I/O - Digital Card - Solid State Logic C100HDSS Installation Manual

Section 5
I/O – Digital Input/Output Card 110Ω (SSL ref. 942XF)
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. All inputs and outputs are balanced at 110Ω and cables with the correct matching impedance
must be used.
Refer to Appendix C for the connector pinout for this card.
Mating connector kits can be ordered for the card.
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. 942XJ)
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 panel is 2U high and is fitted with 64 chassis mounted
BNC plugs – 32 input and 32 output. One-metre length D25–D25 interconnecting looms are provided. A 3m loom is
available to order at additional cost. These looms must not be extended as the signals are unbalanced – doing so will give
rise to errors in the data.
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.
Installation Wiring
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