OPERATING INSTRUCTIONS
MULTICHANNEL POWER AMPLIFIERS
DA-550F CE
DA-500FH CE
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.
Note: The figure shows the DA-550F.
2
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS ............................................................................... 3
2. GENERAL DESCRIPTION ............................................................................. 4
3. FEATURES .......................................................................................................... 4
4. HANDLING PRECAUTIONS .......................................................................... 5
5. INSTALLATION PRECAUTIONS ................................................................. 5
6. NOMENCLATURE AND FUNCTIONS
Front ......................................................................................................................... 6
Rear .......................................................................................................................... 7
7. SETTINGS AND CONNECTIONS
7.1. Switch Settings and Speaker Connections
7.1.1. When using the DA-550F ......................................................................... 8
7.1.2. When using the DA-500FH .................................................................... 10
8. REMOVABLE TERMINAL PLUG CONNECTION .................................. 11
9. INPUT SENSITIVITY SETTING .................................................................... 12
10. PROTECTION OPERATION LIST ............................................................... 12
11. TAMPER-PROOF CAP ATTACHMENT .................................................... 13
12. CLEANING THE FILTER ................................................................................ 13
13. DIMENSIONAL DIAGRAM ............................................................................ 13
14. BLOCK DIAGRAMS
14.1. DA-550F ......................................................................................................... 14
14.2. DA-500FH ...................................................................................................... 14
15. HOW TO USE THE CONTROL/MONITOR TERMINALS
15.1. Control Terminal (Input) ................................................................................. 15
15.2. Monitor Terminal (Output) .............................................................................. 15
15.3. About Pin 7 of the Control/Monitor Terminals ................................................ 16
15.4. Terminal Pin Arrangement ............................................................................. 16
15.5. Connection Cable and Maximum Cable Length ............................................. 16
15.6. RJ45 Connector's Pin Arrangement and Cable Color Codes ........................ 17
16. SPECIFICATIONS
16.1. DA-550F CE ................................................................................................... 18
16.2. DA-500FH CE ................................................................................................ 19
3
When Installing the Unit
• 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.
• 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 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.
• Be sure to replace the unit's terminal cover after
connection completion. Because the voltage of up
to 100 V is applied to the high impedance speaker
terminals, never touch these terminals to avoid
electric shock. (DA-500FH only)
• External wiring connected to the terminals marked
with requires installation by an instructed person.
• The apparatus shall be connected to a mains
socket outlet with a protective earthing connection.
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.)
· If it is malfunctioning (no tone sounds.)
• To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing such
as modification inside the unit to qualified service
personnel.
• 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.
• 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 touch a plug during thunder and lightning,
as this may result in electric shock.
When Installing the Unit
• Never plug in nor remove the power supply plug with
wet hands, as doing so may cause electric shock.
• 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.
• 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.
• 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.
1. 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.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
WARNING
CAUTION
CAUTION
4
2. 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. Besides, its channels 1 and 2, and 3 and 4 are
made available for bridge connection individually, allowing it to be used as a 1,100 W (8 Ω) x 2 channels
stereo amplifier or as a 3-channel amplifier comprised of 1,100 W (8 Ω) + 550 W (4 Ω) x 2 channels.
The DA-500FH Multichannel Power Amplifier features high power handling of 500 W (100 V line) x 4 channels
(20 Ω output) and durability.
Their wide range of applications include stores and permanent sound systems.
3. 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 (reference size)
An all-pole mains switch with a contact
separation of at least 3 mm in each pole shall
be incorporated in the electrical installation of
the building.
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.
• 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.
· The supplied rack-mounting screws can be used
for the TOA equipment rack only. Do not use
them for other racks.
· When installing the unit in a rack other than that
of TOA, be sure to use the screws with a
diameter of over 5 mm and length of over 12 mm
to mount the unit.
· When connecting the unit's power cord to an AC
outlet, use the AC outlet with current capacity
allowable to the unit.
When the Unit is in Use
• 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.
• 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.
• 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.
5
4. 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 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.
5. INSTALLATION PRECAUTIONS
• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other
equipment.
• 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.
* 1U size = 44.5 mm (reference size)
The supplied rack-mounting screws can be used for the TOA equipment
rack only. Do not use them for other racks.
When installing the unit in a rack other than that of TOA, be sure to use
the screws with a diameter of over 5 mm and length of over 12 mm to
mount the unit.
Failure to do so may cause personal injury.
CAUTION
Power amplifiers
DA-550F/500FH
Perforated panel
Power amplifiers
DA-550F/500FH
6
6. NOMENCLATURE AND FUNCTIONS
[Front]
1. Power switch [ON/OFF]
Power is switched on and off with each depression
of this switch.
2. Power indicator [POWER]
Lights blue when the power is switched on.
3. Input level controls
[CH 1 (BRIDGE 1), CH 2, CH 3 (BRIDGE 2), CH 4]
Adjust the input level of each channel.
4. Ventilation panel (Air Vent)
A filter is located inside the ventilation panel.
To clean the filter, remove the ventilation panel.
(See p. 13; Cleaning the Filter.)
5. Indicators [INPUT, OUTPUT, PEAK, PROTECT]
The indicators are as follows from left to right:
• Input indicator [INPUT]
Lights green regardless of the input level control
setting when an input signal level exceeds about
–20 dB.
• Output indicator [OUTPUT]
Lights yellow when an output level exceeds
about 1 W at an 8 Ω load (DA-550F) or 20 Ω
load (DA-500FH).
• Peak indicator [PEAK]
Lights red when an output signal clips (distortion
occurs).
• Protection indicator [PROTECT]
Lights red when the protection circuitry is
activated. (See p. 12; Protection Operation List.)
When the power is switched on, this indicator
lights for about 2 seconds and then extinguishes.
When a bridge connection is made
(DA-550F only)
• When Channels 1 and 2 are bridgeconnected (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.
• When Channels 3 and 4 are bridgeconnected (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.
DA-550F
DA-500FH
123 4 5
123 4 5
7
[Rear]
6. AC inlet
Connect the supplied power cord to this inlet.
The socket-outlet shall be installed near the
equipment and the plug (disconnecting device)
shall be easily accessible.
7. Control/Monitor terminals
[CONTROL/MONITOR]
Connecting external equipment to these terminals
makes the control and monitor functions available
for channels 1 – 4 individually.
(See p.15; How to Use the Control/Monitor
Terminals.)
8.
Speaker output terminals (with a terminal cover)
[OUTPUTS (DA-550F), OUTPUTS 100 V (DA-500FH)]
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.
• Removable terminal block (3 pins)
H: Hot, C: Cold, E: Earth
•
XLR type male connector (XLR-3-31 equivalent)
Pin 1: Earth, Pin 2: Hot, Pin 3: Cold
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.
10. BRIDGE ON/OFF switches (DA-550F only)
[BRIDGE 1, BRIDGE 2, ON / OFF]
Used when bridge-connecting the unit's
Channels 1 and 2, and Channels 3 and 4.
(See p. 8; Settings and Connections.)
• 4-channel input mode
Set both BRIDGE 1 and 2 switches to OFF.
(factory-preset)
• 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.
• 2-channel input mode
Set both BRIDGE 1 and 2 switches to ON.
Note: Be sure to first turn off the power switch
when changing the BRIDGE switch settings.
11. CH 1 mode ON/OFF switch
[CH 1 TO ALL, ON / OFF]
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: 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.
Note: This terminal is not for protective earth.
Caution when using an XLR type plug
DA-550F
12
6
7
98
9
1110 10
6
DA-500FH
7
12
98
9
11
8
Step 1. Switch off the unit's power.
Step 2. Set the BRIDGE ON/OFF switches (DA-550F only) and CH 1 mode ON/OFF switch.
Step 3. Connect the sound source equipment to the Input terminals.
Note: Refer to p. 11 for the removable terminal plug connection.
Step 4. Connect speakers to the Speaker output terminals.
4-1. Unscrew the output terminal cover.
4-2. Strip 10 mm of insulative jacket from the end of the speaker cable,
as shown in the figure at right.
4-3. Connect speaker cables to the output terminals.
4-4. 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-500FH only)
WARNING
7.1.1. When using the DA-550F
7. SETTINGS AND CONNECTIONS
7.1. Switch Settings and Speaker Connections
CH 1 mode ON/OFF switch
BRIDGE 2 ON/OFF switch
(DA-550F only)
BRIDGE 1 ON/OFF switch
(DA-550F only)
[Rear panel]
Speaker output terminals
Input terminals
Note: The figure shows the DA-550F.
(with a terminal cover)
[4 inputs - 4 outputs] (factory-preset)
CH1
CH1
CH2
CH2
CH3
CH3
CH4
CH4
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Setting
OFF
OFF
OFF
CH4
-
10 mm
CH3
CH2
+
-
+
CH1
-
+
-
+
Speaker output terminals
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
4 – 8 Ω
9
[1 input - 4 outputs]
CH1
CH1
CH3
CH2
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Setting
OFF
OFF
ON
CH4
-
CH3
CH2
+
-
+
CH1
-
+
-
+
Speaker output terminals
4 – 8 Ω
4 – 8 Ω
CH4
[2 inputs - 2 outputs]
CH1
CH1
CH2
CH3
CH3
CH4
[1 input - 2 outputs]
CH1
CH1
CH2
CH3
CH4
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Setting
ON
ON
OFF
Setting
ON
ON
ON
4 – 8 Ω
4 – 8 Ω
Speaker output terminals
-
-
+
+
BRIDGE 1BRIDGE 2
8 Ω
8 Ω
Speaker output terminals
-
-
+
+
BRIDGE 1BRIDGE 2
8 Ω
8 Ω
[3 inputs - 3 outputs (1)]
CH1
CH1
CH2
CH2
CH3
CH3
CH4
[3 inputs - 3 outputs (2)]
CH1
CH1
CH2
CH3
CH3
CH4
CH4
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Setting
OFF
ON
OFF
Setting
ON
OFF
OFF
BRIDGE 2
CH4
-
CH1
CH2
-
-
+
+
Speaker output terminals
-
+
4 – 8 Ω
4 – 8 Ω
8 Ω
CH3
-
+
+
Speaker output terminals
-
+
BRIDGE 1
8 Ω
4 – 8 Ω
4 – 8 Ω
10
[1 input - 3 outputs (1)]
7.1.2. When using the DA-500FH
CH1
CH1
CH2
CH3
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Setting
OFF
ON
ON
BRIDGE 2
CH1
CH2
-
-
+
+
Speaker output terminals
-
+
4 – 8 Ω
4 – 8 Ω
CH4
[1 input - 3 outputs (2)]
CH1
CH1
CH2
CH3
CH4
[4 inputs - 4 outputs] (factory-preset)
CH1
CH1
CH2
CH2
CH3
CH3
CH4
CH4
Switch
BRIDGE 1
BRIDGE 2
CH 1 mode
Switch
Setting
ON
OFF
ON
Setting
CH 1 mode OFF
CH4
-
CH4
-
8 Ω
CH3
-
+
+
Speaker output terminals
-
+
BRIDGE 1
8 Ω
4 – 8 Ω
4 – 8 Ω
CH3
CH2
+
-
+
CH1
-
+
-
+
Speaker output terminals
20 Ω
20 Ω
20 Ω
20 Ω
[1 input - 4 outputs]
CH1
CH1
CH2
CH3
CH4
Switch
Setting
CH 1 mode ON
CH4
-
CH3
CH2
+
-
+
CH1
-
+
-
+
Speaker output terminals
20 Ω
20 Ω
20 Ω
20 Ω
11
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.)
Tip
Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm in width
8. 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
Shielded cable
2
7 mm
20 mm
Tightens
Slotted screwdriver
Loosens
1
Terminal screw
1
Hot
Earth
Cold
Shielded cable
Bit shape 3 mm
Removable terminal plug
12
10. PROTECTION OPERATION LIST
9. INPUT SENSITIVITY SETTING
The input sensitivity for each channel can be set to either +4 dB (factory preset) or –10 dB.
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.
CAUTION
Step 1. Unscrew 9 screws securing the top cover
of the unit, then detach it.
Step 2. Insert the jumper socket into either "+4 dB"
or "–10 dB" position as shown at right.
When a bridge connection is made
(DA-550F only);
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 bridgeconnected. (Input sensitivity settings for
the CH2 and CH4 are disabled.)
Step 3. Replace the detached top cover.
[When set to +4 dB] [When set to –10 dB]
Jumper
socket
(Factory-preset)
Input
Sensitivity
–10 dB/+4 dB
Front panel
CH 1 CH 2 CH 3 CH 4
Viewed from top with the top cover detached.
Failure Protection Operation Indicator Remedy Recovery
Input
Sensitivity
–10 dB/+4 dB
Jumper
socket
Overcurrent due
to overload
Short circuit Current limiter activated.
Temperature rise
at power amp.
heat sink
(over 100°C)
Temperature rise
at power supply
heat sink
(over 80°C)
Abnormal DC
voltage output
Current limiter activated
when impedance drops
below the specified
value.
Load is disconnected.
Load disconnected. Protection indicator
Built-in amplifier unit
that caused the failure
halted.
Load disconnected. Protection indicator
Peak indicator lights. Remove overload. Connecting a correct load
automatically restores
normal operation.
Protection indicator
lights.
lights.
Four indicators of
the corresponding
channel extinguish.
lights.
Check speakers and
lines for short circuit.
Check the unit for
correct ventilation and
overload.
Contact the TOA dealer where the unit was
purchased.
Turn off the power switch.
Correct the load, then
switch on the power.
Operation automatically
returns to normal when
the temperature decreases.
13
12. 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.
13. DIMENSIONAL DIAGRAM
11. 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)
Ventilation Panel
442
Ventilation Panel
3
Filter
2
Detach the panel by pressing
on the right side.
22.5
371
404.2
465
482
76.2
88.4
Unit: mm
14
14. BLOCK DIAGRAMS
14.1. DA-550F
14.2. DA-500FH
CH 1 INPUT
H
C
E
CH 2 INPUT
H
C
E
CH 3 INPUT
H
C
E
CH 4 INPUT
H
C
E
CH 1 TO ALL
switch
CH 1
input level
control
CH 2
input level
control
CH 3
input level
control
CH 4
input level
control
+4 dB
-
CH 1 sensitivity
selection jumper
(+4 dB/
-
10 dB)
+4 dB
-
CH 2 sensitivity
selection jumper
(+4 dB/
-
10 dB)
+4 dB
-
CH 3 sensitivity
selection jumper
-
10 dB)
(+4 dB/
+4 dB
-
CH 4 sensitivity
selection jumper
-
10 dB)
(+4 dB/
10 dB
10 dB
10 dB
10 dB
ON
OFF
BRIDGE 1
ON/OFF switch
ON
OFF
BRIDGE 2
ON/OFF switch
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
OUTPUT 1
relay
OUTPUT 2
relay
OUTPUT 3
relay
OUTPUT 4
relay
CH 1
OUTPUT
+
-
+
-
CH 2
OUTPUT
CH 3
OUTPUT
+
-
+
-
CH 4
OUTPUT
BRIDGE 1
OUTPUT
BRIDGE 2
OUTPUT
CH 1 INPUT
H
C
E
CH 2 INPUT
H
C
E
CH 3 INPUT
H
C
E
CH 4 INPUT
H
C
E
CH 1 TO ALL
switch
CH 1
input level
control
CH 2
input level
control
CH 3
input level
control
CH 4
input level
control
+4 dB
-
CH 1 sensitivity
selection jumper
-
10 dB)
(+4 dB/
+4 dB
-
CH 2 sensitivity
selection jumper
-
10 dB)
(+4 dB/
+4 dB
-
CH 3 sensitivity
selection jumper
(+4 dB/
-
10 dB)
+4 dB
-
CH 4 sensitivity
selection jumper
-
10 dB)
(+4 dB/
10 dB
10 dB
10 dB
10 dB
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
Current Limiter
Short Detector
Protection Circuit
OUTPUT 1
relay
OUTPUT 2
relay
OUTPUT 3
relay
OUTPUT 4
relay
+
-
+
-
+
-
+
-
CH 1
OUTPUT
CH 2
OUTPUT
CH 3
OUTPUT
CH 4
OUTPUT
15
15. 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.
Notes
• All terminals are electrically isolated from the unit body with the photocouplers.
• A shielded wire of the connection cable is grounded to the unit chassis.
15.1. 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.
15.2. 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]
Control voltage (Vin) Power ON/OFF status on each channel
0 – 3 V DC ON
9 – 14 V DC OFF
Control voltage (Vin) R1 resistance value (rated power)
14 V to under 20 V DC 1 kΩ (0.1 W or more)
20 V to under 30 V DC 3.3 kΩ (0.25 W or more)
30 V to under 50 V DC 5.6 kΩ (0.5 W or more)
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.
Note
Be sure to connect a diode across the relay in the direction
as shown above when connecting to the external relay.
Terminal pin No.
Pin 1 or 4
Pin 7
External DC power
Vin
(Max. 14 V DC)
Terminal pin No.
Pin 1 or 4
Pin 7
R1
External DC power
Vin
(Max. 50 V DC)
When an LED is used
When a relay is used
Control current:
12 mA or less
Terminal pin No.
Pin 2, 3, 5, 6, or 8
Pin 7
External DC power
(Max. 30 V DC)
Control current:
12 mA or less
Terminal pin No.
Pin 2, 3, 5, 6, or 8
Pin 7
External DC power
(Max. 30 V DC)
15.3. 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.
15.5. Connection Cable and Maximum Cable Length
For the connection cable, use a Shielded Category 5 twisted pair cable for LAN (CAT5-STP).
The maximum cable length is 600 m.
15.4. Terminal Pin Arrangement
• About operation and terminal status
• 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.
HI-LEVEL LO-LEVEL
Control terminal (input) 9 – 14 V DC 0 – 3 V DC
Monitor terminal (output) OFF ON
Protection indicator (front panel) Light off Light on
Protection status (output) OFF ON
16
Terminal Pin No. Pin name
Unit operation status
HI-LEVEL LO-LEVEL
CH1, 2 CH1 power ON/OFF control (input) CH1 power OFF CH1 power ON
CH1 protection status (output) CH1 normal CH1 protection activated (irregular)
CH1 power ON/OFF status (output) CH1 power OFF CH1 power ON
CH2 power ON/OFF control (input) CH2 power OFF CH2 power ON
CH2 protection status (output) CH2 normal CH2 protection activated (irregular)
CH2 power ON/OFF status (output) CH2 power OFF CH2 power ON
GND (input/output)
––
Fan operation status (output) Fan stop (irregular) Normal
CH3, 4 CH3 power ON/OFF control (input) CH3 power OFF CH3 power ON
CH3 protection status (output) CH3 normal CH3 protection activated (irregular)
CH3 power ON/OFF status (output) CH3 power OFF CH3 power ON
CH4 power ON/OFF control (input) CH4 power OFF CH4 power ON
CH4 protection status (output) CH4 normal CH4 protection activated (irregular)
CH4 power ON/OFF status (output) CH4 power OFF CH4 power ON
GND (input/output)
––
Fan operation status (output) Fan stop (irregular) Normal
8
7
654
3
2
1
8
7
654
3
2
1
17
15.6. RJ45 Connector's Pin Arrangement and Cable Color Codes
RJ45 pin No.
Cable color Cable color
(for T568B) (for T568A)
Orange/white Green/white
Orange Green
Green/white Orange/white
Blue Blue
Blue/white Blue/white
Green Orange
Brown/white Brown/white
Brown Brown
Shield
––
8
7
6
5
4
3
2
1
To Control/Monitor terminal
RJ45 pin No.
1
2
3
4
5
6
7
8
Shield
Shielded Category 5 twisted pair cable for LAN
(CAT5-STP)
18
* 0 dB = 0.775 V
Note: The design and specifications are subject to change without notice for improvement.
Power cord (2 m) ................................................................. 1
Removable terminal plug (3 pins) ........................................ 4
Rack mounting screw (with plain washer) 5 x 12 ................ 4
Tamper-proof cap ................................................................ 4
• Accessories
220 – 240 V AC, 50/60 Hz
Digital class D
480 W (based on EN standards), 2750 W (rated output 4 Ω x 4),
1550 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)
4 channels: 550 W x 4 (4 Ω), 350 W x 4 (8 Ω)
2 channels (BRIDGE): 1,100 W x 2 (8 Ω)
M4 screw terminal, distance between barriers: 8.8 mm
20 – 20,000 Hz (–2 dB, +1 dB)
0.1% (1 kHz), 0.15% (20 – 20,000 Hz)
Protection against excessive current flow due to overload, short circuit,
unusual DC voltage output, and heat sink temperature rise (over 100°C)
100 dB (A-weighted)
70 dB (A-weighted)
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: Shielded Category 5 twisted pair cable for LAN (CAT5-STP)
Maximum cable distance: 600 m
Power (blue) x 1, Input (green) x 4, Output (yellow) x 4, Peak (red) x 4,
Protect (red) x 4
Forced air cooling
–10°C to +40°C
Under 90% RH (no condensation)
Panel: Aluminum, black, alumite
Case: Plated steel sheet
482. (w) x 88.4 (h) x 404.2 (d) mm
9 kg
Power Source
Amplification system
Power Consumption
Input
Rated Output
Frequency Response
Total Harmonic Distortion
Protection circuit
S/N Ratio
Crosstalk
Control/Monitor
LED Indicator
Cooling
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
16. SPECIFICATIONS
16.1. DA-550F CE
Power cord (2 m) ................................................................. 1
Removable terminal plug (3 pins) ........................................ 4
Rack mounting screw (with plain washer) 5 x 12 ................ 4
Tamper-proof cap ................................................................ 4
19
* 0 dB = 0.775 V
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
220 – 240 V AC, 50/60 Hz
Digital class D
460 W (based on EN standards), 2350 W (rated output 20 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)
4 channels: 500 W x 4 (20 Ω)
M4 screw terminal, distance between barriers: 8.8 mm
50 – 20,000 Hz (–3 dB, +1 dB)
0.1% (1 kHz), 0.3% (100 – 20,000 Hz)
Protection against excessive current flow due to overload, short circuit,
unusual DC voltage output, and heat sink temperature rise (over 100°C)
100 dB (A-weighted)
70 dB (A-weighted)
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: Shielded Category 5 twisted pair cable for LAN (CAT5-STP)
Maximum cable distance: 600 m
Power (blue) x 1, Input (green) x 4, Output (yellow) x 4, Peak (red) x 4,
Protect (red) x 4
Forced air cooling
–10°C to +40°C
Under 90% RH (no condensation)
Panel: Aluminum, black, alumite
Case: Plated steel sheet
482. (w) x 88.4 (h) x 404.2 (d) mm
9 kg
Power Source
Amplification system
Power Consumption
Input
Rated Output
Frequency Response
Total Harmonic Distortion
Protection circuit
S/N Ratio
Crosstalk
Control/Monitor
LED Indicator
Cooling
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
16.2. DA-500FH CE
133-22-103-10
URL: http://www.toa.jp/
Traceability Information for Europe (EMC directive 2004/108/EC)
Manufacturer:
TOA Corporation
7-2-1, Minatojima Nakamachi, Chuo-ku, Kobe, Hyogo,
Japan
Authorized representative:
TOA Electronics Europe GmbH
Suederstrasse 282, 20537 Hamburg,
Germany
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