Kodio AC5418 User manual

INSTRUCTION MANUAL
AC5418
Auto Standby Amplifer Fault Changeover
8 Duty / 1 Standby
Thank you for choosing another product from KODIO
AC5418 provides a better way of a standby amplifier to overtake a failed duty unit automatically in
PA installation. Packed with efficient circuitry with features such as overload protection, interval
Pilot Tone generation and data output for remote monitoring, it shall be the right choice for setups
with lesser human interaction in ensuring uninterrupted operation of PAsystem.
Though it is rather simple in the installation works, a brief read through the manual is recommended
and we are confident that you are getting a product of excellence.
VER 3 / 2015
4
AMP. FAULT
AMP. CHANGEOVER
AMP. NORMAL
5 64321 6AMP. NUMBER 7 8

Parts Identification
Rear View
PAGE 2 AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
1
2
3
5
4
6
910
8
7
11 12 13 14 15 16 17
1. NORMAL LEDs
2. FAULT LEDs
3. CHANGEOVER LEDs
4. STANDBY AMP FAULT LED
5. PILOT TONE ACTIVE
6. FAULT BUZZER
Amplifiers connected to the unit which is operating in good condition shall be represented by the green LEDs.
Amplifiers not connected should be switched to disconnect at the rear of the panel to avoid false identification.
Amplifiers detected as faulty would be represented by the red LEDs. Fault condition is detected when the Pilot Tone
is not detected at the amplifier's 100V line output.
In the event of standby takeover of the faulty duty amplifier , the LED shall lit at the faulty channel. At any one time,
only one take over shall take place to prevent overloading.
This LED shall lit when the standby amplifier is detected as faulty. When this occurs, a changeover shall not take
place whenever any duty unit is found faulty.
Pilot tone shall be sent at intervals to every channel of amplifier inputs. Whenever this is sent, the LED shall lit.
Whenever a faulty channel is detected, a buzzer shall be activated and the alarm can be switched off while the red
LED shall remain on.
Front View
A C 5418
AMP. FAULT
AMP. CHANGEOVER
AMP. NORMAL
5 64321 6AMP. NUMBER 7 8
PILOT TONE
STANDBY AMP. FAULT
DC 24V
0.5 A
+-
IN- IN+
OUT+
IN-
IN+
OUT+
OUT- OUT-
IN-
IN+
OUT+
IN-
IN +
OUT + OUT -
OUT-
IN- IN+
OUT+
IN-
IN+
OUT+
OUT-
OUT-
IN+
IN-
CHANNEL 3CHANNEL 4
CHANNEL 5CHANNEL 6
CHANNEL 7CHANNEL 8 STANDBY
AMP
CHAN. 1
ON CHAN. 2 ON CHAN. 3 ON CHAN. 4 ON CHAN. 5 ON CHAN. 6 ON
HIGH
CASCADE
LOW
CHANNEL / AMP. DETECTION SWITCHES
SWITCH TO OFF FOR UNUSED CHANNEL
AUDIO SIGNAL INPUTS / OUTPUTS
RS 485
AB
IN- IN+
OUT+
IN-
IN+
OUT+
OUT-
OUT-
CHANNEL 1CHANNEL 2
CHAN. 7
ON CHAN. 8 ON
ON
CHANNEL 8
SIGNAL
CHANNEL 7
SIGNAL
CHANNEL 6
SIGNAL
CHANNEL 5
SIGNAL
CHANNEL 4
SIGNAL
CHANNEL 3
SIGNAL
CHANNEL 2
SIGNAL
CHANNEL 1 STANDBY
F
CA O
U
N
L
T
T
.
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
LINK
OUTPUT
INPUT
OUTPUT
3A NO
MAX
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
LINK OPEN
+ - G + -
+
- G
AC5418
AMP. AUTO FAULT
CHANGEOVER

Parts Identification
PAGE 3
AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
7. AUDIO IN / OUTPUT PORTS
8. SIGNAL LINK SWITCH
9. STANDBY AMPLIFIER INPUT SOURCE
Audio output from pre-amplifier mixer is connected to this port at "Input" terminals before link it to the amplifier audio
input via "Output" terminals. Signal ground shall be joint together as they are common. If all amplifiers share
a common source, terminate only at channel 1 and utilise the signallink switch to join allthe inputterminals. Please
refer to the chapter " Connecting Input Source ".
Switching the switch on shall link the input source from one channel to the other. Use this only when two or more
amplifiers share common input source. For matrix system, some zones may have different sources, thereby
please disable the switch to break the joint to the adjacent channel.
Connect the input source of standby amplifier to this port. Whenever a faulty channel is detected and a changeover
takes place, the input source of the standby unit shall be directed to the source of the affected channel.
10. FAULT CONTACT PORT
Ifachangeover takesplace orafaultisdetected,this shallprovide adrycontactandbe connectedto externaldevices
for monitoring purpose.
11. POWER INPUT SOURCE
This equipment operates under 24V DC. Please use recommended power supply - Amperes PS9400 or regulated
power adaptor. Please observe polarity when connecting.
12. AMPLIFIER OUTPUT TERMINALS
Connect 1 0 0 V outputs from amplifiers to the "Input" and the "Output" terminal shall then be connected to speaker
zone selectors.
13. STANDBY AMPLIFIER OUTPUT TERMINALS
This port is connected to the 100V output from standby amplifier.
14. CHANNEL AMPLIFIER DETECTION SWITCH
If any of the channel is not used the corresponding channel switch should be turned off to avoid false detection.
15. CASCADE LINK
Two or more of AC54818 can be used when only a standby amplifier is available to serve more than 8duty units.
Use this link in whenmore then one AC5818 isusedinthesystem.Please refer to thesection" Cascading more than
one unit ".
16. RS485 PORT *
This is for external monitoring purpose via RS485 protocol.
Note :
The AC518 monitoring interface is a part of PMX II LAN software.
17. UNIT ADDRESS DIP SWITCH
When it is required to be linked to Amperes PMX II software for monitoring purpose, the unit / units are required to be
addressed. Binary code addressing is used in setting the unit’s ID.

General Schematic 1 : Single Source Setup
INPUT SOURCES
DUTY AMP 1
DUTY AMP 8
STANDBY AMP
AX3800
E/M PANEL
PRE-AMP MIXER
ZONE SELECTOR VOLUME CONTROL
SPEAKERS
O/RIDE VOLTAGE AUDIO SIGNAL
100V LINE OUTPUT
AUDIO +
PILOT TONE
100V OUTPUT
The above schematic is typical for single audio source application. For uninterrupted paging setup, (2 audio source with separate amplifiers for paging and BGM, connections shall be typical to Matrix paging installations. Please cascade more than one AX3800 when only a single standby power amplifiers is available to serve more than 8 duty power packs.
FIRE
O
I
MX2222
POWER
OFF SELECT
TUNER CD CASS
OFF
MASTER
MUSIC SOURCE
SIG IN
BASS
MAXMIN
EXT INPUT
MAX MAXMIN
SOURCE
MIN
SIG IN
CHIME MIXER TREBLE
MAXMIN
TONE CTRL
CH5 CH6CH4
SIG INSIGIN SIGIN
MAXMIN MAXMIN MIN
CH3CH1 CH2
SIG INSIG IN
MAXMIN MAXMIN MAXMIN MAX
AUX
SIG IN
ZS 5121
PUBLIC ADDRESS POWER AMPLIFIER
SIGNAL-40 dB SIGNAL-10 dB
POWER PROTECT
CLIP
PA 2480
PUBLIC ADDRESS POWER AMPLIFIER
SIGNAL-40 dB SIGNAL-10 dB
POWER PROTECT
CLIP
PA 2480
PUBLIC ADDRESS POWER AMPLIFIER
SIGNAL-40 dB SIGNAL-10 dB
POWER PROTECT
CLIP
PA 2480
PAGE 4 AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
AX 3800
AMP.FAULT
AMP. CHANGEOVER
AMP. NORMAL
5 64321 6AMP. NUMBER 7 8
PILOT TONE
STANDBYAMP. FAULT

General Schematic 2: Multiple Source Setup / Matrix
INPUT SOURCES
DUTY
AMP 1
DUTY AMP 8
STANDBY AMP
AX3800
MATRIX MIXER
ZONE SELECTOR VOLUME CONTROL
SPEAKERS
O/RIDE VOLTAGE
AUDIO SIGNAL
100V LINE OUTPUT
AUDIO +
PILOT TONE
100V OUTPUT
The above illustrates a typical schematic for multiple input sources to
amplifiers setup such as matrix system and uninterrupted paging
installations. In a matrix system, speaker zone selector may not be required as
normally each output of amplifier shall represent a specific zone.
Please cascade more than one AX3800 when only a single standby
power amplifiers is available to serve more than 8 duty power packs.
DUTY AMP 2
AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER PAGE 5
ZS 5121
AX 3800
AMP.FAULT
AMP. CHANGEOVER
AMP. NORMAL
56
43
2
16AMP. NUMBER 7 8
PILOT TONE
STANDBYAMP. FAULT

Connecting The Unit - Audio Inputs / Outputs
IN- IN+
OUT+
IN- IN+
OUT-
OUT-
IN+ IN-
CHANNEL 1CHAN 2 STANDBY
AMP
AN. 1
ON CHAN. 2 ON CHAN OCHAN. 4 ON CHAN. 5 ON HAN. 6 ON
HIGH
CASC E
CHANNEL 4
+ - G + -
OUTPUT INPUT
CHANNEL 3
+ - G + -
OUTPUT INPUT
CHANNEL 2
+ - G + -
OUTPUT INPUT
CHANNEL 1 STANDBY
+ - G + - + - G
OUTPUT
INPUT
OUTPUT
OPEN OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
NPUTS/OUTPU CHANNEL / AM ETECTION SWITCHES
SWITCH TO O OR UNUSED CHANNEL
FAULT
CONT.
3A NO
MAX
UDIO SIGNAL INPUTS / OUTP
RS 485
AB
FROM MIXER
BGM SOURCE
3
FROM MIXER
BGM SOURCE
2
FROM MIXER
BGM SOURCE
1
LINK
SWITCH 1
LINK
SWITCH 2
LINK
SWITCH 3
TO
AMPLIFIER
INPUT 4
TO
AMPLIFIER
INPUT 3
TO
AMPLIFIER
INPUT 2
TO
AMPLIFIER
INPUT 1
TO
STANDBY
AMPLIFIER
INPUT
IF ONLY A SOURCE IS TO BE CONNECTED TO ALL AMPLIFIERS:
NOTE :
PAGE 6 AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
The above shall be for a setup of :
Amplifier 1 and 2 with same input source ; thus only input port of channel 1 is connected.
The Link Switch 1 is switched to link position.
Amplifier 3 and 4 shall have separate BGM source and their outputs shall be connected to therespectiveampli-
fier inputs.
Link Switches 2 and 3 shall be at OPEN position.
In the case that a single source is used for the whole installation, connect only to channel 1 and set allthe link switches
to LINK position.
Input and Output signal from AC5418 shall have unity gain. Therefore a single source shall be limited to max 6 output
channels. If a source were to be connected to more than 6 amplifiers, it is recommended that a distribution amplifier is
used before connecting it to the AC5418 input port.
Having a source connected directly to more than 6 amplifiers may cause impedancedrop, probablycausingdistorted
sound quality as well as signal drop.

Connecting The Unit - Amplifier Inputs - Outputs
IN-
IN+
OUT+
IN-
IN+
OUT+
OUT-
OUT-
IN-
IN+
OUT+
IN - IN +
OUT + OUT -
OUT-
IN-
IN+
OUT+
IN-
IN+
OUT+
OUT-
OUT-
IN+
IN-
CHANNEL 1CHANNEL 2CHANNEL 3CHANNEL 4
CHANNEL 5CHANNEL 6 STANDBY
AMP
CHAN. 1
ON CHAN. 2 ON CHAN. 3 ON CHAN. 4 ON CHAN. 5 ON CHAN. 6 ON
CHANNEL 6
+ - G + -
INPUT
OUTPUT
CHANNEL 5
+ - G + -
OUTPUT INPUT
CHANNEL 4
+ - G + -
OUTPUT INPUT
CHANNEL 3
+ - G + -
OUTPUT INPUT
CHANNEL 2
+ - G + -
OUTPUT INPUT
CHANNEL 1
+ - G +
INPU
OUTPUT
OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
OPENLINK
LINK
SIGNAL
AMPLIFIER 70/100V LINE INPUTS/OUTPUTS CHANNEL / AMP. DETECTION SWITCHES
SWITCH TO OFF FOR UNUSED CHANNEL
AUDIO SIGNAL INPUTS / OUTPUTS
CH / AMP
DETECTION
SWITCHES
TO
SPEAKER
ZONE
SELECTOR
TO
SPEAKER
ZONE
SELECTOR
FROM STANDBY
AMPLIFIER
OUTPUT
FROM
AMP. 1
OUTPUT
FROM
AMP. 2
OUTPUT
repeat
FOR UNUSED CHANNELS
AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER PAGE 7
When connecting output of amplifiers to the A C541 8, polarity must be observed.
Each output of the amplifier must be connected to the unit. A disconnected amplifier channel shall be regarded as
a faulty channel and a changeover shall take place.
Unused channel should be switched to OFF position at the CH/AMPDETECTION SWITCH.As for theaboveexam-
ple, switch 6 for unused Amp input / output channel has been turned to OFF position.
Remote Monitoring via PMX II LAN
C 541 8
AMP. FAULT
PILOT TONE
amperes
A
AMP. CHANGEOVER
AMP. NORMAL
5 64321 6AMP. NUMBER 7 8
STANDBY AMP. FAULT
LAN
AC5418 can be remotely monitored by PMX II LAN software RS485 output from AC5418 shall be connected to iPX5500
comm box, which is a UART- Ethernet convertor.
RS485
AC5418
iPX5500 PC with PMX II
software
iPX5500iPX5500iPX5500

Cascading AC5418
UNIT 1
UNIT 3
STANDBY AMPLIFIER INPUT
TERMINALS
LINK CABLE : UNIT 2 LOW
UNIT 3 HIGH
PARALLEL ALL
AUDIO SIGNAL
TERMINALS
IN-
OUT+ OUT-
IN+ IN-
NEL 1 STANDBY
AMP
CHAN. 1
ON
TO STANDBY
AMP AUDIO
INPUT
PARALLEL
OUTPUT
FROM
STANDBY
AMP
HIGHEST PRIORITY
LOWEST
PRIORITY
PAGE 8 AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
Use only one link from top to bottom as shown above.
Unit 3 shall has highest priority than 2, so as 2 than 1. Example. When there are two failures detected at unit 2 and 3, the
channel at unit 3 shall be given preference than others. Thereby, arrange amplifiers that are critical in operation
at higher number.
If it is required to force the lower priority unit into takeover mode, please switch the CH/AMP DETECTION SWITCHatthe
related higher unit to OFF position.
When there is only one standby amplifier to serve more than 8 duty units, more than one AC5418 shall be used to serve
the purpose.
All other settings as shown earlier shall apply
HIGH
CASCADE
LOW
STANDBY
-+- G
OUTPUT
FAULT
CONT.
3A NO
MAX
RS 485
AB
CHAN. 8
ON
AC5418
AMP. AUTO FAULT
CHANGEOVER
ON
HIGH
CASCADE
LOW
STANDBY
-+- G
OUTPUT
FAULT
CONT.
3A NO
MAX
RS 485
AB
CHAN. 8
ON
LINK CABLE : UNIT 1 LOW
UNIT 2 HIGH
AC5418
AMP. AUTO FAULT
CHANGEOVER
UNIT 2
ON
HIGH
CASCADE
LOW
STANDBY
-+- G
OUTPUT
FAULT
CONT.
3A NO
MAX
RS 485
AB
CHAN. 8
ON
AC5418
AMP. AUTO FAULT
CHANGEOVER
ON

Fault Detections
PTACTIVE
LED
CH.NORMAL
LED
CH.
TAKEOVER
LED CH.FAULT
LED
BUZZER
SWITCH
AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER PAGE 9
AMP. FAULT
AMP. CHANGEOVER
AMP. NORMAL
5 64321 6AMP. NUMBER 7 8
PILOT TONE
STANDBY AMP. FAULT
HOW IT WORKS
Although in principle most auto fault changeover works similarly in detecting faulty amplifiers, you may find some
difference in how AC5418 operates. AC5418 sends out Pilot Tone of 20 KHz at intervals and shift from channel to
channel. This reduces strain at the amplifiers in which continuous loading is avoided. Though some slight delay may
occur during the detection period, this shall be beneficial in the long run. The maximum fault detection window
shall be around 20 seconds, which is acceptable in most cases.
Whenever Pilot Tone is active, PT ACTIVE LED shall lit, indicating that the unit is sending out 20KHz signals to
individual channels.
EFFECTIVE DETECTION LEVEL
AC5418 checks the returning PT signal from the output of amplifiers. A minimum 50V line rms is required for
detection. Failure in detecting the returning signal shall render the channel faulty. Thereby it is recom-
mended that the output of the amplifiers be set to 3/4 turn. A C51 8 works even without the presence of audio
signal.
INDICATIONS
Every faulty channel shall be indicated by CH FAULTLED. Unused channel which is not switched off shall also be
regarded as faulty channel. Thereby when there is any unused channel, switch it to OFF to prevent false alarm.
Only a single takeover is allowed to prevent overloading of standby unit. Preference shall be given to unit with
higher number for takeover . ie. When channel 2 and 6 is faulty , channel 6 shall be allowed for takeover.
For cascading mode, please refer to section " Cascading AC5418 ".
Channel being takeover shall be indicated by CH.TAKEOVER LED. In the same time, buzzer shall be
activated and this can be silenced by the BUZZER SWITCH.
A closed contact shall also be established, with the port provided at the rear of the rear of the panel. This can be
linked to external sounder or mimic panel for indication.

Testing The Installations
POWER UP
Please use regulated 24V DC with min 0.5A rating. Unregulated power supply may cause damage to the unit.
Once the power is on, all channels shall be at faulty position, and PT shall be sent to every individual channel. It
shall take approximately 20 ~ 30 seconds for the system to normalise.
TEST INDIVIDUAL WORKING FUNCTION
Switch off the power of the amplifier at
Channel 1.
Switch on the power of the amplifier 1.
TEST PARAMETER
TEST PRIORITY WORKING FUNCTION
Switch off the power of the amplifier at
Channel 1.
Switch off the power of the amplifier at
Channel 2.
TEST PARAMETER OBSERVATIONS
Repeat the above steps for Channel 2 to 6
With amps at Ch1 and 2 still off, switch off
the amp at Ch3.
PAGE 10 AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER
Normal LEDatch. 1shalloff,Fault LEDshalllit andfollowed
by the takeover LED. Buzzer shall be activated. This action
shall take a maximum time of 7 to 15 seconds.
The channel shall return to normal mode with Normal LED
on, Fault and Takeover LEDs OFF as well as buzzer being
silenced.
OBSERVATIONS
NormalLEDatch.1shalloff,Fault LEDshall litandfollowed
by the takeover LED. Buzzer shall be activated. This action
shall take a maximum time of 7 to 15 seconds.
At Ch.1, Fault LED shall remain lit while Takeover LED shall
be off.
At Ch.2, Normal LED off, Fault LED on and Takeover LED
shall lit.
At Ch.1,2, Fault LED shall remain lit while Takeover LED
shall be off.
At Ch.3, Normal LED off, Fault LED on and Takeover LED
shall lit.
Repeat the above steps with Ch4 switched of while the previous ones still at OFF position. You shall observe the same
pattern at the indicators in sequence.
After channel 6, switch on the power amp in sequence from Ch6 to 1 and the results shall be as opposite to the earlier
procedures.

Technical Specifications
Operating voltage
Power consumption
Input signal
Input impedance
Audio output gain
Pilot tone interval
Pilot tone frequency
Detection line
Detection level
Failure detection time
Failure recovery time
Zone load rating
Status indication LED
Changeover alert
Changeover section
Data Comm.
User Interface
24V DC ; 1A
6.8 W
8 Ch balanced line signal
10 K Ohm
Unity
8 seconds / channel
20 KHz ( +/- 5% )
100 V line
50 V rms min
7 - 15 seconds
20 seconds max
500W / 100V line max
Normal ; Fault ; Changeover
Buzzer with switch
Input and output simultaneously
RS485 19.2 kbps
Amperes PMX II LAN via iPX5500
Summary Of Features
Cater for 8 duty and 1 standby and expandable to allow a standby pack to serve larger quantity of duty
amplifiers
Built in Pilot Tone generator which transmit at interval and senses at sequence to protect the power
amplifiers
Overloading protection by allowing only a single take over
Prioritised changeover which higher numbered amplifier shall be preferred for take over in the event
more than two units are down
Shorter fault detection time from 7 to 15 seconds
Changeover at input and output section simultaneously ; thus suitable for matrix system installations or
uninterrupted paging setup.
Input link switch ; making connection of sources easier than hardwired loopings which would make
interconnections look less messy.
Channel isolation switch for unused or unmonitored channels
Individual channel status indicators ; normal, fault and changeover
Dimensions ( WxHxD )
Weight 482 x 88 x 180 mm 2.85 kg
Note:
The above specifications are correct at time of printing but subjected to changes without prior notice due to product
improvements.
AC5418 | AUTO STANDBY AMPLIFIER FAULT CHANGEOVER PAGE 11