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5601ACO2
Automatic Changeovers
The 5601ACO2 Automatic Changeovers are intended for use with two 5601MSC
Master Clock/Sync Generators. The 5601ACO2 system uses latching relays to
ensure maximum reliability and minimal disruption in the event of any failure. The
complete system provides the highest level of security for television station video
and time synchronization systems. The 5601ACO2 is a 2RU ACO for all outputs
of the 5601MSC. Two power supplies are included as a standard feature, to
alleviate any single point of failure concerns.
There are three switches behind the front panel for added security. There is an
AUTO/MANUAL switch, a GPI/FRONT PANEL switch and an A/B select switch
for manual changeover. In automatic mode, all signals from both 5601MSC are
monitored to detect any abnormal signals. For example, if a level, pulse width,
phase, time code error or other abnormality is detected, the 5601ACO2’s circuitry
will trigger and the entire bank of signals will be switched to the backup 5601MSC.
In manual mode the changeover can be operated from a GPI or from the front
panel switch. LEDs provide status information as to the health of the two
5601MSC, together with indication as to which one is active. In addition, two GPO
outputs indicate which master is active and when the inputs from both masters
are not the same.
The 5601ACO2 features selectable voting via VistaLINK
®
for autochangeover
features. Individual inputs may selectively be included or excluded in the voting
process to drive autochangeover logic (feature only available on 5601ACO2 and
5600AC02 models).
Each 5601MSC is equipped with 2 GPI inputs and 2 GPO outputs. To facilitate
installation, these connections are brought through to a 2x6 pin terminal block on
the 5601ACO2. The outputs from the 5601MSC are passed straight through the
5601ACO2s. The inputs to the 5601MSC’s are internally split by a 'Y' connector,
to ensure that both 5601MSC’s receive the same GPI contact closures.
In the event of a changeover occurrence, it is necessary that all outputs on one
5601MSC have the same timing as those on the other. Identical timing for both
5601MSC’s is assured by locking both to the same frequency and phase source
(e.g. GPS or by genlocking one 5601MSC to the other). Identical phasing of the
independent black outputs is assured by implementing the "Syncro" mode in the
5601MSC’s. To use this mode, both 5601MSC’s syncro ports are connected
together using the DB15 link cables supplied with the 5601ACO2. With both
5601MSC’s operating in Syncro mode, timing adjustments made to one 5601MSC
will be automatically applied to both. The link cable is connected permanently, so
that any system re-timing will be applied to both 5601MSC units. (See system
connection diagram on 5601MSC brochure).
3G/HD/SD (8),
SYNC (6),
ATG(2), 10MHz,
WORDCLOCK,
UNBAL. AES (2)
UNBAL.DARS
Inputs
BALANCED AES (2),
BALANCED DARS,
ANALOG AUDIO (2)
Inputs
LTC/IRIG (2), GPI (2)
Inputs
A
6 dB
attenuatorn
on 3G/HD/
B
A
B
A
B
3G/HD/SD EQ, VIDEO
SYNC Slicer, 10MHz,
WORDCLOCK Slicer
3G/HD/SD EQ, VIDEO
SD
SYNC Slicer, 10MHz,
WORDCLOCK Slice
AES/DARS Rx
AES/DARS Rx
LTC Slicer, GPI
LTC Slicer, GPI
Relays
GPO
Interface
Internal
termination
(not on 3G/
HD/SD)
3G/HD/SD (8),
SYNC (6), ATG(2),
10MHz,
WORDCLOCK,
UNBAL. AES (2)
UNBAL.DARS
Outputs
BALANCED AES (2),
BALANCED DARS,
ANALOG AUDIO (2)
Out
GPO from processor (2),
GPI from Inputs(2)
Format Validation
GPIO Processor
Selector Guide
Latching
Relays
Latching
Relays
Latching
Relays
Latching
LTC/IRIG
(2) Out
LTC/IRIG
In
TM
VistaLINK
CPU
COM
(RS232)
Interface
www.evertz.com
5601ACO2
Automatic Changeovers
5601ACO2 2RU Automatic Changeover System complete with 2 power supplies,
2 power cords and 2 DB15 cables (BNC cables not included)
LTC/IRIG Inputs and Outputs:
Standard: SMPTE 12M-1 frame rate set by
5601MSC or IRIG-B
Inputs: 2 per 5601MSC
Outputs: 2
Connectors:
Inputs: Female DB15
Outputs: 3-pin male XLR type
Signal Level: Set in 5601MSC
Coaxial Inputs and Outputs:
Type: Depends on signal connected from
5601MSC
HD-SDI, SD-SDI, Analog TG, AES,
DARS, bi-level or tri-level sync, colour
black, 10MHz, Word Clock
Number: 16 groups each consisting of two
inputs and one output
Connector: BNC per IEC 61169-8 Annex A
ACO General Purpose Inputs and Output:
Inputs:
GPI1: Master select in Manual GPI control mode
Low: Selects Master A
High: Selects Master B
GPI2: Future use
Outputs:
GPO1: Low: Master A is selected
High: Master B is selected
GPO2: Low: Master A & Master B differ or
PSU failure
High: Master A and B have equivalent
signals
Type:
Inputs: Opto-isolated input with internal pull-up
to +5V
Outputs: Normally closed relay to ground.
10kW internal pull-up to +5V when relay
is in active position
Connector: 4 pins plus 2 ground pins on 12-pin
removable terminal block
Signal Level: +5V nominal
MSC General Purpose Inputs and Output:
Inputs: 2 GPI inputs connected to both
Master A and Master B
Outputs: 2 GPI outputs connected from Master
A through AUXI/O A
2 GPI outputs connected from Master
B through AUXI/O B
Connector: 6 pins on 12-pin removable terminal block
Signal Level: As specified in 5601MSC manual
Changeover conditions:
Changeover is a voting system based on which source has the
most good signals and that the good signals on the current
master are also present on the backup master. The input
signals are considered good according to the following criteria:
Video: Level below 70 IRE
Sync: H timing detect
10MHz: 3dB level below 0.3V p-p
DARS: Sync word error
LTC: Level below 0.3V p-p
Incorrect sync word
Electrical:
Power: Auto ranging 100-240V AC,
50/60Hz, 40W
Configuration: Dual redundant supplies
Fuse Rating: 250V, 1 amp, time delay
Safety: ETL Listed
Complies with EU safety directives
EMI/RFI: Complies with FCC Part 15 Class A
Complies with EU EMC Directive
Physical:
Dimensions: 19" W x 3.5" H x 11.5" D.
(483mm W x 90mm H x 292mm D)
Weight: 16lbs (3.5kg)
Specifications
Ordering Information
• Three protected switches select automatic, front panel or GPI activation
of changeover
• Front panel status LEDs show the health of each of the inputs
• Front panel status LEDs show the operational modes of the changeover
• Redundant power supply standard
• Push button to show cause of last changeover
• Dual hot swappable power supplied and fans
• Hot swappable main board
• GPIO input/outputs
• Automatic changeover is a voting system based on which source has the
most valid signals and that the valid signals on the present master are
also on the backup
• VistaLINK
®
control for device configuration and status monitoring
(5601ACO2 and 5601ACO2 only)
• 6 video/sync or other coaxial signals
• 10MHz frequency reference
• Word clock output
• DARS and 2 AES
• 2 Longitudinal (LTC/EBU) timecode outputs
• 8 SD/HD/3G outputs
• 2 Analog video test signal output
Features & Benefits
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