Solid State Logic C300 HD Installation Manual page 23

Section 4
Centuri – Analogue I/O Card
The Analogue card provides 24 channels of balanced line-level input and output. At least one Analogue card will need to
be included to feed the monitor speakers as the post monitor-pot signals are only assignable to analogue outputs. The
connectors used are Canon DL96 types. Mating connector kits and a contact crimp tool can be supplied (as cost options).
Analogue cards are fitted at the rear of the Centuri chassis.
See page 57 for the DL pinout.
Centuri – Digital I/O Card
The Digital I/O card is available in two versions: 110Ω and 75Ω . Both types provide 64 channels (32 AES/EBU pairs) of
digital input and output. The 110Ω card is equipped with balanced input and outputs whereas the 75Ω card is unbalanced
for correct matching to coaxial cables. A breakout panel is available as an option for the 75Ω card – this converts D-25
connectors to chassis BNC plugs and comes with 1m connecting looms. These panels should be mounted behind the
Centuri rack; they cannot be remotely located because the linking cables are unbalanced.
Sample rate conversion is available on every input so the card can accept input rates from 32kHz to 96kHz. Sample Rate
Conversion is also available on all outputs, either at any of the available System sample rates (Fs or 2Fs) or locked to a
nominated AES input on the same card. If the VSR option is fitted (see page 11), any AES input can be selected as the System
sample clock. The connectors are all D-25 type females and mating connectors can be supplied.
Digital cards are fitted at the rear of the Centuri chassis.
Centuri – Madi Card (Copper version)
The MADI I/O card can be configured to operate in 56/64 channel mode at Fs or in 28/32 channel mode at 2Fs. Both
Legacy (Fs) Framing* and Standard (2Fs) framing modes are available at 2Fs sample rates. The 56/28 channel mode supports
Fs ±12.5% varispeed operation. The 64/32 Channel mode will accept ±0.1% variations in sample frequency.
*Only synchronous 2Fs MADI signals with legacy framing are supported and any Word Clock or AES sync signal must be
disconnected from the MADI card or the audio will be muted.
Both Word Clock and unbalanced AES-3id sync inputs and outputs are provided. If the incoming MADI signal is synchronous
(i.e. derived from a device locked to the same reference as the C300HD processor core), then no external sync signal is
required. If, however, a valid Word Clock or AES sync signal is connected, the card will automatically default to using the
external sync reference to decode the MADI data stream. The Sync output signal always follows the current MADI sync
reference source and can be used to clock any connected device that requires a MADI/AES sync reference.
The MADI card includes input and output sample rate conversion which offers the same functionality as the Digital I/O
card except that the Word Clock input is used as the reference for Output sample rate conversion and is also required if
sample rate conversion is to be used on the MADI input.
The card is fitted with dual connections – MADI A and MADI B. The outputs are duplicates of the MADI signal so that a
safety backup can be made without having to use external distribution. For the inputs, MADI A has priority but MADI B
will become active if the A signal is lost. Refer to page 33 for further interfacing details.
Centuri – Madi Card (Fibre version)
Operates in exactly the same way as the copper version but the MADI connectors are now singlemode or multimode SC
optical types. The fibre type must be specified at time of order.
Centuri – GPI/O Card
The optional GPI/O card provides 60 GPI inputs and outputs. Inputs (which can trigger many console functions including
channel faders and cuts) are opto-isolated. The outputs are provided by relay closure. Access is via 25-pin D-type
connectors; inputs are male and outputs are female.
Only one GPI/O card can be fitted to the Centuri rack.
System Components
Page 19