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The RIO is a 7U high 344mm deep 19” rack unit. Each RIO requires mains power supply and fibre optic cable connection
to the Blackrock processor. A maximum of four RIOs can be connected to each C100 system.
All plug-in cards and connectors are accessed via the front of the RIO making it suitable for installation into equipment
racks where space is limited. The unit is cooled from front to back using temperature controlled low-noise fans so space
for ventilation must be provided behind the rack. A standard 600mm rack provides adequate ventilation space.
RIOs can be fitted with one or two removable power supplies. A single PSU unit has sufficient capacity to supply a fully
fitted RIO thus full PSU redundancy can be achieved by fitting two units.
Beneath the power supplies is racking space for six plug-in cards. The uppermost slot is always fitted with the RIO Interface
Card. This card provides four fibre MADI interface ports as standard for connection to the Blackrock processor. To
accommodate higher channel counts, the interface card can be upgraded to the SSL Blacklight standard.
The interface card is also equipped with 24 channels of opto-isolated GP input and 24 relay-closure outputs.
For connector pinouts refer to page 4-10.
A sync output connector is included which provides a feed of the system’s Wordclock reference.
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Below the interface card five slots are available into which a range of input/output cards can be fitted:
24-channel analogue I/O
64-channel digital I/O 110R balanced
64-channel digital I/O 75R unbalanced
12 channel microphone input.
Cards can be fitted in any combination. Cards must be installed starting with slot one, directly below the Interface card,
and added in order. See the following page for I/O card details.
Unused slots must be fitted with a blanking panel (supplied) to maintain the correct airflow through the rack.
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Four fibre ports are available for connection to the Blackrock processor. The default data interface uses the MADI
standard which provides 64 I/O channels per fibre link*. The maximum number of audio channels is therefore 256* (4x64).
*To be precise, the limit is actually 254 channels. This is because two channels out of the first MADI stream are reserved for
sync, control and status information. See page 3-15 for additional information.
If redundant links or redundant processing is required then the number of audio channels available will be proportionally
reduced.
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To maintain full channel capacity, the fibre interface assembly can be upgraded to the SSL Blacklight standard which
increases the channel capacity to 256 for each fibre link.
Each fibre interface may be fitted with either a multimode (standard) or singlemode adapter. The fibre specification chosen
will be determined by the maximum distance of the cable runs required – refer to the table on page 2-9. Singlemode and
multimode interfaces and connectors are almost identical in appearance but are operationally incompatible – the standards
must NOT be mixed within a system.
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DSP and Audio Processing
Weight and Dimensions
