Amit RRAM-PWA/B1 User manual

rram-pwab1_g_en_101
RRAM-PWA/B1
IP audio amplifier
for rolling stock
Operation manual
Version 1.01

RRAM-PWA/B1
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AMiT, spol. s r.o. does not provide any warranty concerning the contents of this
publication and reserves the right to change the documentation without any
obligation to inform about it.
This document can be copied and redistributed under following conditions:
1. The whole text (all pages) must be copied without any changes.
2. All redistributed copies must retain the AMiT, spol. s r.o. copyright notice
and any other notices contained in the documentation.
3. This document must not be distributed for purpose making of profit.
The names of products and companies used herein can be trademarks or
registered trademarks of their respective owners.
AMiT is a registered trademark.
Copyright (c) 2013, AMiT, spol. s r. o.
Producer: AMiT, spol. s r. o.
Naskové 3/1100, 150 00 Praha
www.amit.cz
Technical support: [email protected]

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Contents History of revisions.........................................................................................4
Related documentation...................................................................................4
1. Introduction..........................................................................................5
2. Technical parameters..........................................................................6
2.1. Dimensions.....................................................................................................8
2.2. Recommended drawing symbol .....................................................................8
3. Conformity assessment ......................................................................9
3.1. Other tests....................................................................................................10
4. Power supply......................................................................................11
5. Outputs ...............................................................................................12
5.1. Rules for connecting loudspeakers...............................................................12
5.2. Wiring examples...........................................................................................13
6. Microphone input...............................................................................15
7. Ethernet...............................................................................................16
8. Indications and settings....................................................................17
8.1. System LEDs................................................................................................17
9. Configuration .....................................................................................18
9.1. Factory setting..............................................................................................18
9.2. Factory setting –parameters........................................................................18
10. Mounting.............................................................................................19
10.1. Installation rules............................................................................................19
11. Ordering information and completion .............................................20
11.1. Completion ...................................................................................................20
11.2. Optional accessories....................................................................................20
12. Maintenance .......................................................................................21
13. Waste disposal...................................................................................22

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History of revisions
Document name: rram-pwab1_g_en_101.pdf
Author: Jaroslav Šach
Revision
Date
Changes
100
9. 5. 2013
New document
101
11. 9. 2013
Drawing symbol correction. X3 connector renumbered
Indication and settings chapter added.
Related documentation
1. ACASYS-AS Programming manual
file: acasys-as_ms_en_xxx.pdf
2. ACASYS-AS Projection manual
file: acasys-as_mp_en_xxx.pdf
3. Application Note AP0037 –Principles of using Ethernet network
file: ap0037_en_xx.pdf

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1. Introduction
RRAM-PWA/B1 is a low frequency power amplifier with Ethernet interface,
designed to be used in rolling stock.
The RRAM-PWA/B1 amplifier involves an end stage module with integrated D-
class amplifier and the processor module for processing and conversion of IP
stream to amplified audio signal.
Device is supplied from factory only with loader. Before first use the user
application must be loaded into device.
Ethernet interface with indicated connecting to infrastructure
Microphone input
Integrated dual-channel low frequency audio amplifier
Speaker output for single direct circuit (coach saloon) and two switchable
circuits (coach side)
Control via Ethernet line
Mounting on base plate
To avoid damage of electronics the amplifier switches automatically off
whenever the critical temperature inside system is achieved.
Basic features

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2. Technical parameters
Number of outputs
3 × *)
Number of channels
2 ×
Permanent output sinus power
(THD = 1 %)
2 × 30 W **)
Peak music power output
2 × 48 W
Minimum load impedance
4 Ω / channel ***)
Frequency range
150 Hz to 20 kHz
Connection point
Connector WAGO 769-669/003-000
Wire cross section
0.75 mm2to 2.5 mm2
Maximum wire length
Within the single coach installation #)
*) The amplifier has two independent channels A and B. The channel B has
two outputs B1 and B2.
**) At 4 Ω load impedance, with power supply voltage VIN = 24 V DC and
ambient temperature +25 °C.
***) When both B1 and B2 outputs are in operation simultaneously, the
impedance for each output B1 and B2 must be 8 Ω minimally.
#) If the wire needs to be led outside of installation of coach, relevant
measures shall be taken to avoid the disturbances.
Microphone powering
Phantom supply 3 V to 3.3 V,
controlled by software
Input range
1 V pp. max.
Input impedance
600 Ω
Frequency range
15 Hz to 16 kHz
Connection point
BNC connector
Cable type
Shielded cable
Maximum wire length
Within the single coach installation *)
*) If the wire needs to be led outside of installation of coach, relevant
measures shall be taken to avoid the disturbances.
Number of lines
1 ×
Data transmission rate
100 Mbps
Galvanic separation
Yes
Insulation strength
500 V AC / 1 minute *)
Connection point
M12 connector, D-coding,
according to IEC 61375-3-4
Recommended cabling
STP CAT5
Maximum segment length
100 m
*) Insulation must not be used for dangerous voltage separation.
Nominal power supply voltage
24 V DC
Power supply voltage range
16.8 V DC to 33.6 V DC
Power consumption
Max. 3.2 A at 24 V DC *)
Starting peak current
Max. 18.9 A **)
Galvanic separation
No
Audio outputs
Note:
Microphone
input
Note:
Ethernet
Note:
Power supply

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Connection point
Connector WAGO 769-669/003-000
Wire cross section
0.75 mm2to 2.5 mm2
Maximum inlet wire length
30 m
*) At nominal power output 2 × 30 W to 4 Ω load impedance and power supply
voltage VIN = 24 V DC.
**) Peak inrush current duration is less than 10 ms.
Mechanical design
Metal cover
Colour
RAL 9005
Mounting
On the base plate
Ingress protection rate
IP20
Weight –netto
–brutto
0.93 kg ±5 %
1.22 kg ±5 %
Dimensions (w × h × d)
(186 × 74 × 109) mm
Unit overall mass of plastics
74 g
Included mass of self-
extinguishing plastics
74 g
Device does not contain
PUR, PVC, Asbestos
Device conforms
2011/65/EU (ROHS)
1907/2006EU (REACH)
Operating temperature range
-40 °C to 70 °C
Storage temperature range
-40 °C to 70 °C
Maximum ambient humidity
< 95 % non-condensing
Expected MTBF
> 150 000 h
Expected lifetime
15 years
Device is supplied with loader, which enables software downloading by application
RRAS Configurator via Ethernet line.
Equipment is intended to operate up to 1 400 m above the sea level
Equipment is designed to meet the Temperature Class TX.
According to EN 61373:2010 standard, the equipment is classified in terms of
vibrations into Category 1, Class B (mounting to vehicle body)
Permissible supplying voltage drop-outs duration: max 10 ms (Class S2 according to
Chapter 3.1.1.2 of EN 50155:2007).
For supply voltage switching are permissible conditions of C1 and C2 Class.
The device meets the SWSIL0 classification according to EN 50128:2011 Railway
applications - Communications, signalling and processing systems - Software for
railway control and protection systems.
The equipment meets the SIL0 classification according to EN 50129:2003 Railway
applications - Communication, signalling and processing systems - Safety-related
electronic systems for signalling.
Note:
Mechanics
Dangerous
materials
Temperatures
Others
Software
Claims EN
50155:2007
Safety
classification

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2.1. Dimensions
185,675,2
43,0
170,3
96,3
99,8
153,0
Fig. 1 - RRAM-PWA/B1 dimensions
2.2. Recommended drawing symbol
Following drawing symbol is recommended for RRAM-PWA/B1 amplifier:
PWR
RRAM - PWA/B1
X3
+A
-A
-B2
+B2
-B1
+B1
PE
GND
Vcc
3
4
5
2
3
4
5
1
2
X2
ETH
M12
X1
MIC
BNC
Fig. 2 - Recommended drawing symbol for RRAM-PWA/B1

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3. Conformity assessment
The equipment meets the claims of Czech government decree NV616/2006; the
conformity assessment has been performed in accordance with harmonized
standard EN 50121-3-2:2006.
Tested in accordance
with standard
Type of test
Classification
EN 55011:2009
Industrial, scientific and medical
equipment - Radio-frequency
disturbance characteristics - Limits
and methods of measurement
Complies
EN 61000-3-3:2008
Electromagnetic compatibility (EMC) –
Part 3-3: Limits –Limitation of voltage
changes, voltage fluctuations and
flicker in public low-voltage supply
systems, for equipment with rated
current 16 A per phase and not subject
to conditional connection
Complies
EN 61000-4-3:2006
Electromagnetic compatibility (EMC) –
Part 4-3: Radiated, radio-frequency,
electromagnetic field immunity test,
800 MHz to 1000 MHz
20 V/m
EN 61000-4-3:2006
Electromagnetic compatibility (EMC) –
Part 4-3: Radiated, radio-frequency,
electromagnetic field immunity test,
1000 MHz to 2100 MHz
10 V/m
EN 61000-4-3:2006
Electromagnetic compatibility (EMC) –
Part 4-3: Radiated, radio-frequency,
electromagnetic field immunity test,
2100 MHz to 2500 MHz
5 V/m
EN 61000-4-4:2012
Electromagnetic compatibility (EMC) –
Part 4-4: Testing and measurement
techniques - Electrical fast
transient/burst immunity test, power
supply
4 kV *)
EN 61000-4-4:2012
Electromagnetic compatibility (EMC) –
Part 4-4: Testing and measurement
techniques - Electrical fast
transient/burst immunity test, input
2 kV *)
EN 61000-4-5:2006
Electromagnetic compatibility (EMC) –
Part 4-5: Testing and measurement
techniques –Electrostatic discharge
immunity test, RS485.
4 kV *)
EN 61000-4-5:2006
Electromagnetic compatibility (EMC) –
Part 4-5: Testing and measurement
techniques –Electrostatic discharge
immunity test, power supply.
4 kV *)
EN 61000-4-6:2009
Electromagnetic compatibility (EMC) –
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-
frequency fields
10 V

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EN 61000-4-11:2004
Electromagnetic compatibility (EMC) –
Part 4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
Complies
*) Some disturbing noise can be heard in the speaker when disturbances
appear.
3.1. Other tests
This product was assessed and approved for use in railway applications
according to standards:
Tested in accordance
with standard
Type of test
Classification
EN 50155:2007
Electronic equipment used on rolling
stock.
Complies
EN 50121-3-2:2006
Electromagnetic compatibility (EMC) –
Part 3-2 Rolling stock –Apparatus
Complies
EN 61373:2010
Railway applications –Rolling stock
equipment –Shock and vibration tests.
Complies
EN 61000-4-29:2000
Electromagnetic compatibility (EMC) –
Part 4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
Complies
EN 60068-2-1:2007
Environmental testing –Part 2-1: Test
A: Cold
Complies
EN 60068-2-2:2007
Environmental testing –Part 2-2: Test
B: Dry heat
Complies

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4. Power supply
The RRAM-PWA/B1 amplifier can be powered by 24 V DC vehicle onboard
network.
Fig. 3 - Power supply connector location
Terminal
Label
Meaning
1
Vcc
Power supply, +24 V DC
2
GND
Power supply, ground
3
PE
Amplifier chassis
The PE terminal must be connected with vehicle frame.
PWR
RRAM - PWA/B1
X3
+A
-A
-B2
+B2
-B1
+B1
PE
GND
Vcc
3
4
5
2
3
4
5
1
2
X2
ETH
M12
X1
MIC
BNC
24 V=
Fig. 4 - Powering of amplifier RRAM-PWA/B1
X3 connector
numbering
(power
supply)
Note:
Wiring
example

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5. Outputs
Amplifier has two independent channels A and B. The channel B has two
outputs B1 and B2. Both outputs B1 and B2 can be connected simultaneously,
but conditions stated in chapter 5.1 Rules for connecting loudspeakers must be
complied. The nominal power output is valid for 4 Ω load impedance.
STANDBY, MUTE
GO +
Power 3V3
X3
X2
Ethernet
Temperature sensor
Audio
codec
OUT A
OUT B
OUT A
OUT B1
OUT B2
IN A
IN B
PWR, OK
Microphone
input
X1
CPU Amplifier
module
Power supply,
outputs
Power
supplies
LED indicators
RELAY SWITCHING
Outputs control
Fig. 5 - Amplifier RRAM-PWA/B1 block scheme
Terminal
Label
Meaning
4
+B1
B1 channel Output +
5
-B1
B1 channel Output –
6
+B2
B2 channel Output +
7
-B2
B2 channel Output –
8
-A
A channel Output –
9
+A
A channel Output +
5.1. Rules for connecting loudspeakers
The amplifier outputs can be connected to a different number of loudspeakers.
Rules for connecting:
Ensure the total minimum impedance 4 Ω for each channel by combination
of serial and parallel wiring of loudspeakers.
When both B1 and B2 outputs are in operation simultaneously, the speaker
impedance for each output B1 and B2 must be 8 Ω minimally (i.e. resulting
impedance at least 4 Ω). Overall power of combination of speakers must be
equal or greater than amplifier maximum output power.
When needed, whichever loudspeaker from combination can be substituted
by resistor with the same impedance (resistance) and wattage.
Observance of speaker polarity is needed (to prevent the sound distortion
due to antiphase).
X3 connector
numbering
(audio)

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5.2. Wiring examples
Number of speakers and layout of them must be determined by project
designer.
In next wiring examples, with accordance to need of spatial arrangement, any
speaker can be substituted by resistor with the same impedance and wattage.
+
-
+A
-A
Fig. 6 - Example of wiring single speaker 4 Ω, min. 30W
+
-
+
-
+A
-A
Fig. 7 - Example of wiring two 8 Ω speakers, with min. 15 W
+
-
+
-
+
-
+A
-A
+
-
Fig. 8 - Example of wiring four 4 Ω speakers, with min. 8 W

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+
-
+
-
+
-
+
-
+
-
+
-
+
-
+A
-A
+
-
Fig. 9 - Example of wiring 8 speakers 8 Ω, min. 4 W
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+A
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
-A
+
-
Fig. 10 - Example of wiring 16 speakers 4 Ω, min. 2 W

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6. Microphone input
Connector for attaching of an external microphone is located on the front side of
the amplifier. Unit allows to lead out power supply voltage to a connector for
connected microphone. Power supply output is controlled by unit's SW.
Fig. 11 - Location of microphone input connector
1 2
Fig. 12 - Wiring of BNC connector terminals
Terminal
Meaning
1
Microphone power supply 3 V –3.3 V, Microphone signal
2
Microphone powering –Ground, Microphone signal –Ground
As a suitable counterpart to BNC connector can be used TE 1-1478152-0.
X1 connector
wiring
Note:

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7. Ethernet
The Ethernet interface connector is located on the amplifier lateral side. LED
indicators are located next to Ethernet connector.
Fig. 13 - Location of Ethernet line connector
Ethernet connection state is indicated by LEDs (SPD and ACT). Following table
describes meaning of individual LEDs.
LED
Status
Meaning
ACT
Does not light
Device is not connected to Ethernet
Lights
Device is connected to Ethernet
Blinks
Communication in progress
SPD
Does not light
Communication speed 10 Mbps
Lights
Communication speed 100 Mbps
More details about Ethernet networking can be found in Application Note
AP0037.
1
4
3
2
4
1
3
2
Fig. 14 - Ethernet wires layout in M12 connector socket (front view)
Terminal
Meaning
1
Tx+
2
Rx+
3
Tx-
4
Rx-
Line state
indication
Note:
X2 connector
wiring

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8. Indications and settings
8.1. System LEDs
State of exchange unit is indicated by 2 LEDs on front panel.
Fig. 15 - Front panel system LEDs
Following table describes meaning of individual LEDs *).
LED
Colour
PWR
Green
OK
Green
LED
Status
Meaning
OK
Does not light
Loader does not use LED.
PWR
Lights
Device is OK
Does not light
Amplifier overload
*) Meaning of LEDs, described in table above applies for devices with loaded
generic application.
Too low impedance is attached to the amplifier output, amplifier is overheated
or damaged.
Note:
Amplifier
overload

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9. Configuration
All the amplifier configuration is performed via Ethernet interface. Some
changes in setting will take effect after restarting the amplifier.
9.1. Factory setting
The amplifier is fitted with „RESTORE“ button to get into factory setting. The
button should be pressed while switching the amplifier power supply on. The
OK LED which is located right next to the connector X3 shortly blinks after
successful execution of factory setting.
The „RESTORE“ button is accessible through small hole on amplifier housing
rear side.
Fig. 16 - Location of factory setting button
9.2. Factory setting –parameters
Parameter
Default value
Amplifier IP address
192.168.1.1
Network mask
255.255.255.0
Default gateway
0.0.0.0

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10. Mounting
The amplifier must be mounted such a way, that cooling ribs are vertically
oriented to ensure the efficient air flow. Mounting position with cooler down is
not allowed.
80,0
167,6
d 5,0
Fig. 17 - Location of mounting holes
10.1. Installation rules
Technical parameters of amplifier are guaranteed only when these wiring
principles are applied.
Connect the PE terminal of X3 connector to the vehicle frame with as low as
possible impedance.
For service and when utilized within the distributor frame can be used an
unshielded cable (UTP patch cable).
Use the STP cabling for permanent use outside the distributor frame.
Earthing
Ethernet
interface

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11. Ordering information and completion
RRAM-PWA/B1
Complete, see chapter Completion
11.1. Completion
Part
Quantity
RRAM-PWA/B1 unit
1
Counterpart for power supplying connector WAGO 769-109/021-000
1
Operation manual
1
Routine testing protocol
1
Insulation testing protocol
1
Warranty certificate
1
11.2. Optional accessories
FR8WP4OHM/B
Loudspeaker 4 Ω, black colour
FR8WP4OHM/W
Loudspeaker 4 Ω, white colour
FR8WP8OHM/B
Loudspeaker 8 Ω, black colour
FR8WP8OHM/W
Loudspeaker 8 Ω, white colour
FR8WP TES
Gasket for FR8WP
Amplifier
RRAM-PWA/B1
Loudspeaker