jotron MPA 1600 Operating manual

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USER AND INSTALLATION MANUAL
Compact MPA
Compact MPA
Public address and
general alarm system

3
User and Installaon Manual
Compact MPA
TABLE OF CONTENTS
1 INTRODUCTION 6
SERVICE AND WARRANTY 7
CONDITIONS 7
END OF LIFE DISPOSAL GUIDANCE 7
LIST OF ABBREVIATIONS AND DEFINITIONS 7
DOCUMENT REVISION LOG 8
2 GENERAL DESCRIPTION 9
2.1 MPA 1600 OPERATION UNIT 9
2.2 MPA 1601 PA CONTROL UNIT 10
2.3 MPA 1603 GA ALARM PANEL 10
2.4 MPA 1605 PAGA ACCESS PANEL 10
2.5 MPA 1606 PAGA ACCESS PANEL - 19”/ FLUSH MOUNTING 11
2.6 MPA 1643 PAGA ACCESS PANEL - WALL/DESK MOUNTING IN E.X AREAS. 11
2.7 TERMINAL BOARD 11
2.8 AMPLIFIER 1671 11
2.9 LOUDSPEAKERS 12
3 TECHNICAL DATA 12
3.1 MPA 1600 OPERATION UNIT 12
3.2 MPA 1601 PA CONTRON UNIT 12
3.3 MPA 1603 GA ALARM PANEL 13
3.4 AMPLIFIER 1671 13
3.5 CABINETS 13
4 PERFORMANCE 14
4.1 GENERAL ALARM 14
4.2 FEEDBACK COUNTERMEASURES 14
4.3 REDUNDANCY 14
4.3.1 CENTRAL EQUIPMENT 14
4.3.2 LOUDSPEAKER DISTRBUTION NETWORK 14
4.3.3 ALARM PANEL 14
4.3.4 CONTROL UNIT 14
4.4 EXTERNAL INTERFACES 15
4.5 GENERAL ALARM INTERFACE TO SHIP WHISTLE/SIREN 17
4.6 MUTE OF EXTERNAL GENERAL ALARM DURING EMERGENCY PA 17
4.7 GENERAL ALARM WARNING (FLASHING) LIGHT 17
4.8 VOLUME OVERRIDE 18
4.9 POWER FAILURE 18
4.10 GENERAL WARNING 18
4.11 DIP SWITCH CONFIGURATION 18
4.12 CABINET POWER TERMINAL CONNECTIONS 19
4.12.1 AC + DC VERSION 19
4.12.2 AC + AC VERSION 19
4.13 CABINET POWER FAILURE RELAY CONNECTIONS 19
5 INSTALLATION PROCEDURE 20
5.1 INTRODUCTION 20
5.1.1 PA CONFIGURATION, CARGO VESSELS 20

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User and Installaon Manual
Compact MPA
5.1.2 PA CONFIGURATION, PASSENGER VESSELS 20
5.1.3 PA/GA CONFIGURATION, ALL VESSELS 20
5.2 INSTALLATION GUIDE 20
5.2.1 PLANNING 20
5.2.2 GENERAL 20
5.2.3 LOUDSPEAKER SELECTION AND SOUND PRESSURE LEVEL 23
5.2.4 NUMBER OF LOUDSPEAKERS 23
5.2.5 CABLE ARRANGEMENT 23
5.2.6 ZONES 23
5.2.7 AMPLIFIERS 24
5.2.8 SHORT CIRCUIT PROOF LOUDSPEAKERS 24
5.2.9 COMPASS SAFE DISTANCE: 25
5.3 GENERAL ALARM ADJUSTMENT 25
5.4 FEEDBACK/INTERFERENCE CANCELLATION 25
5.4.1 LOCAL MUTE 25
5.4.2 TEMPORARY RECORDING 25
5.5 POWER 26
5.6 GLANDS 26
5.7 FERRULING 26
5.8 MARKING 26
5.9 FASTENING 27
5.10 PRECAUTIONS 27
5.11 CABLE REQUIREMENTS 27
6 CONFIGURATION 27
6.1 INTRODUCTION 27
6.2 ACCESSING THE CONFIGURATION TOOL 27
6.2.1 CONNECTING TO SERVICE PORT 28
6.2.2 SETTING A STATIC ADDRESS LOCALLY 29
6.2.3 IP ADDRESS AND LOGIN INFORMATION 29
6.3 CONFIGURATION – GENERAL 30
6.4 CONFIGURATION – AUDIO OUTPUT 31
6.5 CONFIGURATION – AUDIO INPUT 32
6.6 CONFIGURATION – CONTROL UNITS 33
6.7 CONFIGURATION – USERS 34
6.8 CONFIGURATION – EXTERNAL ALARM INPUTS 35
6.9 CONFIGURATION – SNMP/NETWORK 37
6.10 CONFIGURATION – ADVANCED 38
6.11 BACKUP AND RESTORE 40
6.12 UPLOAD NEW SOUNDS 41
7 OPERATING PROCEDURE 42
7.1 INTRODUCTION 42
7.2 PREREQUISITES 42
7.3 OPERATING DESCRIPTION 42
7.3.1 EMERGENCY PAGING 42
7.3.1.1 PRIORITY 42
7.3.1.2 DESCRIPTION 43
7.3.2 PAGING 44
7.3.2.1 PRIORITY 44

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7.3.2.2 DESCRIPTION 44
7.3.3 GENERAL ALARM 45
7.3.3.1 PRIORITY 45
7.3.3.2 DESCRIPTION 45
8 COMMISSIONING PROCEDURE - FOR THE GENERAL ALARM/PUBLIC ADDRESS SYSTEM COMPACT MPA 46
8.1 SCOPE 46
8.2 INTRODUCTION 46
8.3 BRIEF SYSTEM DESCRIPTION 46
8.3.1 GENERAL 46
8.3.2 CENTRAL EQUIPMENT 46
8.3.3 ACCESS & CONTROL PANELS 46
8.4 FUNCTIONAL TESTING OF UNITS 46
8.4.1 MPA 1600 OPERATION UNIT 46
8.4.2 MPA 1601/1643 TALK UNITS 47
8.4.2.1 NORMAL PAGING 47
8.4.2.2 EMERGENCY PAGING 47
8.4.2.3 INDICATORS 47
8.4.2.4 PRIORITY BY NORMAL PAGING "PA" 48
8.4.2.5 EXTERNAL CONTROL OUTPUTS 48
8.4.3 ZONES 48
8.4.4 MPA 1603 ALARM PANEL 49
8.4.4.1 ALARM SETTING 49
8.4.4.2 EXTERNAL CONTROL OUTPUTS 49
8.4.4.3 INDICATORS 49
8.4.5 MPA 1605/1606 COMBINATION PANELS 49
8.4.6 PAGING DURING ALARM (GENERAL ALARM) 49
8.4.7 FAILURE / WARNING OUTPUTS 50
8.4.8 REDUNDANCY TEST (DUPLICATED SYSTEM ONLY) 50
8.4.9 SOUND PRESSURE LEVEL 50
9 ANNEX A 51
9.1 COMPACT MPA CABINET – MECHANICAL LAYOUT 51
9.2 WALL BRACKET KIT 52
9.3 COMPACT MPA CABINET – EXTERNAL CONNECTION 54
9.4 MPA 1601 - MECHANICAL LAYOUT 56
9.5 MPA 1601 - EXTERNAL CONNECTION 56
9.6 MPA 1603 - MECHANICAL LAYOUT 57
9.7 MPA 1603 - EXTERNAL CONNECTION 57
9.8 MPA 1605 - MECHANICAL LAYOUT 58
9.9 MPA 1605 - EXTERNAL CONNECTION 58
9.10 MPA 1606 - MECHANICAL LAYOUT 59
9.11 MPA 1606 - EXTERNAL CONNECTION 59
9.12 MPA 1643 - MECHANICAL LAYOUT 60
9.13 MPA 1643 - EXTERNAL CONNECTION 60
9.14 PHONTECH 1671 - MECHANICAL LAYOUT 61
9.15 PHONTECH 1671 - EXTERNAL CONNECTION 61
9.16 PHONTECH 1671 62

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User and Installaon Manual
Compact MPA
The Compact MPA-system is a marine and oshore Public Address system. It meets the requirements for PA/GA, and enter-
tainment, distribuon onboard ships and mobile oshore units. The system conforms to SOLAS, IMO and IEC regulaons.
Based on modular design and exible conguraon, it covers a wide range of installaon complexies. Ranging from, small
single loop systems, to medium duplicated systems.
The gure shows a fully populated and duplicated installaon. The compact MPA-system may also operate in a single
conguraon according to the requirements.
1 INTRODUCTION

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User and Installaon Manual
Compact MPA
SERVICE AND WARRANTY
Warranty me: 2 years from the factory.
All goods sold by Jotron AS are warranted to be free from defect in workmanship and material for the period of twenty-four
(24) months from the date of delivery (unless stated otherwise and conrmed in wring)
CONDITIONS:
Jotron AS is given full parculars in wring of any claim prior to the expiraon of such a period and within fourteen days
of the discovery of the alleged defect.
The product/s have been stored, maintained or used according to manual/s and specicaon/s
Liability shall be limited at Jotron AS’ opons to replacement or repair or to a sum not exceeding the net invoice value of
the defecve goods.
Upon request the alleged faulty goods are returned to Jotron AS at the Buyer’s expense.
Unless expressly spulated in the acceptance of the order Jotron AS gives no warranty or guarantee of the tness or
suitability of the goods for any purpose whether disclosed or otherwise.
All other warranes or condions expressed or implied are hereby excluded and Jotron AS shall in no circumstances be
liable for consequenal damages.
END OF LIFE DISPOSAL GUIDANCE:
This equipment is not to be disposed in normal waste, but be handled in accordance with applicable waste disposal
regulaons in the country where the equipment is used.
AGC Automac Gain Control
EM-PA Emergency-Public Address
GA General Alarm
HPF High Pass Filter
IEC Internaonal Electrotechnical Commission
IMO Intergovernmental Marime Organisaon
IP22, IP44 etc Ingress Protecon marking according to IEC 60529
MPA Marine Public Address
MPAL Sound le format used for alarms
PA Public Address
PABX Private Automac Branch Exchange
SOLAS Internaonal convenon for the safety of life at sea
THD Total Harmonic Distoron
LIST OF ABBREVIATIONS AND DEFINITIONS

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User and Installaon Manual
Compact MPA
A 06.07.17 Inial release SEH ASK
B 16.08.17 New layout SEH ASK
C02.10.17 Uppdated IW-draving SEH ASK
Rev Issue Date Reason for Issue Author Approval
DOCUMENT REVISION LOG

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User and Installaon Manual
Compact MPA
2 GENERAL DESCRIPTION
2.1 MPA 1600 OPERATION UNIT
The MPA 1600 Operaon Unit is the system central logic controller in the Compact MPA-system. It is designed for 19" 1 Unit
rack mounng.
Features:
• Up to 6 zones, selectable in any conguraon.
• Up to 6 MPA 1601 / 1604 Control Units
• Up to 6 MPA 1603 Alarm Panels
• Up to 2 emergency microphones
• External paging facility (from ICS6200/DICS6100/PABX etc.).
• Prepared for duplicaon - A/B dual system, with synchronisaon.
• Interfaces for manual and/or automac alarms.
• One entertainment source, with free zone selecon.
• Signal processing capabilies.
• Congurable priority levels.
• 7 audio outputs, with unlimited amplier expansion.
• Facility for mung of local loudspeaker during paging.
• Override of entertainment volume-controls during paging.
• Output for mute of external GA system.
• Output for acvaon of external GA system.
• Synchronisaon with external GA tones.
• Up to 8 dierent alarms in the system.
• Up to 6 MPA 1603 Alarm Panels, with up to 4 dierent alarms.
• Chime/”ding-dong” generator.
• Alarm light signal acvaon.
• Mute of external alarm facility.
• Built-in loudspeaker, to monitor acvity on zones.
Indicators:
• Power status indicator with a red/green led.
• Warning/Info indicaon with a red/green led.
• Link/Tx indicaon with a green led.
• PA led indicaon with a green led.
• Alarm indicaon with a green led.
• Zone status indicaon with 6 red/green leds.
• MPA 1601 User status indicaon with 6 red/green leds.

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Compact MPA
2.2 MPA 1601 PA CONTROL UNIT
The MPA 1601 is a full facility operator control unit in the
MPA system. It is designed for ush mounng.
Features:
• Microphone opons are Gooseneck, or Handheld.
• RS485 data communicaon with MPA1600 Operaon Unit.
• 6 Zone-selecon keys.
• PA (normal paging) key
• Emergency PA key marked with red colour
• Emergency PA key is protected against unauthorised use by means
of me-trap funconality (the Emergency PA key must be held for
1 sec. before acvaon.
• Dimmer key.
• Status-Led for system A and system B.
• Led-indicators for all keys.
• Dimmable Backlight and indicaon leds
• Local mute relays.
2.3 MPA 1603 GA ALARM PANEL
The MPA 1603 is a manual alarm control unit in the MPA system.
It is designed for ush mounng.
Features:
• RS485 data communicaon with MPA1600 Operaon Unit.
• Alarm keys marked with the text “ALARM” and red colour.
• Cancel key.
• Protecon against unauthorised use by means of me-trap funcon
ality (the alarm keys and the Cancel keys must be held for 1 sec.
before acvaon).
• 6 leds indicang alarm status in each zone. Led indicators for all keys.
• Dimmable backlight and leds, remotely controlled from the adjacent
MPA 1601 Control Unit.
2.4 MPA 1605 PAGA ACCESS PANEL
- TABLE TOP MOUNTING.
The 1605 is an access and control panel prepared for Compact
MPA A and B system.
Features:
• Gooseneck or handheld microphone.
• 6 zone selecon switches.
• Alarm acvaon buons.
• Emergency PA / normal PA acvaon buon.
• Dimmer funcon.
• Audio level meter.
• IP44 rang.




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User and Installaon Manual
Compact MPA
2.5 MPA 1606 PAGA ACCESS PANEL
The 1606 is a rack mounted access and control panel
prepared for Compact MPA A and B system.
Features:
• Gooseneck or handheld microphone.
• 6 zone selecon switches.
• Alarm acvaon buons.
• Emergency PA / normal PA acvaon buon.
• Dimmer funcon.
• Audio level meter.
• IP22 rang.
2.8 AMPLIFIER 1671
The Compact MPA system is designed to be used with the Jotron amplier 1671.
Features:
• Thermal and overload protecon, balanced input.
• Dual power input (AC primary / DC backup or AC primary / AC backup)
• (Gain adjustment 0 – [-12] service mode)
2.6 MPA 1643 PAGA ACCESS PANEL 
The MPA 1643 is a full facility Intrinsically
Safe operator access and control unit,
designed for hazardous areas.
Features:
• Handheld or gooseneck microphone.
• Status LED`s for both A- and B-system.
• LED-indicators for all keys.
• 6 Zone-selecon keys.
• Alarm keys.
• IP44 rang.
• Ex e ib IIB T5
2.7 TERMINAL BOARD
Due to the large number of interfaces in
the MPA system, a terminal board is
necessary to interface the
MPA 1600 with ship-cables.
Refer to chapter 4.4 and 9.3
for all detailed informaon.

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Compact MPA
2.9 LOUDSPEAKERS
A PA/GA system like the Compact MPA will ulize a wide variety of loudspeakers in the distribuon network. Consideraons
such as environment, topology and sound pressure requirement will determine what kind of loudspeaker type and size
should be used in the specic areas.
To comply with the environment requirement all loudspeakers used in a PA/GA system must be approved according to
relevant parts of IEC60945 or similar.
The topology and sound pressure requirement will be decisive for the number of loudspeakers in the dierent areas, the
loudspeaker type, their power rang and tapping.
See secon 5.2.3 for detailed loudspeaker selecon informaon.
3 TECHNICAL DATA
3.1 MPA 1600 OPERATION UNIT
19" 1 Unit rack mounng unit.
Operang voltage: Dual 24VDC – primary (AC through integrated Power supply module) / backup
Current drain maximum: 5A
Microphone input level: 5mV.
External PA input level: 0 dBu typical (congurable)
External entertainment input level: 0 dBu typical (congurable)
Audio outputs to ampliers: 0 dBu typical (congurable)
Size: 44 x 483 x 206 mm (HxWxD)
Weight: 3 kg
Ingress Protecon (stand-alone) (IP): 22
Compass safe distance: Ref Cabinet data
3.2 MPA 1601 PA CONTRON UNIT
Outer dimensions: 144 x 144 mm.
Operang voltage: 24VDC supplied from the MPA1600 Operaon Unit.
Current drain maximum: 300mA. (integrated in the MPA 1600)
Microphone input level: 10mV typical (dynamic mic.)
Ingress Protecon (IP): 44
Compass safe distance (standard) 80 cm
Compass safe distance (steering) 50 cm

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User and Installaon Manual
Compact MPA
3.3 MPA 1603 GA ALARM PANEL
Outer dimensions: 144 x 96 mm.
Operang voltage: 24VDC supplied from the MPA1600 Operaon Unit.
Current drain maximum: 100 mA.
Ingress Protecon (IP): 44
Compass safe distance (standard): 60 cm
Compass safe distance (steering): 40 cm
3.4 AMPLIFIER 1671
Electrical:
Power output (THD 1%) 250W (RMS)
Max load: 40 ohm
Frequency Response (+1/-3.5dB) 300Hz to 7KHz
THD at 1 KHz, Rated Output Less than 1%
HPF -3dB at 150Hz
Signal to Noise Rao Beer than 80dB
Input Sensivity/Impedance 0.775V/47K ohm Balanced
General:
Power source (primary) AC 230V (220/240) or
(primary alternave) AC 115V (110/120) 50Hz/60Hz
(backup) DC 24V
Maximum current drain AC (110V) 5A
Dimensions W:483 x H:44 x D:320 mm
Weight 5.5 Kg.
3.5 CABINETS
Type: Jotron Compact cabinet 19” 5x1U
Dimensions W:585 x H:618 x D:470 mm
Weight 30 kg.
Ingress Protecon (IP) 22

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User and Installaon Manual
Compact MPA
4 PERFORMANCE
4.1 GENERAL ALARM
The General Alarm tone in the Compact MPA system consists of seven short followed by one long tone burst. Each short tone
has approximately 1 sec. duraon, each pause between tones approximately 1 sec. and the long tone has 7 sec. duraon. The
alarm signal sequence is connuously repeated. The standard alarm tone is a 1000 Hz sinusoidal tone.
The General alarm tone can be adjusted by means of loading dierent conguraon data. Frequencies between 200 and
2500 Hz can be selected along with triangular or sinusoidal curve form. The conguraon changes require a special adminis-
trave tool and are unavailable during normal operaon.
4.2 FEEDBACK COUNTERMEASURES
In the Compact MPA system there are three dierent countermeasures available in order to avoid audible feedback and
disturbance during announcements.
The MPA 1601 Control Unit is equipped with either a gooseneck or handheld microphone with close-talk characteriscs with
excellent background noise suppression capability. It is equipped with relays for disconnecng loudspeakers in the close
proximity when acvated.
Each audio interface can be programmed to be of a recording type. The message is temporarily recorded and is automacally
played back when the announcement is terminated.
4.3 REDUNDANCY
In a PA/GA system like the Compact MPA the design and the installaon must be carried out in a way that the damage of one
single failure shall be minimized as far as possible. To achieve full redundancy using the Compact MPA system, follow these
measures:
4.3.1 CENTRAL EQUIPMENT
The Compact MPA cabinet must be duplicated and physically separated in dierent re zones – System A and B. Ref. picture
in chapter 1.
The A and B central equipment are connected together with a synchronisaon link to coordinate alarm tone generaon and
other ming-related funconality. If this synchronisaon link is somehow broken or damaged the systems will work individu-
ally.
The MPA 1601 Control Unit and MPA 1603 Alarm Panel are equipped with a duplicated interface for connecon to both sys-
tems (A and B). The connecon status is displayed in the System A / B led indicator of the MPA 1601.
4.3.2 LOUDSPEAKER DISTRBUTION NETWORK
The loudspeaker distribuon network must be duplicated and routed separately in dierent cable ducts and as physically
separated as possible.
All public areas shall be covered equally from both loudspeaker distribuon network.
All cabins shall be supplied with PA/GA loudspeakers. Minimum requirement is that neighbouring cabins shall be supplied
from dierent loudspeaker distribuon network.
4.3.3 ALARM PANEL
In order to have a required redundancy and availability to the General alarm, the minimum amount of MPA 1603 Alarm Pan-
els is two. One shall always be placed on the Navigaon Bridge. At least one more shall be placed in another strategic place
as an alternave acvaon posion.
4.3.4 CONTROL UNIT
In order to have a required redundancy and availability to the Emergency PA, the minimum amount of MPA 1601 Control
Units is two. One shall always be placed on the Navigaon Bridge. At least one more shall be placed in another strategic place
as an alternave acvaon posion. Addional units should be placed where it is deemed necessary.

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Compact MPA
4.4 EXTERNAL INTERFACES
The Compact MPA PA/GA system is equipped with various control outputs for external equipment. This is intended for
addional warnings and indicators. Ref. drawing in 9.3.
Terminals Name  Input/output Interface  Current /
Impedance
1 – 2 A ~ Loudspeaker loop,
Zone 1
Output
100VAC 2.5A
3 – 4 B ~ 100VAC 2.5A
5 – 6 A ~ 100VAC 2.5A
7 – 8 B ~ 100VAC 2.5A
9-10 A ~ Loudspeaker loop,
Zone 2
Output
100VAC 2.5A
11-12 B ~ 100VAC 2.5A
13-14 A ~ 100VAC 2.5A
15-16 B ~ 100VAC 2.5A
17-18 A ~ Loudspeaker loop,
Zone 3 Output
100VAC 2.5A
19-20 B ~ 100VAC 2.5A
21-22 A ~ 100VAC 2.5A
23-24 B ~ 100VAC 2.5A
25-26 A ~ Loudspeaker loop,
Zone 4 Output
100VAC 2.5A
27-28 B ~ 100VAC 2.5A
29-30 A ~ 100VAC 2.5A
31-32 B ~ 100VAC 2.5A
33-34 A ~ Loudspeaker loop,
Zone 5 Output
100VAC 2.5A
35-36 B ~ 100VAC 2.5A
37-38 A ~ 100VAC 2.5A
39-40 B ~ 100VAC 2.5A
41-42 A ~ Loudspeaker loop,
Zone 6 Output
100VAC 2.5A
43-44 B ~ 100VAC 2.5A
45-46 A ~ 100VAC 2.5A
47-48 B ~ 100VAC 2.5A
49 Z1ref+24V
Volume Override control
outputs Output
Open collector source/
sink 24VDC 40 mA
51 Z1
53 Z3ref+24V Open collector source/
sink 24VDC 40 mA
55 Z3
57 Z5ref+24V Open collector source/
sink 24VDC 40 mA
59 Z5
61 Not in Use
63 Not in Use
50 Z2ref+24V
Volume Override control
outputs
Output
Open collector source/
sink 24VDC 40 mA
52 Z2
54 Z4ref+24V Open collector source/
sink 24VDC 40 mA
56 Z4
58 Z6ref+24V Open collector source/
sink 24VDC 40 mA
60 Z6
62 Not in Use
64 Not in Use
65 Al. 1 ref -
Direct Alarm inputs Input Dry contact input
≈20VDC 2 mA
67 Al. 1
69 Al. 2 ref - ≈20VDC 2 mA
71 Al. 2
73 Al. 3 ref - ≈20VDC 2 mA
75 Al. 3
77 Al. 4 ref - ≈20VDC 2 mA
79 Al. 4
66 Al. 1 ref +
Alarm status outputs Output Open collector source/
sink
24VDC 40 mA
68 Al. 1
70 Al. 2 ref + 24VDC 40 mA
72 Al. 2
74 Al. 3 ref + 24VDC 40 mA
76 Al. 3
78 Al. 4 ref + 24VDC 40 mA
80 Al. 4
81 Alarm Sync IN Alarm sequence input Input Dry contact input ≈20VDC 2 mA
83 Alarm Sync Ref-
85 EMPA_NO Emergency PA acve
output, Normally Open Output Dry contact output -- 0.3 A
87 EMPA_CO

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User and Installaon Manual
Compact MPA
89 EMPA_ACT24V EM PTT is acve Output Open collector source/sink 24VDC 40 mA
91 EMPA_REF
93 Pwr.Fail.no Power monitoring output,
Normally Open Output Dry contact output -- 0.3 A
95 Pwr.Fail.co
82 Alarm Sync Out Alarm sequence monitor
output Output Dry contact output -- 0.3 A
84 Alarm Sync ref-
86 TX A/B Communicaon link
between System A & B for
synchronizaon purposes
Output Data communicaon output RS485 5V 100 Ω
88
90 RX A/B Input Data communicaon output RS485 5V 100 Ω
92
94 GW no GENERAL WARNING Error
monitoring output Output Dry contact output -- 0.3 A
96 GW co
98 Audio +
User Interface 5
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
100 Audio -
102 RS485 - Bidireconal Data communicaon
tranceiver channel RS485 5V 100 Ω
104 RS485 +
106 Power + Output Power supply output 24VDC 140 mA
108 Power -
110 EXT. PA IN 1
(AUDIO)
System Audio for external
Paging Input Galvanically balanced audio input 0dBu 15 kΩ
112
114 PA1 / 0V Direct Paging inputs Input Dry contact input ≈20VDC 2 mA
116
118 EXT. PA
OUT (AUDIO)
System Audio during PTT/
EM PTT Output Galvanically
balanced audio output 0dBu 230 Ω
120
122 TALK USED Any PTT is acve output Output Dry contact output -- 0.3 A
124
126 Not in Use
128 Not in Use
97 Audio +
User Interface 6
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
99 Audio -
101 RS485 - Bidireconal Data communicaon
tranceiver channel RS485 5V 100 Ω
103 RS485 +
105 Power + Output Power supply output 24VDC 140 mA
107 Power -
109 EXT. PA IN 2
(AUDIO)
System Audio for external
Paging Input Galvanically balanced audio input 0dBu 15 kΩ
111
113 PA2 / 0V Direct Paging inputs Input Dry contact input ≈20VDC 2 mA
115
117 Audio + Entertainment audio in Input Electronically balanced audio input 2Vrms 15k Ω
119 Audio -
121 PTT ref - Entertainment PTT
(Zone selecon see
Dipswitch 7)
Input Dry contact input ≈20VDC 2 mA
123 PTT
125 Mute no Entertainment Mute
(Selecon see Dipswitch 8) Output Dry contact output -- 0.3 A
127 Mute co
129 Audio +
User Interface 1
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
131 Audio -
133 RS485 - Bidireconal Data communicaon
tranceiver channel RS485 5V 100 Ω
135 RS485 +
137 Power + Output Power supply output 24VDC 140 mA
139 Power -
141 Audio +
User Interface 2
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
143 Audio -
145 RS485 - Bidireconal Data communicaon
tranceiver channel RS485 5V 100 Ω
147 RS485 +
149 Power + Output Power supply output 24VDC 140 mA
151 Power -
130 Audio +
User Interface 3
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
132 Audio -
134 RS485 - Bidireconal Data communicaon
tranceiver channel RS485 5V 100 Ω
136 RS485 +
138 Power + Output Power supply output 24VDC 140 mA

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User and Installaon Manual
Compact MPA
4.5 GENERAL ALARM INTERFACE TO SHIP WHISTLE/SIREN
In order to use the ship whistle as a part of the General Alarm system the Compact MPA is providing a dry closing contact
(NO) output that generates a control output signal synchronised with the GA tone sequence at terminals 82 and 84. Ref.
drawing in 9.3.
4.6 MUTE OF EXTERNAL GENERAL ALARM DURING EMERGENCY PA
During an acve Emergency PA, the Compact MPA outputs a dry closing contact (NO) output at terminals 85 and 87 as a
mute signal for an alternave external GA system. This signal is acvated together with the internal GA mute funconality.
4.7 GENERAL ALARM 
An acve General Alarm in the Compact MPA system is also indicated with a dry closing contact (NO) output at terminals 66
and 68 for acvaon of external GA warning lights. This is mandatory in high noise environments. Ref. drawing in 9.3.
140 Power -
142 Audio +
User Interface 4
Bidireconal Electronically balanced audio input 2Vrms 15k Ω
144 Audio -
146 RS485 - Bidireconal Data communicaon tranceiver
channel RS485 5V 100 Ω
148 RS485 +
150 Power + Output Power supply output 24VDC 140 mA
152 Power -
153 Audio +
Mic. Staon 1 Input
Electronically balanced audio input 10 mV 5 kΩ
155 Audio -
157 PTT Dry contact input ≈20 VDC 2 mA
159 PTT ref-
154 Audio +
Mic. Staon 2 Input
Electronically balanced audio input 10 mV 5 kΩ
156 Audio -
158 PTT Dry contact input ≈20 VDC 2 mA
160 PTT ref-
161 485 -
RS 485
(To amp 1671) Bidireconal
Data communicaon tranceiver
channel RS485 5V 100 Ω
163 485 +
165 485 - Data communicaon tranceiver
channel RS485 5V 100 Ω
167 485 +
169 485 - Data communicaon tranceiver
channel RS485 5V 100 Ω
171 485 +
162 RX B
RS 422 – RX
(Not used)
164 RX A
166 RX B
168 RX A
170 RX B
172 RX A
173 100V_P 100V line from amplier
(Zone 1 / Relay 1) Input 100VAC 2.5A
174 100V_N 100VAC 2.5A
175 100V_P 100V line from amplier
(Zone 2 / Relay 2) Input 100VAC 2.5A
176 100V_N 100VAC 2.5A
177 100V_P 100V line from amplier
(Zone 3 / Relay 3) Input 100VAC 2.5A
178 100V_N 100VAC 2.5A
179 100V_P 100V line from amplier
(Zone 4 / Relay 4) Input 100VAC 2.5A
180 100V_N 100VAC 2.5A
181 100V_P 100V line from amplier
(Zone 5 / Relay 5) Input 100VAC 2.5A
182 100V_N 100VAC 2.5A
183 100V_P 100V line from amplier
(Zone 6 / Relay 6) Input 100VAC 2.5A
184 100V_N 100VAC 2.5A
All cables used for external interfaces are to be twisted pair, outer screen, 0.75 mm² minimum.

18
User and Installaon Manual
Compact MPA
4.8 VOLUME OVERRIDE
In addion to the entertainment mute funconality, the Compact MPA is equipped with a volume override signal as a relay
driver output (Open Collector source/sink) which is acvated during both GA and Emergency PA. This signal is used for reset-
ng local entertainment (etc.) volume control sengs related to the GA/PA system. Terminals 49 through 60 can be used for
this purpose. Ref. 4.4 and drawing in 9.3.
4.9 POWER FAILURE
The Compact MPA is supplied from two dierent sources: primary and backup. The system is equipped with a dry closing
contact (NO & NC) output at terminals 93 and 95 that is acvated whenever one of these sources fail, either primary or
backup. This signal can either be used as an interface to external surveillance and monitoring systems or for direct signals, as
rotang/ashing lights or light columns. Ref. drawing in 9.3.
4.10 GENERAL WARNING
The Compact MPA system is equipped with a general warning dry closing contact (NO) output at terminals 94 and 96. This
control output can be used as an interface to external surveillance and monitoring systems for indicaon of system internal
module failure indicaons:
The synchronisaon link between system A and B is defect
A control unit is defect or disconnected
4.11 DIP SWITCH CONFIGURATION
There are two sets of dip switches on the terminal board for signal roung conguraon. S7 can be used to enable entertain-
ment to zones Z1 – Z6. This opons routes entertainment audio to the enabled zones when entertainment input is acvated,
as long as no high priority audio (PA, EMPA, alarm) is acvated.
S8 has switches for selecng PA and/or EMPA on the external PA out, wether PA, EMPA and Alarm mute entertainment and
if the system is an A- or B-system.
S7  S8 
1Enable entertainment in zone Z1 1PA routed to External PA Out
2Enable entertainment in zone Z2 2EMPA routed to External PA Out
3Enable entertainment in zone Z3 3PA mute entertainment
4Enable entertainment in zone Z4 4EMPA mute entertainment
5 Enable entertainment in zone Z5 5 Alarm mute entertainment
6Enable entertainment in zone Z6 6System is B-system

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User and Installaon Manual
Compact MPA
4.12 CABINET POWER TERMINAL CONNECTIONS
4.12.1 AC + DC VERSION
The primary power source for the Compact MPA Cabinet is 230VAC with 24VDC as backup.
TB1 TB2
1230VAC
Live
1
24VDC2 2
3 3
4230VAC
Neutral
424VDC (fuse)
5 5
0VDC6 6
7PE
GND
7
8 8 0VDC (fuse)
9 9 PE
GND
TB3 10
1MPA 24VDC backup (supplied from 1671)
2MPA 0VDC backup (supplied from 1671)
4.12.2 AC + AC VERSION
The primary power source for the Compact MPA Cabinet is 230VAC with addional 230VAC as backup.
TB1 TB2
1230VAC
Live
12230VAC
Live
2 2
3 3
4230VAC
Neutral
4230VAC
Neutral
5 5
6 6
7PE
GND
7PE
GND
8 8
9 9
TB3 10
1MPA 24VDC backup (supplied from 1671)
2MPA 0VDC backup (supplied from 1671)
4.13 CABINET POWER FAILURE RELAY CONNECTIONS
The power failure relays K1 and K2 are DPDT relays with one pole on 11, 12 and 14 and the other pole on 21, 22 and 24.
K1 K2
11 Primary power fail – Common contact 21 11 Secondary power fail – Common contact 21
12 Primary power fail – NC contact 22 12 Secondary power fail – NC contact 22
14 Primary power fail – NO contact 24 14 Secondary power fail – NO contact 24

20
User and Installaon Manual
Compact MPA
5 INSTALLATION PROCEDURE
5.1 INTRODUCTION
5.1.1 PA CONFIGURATION, CARGO VESSELS
Compact MPA system installaons onboard cargo vessels, where GA is not integrated into the PA system have no require-
ment for duplicaon.
All loudspeaker loops shall be arranged as closed loops.
5.1.2 PA CONFIGURATION, PASSENGER VESSELS
Compact MPA system installaons onboard passenger vessels are required to be duplicated in order to minimize the eect of
a single failure. The duplicated equipment (Compact MPA) must be separated and located in dierent re zones.
The loudspeaker loops from each system shall be segregated throughout the ship and shall be arranged as closed loops.
5.1.3 PA/GA CONFIGURATION, ALL VESSELS
For cargo vessel installaons where GA is integrated into the PA system as a combined PA/GA system the requirement for
duplicaon is the same as for PA systems onboard passenger vessels as described in secon.
5.2 INSTALLATION GUIDE
5.2.1 PLANNING
The installaon should be planned in detail before commencing. Sound pressure levels and the number of loudspeakers must
be decided upon. The cables should be listed in a cable plan, with the number of pairs etc. The locaon of each unit in the
communicaon system should be planned to obtain maximum performance and user availability.
5.2.2 GENERAL
The main requirement of a GA / PA system is to achieve sucient coverage and sound pressure level (SPL) for alarms and
PA messages to be heard throughout the installaon. The number of loudspeakers, their types (power rang) and tapping
determine the coverage and sound pressure.
The minimum requirement during normal operang condions for GA is 80dBA and at least 10dBA above the ambient noise
level in both interior and exterior spaces. In the cabins sleeping posions and bathroom the minimum requirement is 75dBA
and at least 10dBA above the ambient noise level.
For PA (Emergency PA) the minimum gures are 75dBA and at least 20 dBA above the speech interference level for interior
spaces. For exterior spaces the minimum requirement is 80 dBA and at least 15 dBA above the speech interference level.

21
User and Installaon Manual
Compact MPA
To ensure this, the Compact MPA system makes use of the industrial standardized 100 V line distribuon system. This is a dis-
tribuon system that is based on a xed line level (100V) and where the loudspeaker output power is determined by means
of loudspeaker type and power tapping. Hence, each loudspeaker meeng this line specicaon is equipped with an audio
transformer with several tapping possibilies.
To comply with the environment requirement all loudspeakers used in a PA / GA system must be approved according to
relevant parts of IEC60945 or similar.
Typical loudspeaker data sheets follow:
DNH CAR6T: