IRT Electronics AMS-4170T User manual

4170t-ams.ib.rev0.doc Page 1 of 14 17/10/2007
IRT Eurocard
Type AMS-4170T
2 x 2 relay switcher
for SDI, G.703 or analogue video
&
AES, RS422 or stereo audio signals
Designed and manufactured in Australia
IRT can be found on the Internet at:
http://www.irtelectronics.com
I R T Electronics Pty Ltd A.B.N. 35 000 832 575
26 Hotham Parade, ARTARMON N.S.W. 2064 AUSTRALIA
National: Phone: [phone] Fax: [phone]
International: [phone] [phone]
Email: [e-mail]
Web: www.irtelectronics.com

4170t-ams.ib.rev0.doc Page 2 of 14 17/10/2007
IRT Eurocard
AMS-4170T
2 x 2 relay switcher
for SDI, G.703 or analogue video
&
AES, RS422 or stereo audio signals
Instruction Book
Table of Contents
Section Page
General Description 3
Technical Specifications 4
Configuration 5
Operation 6
SNMP 7
AMS-4170 SNMP Functions 9
Installation 10
SMU-4000 Installation 11
Figure 1: SMU-4000 module 11
Front & rear panel connector diagrams 12
Maintenance & Storage 13
Warranty & Service 13
Equipment return 13
Drawing index 14
This instruction book applies to units later than S/N 0504001.
Operational Safety:
WARNING
Operation of electronic equipment involves the use of voltages and currents that
may be dangerous to human life. Note that under certain conditions dangerous
potentials may exist in some circuits when power controls are in the OFF position.
Maintenance personnel should observe all safety regulations.
Do not make any adjustments inside equipment with power ON unless proper
precautions are observed. All internal adjustments should only be made by suitably
qualified personnel. All operational adjustments are available externally without the
need for removing covers or use of extender cards.

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IRT Eurocard
AMS-4170T
2 x 2 relay switcher
for SDI, G.703 or analogue video
&
AES, RS422 or stereo audio signals
General Description
The AMS-4170T consists of one “video” and two “balanced audio” switches. Each switch is arranged as a
changeover set with two inputs and two outputs. No terminations are provided on the board allowing the switcher to
be used in a wide variety of applications and with signals of various types and impedances.
The “video” path uses enhanced performance relays to provide switching capabilities for high-speed data signals up
to 270 Mb/s and may be used with analogue video, SDI, MPEG or RF signals. When used with SDI and high-speed
data signals all cable lengths should be kept to a minimum. For best performance the outputs should be connected to
inputs with automatic cable equalisation.
The “audio” path may be used for balanced or unbalanced audio or control signals (RS232, RS422, RS485 etc).
The AMS-4170T is ideally suited to applications where a simple choice between two inputs or outputs is required
and may be easily driven by audio, video or other detector circuits for automatic path selection.
Each switch is equipped with its own transistor driver circuit, which may be bypassed for direct operation of the
relay if desired. Links allow any of the three driver circuits to operate more than one of the sets of relays.
Front panel LED indicators are used to indicate the status of each relay circuit.
Front panel switches allow a choice of local or remote control operation.
An optional SNMP (Simple Network Management Protocol) plug-in module is available for remote monitoring and
control when used in conjunction with IRT’s 4000 series frame fitted with SNMP capability.
The AMS-4170T is designed to fit IRT’s standard Eurocard frames as well as IRT’s 4000 series frame for use with
IRT’s SNMP system and may be used alongside any other of IRT’s analogue or digital Eurocards.
Standard features:
• One video and two balanced audio changeover switches in one package.
• Video path suitable for SDI (270 Mb/s), analogue video, MPEG data streams @ 2, 8, 34, 45, 144 Mb/s.
• Audio path suitable for 2 balanced audio or data signals or 4 unbalanced audio or data signals.
• Married or independent operation
• Default path on power fail.
• Local or remote control.
• Optional plug in SNMP monitoring and control module.
• Front panel LED status indicators.
VIDEO A I/P
AMS-4170T FUNCTIONAL BLOCK DIAGRAM
VIDEO B I/P
VIDEO A O/P
VIDEO B O/P
AUDIO B (L) O/P
AUDIO A (L) O/P
AUDIO B (L) I/P
AUDIO A (L) I/P
AUDIO B (R) O/P
AUDIO A (R) O/P
AUDIO B (R) I/P
A
UDIO A (R) I/P
SNMP

4170t-ams.ib.rev0.doc Page 4 of 14 17/10/2007
Technical Specifications
IRT Eurocard module
Type AMS-4170T
Video:
Video crosstalk between channels < -70 dB to 10 MHz.
< -60 dB 10 MHz to 100 MHz.
< -50 dB 100 MHz to 300 MHz.
(With measured channel input terminated by 75 Ω.)
Audio:
Audio Crosstalk Between channels with measured channel input terminated by 600 Ohms.
Less than -90 dB (20 Hz - 20 KHz).
Control:
Inputs Ground active control to TTL level interface circuit, or
if interface circuit bypassed, to the relay coil with the common of the coil
circuit connected to +12 Volts.
Connectors:
Audio: 3 pin plug in screw termination sockets.
Control: 4 pin plug in screw termination socket.
Other:
Relay contact rating 24 Vdc - 1 A
100 Vac - 0.3 A
Power requirements: 28 Vac CT (14-0-14) or ±16 Vdc
Power consumption 1 VA.
Temperature range 0 - 50° C ambient
Mechanical Suitable for mounting in IRT 19" rack chassis with input, output and
power connections on the rear panel.
Finish: Front panel Grey background, black lettering & red IRT logo.
Rear assembly Detachable silk-screened PCB with direct mount connectors to Eurocard
and external signals.
Dimensions 6 HP x 3 U x 220 mm IRT Eurocard.
Supplied accessories Rear connector assembly with matching connectors for control inputs.
Optional accessories SNMP plug-in module for use with 4000 series frame fitted with SNMP
“Agent”.

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Configuration
Transistor drive to relays:
The AMS-4170T comes standard with links LK2, 4 & 6 installed. This allows TTL logic to directly drive the relays
via transistor drive circuits. It is not necessary to use TTL logic to drive the transistor drive circuits, however,
grounding on the control port is all that is needed.
Direct drive to relays:
Provision has been made for bypassing the transistor relay drivers if required. This may be desirable in situations
where switching is to be initiated by alarm circuits with relay outputs.
The relay driver circuit can be bypassed as follows:
1. Remove links LK 2, 4 & 6.
2. Hard wire shorting links in positions LK 3, 5 & 7.
Ensure that only one link is installed of each pair so that the circuit is set for either TTL or direct operation, but not
both.
Relay grouping:
Each video and audio channel is equipped with its own driver circuit. However each circuit is capable of driving all
three sets of relays if required. Links LK 8, 9 & 10 provide a means of inter-connecting the relay sets so that only
one or two control inputs are required.
Some useful configurations are:
Unison operation: All three circuits switch from one control signal.
1. Remove links LK 2, 4 & 6.
2. Connect links LK 8, 9 & 10.
3. Control is via SK 5 pin 1 to ground (SK 5 pin 4).
In order for the front panel switches to work as intended, AMS-4170T should be run in unison operation.
Separate video & stereo audio operation:
1. One control signal for video, and separate control signal for stereo audio.
2. Connect LK 9 & 10.
3. Control for video is via SK 5 pin 1.
4. Control for stereo audio is via either SK 5 pin 2, or SK 5 pin 3.
If controlling video and audio separately the front panel switches will only work on the video part of the circuit.
Input termination:
No terminations are provided on the module so that the switcher can function in changeover mode. For 2 x 1
switcher applications the following terminations should be installed.
Video:Output A only is used and should be terminated at connected equipment.
Output B should be terminated in 75 Ohms (or 50 Ohms if being used for 50 Ohm RF signals) using a BNC
termination plug.
Audio:
Outputs A only are used and should be terminated at connected equipment.
Output B may be terminated if desired by connecting termination resistors to the connector on the rear
assembly of the module. The resistor values should be chosen to match the characteristic impedance of the
rest of the connected audio system. For example for balanced 600 Ohms, two 300 Ohm resistors should be
used.
In most modern audio systems a low output impedance of approximately 40 Ohms and input impedances of
greater than 10 kOhms are used. If this is the case no termination of the unused audio output is required.

4170t-ams.ib.rev0.doc Page 6 of 14 17/10/2007
Operation
See Configuration section for relevant link settings.
Control connections:
Control connections are via SK 5 plug in screw terminating connector located on the rear assembly.
Connecting the appropriate control input to ground will cause the relays to operate and the output state to cross over
as follows: Control Input Output
High (or O/C*) A ↔A
B ↔B
Low (Gnd) A ↔B
B ↔A
Control input connector SK 5 pin configuration is as follows:
Pin Description
1 Video control
2 Left audio control
3 Right audio control
4 Gnd.
Note: * O/C = Open Circuit.
Front Panel Switches:
The AMS-4170T has two front panel switches – a local/remote switch and an activate/de-activate switch.
With the local/remote switch set to ‘remote’, the AMS-4170T behaves, and is controlled, as described above.
With the local/remote switch set to ‘local’, control connection via SK 5 on the rear assembly is bypassed. Control is
via the front panel activate/de-activate switch. Note that to fully function in the local mode, the AMS-4170T needs
to be run in unison operation as described in the Configuration section.
Note: SNMP control is disabled if the local/remote switch is set to local.

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SNMP
What Is It?
SNMP stands for Simple Network Management Protocol. It is an application layer protocol for managing IP
(Internet Protocol) based systems. SNMP enables system administrators to manage system performance, and to find
and solve system problems. SNMP runs over UDP (User Datagram Protocol), which in turn runs over IP.
Three types of SNMP exist: SNMP version 1 (SNMPv1), SNMP version 2 (SNMPv2) and SNMP version 3
(SNMPv3). It is not the intention here to discuss the differences between various versions, only to bring attention to
the fact that IRT Electronics modules, fitted with SNMP capability, use SNMPv1.
An SNMP managed network consists of three key components: Network Management Systems (NMS), agents, and
managed devices.
An NMS is the console through which the network administrator performs network management functions, such as
monitoring status (e.g. alarm states) and remote controlling, of a set of managed devices. One or more NMSs must
exist on any managed network. Generally the NMS is a computer running third party SNMP control software. There
are a number of third party SNMP software applications currently available on the market.
An NMS polls, or communicates with, an agent. An agent is a network management software module that resides in
a managed device. An agent has local knowledge of management information and translates that information into a
form compatible with SNMP. The agent, therefore, acts as an interface between the NMS and the managed devices.
The NMS sends a request message, and control commands for the managed devices, to the agent, which in turn
sends a response message, containing information about the managed devices, back to the NMS.
A managed device contains an SNMP agent and resides on a managed network. Managed devices collect and store
management information and make this information available to NMSs using SNMP.
Managed device agent variables are organised in a tree structure known as a Management Information Base (MIB).
Within the MIB are parameters pertaining to the managed device. An Object Identifier (OID) number within the
MIB defines the managed device type. This is a unique number specific to the model of managed device. Other
information relating to the device is also stored, information such as alarm states, controllable settings, etc. The MIB
tree is organised in such a way that there will be no two MIB files with conflicting placements.
Normally an NMS polls an agent for information relating to the MIB in a managed device to be sent back to the
NMS. When certain conditions are met within the MIB, such as major alarm conditions, for example, the agent
automatically sends what is known as a trap to the NMS without any prompting from the NMS. This allows
automatic notification of a predetermined event.
NMS
NMS
IP
Network
MIB
SNMP Agent
Protocol Engine SNMP Agent
MIB
SNMP Agent
Protocol Engine SNMP Agent
MIB
SNMP Agent
Protocol Engine SNMP Agent
SNMP Block Diagram

4170t-ams.ib.rev0.doc Page 8 of 14 17/10/2007
SNMP with IRT Products
IRT Electronics currently employs SNMPv1 with its 4000 series frame. The frame acts as an agent when fitted with
a CDM-4000 module. This module has its own designated slot next to the power supply so as to not affect the
number of modules that the frame will take. Communication between the NMS, the frame and its loaded modules
are via this CDM-4000 module. Note that the NMS software is third party and not supplied by IRT Electronics.
Ethernet connection for SNMP operation is via an RJ45 connector on the rear of the frame, below the mains inlet.
Ethernet rate runs at either 10 baseT or 100 baseT.
Frame parameters, such as Name, Address and Location, are set via an RS232 interface, a D9 connector on the rear
of the frame below the mains inlet. A software terminal emulator, such as Tera Term or HyperTerminal, is used for
setting and reading the parameters of the frame.
IRT modules that are SNMP compatible need a plug-in SMU-4000 module with a program relevant to the module
that it is plugged into. Depending on the module, besides the module identification, parameters such as alarm states,
inputs and controls etc. are communicated to the CDM-4000 agent via a data bus on the rear of the frame. Thus the
CDM-4000 collects information on what is loaded within the frame, what positions they occupy, and their current
status for communication to the NMS when the NMS sends a request for information.
In the event of a major alarm from any of the SNMP compatible modules, or power supplies, a trap is automatically
sent by the CDM-4000 agent to the NMS without any prompting by the NMS. This alerts the operator to any fault
conditions that may exist that need immediate attention.
FRU-4000
FRAME
110/240 V 50/60 Hz
0.7 A (max.)
FUSES
110/120 Vac
1A S.B.
220/240 Vac
500 mA S.B.
AS3260 approval no.: CS6346N
Ass. no.: 804692
+-
48Vdc
Alarm
RS232
Ethernet
IRT SNMP Connections
IRT modules fitted
with SMU-4000 PSU’s
CDM-4000
IRT 4000 Series Frame
IRT 4000 Series Frame
IRT modules fitted
with SMU-4000 PSU’s
CDM-4000
IP
Network Ethernet Cable
Ethernet Cable
Ethernet Cable
NMS
IRT 4000 Series SNMP Setu
p

4170t-ams.ib.rev0.doc Page 9 of 14 17/10/2007
AMS-4170T SNMP Functions:
With the AMS-4170T fitted with the optional plug-in SMU-4000 SNMP module, programmed with the firmware to
suit and installed in an IRT 4000 series frame with SNMP capability, the AMS-4170T can be interrogated and
controlled by an SNMP Network Management System (NMS).
The following SNMP functions are capable of being monitored and controlled by an NMS:
The current state of the Video switch state;
The current state of the Left Audio switch state;
The current state of the Right Audio switch state;
The current state of the front panel switches (relevant to AMS-4170T only),
Note: SNMP control is disabled if the local/remote switch is set to local;
A change of state to the Video switch (when changeover initiated by the
Video TTL control circuitry);
A change of state to the Left Audio switch (when changeover initiated by the
Left Audio TTL control circuitry);
A change of state to the Right Audio switch (when changeover initiated by
the Right Audio TTL control circuitry);
Whether “Trap” function is enabled; and
Trap automatically sent, if enabled, on change of switch state.

4170t-ams.ib.rev0.doc Page 10 of 14 17/10/2007
Installation
Installation in frame or chassis:
See details in separate manual for selected frame type.
See also Configuration section.
Video connections:
Video signal connections are made to BNC coaxial connectors. No termination of inputs is provided on the module.
When switched to the output the input load impedance is that of the load connected to the output. If AMS-4170T is
being used for a 2x1 switch application, second output should be terminated with a BNC terminator of correct
termination resistance to match source impedance, usually 75 Ohm.
Audio connections:
Audio signal connections are made to plug in balanced screw terminating connectors. No termination of inputs is
provided on the module. When switched to the output the input load impedance is that of the load connected to the
output.
Control connections:
Control connections are via SK 5 plug in screw terminating connector located on the rear assembly.
Connecting the appropriate control input to ground will cause the relays to operate and the output state to cross over
as follows: Control Input Output
High (or O/C*) A ↔A
B ↔B
Low (Gnd) A ↔B
B ↔A
Control input connector SK 5 pin configuration is as follows:
Pin Description
1 Video control
2 Left audio control
3 Right audio control
4 Gnd.
Note: * O/C = Open Circuit.

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SMU-4000 Installation
The SMU-4000 plug-in SNMP management controller module can only be fitted to IRT’s 4000 series modules that
are capable of being SNMP upgradeable. To determine whether a module is SNMP upgradeable, a square section
on the main PCB is silk screened and fitted with three multipin sockets – as shown below:
This is where the SMU-4000 plug-in SNMP management controller module is fitted. The three sets of multipins on
the underside of the SMU-4000 line up with the three sets of multipin sockets on the main PCB module. Align all
pins and then gently press the SMU-4000 all the way down into place.
If the SMU-4000 is not already programmed with the correct firmware to match the module that it is being plugged
into, it then needs to be programmed via the pins on the topside of the SMU-4000.
Note that installation will generally be done by IRT Electronics at the time of ordering.
Note also that an SMU-4000 will only be functionally operational when the main module that it is plugged into is
fitted into an IRT 4000 series frame fitted with a CDM-4000 SNMP agent and being interrogated by a suitable
Network Management System.
1J2
1J1 1J3
Figure 1: SMU-4000 module

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Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show relative positions of
connectors, indicators and controls only.
P4
P3
A
MS-
417
0
OUT B
OUT A
IN A
IN B
CONTROL
1234
-
+
G
-
+
G
-
+
G
-
+
G
-
+
G
-
+
G
-
+
G
-
+
G
OUT B IN B OUT A IN A
LEFT
A
UDIO
RIGHT
A
UDIO
CHANGEOVER
DC
AMS-4170T
N140
LOCAL
VIDEO
AUDIO 1
AUDIO 2
DE-ACTIVATE
ACTIVATE
REMOTE
LOCAL

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Maintenance & storage
Maintenance:
No regular maintenance is required.
Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind.
This is especially important in fibre optic equipment where cleanliness of optical connections is critical to
performance.
Storage:
If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed
plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be
included to deter corrosion.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Warranty & service
Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary
conditions apply under a particular contract of supply. For situations when “No Fault Found” for repairs, a
minimum charge of 1 hour’s labour, at IRT’s current labour charge rate, will apply, whether the equipment is within
the warranty period or not.
Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on
components shall be extended by IRT only to the extent obtainable from the component supplier.
Equipment return:
Before arranging service, ensure that the fault is in the unit to be serviced and not in associated equipment. If
possible, confirm this by substitution.
Before returning equipment contact should be made with IRT or your local agent to determine whether the
equipment can be serviced in the field or should be returned for repair.
The equipment should be properly packed for return observing antistatic procedures.
The following information should accompany the unit to be returned:
1. A fault report should be included indicating the nature of the fault
2. The operating conditions under which the fault initially occurred.
3. Any additional information, which may be of assistance in fault location and remedy.
4. A contact name and telephone and fax numbers.
5. Details of payment method for items not covered by warranty.
6. Full return address.
7. For situations when “No Fault Found” for repairs, a minimum charge of 1 hour’s labour will apply,
whether the equipment is within the warranty period or not. Contact IRT for current hourly rate.
Please note that all freight charges are the responsibility of the customer.
The equipment should be returned to the agent who originally supplied the equipment or, where this is not
possible, to IRT direct as follows.
Equipment Service
IRT Electronics Pty Ltd
26 Hotham Parade
ARTARMON
N.S.W. 2064
AUSTRALIA
Phone: [phone] Fax: [phone]
Email: [email protected]

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Drawing Index
Drawing # Sheet # Description
805036 1 AMS-4170 main circuit schematic.
805036 2 AMS-4170 power supply schematic.
805036 3 AMS-4170 SNMP interface.

Title
SCALE
SIZE
Sheet
DRAWN CHECKED ENG. APP. Revision:
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of1
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
A3
N.T.S. 3
AMS-4170
805036
Date:
1
12-Aug-2005
+5V
+5V
+12V +12V +12V
PC805037 AUDIO XTALK @ 15KHz > 85dB DC Itot MAX = 115mA VIDEO XTALK @ 270MHz > 50dB VIDEO XTALK @ 10MHz > 70dB
2 1
R2
3K0
2 1
R3 1K
21
R1
4K7
2 1
R4
3K0
21
R5
2K2
21
LD1
'grn'
21
LD2 'grn'
21
LD3
'grn'
21
R10 2K2
21
R15
2K2
1 2
C5
100nF
2 1
LK2
2 1
LK3
2 1
LK8
2 1
LK9
2 1
LK10
1 2-03-2005
FOUR PORT RELAY SWITCHER
VIDEO + STEREO AUDIO
1 2 3 4 5 6 7 8 9
10 13
14 15 16 17 18 19 20 21 22
K1
G5Y-254P
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B
10A 10B
5B
11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B
9A 9B
20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
P1
DIN64
7 8
10
K3C
6 5
3
K4B
112
K4A
7 8
10
K4C
112
K3A
6 5
3
K3B
112
K6A
112
K5A
7 8
10
K5C
6 5
3
K6B
7 8
10
K6C 6
5
3
K5B
31b 32b 32a
AC-1 AC-2 AC-3 AC-4
Power Supply 805036s2.sch
ALARM
TX
RX
L AUDIO VIDEO VIDEO TALLY L AUDIO TALLY R AUDIO TALLY R AUDIO LOC.ACTIVE REM/LOC
SNMP Interface 805036s3.sch
32
1
Q1
BSS123
32
1
Q2
BSS123
32
1
Q3
BSS123
13
2D5
BAS16
1 3
2
D8 BAS16
+5V
+5V
2 1
R7
3K0
2 1
R8 1K
21
R6
4K7
2 1
R9
3K0
1 2
C6
100nF
2 1
LK4
2 1
LK5
32
1
Q4
BSS123
32
1
Q5
BSS123
32
1
Q6
BSS123
13
2D6
BAS16
+5V +5V
2 1
R12 3K0
2 1
R13
1K
21
R11 4K7
2 1
R14
3K0
1 2
C7
100nF
2 1
LK6
2 1
LK7
32
1
Q7
BSS123
32
1
Q8
BSS123
32
1
Q9
BSS123
13
2D7
BAS16
1 3
2
D9
BAS16
1 3
2
D10
BAS16
De-activate
Activate
Local
Remote
AMS-4170T 'option'
AMS-4170T option provides front panel local control of relay switching. LK8, LK9 & LK10 are all 'IN' circuit so that all relays switch at the same time. LK3, LK5 & LK7 are all 'OUT' of circuit so that the transistor drive circuit is used to control the relays. LK2, LK4 & LK6 are all 'OUT' of circuit and LK2 is connected as shown for the 'T' option. ON board links must be set as follows:
5
4 6
SW1B
2
1 3
SW2A
5
4 6
SW2B
2
1 3
SW1A
21 R16
4K7
21 R17
4K7
+12V
+5V +5V
21
LD5 'red'
(LOCAL)
+5V
21 R18
560R
'R AUDIO' 'L AUDIO' 'VIDEO'
CONTROL
IN A
OUT A
IN B
OUT B OUT B IN A OUT A
IN B
OUT B IN A OUT A IN B
L1R
L4R
L3R L2R
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B 10A 10B 5B 11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B 9A 9B 20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
J1
DIN64
3 2 1
AL4
3 2 1
AL3
3 2 1
AL2
3 2 1
AR2
3 2 1
AL1
3 2 1
AR4
3 2 1
AR1
3 2 1
AR3
4 3 2 1
SK5
SK1 SK2 SK4 SK3
1 2 3
J3
1 2 3 4 5 6
P4
1 3 5 7 9
P3
RXTX
2 1
R1R R
2 1
R2R R
2 1
R3R R
2 1
R4R R

Title
SCALE
SIZE
Sheet
DRAWN CHECKED ENG. APP. Revision:
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of2
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
A3
N.T.S. 3
AMS-4170
805036
Date:
1
12-Aug-2005
AC-1 AC-2 AC-3 AC-4
+12V
+5V
+5V+12V
12
C2
1uF
I
1O3
C
2
C
4
U1
7812
12
C3
1uF
12
C4
10uF
12
C1
470uF
21
LD4
GRN
I
3
G
2
O1
U2
78L05
12
C8
10uF
12
C9
10uF
2 1
D1
1N4004
2 1
D2
1N4004
2 1
D3
1N4004
2 1
D4
1N4004
1 3
2
FL1
DSS306
1 3
2
FL2 DSS306
1 3
2
FL3 DSS306
1 3
2
FL4 DSS306
1 2-03-2005
Power Supply
RBB
21
R19
560R
1 2
F1
4R7
1 2
F2
4R7
1 2
F3
4R7
1 2
F4
4R7

Title
SCALE
SIZE
Sheet
DRAWN CHECKED ENG. APP. Revision:
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of3
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
A3
N.T.S. 3
AMS-4170
805036
Date:
1
12-Aug-2005
21
R20 4K7
1 2 3 4 5 6
1J3
RX
TX
ALARM
32
1
Q10
BSS123
1 3
2CR1
N.C.
+5V
13A 13B 16A
MAJOR ALARM
SNMP interface
D10 WILL PULL ALARM LOW ON POWER LOSS THROUGH 5V PULL-UP IN NETWORK CARD IN FRAME
+5V
1 2 3 4 5 6 7 8 10 9
1J2
1 2 3 4 5 6 7 8 10 9
1J1
SMU-4000
ASSEMBLY 804857
SNMP CPU Sub-Module
K.N.
1 2-03-2005
VIDEO TALLY
PTB0 PTA0
R AUDIO
PTB1 PTB3 PTB2 PTB5
L AUDIO TALLY
L AUDIO
VIDEO
R AUDIO TALLY
PTB4 PTA3 PTA2 PTA1 PTA4 PTA5 PTA6 PTA7 PTB7 PTB6 PAD4
REM/LOC
LOC.ACTIVE
nLOCAL ACTIVE nLOCAL R AUDIO SWITCHED L AUDIO SWITCHED VIDEO SWITCHED