.
5-3. Connect speaker cables to the output terminals.
5-4. Replace the output terminal cover in place.
Be sure to replace the unit's terminal cover after connection completion.
Because high voltage is generated at the speaker output terminals,
never touch these terminals to avoid electric shock. (DA-500F-HL only)
WARNING
9
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8.1. Switch Settings and Speaker Connections
Speaker output terminals
[4 inputs - 4 outputs] (factory-preset)
CH4 CH3 CH2 CH1
-
+
-
+
-
+
-
+
CH1
CH2
CH3
CH4
Switch
Setting
OFF
DA-550F DA-500F-HL
CH1
CH2
CH3
CH4
BRIDGE 1
BRIDGE 2
CH 1 mode
4 – 8 Ω
4 – 9.8 Ω
OFF
OFF
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
Speaker output terminals
[1 input - 4 outputs]
CH4 CH3 CH2 CH1
-
+
-
+
-
+
-
+
CH1
CH1
Switch
Setting
OFF
OFF
ON
DA-550F DA-500F-HL
BRIDGE 1
BRIDGE 2
CH 1 mode
CH2
CH3
CH4
4 – 8 Ω
4 – 9.8 Ω
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
[2 inputs - 2 outputs]
Speaker output terminals
CH1
CH1
Switch
Setting
ON
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
-
+
BRIDGE 2
BRIDGE 1
CH2
ON
DA-550F DA-500F-HL
OFF
CH3
CH3
8 Ω
8 Ω
16 – 19.6 Ω
16 – 19.6 Ω
CH4
[1 input - 2 outputs]
Speaker output terminals
CH1
CH1
Switch
Setting
ON
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
-
+
BRIDGE 2
BRIDGE 1
CH2
CH3
CH4
ON
DA-550F DA-500F-HL
ON
8 Ω
8 Ω
16 – 19.6 Ω
16 – 19.6 Ω
10
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Speaker output terminals
[3 inputs - 3 outputs (1)]
CH2 CH1
-
+
-
+
CH1
CH1
Switch
Setting
OFF
ON
DA-550F DA-500F-HL
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
BRIDGE 2
4 – 8 Ω
4 – 9.8 Ω
CH2
CH2
CH3
CH3
OFF
4 – 8 Ω
8 Ω
4 – 9.8 Ω
16 – 19.6 Ω
CH4
Speaker output terminals
[3 inputs - 3 outputs (2)]
CH4 CH3
-
+
-
+
CH1
CH1
Switch
Setting
ON
OFF
OFF
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
BRIDGE 1
CH2
DA-550F DA-500F-HL
8 Ω
16 – 19.6 Ω
CH3
CH3
4 – 8 Ω
4 – 8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
CH4
CH4
Speaker output terminals
[1 input - 3 outputs (1)]
CH2 CH1
-
+
-
+
CH1
CH1
Switch
Setting
OFF
ON
DA-550F DA-500F-HL
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
BRIDGE 2
4 – 8 Ω
4 – 9.8 Ω
CH2
CH3
CH4
ON
4 – 8 Ω
8 Ω
4 – 9.8 Ω
16 – 19.6 Ω
Speaker output terminals
[1 input - 3 outputs (2)]
CH4 CH3
-
+
-
+
CH1
CH1
Switch
Setting
ON
OFF
ON
BRIDGE 1
BRIDGE 2
CH 1 mode
-
+
BRIDGE 1
CH2
CH3
CH4
DA-550F DA-500F-HL
8 Ω
16 – 19.6 Ω
4 – 8 Ω
4 – 8 Ω
4 – 9.8 Ω
4 – 9.8 Ω
11
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9. REMOVABLE TERMINAL PLUG CONNECTION
Cautions
• Be sure to use shielded cables for audio signal lines.
• Avoid soldering cable conductor, as contact resistance may increase when the cable is tightened and the
solder is crushed, possibly resulting in an excessive rise in joint temperatures.
• Use cables of AWG 12 – 24.
Cable end treatment
7 mm
Shielded cable
(0.28”)
20 mm
(0.79”)
Connector connections
Step 1. Loosen the terminal screw, then insert the cable.
Step 2. Retighten the terminal screw. (Pull on the cable to ensure it is securely connected.)
Slotted screwdriver
Tightens
Loosens
2
1
Terminal screw
1
Hot
Removable terminal plug
Earth
Cold
Shielded cable
Tip
Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm (0.12") in width
Bit shape 3 mm (0.12”)
12
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10. INPUT SENSITIVITY SETTING
The input sensitivity for each channel can be set to either +4 dB (factory preset) or –10 dB.
CAUTION
These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to
do so. Refer all servicing to qualified service personnel.
Step 1. Unscrew 9 screws securing the top cover
of the unit, then detach it.
[When set to +4 dB]
[When set to –10 dB]
Step 2. Insert the jumper socket into either "+4 dB"
or "–10 dB" position as shown at right.
– 1 0 d B / + 4 d B
– 1 0 d B / + 4 d B
Jumper
socket
Jumper
socket
When a bridge connection is made;
Set the input sensitivity with the CH1
jumper socket when Channels 1 and 2 are
bridge-connected. Similarly, set the input
sensitivity with the CH3 jumper socket
when Channels 3 and 4 are bridge-
connected. (Input sensitivity settings for
the CH2 and CH4 are disabled.)
(Factory-preset)
Step 3. Replace the detached top cover.
CH 1
CH 2
CH 3
CH 4
Front panel
Viewed from top with the top cover detached.
11. PROTECTION OPERATION LIST
Failure
Protection
Operation Indicator
Remedy
Recovery
Overcurrent due Current limiter activated Peak indicator lights. Remove overload.
Connecting a correct load
automatically restores
normal operation.
to overload
when impedance drops
below the specified
value.
Short circuit
Current limiter activated. Protection indicator
Check speakers and
lines for short circuit.
Turn off the power switch.
Correct the load, then
switch on the power.
Load is disconnected.
lights.
Temperature rise Load disconnected.
at power amp.
Protection indicator
lights.
Check the unit for
Operation automatically
correct ventilation and returns to normal when
heat sink
overload.
the temperature decreases.
(over 100°C)
Temperature rise Built-in amplifier unit
Four indicators of
the corresponding
channel extinguish.
at power supply
heat sink
that caused the failure
halted.
(over 80°C)
Abnormal DC
voltage output
Load disconnected.
Protection indicator
lights.
Contact the TOA dealer where the unit was
purchased.
13
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12. TAMPER-PROOF CAP ATTACHMENT
To protect the input level control from accidental operation,
it is recommended to replace the control knob with the
supplied tamper-proof cap as illustrated.
Input level control
Tamper-proof cap
(accessory)
13. CLEANING THE FILTER
Step 1. Switch off the unit's power.
Step 2. Remove the ventilation panel as shown in the figure.
Step 3. Detach the filter inside the ventilation panel.
Step 4. Clear the filter of dust.
Step 5. Replace the filter and ventilation panel.
Ventilation Panel
Ventilation Panel
2
3
Detach the panel by pressing
on the right side.
Filter
14. DIMENSIONAL DIAGRAM
442 (17.4)
Unit: mm (inches)
465 (18.31)
482 (18.98)
14
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15. BLOCK DIAGRAMS
15.1. DA-550F
CH 1
CH 1 INPUT
OUTPUT
OUTPUT 1
relay
H
C
E
+
-
Current Limiter
Short Detector
+4 dB
10 dB
CH 1
input level
control
-
Protection Circuit
BRIDGE 1
OUTPUT
CH 1 sensitivity
OUTPUT 2
relay
CH 2 INPUT
CH 3 INPUT
selection jumper
ON
(+4 dB/-10 dB)
H
C
E
+
-
Current Limiter
Short Detector
OFF
CH 2
BRIDGE 1 ON/OFF switch
OUTPUT
+4 dB
10 dB
CH 2
Protection Circuit
input level
control
-
CH 3
OUTPUT
CH 2 sensitivity
OUTPUT 3
relay
selection jumper
(+4 dB/-10 dB)
H
C
E
+
-
Current Limiter
Short Detector
+4 dB
10 dB
CH 3
input level
control
-
Protection Circuit
BRIDGE 2
OUTPUT
CH 3 sensitivity
OUTPUT 4
relay
selection jumper
CH 4 INPUT
ON
(+4 dB/-10 dB)
H
C
E
+
-
Current Limiter
Short Detector
OFF
CH 4
CH 1 TO ALL
switch
BRIDGE 2 ON/OFF switch
OUTPUT
+4 dB
10 dB
CH 4
Protection Circuit
input level
control
-
CH 4 sensitivity
selection jumper
(+4 dB/
-
10 dB)
15.2. DA-500F-HL
CH 1 INPUT
CH 1
OUTPUT
OFF
ON
H
C
E
OUTPUT 1
HPF
relay
50 Hz
+
-
CH 1
HPF ON/OFF
switch
Current Limiter
Short Detector
+4 dB
CH 1
input level
control
-10 dB
Protection Circuit
BRIDGE 1
OUTPUT
CH 1 sensitivity
CH 2 INPUT
CH 3 INPUT
OFF
ON
OUTPUT 2
relay
selection jumper
H
C
E
ON
(+4 dB/-10 dB)
HPF
+
50 Hz
-
CH 2
HPF ON/OFF
switch
Current Limiter
Short Detector
OFF
CH 2
BRIDGE 1
OUTPUT
+4 dB
10 dB
ON/OFF switch
CH 2
Protection Circuit
input level
control
-
CH 3
OUTPUT
OFF
ON
CH 2 sensitivity
OUTPUT 3
relay
selection jumper
H
C
E
HPF
(+4 dB/-10 dB)
50 Hz
+
CH 3
-
HPF ON/OFF
switch
Current Limiter
Short Detector
+4 dB
10 dB
CH 3
input level
control
-
Protection Circuit
BRIDGE 2
OUTPUT
CH 3 sensitivity
CH 4 INPUT
OFF
ON
OUTPUT 4
relay
selection jumper
ON
H
C
E
(+4 dB/-10 dB)
HPF
+
50 Hz
-
CH 4
Current Limiter
Short Detector
HPF ON/OFF
switch
OFF
CH 1 TO ALL
switch
CH 4
BRIDGE 2
OUTPUT
+4 dB
10 dB
ON/OFF switch
CH 4
Protection Circuit
input level
control
-
CH 4 sensitivity
selection jumper
(+4 dB/-10 dB)
15
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16. HOW TO USE THE CONTROL/MONITOR TERMINALS
The Control/Monitor terminals on the rear panel permit power ON/OFF control of the individual channels and
monitoring for the power ON/OFF status and protection status on each channel, and fan operation status.
Prepare the control panel and status monitor display panel separately referring to the descriptions below.
Note
All terminals are electrically isolated from the unit body with the photocouplers.
16.1. Control Terminal (Input)
While the unit's power switch is turned ON, each individual channel's power can be turned ON and OFF from
the distant location using this terminal. The power indicator extinguishes only when the all channels' powers
are turned off, but otherwise remains lit.
Using the power supply, which you need to prepare separately, perform the control by applying DC voltage to
the control terminal.
This terminal is a photocoupler input, and requires max. 8 mA per control. Note the power capacity of the
power supply.
Control voltages are as follows.
Terminal pin No.
Control voltage (Vin) Power ON/OFF status on each channel
Pin 1 or 4
External DC power
(Max. 14 V DC)
0 – 3 V DC
ON
Vin
9 – 14 V DC
OFF
Pin 7
When controlling the control terminal with a power supply of 14 V DC or more, connect the specified
resistance referring to the table below.
Note: The use of the resistance other than those specified may cause unit failure.
Control voltage (Vin)
14 V to under 20 V DC
20 V to under 30 V DC
30 V to under 50 V DC
R1 resistance value (rated power)
1 kΩ (0.1 W or more)
Terminal pin No.
Pin 1 or 4
R1
External DC power
(Max. 50 V DC)
3.3 kΩ (0.25 W or more)
5.6 kΩ (0.5 W or more)
Vin
Pin 7
16.2. Monitor Terminal (Output)
Indicators on the externally-connected device (status monitor display panel) or relays can be turned on and off
in response to the power ON/OFF status, protection status, and fan operation status from the distant location
using this terminal.
This monitor terminal is a photocoupler open-collector output terminal. Note that it is rated at withstand
voltages of 30 V DC and control current of 12 mA or less when ON.
At the time of circuit design, consider the control current assuming that 1 V appears at the monitor terminal
when ON.
[Example of a circuit]
When an LED is used
When a relay is used
External DC power
(Max. 30 V DC)
External DC power
(Max. 30 V DC)
Control current:
12 mA or less
Control current:
12 mA or less
Terminal pin No.
Pin 2, 3, 5, 6, or 8
Terminal pin No.
Pin 2, 3, 5, 6, or 8
Pin 7
Pin 7
Note
Be sure to connect a diode across the relay in the direction
as shown above when connecting to the external relay.
16
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16.3. About Pin 7 of the Control/Monitor Terminals
A ground common to all the control and monitor terminals is assigned to Pin 7.
Both Pins 7 of the Control/Monitor terminal for CH1 and CH2, and that for CH 3 and CH4 are internally
connected to each other.
Pins 7 are isolated from the unit body.
16.4. Terminal Pin Arrangement
Unit operation status
Terminal Pin No.
Pin name
HI-LEVEL
CH1 power OFF
CH1 normal
LO-LEVEL
CH1 power ON
CH1, 2
CH1 power ON/OFF control (input)
CH1 protection status (output)
CH1 power ON/OFF status (output)
CH2 power ON/OFF control (input)
CH2 protection status (output)
CH2 power ON/OFF status (output)
GND (input/output)
CH1 protection activated (irregular)
CH1 power ON
CH1 power OFF
CH2 power OFF
CH2 normal
CH2 power ON
CH2 protection activated (irregular)
CH2 power ON
CH2 power OFF
Fan operation status (output)
CH3 power ON/OFF control (input)
CH3 protection status (output)
CH3 power ON/OFF status (output)
CH4 power ON/OFF control (input)
CH4 protection status (output)
CH4 power ON/OFF status (output)
GND (input/output)
Fan stop (irregular) Normal
CH3, 4
CH3 power OFF
CH3 normal
CH3 power ON
CH3 protection activated (irregular)
CH3 power ON
CH3 power OFF
CH4 power OFF
CH4 normal
CH4 power ON
CH4 protection activated (irregular)
CH4 power ON
CH4 power OFF
Fan operation status (output)
Fan stop (irregular) Normal
• About operation and terminal status
HI-LEVEL
LO-LEVEL
Control terminal (input)
Monitor terminal (output)
9 – 14 V DC
OFF
0 – 3 V DC
ON
• The same information is output from both Pins 8 (fan status output) of the CH1 and CH2 terminal, and the
CH3 and CH4 terminal.
• Lighting status of the protection indicator on the front panel matches operation of protection status provided
at the monitor terminal.
Protection indicator (front panel)
Protection status (output)
Light off
OFF
Light on
ON
16.5. Connection Cable and Maximum Cable Length
For the connection cable, use a Category 5 twisted pair cable for LAN (CAT5-UTP).
The maximum cable length is 600 m (656.17 yd).
17
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16.6. RJ45 Connector's Pin Arrangement and Cable Color Codes
To Control/Monitor terminal
Cable color
Cable color
(for T568A)
RJ45 pin No.
(for T568B)
Orange/white
Orange
RJ45 pin No.
Green/white
Green
1
2
3
4
5
6
7
8
Green/white
Blue
Orange/white
Blue
Blue/white
Green
Blue/white
Orange
Brown/white
Brown
Brown/white
Brown
Category 5 twisted pair cable for LAN
(CAT5-UTP)
18
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17. SPECIFICATIONS
17.1. DA-550F CU
Power Source
120 V AC, 50/60 Hz
Amplification system
Power Consumption
Digital class D
480 W (based on UL/CSA standards), 2800 W (rated output 4 Ω),
1650 W (rated output 8 Ω)
Input
4 circuits, +4 dB* (1.23 V, input level control in maximum position),
10 kΩ, electronically-balanced, removable terminal block (3 pins),
XLR-3-31 type connector
CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch)
Rated Output
4 channels: 550 W x 4 (4 Ω), 350 Wx 4 (8 Ω)
2 channels (BRIDGE): 1,100 W x 2 (8 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35")
Frequency Response
20 – 20,000 Hz (–2 dB, +1 dB)
Total Harmonic Distortion 0.1% (1 kHz), 0.15% (20 – 20,000 Hz)
Protection circuit
Protection against excessive current flow due to overload, short circuit,
unusual DC voltage output, and heat sink temperature rise (over 100°C)
S/N Ratio
100 dB (A-weighted)
70 dB (A-weighted)
Crosstalk
Control/Monitor
Control input:
Power ON/OFF status of the individual channels
Photocoupler input
drive voltage: 9 V DC (Min) – 14 V (Max), 12 V (Typ)
Monitor output:
Power ON/OFF status of the individual channels, Protection
status of the individual channels, Fan operation status
P
hotocoupler open collector output
withstand voltage: 30 V DC
control current: under 12 mA
Connector:
RJ45 connector x 2
Connection cable: Category 5 twisted pair cable for LAN (CAT5-UTP)
Maximum cable distance: 600 m (656.17 yd)
LED Indicator
Power (blue) x 1, Input (green) x 4, Output (yellow) x 4, Peak (red) x 4,
Protect (red) x 4
Cooling
Forced air cooling
Operating Temperature
Operating Humidity
Finish
–10°C to +40°C (14°F to 104°F)
Under 90% RH (no condensation)
Panel: Aluminum, black, alumite
Case: Plated steel sheet
Dimensions
Weight
482. (w) x 88.4 (h) x 404.2 (d) mm (18.98" x 3.48" x 15.91")
8.8 kg (19.4 lb)
* 0 dB = 0.775 V
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Removable terminal plug (3 pins) ........................................ 4
Tamper-proof cap ................................................................ 4
19
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17.2. DA-500F-HL CU
Power Source
Amplification system
Power Consumption
Input
120 V AC, 50/60 Hz
Digital class D
480 W (based on UL/CSA standards), 2600 W (rated output 8 Ω x 4)
4 circuits, +4 dB* (1.23 V, input level control in maximum position),
10 kΩ, electronically-balanced, Removable terminal block (3 pins),
XLR-3-31 type connector
CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch)
HPF ON/OFF switch (–6 dB/oct, cut off frequency 50 Hz)
Rated Output
4 channels: 500 W x 4 (9.8 Ω, 70 V line), 550 Wx 4 (8 Ω), 100 W x 4 (4 Ω)
2 channels (BRIDGE): 1,000 W x 2 (19.6 Ω), 1,100 W 2 (16 Ω)
M4 screw terminal, distance between barriers: 8.8 mm (0.35")
Frequency Response
20 – 20,000 Hz (–2 dB, +1 dB): HPF OFF
50 – 20,000 Hz (–3 dB, +1 dB): HPF ON
Total Harmonic Distortion 0.1% (1 kHz)
0.3% (20 – 20,000 Hz): HPF OFF
0.3% (100 – 20,000 Hz): HPF ON
Protection circuit
Protection against excessive current flow due to overload, short circuit,
unusual DC voltage output, and heat sink temperature rise (over 100°C)
S/N Ratio
100 dB (A-weighted)
70 dB (A-weighted)
Crosstalk
Control/Monitor
Control input:
Power ON/OFF status of the individual channels
Photocoupler input
drive voltage: 9 V DC (Min) – 14 V (Max), 12 V (Typ)
Monitor output:
Power ON/OFF status of the individual channels, Protection
status of the individual channels, Fan operation status
Photocoupler open collector output
withstand voltage: 30 V DC,
control current: under 12 mA
Connector:
RJ45 connector x 2
Connection cable: Category 5 twisted pair cable for LAN (CAT5-UTP)
Maximum cable distance: 600 m (656.17 yd)
LED Indicator
Power (blue) x 1, Input (green) x 4, Output (yellow) x 4, Peak (red) x 4,
Protect (red) x 4
Cooling
Forced air cooling
Operating Temperature
Operating Humidity
Finish
–10°C to +40°C (14°F to 104°F)
Under 90% RH (no condensation)
Panel: Aluminum, black, alumite
Case: Plated steel sheet
Dimensions
Weight
482. (w) x 88.4 (h) x 404.2 (d) mm (18.98" x 3.48" x 15.91")
8.8 kg (19.4 lb)
* 0 dB = 0.775 V
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Removable terminal plug (3 pins) ........................................ 4
Tamper-proof cap ................................................................ 4
133-22-102-60
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