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I/O – Digital Input/Output Card 110Ω (SSL ref. 902XF)
The Digital Input Card provides 32 balanced AES/EBU signal pairs of both input and output. All circuits are
accessed via 25-pin D-type female connectors.
R
efer 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.
Note. When assigning digital card 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 the 110Ω version (apart from its designation
number). The Impedance of each input and output circuit however, is now 75Ω 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.
As in the case of the Analogue I/O, cards added subsequently should be placed to the left of existing cards.
Note. When assigning digital card 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 two ways: either as a 56 channel varispeed I/O (multitrack interface) or as a
64 channel 48kHz link (station router). In either case a source of sync is required. The sync source can be AES,
Word sync or self clocked from the MADI bitstream.
The Card is fitted with dual MADI 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. On the input side, MADI
A has priority but MADI B will take-over if the A signal is lost.
The fibre version of the card – see page 18 – has duplex SC optical connectors for both MADI A and B. The Fibre
type can be either singlemode or multimode (this must be specified at time of order).
Installation Wiring
Section 5
Page 35