I/O - Digital Card; I/O - Madi Card - Solid State Logic C300 HD Installation Manual

Section 5
I/O – Digital Input/Output Card 110Ω (SSL ref. 902XF)
The Digital Input Card provides 32 balanced AES/EBU signal pairs of input and output. All circuits are accessed via 25-pin
D-type female connectors.
Refer to Appendix C for the connector pinout for this card. Mating connector kits can be ordered for the card.
As in the case of the Analogue I/O, cards added subsequently should be placed to the left of existing cards.
When assigning digital output channels as insert sends, the routing system will automatically assign the same input
channel number as the corresponding return. It is therefore necessary to physically wire outboard equipment so that
circuit allocation follows this arrangement.
I/O – Digital Input/Output Card 75Ω (SSL ref. 902XJ)
This version of the Digital I/O card is externally identical to the 110Ω version (apart from its designation number). The
Impedance of each input and output circuit however, is now 75Ω and unbalanced for correct matching to installations using
co-axial cabling.
A separate BNC interface panel is available as a cost option. This is 2U high and is fitted with 64 chassis mounted BNC
plugs – 32 input and 32 output. 1metre D25–D25 interconnecting looms are provided. These looms should not be
extended beyond 1m as the signals are unbalanced and signal quality may be reduced.
As in the case of the Analogue I/O, cards added subsequently should be placed to the left of existing cards.
When assigning digital output channels as insert sends, the routing system will automatically assign the same input
channel number as the corresponding return. It is therefore necessary to physically wire outboard equipment so that
circuit allocation follows this arrangement.
I/O – MADI Card (SSL ref. 902XG copper version / 902XH/K fibre versions)
The MADI I/O Card can operate in 56 or 64 channel mode at Fs or in 28/32 channel modes at 2Fs. Both Word Clock and
AES-3id (unbalanced) sync inputs and outputs are fitted.
If the incoming MADI signal is synchronous, no additional sync reference is required. However if 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. A Sync reference is always required if the incoming MADI stream in asynchronous or if varispeed and/or sample
rate conversion is required.
The fibre optic versions of the card are available with singlemode or multimode connections. Ensure that the matching
cable type is used. The recommended maximum cable length for the singlemode version is 2km and for the multimode
version is 550m.
Installation Wiring
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